// Detail content cho 1 phiếu Duyệt NCC. Flat render (no tabs): Thông tin +
// NCC + Hạng mục + Báo giá stack vertically trong 1 màn hình.
// Duyệt history + Lịch sử thay đổi → moved to Panel 3 (xem PeWorkflowPanel
// → PeApprovalsSection + PeHistorySection).
import { useRef, useState } from 'react'
import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
import { useNavigate } from 'react-router-dom'
import { toast } from 'sonner'
import { Check, Paperclip, Pencil, Plus, Trash2, Upload } from 'lucide-react'
import { Button } from '@/components/ui/Button'
import { Dialog } from '@/components/ui/Dialog'
import { Input } from '@/components/ui/Input'
import { Label } from '@/components/ui/Label'
import { Select } from '@/components/ui/Select'
import { api } from '@/lib/api'
import { getErrorMessage } from '@/lib/apiError'
import { cn } from '@/lib/cn'
import {
  PeAttachmentPurpose,
  PeAttachmentPurposeLabel,
  PeDepartmentKind,
  PeDepartmentKindLabel,
  PurchaseEvaluationPhase,
  PurchaseEvaluationPhaseColor,
  PurchaseEvaluationPhaseLabel,
  PurchaseEvaluationTypeLabel,
  type PeAttachment,
  type PeChangelog,
  type PeDepartmentOpinion,
  type PeDetailBundle,
  type PeDetailRow,
  type PeQuote,
  type PeSupplier,
} from '@/types/purchaseEvaluation'
import { BudgetPhase, type BudgetListItem } from '@/types/budget'
import type { Paged, Supplier } from '@/types/master'

const fmtMoney = (v: number) => v.toLocaleString('vi-VN')

// Main detail content — flat render 3 section không tabs.
// Tên giữ PeDetailTabs để không break callsite (rename gây churn).
//
// `mode` (2026-05-07):
//  - 'detail' (default): full UX — Section 5 Ý kiến 4PB editable theo readOnly.
//    Dùng ở leaf "Danh sách" + "Duyệt" (3-panel pages).
//  - 'workspace': dùng ở leaf "Thao tác" (2-panel workspace). Section 5 LUÔN
//    disabled (Q5 user — ý kiến nhập khi duyệt, không phải workspace nhập liệu).
//    Workflow Panel + Approvals + History KHÔNG render trong PeDetailTabs (luôn
//    ở caller PeWorkflowPanel — workspace caller skip render Panel 3 hoàn toàn).
export function PeDetailTabs({
  evaluation,
  onBack,
  onDelete,
  readOnly = false,
  mode = 'detail',
  autoEditHeader = false,
}: {
  evaluation: PeDetailBundle
  onBack: () => void
  onDelete: () => void
  /** Menu "Duyệt" (pendingMe=1) — ẩn mọi action thêm/sửa/xóa, chỉ xem + duyệt phase. */
  readOnly?: boolean
  /** 'workspace' = Section 5 LUÔN disabled (ý kiến nhập ở leaf Duyệt). */
  mode?: 'detail' | 'workspace'
  /** Auto open Section 1 InfoTab in edit mode khi mount — triggered từ pencil icon Panel 1 */
  autoEditHeader?: boolean
}) {
  const navigate = useNavigate()
  const isDraft = evaluation.phase === PurchaseEvaluationPhase.DangSoanThao
  const opinionsReadOnly = readOnly || mode === 'workspace'

  return (
    <div className="rounded-lg border border-slate-200 bg-white shadow-sm">
      <div className="flex flex-wrap items-center justify-between gap-2 border-b border-slate-200 px-5 py-3">
        <div>
          <div className="flex items-center gap-2">
            <h2 className="text-base font-semibold text-slate-900">{evaluation.tenGoiThau}</h2>
            <span
              className={cn(
                'rounded px-1.5 py-0.5 text-[11px] font-medium',
                PurchaseEvaluationPhaseColor[evaluation.phase],
              )}
            >
              {PurchaseEvaluationPhaseLabel[evaluation.phase]}
            </span>
            {readOnly && (
              <span className="rounded bg-slate-100 px-1.5 py-0.5 text-[11px] font-medium text-slate-600">
                chế độ duyệt
              </span>
            )}
          </div>
          <div className="mt-0.5 flex flex-wrap items-center gap-2 text-[12px] text-slate-500">
            <span className="font-mono">{evaluation.maPhieu ?? '—'}</span>
            <span>·</span>
            <span>{PurchaseEvaluationTypeLabel[evaluation.type]}</span>
            <span>·</span>
            <span>{evaluation.projectName}</span>
            {evaluation.drafterName && <><span>·</span><span>Soạn: {evaluation.drafterName}</span></>}
          </div>
        </div>
        <div className="flex gap-2">
          {isDraft && !readOnly && (
            <>
              <Button variant="ghost" onClick={() => navigate(`/purchase-evaluations/new?id=${evaluation.id}`)} className="gap-1.5 text-xs">
                <Pencil className="h-3.5 w-3.5" /> Sửa header
              </Button>
              <Button variant="danger" onClick={onDelete} className="gap-1.5 text-xs">
                <Trash2 className="h-3.5 w-3.5" /> Xóa
              </Button>
            </>
          )}
          <Button variant="ghost" onClick={onBack} className="text-xs">← Đóng</Button>
        </div>
      </div>

      <div className="divide-y divide-slate-200">
        {/* Section 1 — đúng spec form FO-PHIẾU TRÌNH KÝ CHỌN TP/NCC */}
        <Section title="1. Thông tin gói thầu">
          <InfoTab ev={evaluation} readOnly={readOnly} autoEdit={autoEditHeader} />
        </Section>
        <Section title="2. Chọn NCC / TP">
          <ChonNccSection ev={evaluation} readOnly={readOnly} />
        </Section>
        <Section title={`3. NCC / TP tham gia (${evaluation.suppliers.length})`}>
          <SuppliersTab ev={evaluation} readOnly={readOnly} />
        </Section>
        <Section title={`4. Hạng mục + Báo giá (${evaluation.details.length})`}>
          <ItemsTab ev={evaluation} readOnly={readOnly} />
        </Section>
        <Section title="5. Ý kiến 4 phòng ban (sign-off)">
          {mode === 'workspace' && (
            <div className="mb-3 rounded border border-amber-200 bg-amber-50 px-3 py-2 text-[12px] text-amber-800">
              Ý kiến + chữ ký nhập khi duyệt phiếu — vào menu &ldquo;Duyệt&rdquo; để ký.
            </div>
          )}
          <DepartmentOpinionsSection ev={evaluation} readOnly={opinionsReadOnly} />
        </Section>
      </div>
    </div>
  )
}

function Section({ title, children }: { title: string; children: React.ReactNode }) {
  return (
    <section className="px-5 py-4">
      <h3 className="mb-3 text-xs font-semibold uppercase tracking-wide text-slate-500">{title}</h3>
      {children}
    </section>
  )
}

// ===== Section 5 — Ý kiến 4 phòng ban =====
// Render 2x2 grid 4 box (Phê duyệt / CCM / MuaHàng / SM-PM). Mỗi box hiển
// thị Opinion text + chữ ký (UserName + SignedAt) nếu đã ký, hoặc form nhập
// + 2 button "Lưu" + "Lưu & Ký" khi chưa ký / readOnly=false.
function DepartmentOpinionsSection({ ev, readOnly }: { ev: PeDetailBundle; readOnly: boolean }) {
  const KINDS: { kind: number; label: string }[] = [
    { kind: PeDepartmentKind.PheDuyet, label: PeDepartmentKindLabel[PeDepartmentKind.PheDuyet] },
    { kind: PeDepartmentKind.Ccm, label: PeDepartmentKindLabel[PeDepartmentKind.Ccm] },
    { kind: PeDepartmentKind.MuaHang, label: PeDepartmentKindLabel[PeDepartmentKind.MuaHang] },
    { kind: PeDepartmentKind.SmPm, label: PeDepartmentKindLabel[PeDepartmentKind.SmPm] },
  ]
  return (
    <div className="grid grid-cols-1 gap-3 md:grid-cols-2">
      {KINDS.map(k => {
        const existing = ev.departmentOpinions.find(o => o.kind === k.kind) ?? null
        return (
          <OpinionBox
            key={k.kind}
            evaluationId={ev.id}
            kind={k.kind}
            kindLabel={k.label}
            existing={existing}
            readOnly={readOnly}
          />
        )
      })}
    </div>
  )
}

function OpinionBox({
  evaluationId,
  kind,
  kindLabel,
  existing,
  readOnly,
}: {
  evaluationId: string
  kind: number
  kindLabel: string
  existing: PeDepartmentOpinion | null
  readOnly: boolean
}) {
  const qc = useQueryClient()
  const [text, setText] = useState(existing?.opinion ?? '')
  const isSigned = !!existing?.signedAt

  const save = useMutation({
    mutationFn: async (sign: boolean) =>
      api.post(`/purchase-evaluations/${evaluationId}/opinions`, {
        kind,
        opinion: text || null,
        sign,
      }),
    onSuccess: () => {
      toast.success('Đã lưu ý kiến.')
      qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] })
    },
    onError: e => toast.error(getErrorMessage(e)),
  })

  return (
    <div className={cn(
      'rounded-lg border bg-white p-3',
      isSigned ? 'border-emerald-200' : 'border-slate-200',
    )}>
      <div className="mb-2 flex items-center justify-between">
        <h4 className="text-[13px] font-semibold uppercase tracking-wide text-slate-700">{kindLabel}</h4>
        {isSigned && (
          <span className="inline-flex items-center gap-1 rounded-full bg-emerald-100 px-2 py-0.5 text-[10px] font-medium text-emerald-700">
            <Check className="h-3 w-3" /> Đã ký
          </span>
        )}
      </div>

      {readOnly ? (
        <>
          <div className="min-h-[60px] whitespace-pre-wrap text-sm text-slate-800">
            {existing?.opinion ?? <span className="italic text-slate-400">— chưa có ý kiến</span>}
          </div>
          {isSigned && (
            <div className="mt-2 border-t border-slate-100 pt-1.5 text-[11px] text-slate-500">
              Ký bởi <strong>{existing?.userName ?? '—'}</strong> · {new Date(existing!.signedAt!).toLocaleString('vi-VN')}
            </div>
          )}
        </>
      ) : (
        <>
          <textarea
            rows={3}
            value={text}
            onChange={e => setText(e.target.value)}
            placeholder="Nhập ý kiến…"
            className="w-full resize-none rounded border border-slate-200 px-2 py-1.5 text-sm focus:border-brand-300 focus:outline-none focus:ring-1 focus:ring-brand-200"
          />
          <div className="mt-2 flex items-center justify-between gap-2">
            <div className="text-[11px] text-slate-500">
              {isSigned
                ? <>Ký bởi <strong>{existing?.userName ?? '—'}</strong> · {new Date(existing!.signedAt!).toLocaleString('vi-VN')}</>
                : 'Chưa ký'}
            </div>
            <div className="flex gap-1">
              <Button
                variant="ghost"
                onClick={() => save.mutate(false)}
                disabled={save.isPending}
                className="text-xs"
              >
                Lưu text
              </Button>
              <Button
                onClick={() => save.mutate(true)}
                disabled={save.isPending}
                className="text-xs"
              >
                {isSigned ? 'Cập nhật chữ ký' : 'Lưu & Ký'}
              </Button>
            </div>
          </div>
        </>
      )}
    </div>
  )
}

// ===== Exports cho Panel 3 — Approvals history + Changelog =====

export function PeApprovalsSection({ ev }: { ev: PeDetailBundle }) {
  return (
    <div>
      <h3 className="mb-2 text-sm font-semibold text-slate-900">Lịch sử duyệt ({ev.approvals.length})</h3>
      <ApprovalsTab ev={ev} />
    </div>
  )
}

export function PeHistorySection({ ev }: { ev: PeDetailBundle }) {
  return (
    <div>
      <h3 className="mb-2 text-sm font-semibold text-slate-900">Lịch sử thay đổi</h3>
      <HistoryTab ev={ev} />
    </div>
  )
}

// ===== Section 1 — Thông tin gói thầu (spec: a. Tên gói thầu / b. Dự án) =====
// Inline editable khi canEdit (=!readOnly && isDraft). Edit pencil button "Sửa"
// flip display ↔ form mode. Save dùng existing PUT /pe/:id endpoint với current
// entity values + new header fields. Dự án + Type LOCKED sau create — chỉ Tên/
// Địa điểm/Mô tả/Payment editable inline. autoEdit prop cho phép trigger edit
// mode từ pencil icon trong PeListPanel (URL flag ?editHeader=1).
function InfoTab({ ev, readOnly, autoEdit }: { ev: PeDetailBundle; readOnly: boolean; autoEdit: boolean }) {
  const isDraft = ev.phase === PurchaseEvaluationPhase.DangSoanThao
  const canEdit = !readOnly && isDraft
  const qc = useQueryClient()
  const [editing, setEditing] = useState(autoEdit && canEdit)
  const [tenGoiThau, setTenGoiThau] = useState(ev.tenGoiThau)
  const [diaDiem, setDiaDiem] = useState(ev.diaDiem ?? '')
  const [moTa, setMoTa] = useState(ev.moTa ?? '')
  const [paymentTerms, setPaymentTerms] = useState(ev.paymentTerms ?? '')

  const dirty = tenGoiThau !== ev.tenGoiThau
    || diaDiem !== (ev.diaDiem ?? '')
    || moTa !== (ev.moTa ?? '')
    || paymentTerms !== (ev.paymentTerms ?? '')

  const save = useMutation({
    mutationFn: async () => {
      await api.put(`/purchase-evaluations/${ev.id}`, {
        id: ev.id,
        tenGoiThau,
        diaDiem: diaDiem || null,
        moTa: moTa || null,
        paymentTerms: paymentTerms || null,
        budgetId: ev.budgetId,
        budgetManualName: ev.budgetManualName,
        budgetManualAmount: ev.budgetManualAmount,
      })
    },
    onSuccess: () => {
      toast.success('Đã cập nhật thông tin')
      qc.invalidateQueries({ queryKey: ['pe-detail', ev.id] })
      qc.invalidateQueries({ queryKey: ['pe-list'] })
      setEditing(false)
    },
    onError: e => toast.error(getErrorMessage(e)),
  })

  function reset() {
    setTenGoiThau(ev.tenGoiThau)
    setDiaDiem(ev.diaDiem ?? '')
    setMoTa(ev.moTa ?? '')
    setPaymentTerms(ev.paymentTerms ?? '')
  }

  if (!editing) {
    return (
      <dl className="space-y-2 text-sm">
        <div className="flex items-start justify-between">
          <FormRow label="a. Tên gói thầu" value={ev.tenGoiThau} />
          {canEdit && (
            <button
              onClick={() => setEditing(true)}
              className="inline-flex items-center gap-1 rounded px-2 py-1 text-[11px] text-slate-500 hover:bg-slate-100 hover:text-brand-600"
              title="Sửa thông tin gói thầu"
            >
              <Pencil className="h-3 w-3" /> Sửa
            </button>
          )}
        </div>
        <FormRow label="b. Dự án" value={ev.projectName} />
        {(ev.diaDiem || ev.moTa || ev.paymentTerms) && (
          <div className="mt-3 rounded bg-slate-50 px-3 py-2 text-[12px] text-slate-600">
            {ev.diaDiem && <div><span className="text-slate-400">Địa điểm:</span> {ev.diaDiem}</div>}
            {ev.moTa && <div><span className="text-slate-400">Mô tả:</span> {ev.moTa}</div>}
            {ev.paymentTerms && <div><span className="text-slate-400">Điều khoản TT:</span> <span className="whitespace-pre-wrap">{ev.paymentTerms}</span></div>}
          </div>
        )}
      </dl>
    )
  }

  // Editing mode
  return (
    <div className="space-y-3 rounded border border-brand-200 bg-brand-50/30 p-3">
      <div className="grid gap-3 md:grid-cols-2">
        <div className="md:col-span-2">
          <Label className="text-[11px]">a. Tên gói thầu *</Label>
          <Input
            value={tenGoiThau}
            onChange={e => setTenGoiThau(e.target.value)}
            placeholder="vd Cung cấp bê tông"
          />
        </div>
        <div className="md:col-span-2">
          <Label className="text-[11px]">b. Dự án (khóa)</Label>
          <Input value={ev.projectName} disabled className="bg-slate-100" />
        </div>
        <div>
          <Label className="text-[11px]">Địa điểm</Label>
          <Input
            value={diaDiem}
            onChange={e => setDiaDiem(e.target.value)}
            placeholder="Lô K, KCN Lộc An..."
          />
        </div>
        <div>
          <Label className="text-[11px]">Mô tả ngắn</Label>
          <Input
            value={moTa}
            onChange={e => setMoTa(e.target.value)}
            placeholder="Phương án A: ..."
          />
        </div>
        <div className="md:col-span-2">
          <Label className="text-[11px]">Điều khoản thanh toán</Label>
          <Input
            value={paymentTerms}
            onChange={e => setPaymentTerms(e.target.value)}
            placeholder="JSON hoặc text"
          />
        </div>
      </div>
      <div className="flex items-center justify-end gap-2">
        <Button
          variant="ghost"
          onClick={() => { reset(); setEditing(false) }}
          className="h-7 px-3 text-xs"
        >
          Hủy
        </Button>
        <Button
          onClick={() => save.mutate()}
          disabled={!dirty || !tenGoiThau || save.isPending}
          className="h-7 px-3 text-xs"
        >
          {save.isPending ? 'Đang lưu…' : 'Lưu'}
        </Button>
      </div>
    </div>
  )
}

// ===== b. Ngân sách inline editor (Mig 17) =====
// Hiển thị + edit budget link / manual fields ngay trong Section 2 — KHÔNG cần
// đi tới "Sửa header" page. Visible trong cả 3 view (Workspace / Danh sách /
// Duyệt). Edit chỉ enable khi !readOnly + isDraft (Drafter sửa). Read-only
// khi pendingMe=1 hoặc phase đã chuyển khỏi DangSoanThao. Empty values hiển
// thị empty (per user 2026-05-07).
function BudgetFieldRow({ ev, readOnly }: { ev: PeDetailBundle; readOnly: boolean }) {
  const isDraft = ev.phase === PurchaseEvaluationPhase.DangSoanThao
  const canEdit = !readOnly && isDraft
  const qc = useQueryClient()

  // Detect mode khi mount/refresh: prefer manual mode nếu đã có data manual + ko link
  const initialManual = (ev.budgetManualName !== null || ev.budgetManualAmount !== null) && !ev.budgetId
  const [manualMode, setManualMode] = useState(initialManual)
  const [budgetId, setBudgetId] = useState(ev.budgetId ?? '')
  const [manualName, setManualName] = useState(ev.budgetManualName ?? '')
  const [manualAmount, setManualAmount] = useState(ev.budgetManualAmount ?? 0)

  // Eligible budgets — chỉ fetch khi user có khả năng edit
  const eligibleBudgets = useQuery({
    queryKey: ['eligible-budgets', ev.projectId],
    queryFn: async () => (await api.get<Paged<BudgetListItem>>('/budgets', {
      params: { pageSize: 100, projectId: ev.projectId, phase: BudgetPhase.DaDuyet },
    })).data.items,
    enabled: canEdit,
  })

  // Dirty detect — compare current state vs ev original
  const dirty = manualMode !== initialManual
    || (manualMode && (manualName !== (ev.budgetManualName ?? '') || manualAmount !== (ev.budgetManualAmount ?? 0)))
    || (!manualMode && budgetId !== (ev.budgetId ?? ''))

  const save = useMutation({
    mutationFn: async () => {
      const payload = manualMode
        ? { budgetId: null, budgetManualName: manualName || null, budgetManualAmount: manualAmount > 0 ? manualAmount : null }
        : { budgetId: budgetId || null, budgetManualName: null, budgetManualAmount: null }
      await api.put(`/purchase-evaluations/${ev.id}`, {
        id: ev.id,
        tenGoiThau: ev.tenGoiThau,
        diaDiem: ev.diaDiem,
        moTa: ev.moTa,
        paymentTerms: ev.paymentTerms,
        ...payload,
      })
    },
    onSuccess: () => {
      toast.success('Đã cập nhật ngân sách')
      qc.invalidateQueries({ queryKey: ['pe-detail', ev.id] })
      qc.invalidateQueries({ queryKey: ['pe-list'] })
    },
    onError: e => toast.error(getErrorMessage(e)),
  })

  // Read-only mode: chỉ display (không toggle, không edit)
  if (!canEdit) {
    return (
      <FormRow
        label="b. Ngân sách"
        value={ev.budget ? (
          <a href={`/budgets?id=${ev.budget.id}`} className="text-brand-600 hover:underline">
            <span className="font-mono text-[11px]">{ev.budget.maNganSach ?? '—'}</span>
            {' · '}{ev.budget.tenNganSach}
            {' · '}<span className="text-slate-500">{ev.budget.tongNganSach.toLocaleString('vi-VN')} đ</span>
          </a>
        ) : ev.budgetManualAmount != null || ev.budgetManualName ? (
          <span className="text-slate-700">
            {ev.budgetManualName && <span>{ev.budgetManualName}</span>}
            {ev.budgetManualName && ev.budgetManualAmount != null && ' · '}
            {ev.budgetManualAmount != null && (
              <span className="font-semibold text-slate-900">{ev.budgetManualAmount.toLocaleString('vi-VN')} đ</span>
            )}
            <span className="ml-2 rounded bg-slate-100 px-1.5 py-0.5 text-[10px] text-slate-500">nhập tay</span>
          </span>
        ) : <span className="text-slate-400">—</span>}
      />
    )
  }

  // Editable mode (canEdit=true)
  return (
    <div className="flex gap-3">
      <span className="w-44 shrink-0 pt-1.5 text-[12px] text-slate-500">b. Ngân sách</span>
      <div className="min-w-0 flex-1 space-y-2">
        <label className="inline-flex cursor-pointer items-center gap-1.5 text-[11px] text-slate-600">
          <input
            type="checkbox"
            checked={manualMode}
            onChange={e => setManualMode(e.target.checked)}
            className="h-3.5 w-3.5 rounded border-slate-300"
          />
          Nhập tay (không link)
        </label>
        {!manualMode ? (
          <Select
            value={budgetId}
            onChange={e => setBudgetId(e.target.value)}
            className="text-sm"
          >
            <option value="">—</option>
            {eligibleBudgets.data?.map(b => (
              <option key={b.id} value={b.id}>
                {b.maNganSach ?? '—'} · {b.tenNganSach} · {b.tongNganSach.toLocaleString('vi-VN')} đ
              </option>
            ))}
          </Select>
        ) : (
          <div className="grid grid-cols-1 gap-2 md:grid-cols-2">
            <Input
              value={manualName}
              onChange={e => setManualName(e.target.value)}
              placeholder="Tên ngân sách (vd Tạm tính T11/2025)"
              maxLength={200}
              className="text-sm"
            />
            <Input
              type="number"
              min={0}
              value={manualAmount || ''}
              onChange={e => setManualAmount(Number(e.target.value))}
              placeholder="Số tiền (đ)"
              className="text-sm"
            />
          </div>
        )}
        {dirty && (
          <div className="flex items-center gap-2">
            <Button
              onClick={() => save.mutate()}
              disabled={save.isPending}
              className="h-7 px-3 text-xs"
            >
              {save.isPending ? 'Đang lưu…' : 'Lưu ngân sách'}
            </Button>
            <button
              onClick={() => {
                setManualMode(initialManual)
                setBudgetId(ev.budgetId ?? '')
                setManualName(ev.budgetManualName ?? '')
                setManualAmount(ev.budgetManualAmount ?? 0)
              }}
              className="text-[11px] text-slate-500 hover:text-slate-700"
            >
              Hủy thay đổi
            </button>
          </div>
        )}
      </div>
    </div>
  )
}

// ===== Section 2 — Chọn NCC/TP (spec: a/b/c/d) =====
function ChonNccSection({ ev, readOnly = false }: { ev: PeDetailBundle; readOnly?: boolean }) {
  const canCreateContract = !readOnly && ev.phase === PurchaseEvaluationPhase.DaDuyet && !ev.contractId && ev.selectedSupplierId
  const [createOpen, setCreateOpen] = useState(false)

  // c. Giá chào thầu = sum quotes của NCC được chọn (winner)
  const winnerSupplierRowId = ev.selectedSupplierId
    ? ev.suppliers.find(s => s.supplierId === ev.selectedSupplierId)?.id ?? null
    : null
  const giaChaoThau = winnerSupplierRowId
    ? ev.details
        .flatMap(d => d.quotes)
        .filter(q => q.purchaseEvaluationSupplierId === winnerSupplierRowId)
        .reduce((sum, q) => sum + q.thanhTien, 0)
    : null

  // d. Bản so sánh — attachments với purpose=ComparisonTable hoặc supplier-row null
  const banSoSanhAttachments = ev.attachments.filter(
    a => a.purchaseEvaluationSupplierId === null,
  )

  return (
    <div className="space-y-3">
      <FormRow
        label="a. NCC / TP được chọn"
        value={ev.selectedSupplierName ? (
          <span className="font-medium text-emerald-700">✓ {ev.selectedSupplierName}</span>
        ) : <span className="text-slate-400">— (chưa chọn)</span>}
      />
      <BudgetFieldRow ev={ev} readOnly={readOnly} />
      <FormRow
        label="c. Giá chào thầu"
        value={giaChaoThau != null ? (
          <span className="font-semibold text-slate-900">{giaChaoThau.toLocaleString('vi-VN')} đ</span>
        ) : <span className="text-slate-400">— (chưa chọn NCC / chưa nhập báo giá)</span>}
      />
      <div>
        <div className="flex gap-3">
          <span className="w-44 shrink-0 text-[12px] text-slate-500">d. Bản so sánh</span>
          <div className="min-w-0 flex-1">
            <GeneralAttachmentsSection
              evaluationId={ev.id}
              attachments={banSoSanhAttachments}
              readOnly={readOnly}
            />
          </div>
        </div>
      </div>

      {ev.paymentTerms && (
        <FormRow label="Điều khoản thanh toán" value={<span className="whitespace-pre-wrap">{ev.paymentTerms}</span>} />
      )}
      {ev.contractId && (
        <FormRow
          label="HĐ kế thừa"
          value={<a href={`/contracts/${ev.contractId}`} className="text-brand-600 hover:underline">✓ Xem HĐ</a>}
        />
      )}

      {canCreateContract && (
        <div className="rounded border border-emerald-200 bg-emerald-50 p-3">
          <div className="flex items-center justify-between gap-3">
            <div className="text-sm text-emerald-800">
              ✓ Phiếu đã duyệt. Bấm để tạo HĐ mới kế thừa NCC + hạng mục.
            </div>
            <Button onClick={() => setCreateOpen(true)} className="gap-1.5 text-xs">
              <Plus className="h-3.5 w-3.5" /> Tạo HĐ từ phiếu
            </Button>
          </div>
        </div>
      )}
      {createOpen && <CreateContractDialog evaluation={ev} onClose={() => setCreateOpen(false)} />}
    </div>
  )
}

// Form row: label cố định 176px (w-44) bên trái + value bên phải (giống spec).
function FormRow({ label, value }: { label: string; value: React.ReactNode }) {
  return (
    <div className="flex items-baseline gap-3 border-b border-dotted border-slate-200 pb-1.5">
      <dt className="w-44 shrink-0 text-[12px] text-slate-500">{label}</dt>
      <dd className="min-w-0 flex-1 text-slate-800">{value}</dd>
    </div>
  )
}

function CreateContractDialog({ evaluation, onClose }: { evaluation: PeDetailBundle; onClose: () => void }) {
  const navigate = useNavigate()
  const [form, setForm] = useState({
    contractType: 1,
    tenHopDong: evaluation.tenGoiThau,
    bypassProcurementAndCCM: false,
  })
  const mut = useMutation({
    mutationFn: async () =>
      api.post<{ contractId: string }>(`/purchase-evaluations/${evaluation.id}/create-contract`, form),
    onSuccess: res => {
      toast.success('Đã tạo HĐ từ phiếu.')
      navigate(`/contracts/${res.data.contractId}`)
    },
    onError: e => toast.error(getErrorMessage(e)),
  })
  const typeOptions = [
    [1, 'HĐ Thầu phụ'],
    [2, 'HĐ Giao khoán'],
    [3, 'HĐ Nhà cung cấp'],
    [4, 'HĐ Dịch vụ'],
    [5, 'HĐ Mua bán'],
    [6, 'HĐ Nguyên tắc NCC'],
    [7, 'HĐ Nguyên tắc DV'],
  ] as const
  return (
    <Dialog
      open
      onClose={onClose}
      title="Tạo HĐ từ phiếu Duyệt NCC"
      footer={<>
        <Button variant="ghost" onClick={onClose}>Hủy</Button>
        <Button onClick={() => mut.mutate()} disabled={mut.isPending}>Tạo</Button>
      </>}
    >
      <div className="space-y-3">
        <p className="text-sm text-slate-500">
          NCC: <strong>{evaluation.selectedSupplierName}</strong> · Dự án: {evaluation.projectName}
        </p>
        <div>
          <Label>Loại HĐ</Label>
          <Select value={form.contractType} onChange={e => setForm({ ...form, contractType: Number(e.target.value) })}>
            {typeOptions.map(([v, lbl]) => <option key={v} value={v}>{lbl}</option>)}
          </Select>
        </div>
        <div>
          <Label>Tên HĐ</Label>
          <Input value={form.tenHopDong} onChange={e => setForm({ ...form, tenHopDong: e.target.value })} />
        </div>
        <label className="flex items-center gap-2 text-sm">
          <input
            type="checkbox"
            checked={form.bypassProcurementAndCCM}
            onChange={e => setForm({ ...form, bypassProcurementAndCCM: e.target.checked })}
          />
          Bypass CCM (áp dụng HĐ với Chủ đầu tư)
        </label>
      </div>
    </Dialog>
  )
}

// ===== Tab: NCC =====
function SuppliersTab({ ev, readOnly = false }: { ev: PeDetailBundle; readOnly?: boolean }) {
  const qc = useQueryClient()
  const [open, setOpen] = useState(false)
  const [editRow, setEditRow] = useState<PeSupplier | null>(null)

  const remove = useMutation({
    mutationFn: async (rowId: string) => api.delete(`/purchase-evaluations/${ev.id}/suppliers/${rowId}`),
    onSuccess: () => { toast.success('Đã xóa NCC.'); qc.invalidateQueries({ queryKey: ['pe-detail', ev.id] }) },
    onError: e => toast.error(getErrorMessage(e)),
  })
  const setWinner = useMutation({
    mutationFn: async (supplierId: string) =>
      api.post(`/purchase-evaluations/${ev.id}/select-winner`, { supplierId }),
    onSuccess: () => { toast.success('Đã chọn NCC thắng.'); qc.invalidateQueries({ queryKey: ['pe-detail', ev.id] }) },
    onError: e => toast.error(getErrorMessage(e)),
  })

  return (
    <div>
      {!readOnly && (
        <div className="mb-3 flex justify-end">
          <Button onClick={() => setOpen(true)} className="gap-1.5 text-xs">
            <Plus className="h-3.5 w-3.5" /> Thêm NCC
          </Button>
        </div>
      )}
      {ev.suppliers.length === 0 ? (
        <p className="text-sm text-slate-500">
          {readOnly ? 'Chưa có NCC.' : 'Chưa có NCC. Thêm NCC để bắt đầu so sánh giá.'}
        </p>
      ) : (
        <div className="overflow-x-auto">
          <table className="min-w-full text-sm">
            <thead className="bg-slate-50 text-xs uppercase text-slate-500">
              <tr>
                <th className="px-3 py-2 text-left">NCC</th>
                <th className="px-3 py-2 text-left">Liên hệ</th>
                <th className="px-3 py-2 text-left">Điều khoản TT</th>
                <th className="px-3 py-2 text-left">File đính kèm</th>
                {!readOnly && <th className="px-3 py-2"></th>}
              </tr>
            </thead>
            <tbody className="divide-y divide-slate-100">
              {ev.suppliers.map(s => (
                <tr key={s.id} className={cn('align-top', ev.selectedSupplierId === s.supplierId && 'bg-emerald-50')}>
                  <td className="px-3 py-2">
                    <div className="font-medium text-slate-900">{s.supplierName}</div>
                    {s.displayName && <div className="text-[11px] text-slate-500">{s.displayName}</div>}
                    {s.note && <div className="mt-0.5 text-[11px] text-amber-600">{s.note}</div>}
                    {readOnly && ev.selectedSupplierId === s.supplierId && (
                      <div className="mt-0.5 text-[11px] font-medium text-emerald-700">✓ NCC được chọn</div>
                    )}
                  </td>
                  <td className="px-3 py-2 text-[12px] text-slate-600">
                    {s.contactName && <div>{s.contactName}</div>}
                    {s.contactPhone && <div>{s.contactPhone}</div>}
                    {s.contactEmail && <div className="truncate">{s.contactEmail}</div>}
                  </td>
                  <td className="px-3 py-2">{s.paymentTermText ?? '—'}</td>
                  <td className="px-3 py-2">
                    <SupplierAttachmentsCell
                      evaluationId={ev.id}
                      supplierRowId={s.id}
                      attachments={ev.attachments.filter(a => a.purchaseEvaluationSupplierId === s.id)}
                      readOnly={readOnly}
                    />
                  </td>
                  {!readOnly && (
                    <td className="px-3 py-2">
                      <div className="flex justify-end gap-1">
                        <button
                          onClick={() => setWinner.mutate(s.supplierId)}
                          className={cn(
                            'rounded px-1.5 py-0.5 text-[11px]',
                            ev.selectedSupplierId === s.supplierId
                              ? 'bg-emerald-100 text-emerald-700'
                              : 'text-slate-500 hover:bg-emerald-50 hover:text-emerald-700',
                          )}
                          title="Chọn NCC thắng"
                        >
                          <Check className="h-3.5 w-3.5" />
                        </button>
                        <button
                          onClick={() => setEditRow(s)}
                          className="rounded px-1.5 py-0.5 text-slate-500 hover:bg-slate-100"
                          title="Sửa"
                        >
                          <Pencil className="h-3.5 w-3.5" />
                        </button>
                        <button
                          onClick={() => { if (confirm('Xóa NCC này khỏi phiếu?')) remove.mutate(s.id) }}
                          className="rounded px-1.5 py-0.5 text-red-500 hover:bg-red-50"
                          title="Xóa"
                        >
                          <Trash2 className="h-3.5 w-3.5" />
                        </button>
                      </div>
                    </td>
                  )}
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      )}

      {open && <AddSupplierDialog evaluationId={ev.id} onClose={() => setOpen(false)} />}
      {editRow && <EditSupplierDialog evaluationId={ev.id} row={editRow} onClose={() => setEditRow(null)} />}
    </div>
  )
}

function AddSupplierDialog({ evaluationId, onClose }: { evaluationId: string; onClose: () => void }) {
  const qc = useQueryClient()
  const suppliers = useQuery({
    queryKey: ['all-suppliers'],
    queryFn: async () => (await api.get<{ items: Supplier[] }>('/suppliers', { params: { pageSize: 1000 } })).data.items,
  })
  const [form, setForm] = useState({
    supplierId: '',
    displayName: '',
    contactName: '',
    contactEmail: '',
    contactPhone: '',
    paymentTermText: '',
    note: '',
  })
  const mut = useMutation({
    mutationFn: async () => api.post(`/purchase-evaluations/${evaluationId}/suppliers`, form),
    onSuccess: () => { toast.success('Đã thêm NCC.'); qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] }); onClose() },
    onError: e => toast.error(getErrorMessage(e)),
  })

  return (
    <Dialog
      open
      onClose={onClose}
      title="Thêm NCC vào phiếu"
      footer={<>
        <Button variant="ghost" onClick={onClose}>Hủy</Button>
        <Button onClick={() => mut.mutate()} disabled={!form.supplierId || mut.isPending}>Thêm</Button>
      </>}
    >
      <div className="space-y-3">
        <div>
          <Label>NCC (master)</Label>
          <Select value={form.supplierId} onChange={e => setForm({ ...form, supplierId: e.target.value })}>
            <option value="">-- Chọn --</option>
            {suppliers.data?.map(s => (
              <option key={s.id} value={s.id}>{s.code} — {s.name}</option>
            ))}
          </Select>
        </div>
        <div className="grid grid-cols-2 gap-3">
          <div><Label>Hiển thị</Label><Input value={form.displayName} onChange={e => setForm({ ...form, displayName: e.target.value })} placeholder="vd TGN-30 ngày" /></div>
          <div><Label>Điều khoản TT</Label><Input value={form.paymentTermText} onChange={e => setForm({ ...form, paymentTermText: e.target.value })} placeholder="vd 30 ngày, 300tr" /></div>
          <div><Label>Người liên hệ</Label><Input value={form.contactName} onChange={e => setForm({ ...form, contactName: e.target.value })} /></div>
          <div><Label>Điện thoại</Label><Input value={form.contactPhone} onChange={e => setForm({ ...form, contactPhone: e.target.value })} /></div>
          <div className="col-span-2"><Label>Email</Label><Input value={form.contactEmail} onChange={e => setForm({ ...form, contactEmail: e.target.value })} /></div>
          <div className="col-span-2"><Label>Ghi chú</Label><Input value={form.note} onChange={e => setForm({ ...form, note: e.target.value })} placeholder="ĐÃ CHỐT SO SÁNH LẦN 1 / ĐÀM PHÁN THÊM..." /></div>
        </div>
      </div>
    </Dialog>
  )
}

function EditSupplierDialog({ evaluationId, row, onClose }: { evaluationId: string; row: PeSupplier; onClose: () => void }) {
  const qc = useQueryClient()
  const [form, setForm] = useState({
    supplierId: row.supplierId,
    displayName: row.displayName ?? '',
    contactName: row.contactName ?? '',
    contactEmail: row.contactEmail ?? '',
    contactPhone: row.contactPhone ?? '',
    paymentTermText: row.paymentTermText ?? '',
    note: row.note ?? '',
  })
  const mut = useMutation({
    mutationFn: async () => api.put(`/purchase-evaluations/${evaluationId}/suppliers/${row.id}`, form),
    onSuccess: () => { toast.success('Đã cập nhật.'); qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] }); onClose() },
    onError: e => toast.error(getErrorMessage(e)),
  })
  return (
    <Dialog
      open
      onClose={onClose}
      title={`Sửa NCC — ${row.supplierName}`}
      footer={<>
        <Button variant="ghost" onClick={onClose}>Hủy</Button>
        <Button onClick={() => mut.mutate()} disabled={mut.isPending}>Lưu</Button>
      </>}
    >
      <div className="grid grid-cols-2 gap-3">
        <div><Label>Hiển thị</Label><Input value={form.displayName} onChange={e => setForm({ ...form, displayName: e.target.value })} /></div>
        <div><Label>Điều khoản TT</Label><Input value={form.paymentTermText} onChange={e => setForm({ ...form, paymentTermText: e.target.value })} /></div>
        <div><Label>Liên hệ</Label><Input value={form.contactName} onChange={e => setForm({ ...form, contactName: e.target.value })} /></div>
        <div><Label>Điện thoại</Label><Input value={form.contactPhone} onChange={e => setForm({ ...form, contactPhone: e.target.value })} /></div>
        <div className="col-span-2"><Label>Email</Label><Input value={form.contactEmail} onChange={e => setForm({ ...form, contactEmail: e.target.value })} /></div>
        <div className="col-span-2"><Label>Ghi chú</Label><Input value={form.note} onChange={e => setForm({ ...form, note: e.target.value })} /></div>
      </div>
    </Dialog>
  )
}

// ===== Tab: Hạng mục + Báo giá (matrix) =====
function ItemsTab({ ev, readOnly = false }: { ev: PeDetailBundle; readOnly?: boolean }) {
  const qc = useQueryClient()
  const [addOpen, setAddOpen] = useState(false)
  const [editDetail, setEditDetail] = useState<PeDetailRow | null>(null)
  const [quoteEdit, setQuoteEdit] = useState<{ detail: PeDetailRow; supplier: PeSupplier; existing: PeQuote | null } | null>(null)

  const removeDetail = useMutation({
    mutationFn: async (id: string) => api.delete(`/purchase-evaluations/${ev.id}/details/${id}`),
    onSuccess: () => { toast.success('Đã xóa hạng mục.'); qc.invalidateQueries({ queryKey: ['pe-detail', ev.id] }) },
    onError: e => toast.error(getErrorMessage(e)),
  })

  const quoteKey = (detailId: string, supplierRowId: string) =>
    ev.details.find(d => d.id === detailId)?.quotes.find(q => q.purchaseEvaluationSupplierId === supplierRowId) ?? null

  // Budget comparison — fetch full Budget bundle nếu có link để so sánh per-row.
  // Match key: groupCode|itemCode (case-sensitive match; itemCode null cho phép).
  const budgetBundle = useQuery({
    queryKey: ['budget-detail-for-pe', ev.budgetId],
    queryFn: async () => (await api.get<{ details: { groupCode: string; itemCode: string | null; thanhTien: number }[]; tongNganSach: number }>(
      `/budgets/${ev.budgetId}`)).data,
    enabled: !!ev.budgetId,
  })
  const budgetRowMap = (() => {
    const m = new Map<string, number>()
    budgetBundle.data?.details.forEach(d => {
      m.set(`${d.groupCode}|${d.itemCode ?? ''}`, d.thanhTien)
    })
    return m
  })()
  const showBudgetCol = !!ev.budgetId
  const totalPeNganSach = ev.details.reduce((sum, d) => sum + d.thanhTienNganSach, 0)
  const totalBudget = budgetBundle.data?.tongNganSach ?? 0

  return (
    <div>
      <div className="mb-3 flex items-center justify-between">
        <p className="text-xs text-slate-500">
          {ev.suppliers.length === 0
            ? (readOnly ? 'Chưa có NCC tham gia.' : 'Thêm NCC ở tab "NCC" trước khi nhập báo giá.')
            : readOnly
              ? `${ev.details.length} hạng mục × ${ev.suppliers.length} NCC`
              : `${ev.details.length} hạng mục × ${ev.suppliers.length} NCC — click ô để nhập báo giá.`}
        </p>
        {!readOnly && (
          <Button onClick={() => setAddOpen(true)} className="gap-1.5 text-xs">
            <Plus className="h-3.5 w-3.5" /> Thêm hạng mục
          </Button>
        )}
      </div>

      {ev.details.length === 0 ? (
        <p className="text-sm text-slate-500">Chưa có hạng mục.</p>
      ) : (
        <div className="overflow-x-auto">
          <table className="min-w-full border border-slate-200 text-xs">
            <thead className="bg-slate-50 text-slate-600">
              <tr>
                <th className="sticky left-0 z-10 border-r border-slate-200 bg-slate-50 px-2 py-2 text-left">Hạng mục</th>
                <th className="border-r border-slate-200 px-2 py-2 text-right">KL</th>
                <th className="border-r border-slate-200 px-2 py-2 text-right">ĐG ngân sách</th>
                <th className="border-r border-slate-200 px-2 py-2 text-right">TT ngân sách</th>
                {showBudgetCol && (
                  <th className="border-r border-slate-200 bg-amber-50 px-2 py-2 text-right" title="So với ngân sách đã link">
                    NS link · Δ
                  </th>
                )}
                {ev.suppliers.map(s => (
                  <th key={s.id} className="border-r border-slate-200 px-2 py-2 text-right">
                    {s.displayName ?? s.supplierName}
                  </th>
                ))}
                {!readOnly && <th className="px-2 py-2"></th>}
              </tr>
            </thead>
            <tbody className="divide-y divide-slate-100">
              {ev.details.map(d => (
                <tr key={d.id}>
                  <td className="sticky left-0 z-10 border-r border-slate-200 bg-white px-2 py-2">
                    <div className="font-medium text-slate-900">{d.groupCode} {d.noiDung}</div>
                    <div className="text-[10px] text-slate-500">{d.groupName} · {d.donViTinh ?? ''}</div>
                  </td>
                  <td className="border-r border-slate-200 px-2 py-2 text-right font-mono">{d.khoiLuongNganSach}</td>
                  <td className="border-r border-slate-200 px-2 py-2 text-right font-mono">{fmtMoney(d.donGiaNganSach)}</td>
                  <td className="border-r border-slate-200 px-2 py-2 text-right font-mono">{fmtMoney(d.thanhTienNganSach)}</td>
                  {showBudgetCol && (() => {
                    const bgValue = budgetRowMap.get(`${d.groupCode}|${d.itemCode ?? ''}`)
                    if (bgValue == null)
                      return <td className="border-r border-slate-200 bg-amber-50/40 px-2 py-2 text-right text-slate-300">—</td>
                    const delta = d.thanhTienNganSach - bgValue
                    return (
                      <td
                        className={cn(
                          'border-r border-slate-200 bg-amber-50/40 px-2 py-2 text-right font-mono',
                          delta > 0 && 'text-red-600',
                          delta < 0 && 'text-emerald-600',
                          delta === 0 && 'text-slate-500',
                        )}
                        title={`Ngân sách: ${fmtMoney(bgValue)} · Δ ${delta > 0 ? '+' : ''}${fmtMoney(delta)}`}
                      >
                        {fmtMoney(bgValue)}
                        <div className="text-[10px]">{delta === 0 ? '=' : (delta > 0 ? `+${fmtMoney(delta)}` : fmtMoney(delta))}</div>
                      </td>
                    )
                  })()}
                  {ev.suppliers.map(s => {
                    const q = quoteKey(d.id, s.id)
                    return (
                      <td
                        key={s.id}
                        onClick={readOnly ? undefined : () => setQuoteEdit({ detail: d, supplier: s, existing: q })}
                        className={cn(
                          'border-r border-slate-200 px-2 py-2 text-right font-mono transition',
                          !readOnly && 'cursor-pointer hover:bg-brand-50',
                          q?.isSelected && 'bg-emerald-50 font-semibold text-emerald-700',
                        )}
                      >
                        {q ? fmtMoney(q.thanhTien) : <span className="text-slate-300">—</span>}
                      </td>
                    )
                  })}
                  {!readOnly && (
                    <td className="px-2 py-2">
                      <div className="flex gap-1">
                        <button onClick={() => setEditDetail(d)} className="rounded px-1 py-0.5 text-slate-500 hover:bg-slate-100">
                          <Pencil className="h-3 w-3" />
                        </button>
                        <button onClick={() => { if (confirm('Xóa hạng mục?')) removeDetail.mutate(d.id) }} className="rounded px-1 py-0.5 text-red-500 hover:bg-red-50">
                          <Trash2 className="h-3 w-3" />
                        </button>
                      </div>
                    </td>
                  )}
                </tr>
              ))}
            </tbody>
            {showBudgetCol && (
              <tfoot className="border-t-2 border-slate-300 bg-slate-50 text-xs font-semibold">
                <tr>
                  <td className="sticky left-0 z-10 border-r border-slate-200 bg-slate-50 px-2 py-2 text-right">Tổng:</td>
                  <td className="border-r border-slate-200"></td>
                  <td className="border-r border-slate-200"></td>
                  <td className="border-r border-slate-200 px-2 py-2 text-right font-mono">{fmtMoney(totalPeNganSach)}</td>
                  <td className="border-r border-slate-200 bg-amber-50 px-2 py-2 text-right font-mono">
                    {fmtMoney(totalBudget)}
                    {(() => {
                      const delta = totalPeNganSach - totalBudget
                      return (
                        <div className={cn(
                          'text-[10px]',
                          delta > 0 && 'text-red-600',
                          delta < 0 && 'text-emerald-600',
                          delta === 0 && 'text-slate-500',
                        )}>
                          {delta === 0 ? 'khớp ngân sách' : delta > 0 ? `vượt +${fmtMoney(delta)}` : `dưới ${fmtMoney(delta)}`}
                        </div>
                      )
                    })()}
                  </td>
                  {ev.suppliers.map(s => <td key={s.id} className="border-r border-slate-200" />)}
                  {!readOnly && <td />}
                </tr>
              </tfoot>
            )}
          </table>
        </div>
      )}

      {addOpen && <DetailDialog evaluationId={ev.id} row={null} onClose={() => setAddOpen(false)} />}
      {editDetail && <DetailDialog evaluationId={ev.id} row={editDetail} onClose={() => setEditDetail(null)} />}
      {quoteEdit && (
        <QuoteDialog
          evaluationId={ev.id}
          detailId={quoteEdit.detail.id}
          supplierRowId={quoteEdit.supplier.id}
          supplierName={quoteEdit.supplier.supplierName}
          itemName={quoteEdit.detail.noiDung}
          khoiLuong={quoteEdit.detail.khoiLuongThiCong || quoteEdit.detail.khoiLuongNganSach}
          existing={quoteEdit.existing}
          onClose={() => setQuoteEdit(null)}
        />
      )}
    </div>
  )
}

function DetailDialog({ evaluationId, row, onClose }: { evaluationId: string; row: PeDetailRow | null; onClose: () => void }) {
  const qc = useQueryClient()
  const [form, setForm] = useState({
    groupCode: row?.groupCode ?? 'A.I',
    groupName: row?.groupName ?? '',
    itemCode: row?.itemCode ?? '',
    noiDung: row?.noiDung ?? '',
    donViTinh: row?.donViTinh ?? '',
    khoiLuongNganSach: row?.khoiLuongNganSach ?? 0,
    khoiLuongThiCong: row?.khoiLuongThiCong ?? 0,
    donGiaNganSach: row?.donGiaNganSach ?? 0,
    thanhTienNganSach: row?.thanhTienNganSach ?? 0,
    ghiChu: row?.ghiChu ?? '',
  })
  const mut = useMutation({
    mutationFn: async () =>
      row
        ? api.put(`/purchase-evaluations/${evaluationId}/details/${row.id}`, form)
        : api.post(`/purchase-evaluations/${evaluationId}/details`, form),
    onSuccess: () => { toast.success(row ? 'Đã sửa.' : 'Đã thêm.'); qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] }); onClose() },
    onError: e => toast.error(getErrorMessage(e)),
  })

  const updateAndRecalc = (patch: Partial<typeof form>) => {
    const next = { ...form, ...patch }
    // Auto-compute ThanhTien = KL ngân sách × ĐG ngân sách
    next.thanhTienNganSach = Number(next.khoiLuongNganSach) * Number(next.donGiaNganSach)
    setForm(next)
  }

  return (
    <Dialog
      open
      onClose={onClose}
      title={(row ? 'Sửa' : 'Thêm') + ' hạng mục'}
      size="lg"
      footer={<>
        <Button variant="ghost" onClick={onClose}>Hủy</Button>
        <Button onClick={() => mut.mutate()} disabled={mut.isPending}>{row ? 'Lưu' : 'Thêm'}</Button>
      </>}
    >
      <div className="space-y-3">
        <div className="grid grid-cols-3 gap-3">
          <div><Label>Nhóm (A.I/A.II...)</Label><Input value={form.groupCode} onChange={e => setForm({ ...form, groupCode: e.target.value })} /></div>
          <div className="col-span-2"><Label>Tên nhóm</Label><Input value={form.groupName} onChange={e => setForm({ ...form, groupName: e.target.value })} placeholder="Bê tông / Phụ gia..." /></div>
          <div><Label>Mã (tùy chọn)</Label><Input value={form.itemCode} onChange={e => setForm({ ...form, itemCode: e.target.value })} /></div>
          <div className="col-span-2"><Label>Nội dung</Label><Input value={form.noiDung} onChange={e => setForm({ ...form, noiDung: e.target.value })} /></div>
          <div><Label>ĐVT</Label><Input value={form.donViTinh} onChange={e => setForm({ ...form, donViTinh: e.target.value })} /></div>
          <div><Label>KL ngân sách</Label><Input type="number" value={form.khoiLuongNganSach} onChange={e => updateAndRecalc({ khoiLuongNganSach: Number(e.target.value) })} /></div>
          <div><Label>KL thi công</Label><Input type="number" value={form.khoiLuongThiCong} onChange={e => setForm({ ...form, khoiLuongThiCong: Number(e.target.value) })} /></div>
          <div><Label>Đơn giá ngân sách</Label><Input type="number" value={form.donGiaNganSach} onChange={e => updateAndRecalc({ donGiaNganSach: Number(e.target.value) })} /></div>
          <div className="col-span-2"><Label>Thành tiền ngân sách (auto)</Label><Input type="number" value={form.thanhTienNganSach} onChange={e => setForm({ ...form, thanhTienNganSach: Number(e.target.value) })} /></div>
          <div className="col-span-3"><Label>Ghi chú</Label><Input value={form.ghiChu} onChange={e => setForm({ ...form, ghiChu: e.target.value })} /></div>
        </div>
      </div>
    </Dialog>
  )
}

function QuoteDialog({
  evaluationId, detailId, supplierRowId, supplierName, itemName, khoiLuong, existing, onClose,
}: {
  evaluationId: string
  detailId: string
  supplierRowId: string
  supplierName: string
  itemName: string
  khoiLuong: number
  existing: PeQuote | null
  onClose: () => void
}) {
  const qc = useQueryClient()
  const [form, setForm] = useState({
    bgVat: existing?.bgVat ?? 0,
    chuaVat: existing?.chuaVat ?? 0,
    thanhTien: existing?.thanhTien ?? 0,
    isSelected: existing?.isSelected ?? false,
    note: existing?.note ?? '',
  })

  const updateAndRecalc = (patch: Partial<typeof form>) => {
    const next = { ...form, ...patch }
    next.thanhTien = Number(next.chuaVat) * khoiLuong
    setForm(next)
  }

  const mut = useMutation({
    mutationFn: async () =>
      api.post(`/purchase-evaluations/${evaluationId}/quotes`, {
        purchaseEvaluationDetailId: detailId,
        purchaseEvaluationSupplierId: supplierRowId,
        ...form,
      }),
    onSuccess: () => { toast.success('Đã lưu báo giá.'); qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] }); onClose() },
    onError: e => toast.error(getErrorMessage(e)),
  })
  const del = useMutation({
    mutationFn: async () =>
      existing ? api.delete(`/purchase-evaluations/${evaluationId}/quotes/${existing.id}`) : Promise.resolve(),
    onSuccess: () => { toast.success('Đã xóa báo giá.'); qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] }); onClose() },
    onError: e => toast.error(getErrorMessage(e)),
  })

  return (
    <Dialog
      open
      onClose={onClose}
      title={`Báo giá — ${supplierName}`}
      footer={<>
        {existing && <Button variant="danger" onClick={() => del.mutate()} disabled={del.isPending}>Xóa</Button>}
        <Button variant="ghost" onClick={onClose}>Hủy</Button>
        <Button onClick={() => mut.mutate()} disabled={mut.isPending}>Lưu</Button>
      </>}
    >
      <div className="space-y-3">
        <p className="text-sm text-slate-500">Hạng mục: <strong>{itemName}</strong> · KL {khoiLuong}</p>
        <div className="grid grid-cols-3 gap-3">
          <div><Label>Đơn giá chưa VAT</Label><Input type="number" value={form.chuaVat} onChange={e => updateAndRecalc({ chuaVat: Number(e.target.value) })} /></div>
          <div><Label>Đơn giá có VAT</Label><Input type="number" value={form.bgVat} onChange={e => setForm({ ...form, bgVat: Number(e.target.value) })} /></div>
          <div><Label>Thành tiền (auto)</Label><Input type="number" value={form.thanhTien} onChange={e => setForm({ ...form, thanhTien: Number(e.target.value) })} /></div>
        </div>
        <label className="flex items-center gap-2 text-sm">
          <input type="checkbox" checked={form.isSelected} onChange={e => setForm({ ...form, isSelected: e.target.checked })} />
          Chọn NCC này cho hạng mục
        </label>
        <div><Label>Ghi chú</Label><Input value={form.note} onChange={e => setForm({ ...form, note: e.target.value })} /></div>
      </div>
    </Dialog>
  )
}

// ===== Tab: Duyệt =====
function ApprovalsTab({ ev }: { ev: PeDetailBundle }) {
  if (ev.approvals.length === 0) return <p className="text-sm text-slate-500">Chưa có bước duyệt nào.</p>
  return (
    <ol className="space-y-2">
      {ev.approvals.map(a => (
        <li key={a.id} className="rounded border border-slate-200 bg-white p-3 text-sm">
          <div className="flex items-center justify-between">
            <div>
              <span className={cn('rounded px-1.5 py-0.5 text-[11px]', PurchaseEvaluationPhaseColor[a.fromPhase])}>
                {PurchaseEvaluationPhaseLabel[a.fromPhase]}
              </span>
              <span className="mx-2">→</span>
              <span className={cn('rounded px-1.5 py-0.5 text-[11px]', PurchaseEvaluationPhaseColor[a.toPhase])}>
                {PurchaseEvaluationPhaseLabel[a.toPhase]}
              </span>
            </div>
            <span className="text-xs text-slate-500">{new Date(a.approvedAt).toLocaleString('vi-VN')}</span>
          </div>
          <div className="mt-1 text-xs text-slate-500">
            {a.approverName ?? 'Hệ thống'}{a.comment && ` · ${a.comment}`}
          </div>
        </li>
      ))}
    </ol>
  )
}

// ===== Tab: Lịch sử =====
function HistoryTab({ ev }: { ev: PeDetailBundle }) {
  const logs = useQuery({
    queryKey: ['pe-changelog', ev.id],
    queryFn: async () => (await api.get<PeChangelog[]>(`/purchase-evaluations/${ev.id}/changelogs`)).data,
  })
  if (logs.isLoading) return <p className="text-sm text-slate-500">Đang tải…</p>
  if (!logs.data || logs.data.length === 0) return <p className="text-sm text-slate-500">Chưa có lịch sử.</p>
  return (
    <ol className="space-y-1.5 text-sm">
      {logs.data.map(l => (
        <li key={l.id} className="border-l-2 border-slate-200 pl-3 py-1">
          <div className="flex items-center justify-between text-xs text-slate-500">
            <span>{l.userName ?? 'Hệ thống'}</span>
            <span>{new Date(l.createdAt).toLocaleString('vi-VN')}</span>
          </div>
          <div className="text-slate-800">{l.summary}</div>
          {l.contextNote && <div className="text-xs text-slate-500">{l.contextNote}</div>}
        </li>
      ))}
    </ol>
  )
}

// ===== Cell upload file đính kèm per-NCC =====
// 1 row = 1 NCC. User upload file báo giá (purpose=QuoteDocument mặc định) →
// POST multipart với supplierRowId. List N file hiện có + Download/Delete inline.
// Storage path: wwwroot/uploads/purchase-evaluations/{id}/{attId}_{safeName}
function SupplierAttachmentsCell({
  evaluationId,
  supplierRowId,
  attachments,
  readOnly = false,
}: {
  evaluationId: string
  supplierRowId: string
  attachments: PeAttachment[]
  readOnly?: boolean
}) {
  const qc = useQueryClient()
  const fileInputRef = useRef<HTMLInputElement>(null)

  const upload = useMutation({
    mutationFn: async (file: File) => {
      const fd = new FormData()
      fd.append('file', file)
      fd.append('supplierRowId', supplierRowId)
      fd.append('purpose', String(PeAttachmentPurpose.QuoteDocument))
      return api.post(`/purchase-evaluations/${evaluationId}/attachments`, fd, {
        headers: { 'Content-Type': 'multipart/form-data' },
      })
    },
    onSuccess: () => {
      toast.success('Đã tải lên.')
      qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] })
    },
    onError: e => toast.error(getErrorMessage(e)),
  })

  const del = useMutation({
    mutationFn: async (attId: string) =>
      api.delete(`/purchase-evaluations/${evaluationId}/attachments/${attId}`),
    onSuccess: () => {
      toast.success('Đã xóa.')
      qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] })
    },
    onError: e => toast.error(getErrorMessage(e)),
  })

  async function download(att: PeAttachment) {
    try {
      const res = await api.get(
        `/purchase-evaluations/${evaluationId}/attachments/${att.id}/download`,
        { responseType: 'blob' },
      )
      const url = window.URL.createObjectURL(res.data as Blob)
      const a = document.createElement('a')
      a.href = url
      a.download = att.fileName
      a.click()
      window.URL.revokeObjectURL(url)
    } catch (e) {
      toast.error(getErrorMessage(e))
    }
  }

  function onPick(e: React.ChangeEvent<HTMLInputElement>) {
    const f = e.target.files?.[0]
    if (f) upload.mutate(f)
    e.target.value = ''
  }

  const fmtSize = (b: number) =>
    b > 1024 * 1024 ? `${(b / 1024 / 1024).toFixed(1)}MB` : `${Math.round(b / 1024)}KB`

  return (
    <div className="space-y-1">
      {attachments.length === 0 && (
        <div className="text-[11px] italic text-slate-400">Chưa có file</div>
      )}
      {attachments.map(a => (
        <div key={a.id} className="flex items-center gap-1.5 rounded bg-slate-50 px-1.5 py-1 text-[11px]">
          <Paperclip className="h-3 w-3 shrink-0 text-slate-400" />
          <button
            onClick={() => download(a)}
            className="min-w-0 flex-1 truncate text-left text-slate-700 hover:text-brand-700 hover:underline"
            title={a.fileName}
          >
            {a.fileName}
          </button>
          <span className="shrink-0 text-[10px] text-slate-400">{fmtSize(a.fileSize)}</span>
          <span className="shrink-0 rounded bg-slate-200 px-1 text-[9px] text-slate-600">
            {PeAttachmentPurposeLabel[a.purpose] ?? ''}
          </span>
          {!readOnly && (
            <button
              onClick={() => { if (confirm(`Xóa "${a.fileName}"?`)) del.mutate(a.id) }}
              className="shrink-0 rounded px-1 text-red-500 hover:bg-red-50"
              title="Xóa"
            >
              <Trash2 className="h-3 w-3" />
            </button>
          )}
        </div>
      ))}
      {!readOnly && (
        <div>
          <input
            ref={fileInputRef}
            type="file"
            accept=".pdf,.doc,.docx,.xls,.xlsx,.png,.jpg,.jpeg,.webp"
            onChange={onPick}
            className="hidden"
          />
          <button
            onClick={() => fileInputRef.current?.click()}
            disabled={upload.isPending}
            className="inline-flex items-center gap-1 rounded border border-dashed border-slate-300 px-2 py-0.5 text-[11px] text-slate-500 hover:border-brand-300 hover:text-brand-700 disabled:opacity-50"
          >
            <Upload className="h-3 w-3" />
            {upload.isPending ? 'Đang tải…' : '+ Thêm file'}
          </button>
        </div>
      )}
    </div>
  )
}

// ===== Section Bảng so sánh — general attachments (không gắn NCC cụ thể) =====
// Purpose mặc định = ComparisonTable (4). Upload file Excel/PDF tổng hợp so
// sánh giá N NCC × M hạng mục. Storage path giống SupplierAttachmentsCell
// nhưng supplierRowId KHÔNG truyền → BE lưu NULL.
function GeneralAttachmentsSection({
  evaluationId,
  attachments,
  readOnly = false,
}: {
  evaluationId: string
  attachments: PeAttachment[]
  readOnly?: boolean
}) {
  const qc = useQueryClient()
  const fileInputRef = useRef<HTMLInputElement>(null)

  const upload = useMutation({
    mutationFn: async (file: File) => {
      const fd = new FormData()
      fd.append('file', file)
      // KHÔNG append supplierRowId → BE set NULL → general attachment
      fd.append('purpose', String(PeAttachmentPurpose.ComparisonTable))
      return api.post(`/purchase-evaluations/${evaluationId}/attachments`, fd, {
        headers: { 'Content-Type': 'multipart/form-data' },
      })
    },
    onSuccess: () => {
      toast.success('Đã tải lên bảng so sánh.')
      qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] })
    },
    onError: e => toast.error(getErrorMessage(e)),
  })

  const del = useMutation({
    mutationFn: async (attId: string) =>
      api.delete(`/purchase-evaluations/${evaluationId}/attachments/${attId}`),
    onSuccess: () => {
      toast.success('Đã xóa.')
      qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] })
    },
    onError: e => toast.error(getErrorMessage(e)),
  })

  async function download(att: PeAttachment) {
    try {
      const res = await api.get(
        `/purchase-evaluations/${evaluationId}/attachments/${att.id}/download`,
        { responseType: 'blob' },
      )
      const url = window.URL.createObjectURL(res.data as Blob)
      const a = document.createElement('a')
      a.href = url
      a.download = att.fileName
      a.click()
      window.URL.revokeObjectURL(url)
    } catch (e) {
      toast.error(getErrorMessage(e))
    }
  }

  function onPick(e: React.ChangeEvent<HTMLInputElement>) {
    const f = e.target.files?.[0]
    if (f) upload.mutate(f)
    e.target.value = ''
  }

  const fmtSize = (b: number) =>
    b > 1024 * 1024 ? `${(b / 1024 / 1024).toFixed(1)}MB` : `${Math.round(b / 1024)}KB`

  return (
    <div>
      {!readOnly && (
        <p className="mb-2 text-[12px] text-slate-500">
          File Excel/PDF tổng hợp so sánh giá của tất cả NCC (không gắn với 1 NCC cụ thể).
        </p>
      )}
      {attachments.length === 0 && readOnly && (
        <p className="text-sm italic text-slate-400">Chưa có bảng so sánh.</p>
      )}
      {attachments.length > 0 && (
        <div className="mb-2 space-y-1.5">
          {attachments.map(a => (
            <div
              key={a.id}
              className="flex items-center gap-2 rounded border border-slate-200 bg-white px-3 py-2 text-sm shadow-sm"
            >
              <Paperclip className="h-4 w-4 shrink-0 text-brand-500" />
              <button
                onClick={() => download(a)}
                className="min-w-0 flex-1 truncate text-left font-medium text-slate-800 hover:text-brand-700 hover:underline"
                title={a.fileName}
              >
                {a.fileName}
              </button>
              <span className="shrink-0 text-[11px] text-slate-500">{fmtSize(a.fileSize)}</span>
              <span className="shrink-0 rounded bg-brand-50 px-1.5 py-0.5 text-[10px] text-brand-700">
                {PeAttachmentPurposeLabel[a.purpose] ?? 'Khác'}
              </span>
              <span className="shrink-0 text-[10px] text-slate-400">
                {new Date(a.createdAt).toLocaleDateString('vi-VN')}
              </span>
              {!readOnly && (
                <button
                  onClick={() => { if (confirm(`Xóa "${a.fileName}"?`)) del.mutate(a.id) }}
                  className="shrink-0 rounded p-1 text-red-500 hover:bg-red-50"
                  title="Xóa"
                >
                  <Trash2 className="h-3.5 w-3.5" />
                </button>
              )}
            </div>
          ))}
        </div>
      )}
      {!readOnly && (
        <div>
          <input
            ref={fileInputRef}
            type="file"
            accept=".pdf,.doc,.docx,.xls,.xlsx,.png,.jpg,.jpeg,.webp"
            onChange={onPick}
            className="hidden"
          />
          <button
            onClick={() => fileInputRef.current?.click()}
            disabled={upload.isPending}
            className="inline-flex items-center gap-1.5 rounded border border-dashed border-brand-300 bg-brand-50/50 px-3 py-2 text-xs font-medium text-brand-700 hover:border-brand-500 hover:bg-brand-50 disabled:opacity-50"
          >
            <Upload className="h-3.5 w-3.5" />
            {upload.isPending ? 'Đang tải…' : '+ Tải lên bảng so sánh'}
          </button>
        </div>
      )}
    </div>
  )
}