// Workspace 2-panel cho leaf "Thao tác" Pe_*_Create (Type A=DuyetNcc / B=
// DuyetNccPhuongAn). Pattern mirror HĐ Thầu phụ ContractCreatePage:
//   Panel 1 (320px): list pure picker (read-only, không edit/delete) + sticky
//                    "+ Thêm mới" bottom button (Q1 user 2026-05-07).
//   Panel 2 (1fr):    empty state · mode=new <PeHeaderForm> · else
//                    <PeDetailTabs mode="workspace"> (5 section + Section 5
//                    Ý kiến 4PB DISABLED — Q5: nhập ở leaf "Duyệt").
//
// URL: /purchase-evaluations/workspace?type={1|2}[&id=...][&mode=new][&q=][&phase=]
// Workflow Panel + Approvals + History KHÔNG render ở workspace (Q1 — chỉ
// hiện ở leaf Danh sách + Duyệt vẫn 3-panel).
import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
import { useNavigate, useSearchParams } from 'react-router-dom'
import { toast } from 'sonner'
import { ClipboardCheck } from 'lucide-react'
import { EmptyState } from '@/components/EmptyState'
import { PeDetailTabs } from '@/components/pe/PeDetailTabs'
import { PeListPanel } from '@/components/pe/PeListPanel'
import { PeWorkspaceCreateView } from '@/components/pe/PeWorkspaceCreateView'
import { api } from '@/lib/api'
import { getErrorMessage } from '@/lib/apiError'
import {
  PurchaseEvaluationType,
  PurchaseEvaluationTypeLabel,
  type PeDetailBundle,
} from '@/types/purchaseEvaluation'

export function PurchaseEvaluationWorkspacePage() {
  const navigate = useNavigate()
  const qc = useQueryClient()
  const [sp, setSp] = useSearchParams()
  const typeFilter = sp.get('type') ? Number(sp.get('type')) : PurchaseEvaluationType.DuyetNcc
  const search = sp.get('q') ?? ''
  const phase = sp.get('phase') ?? ''
  const selectedId = sp.get('id')
  const mode = sp.get('mode') // 'new' | null
  const autoEditHeader = sp.get('editHeader') === '1'

  const detail = useQuery({
    queryKey: ['pe-detail', selectedId],
    queryFn: async () => (await api.get<PeDetailBundle>(`/purchase-evaluations/${selectedId}`)).data,
    enabled: !!selectedId,
  })

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

  function setParams(updates: Record<string, string | null>) {
    const next = new URLSearchParams(sp)
    for (const [k, v] of Object.entries(updates)) {
      if (v == null || v === '') next.delete(k)
      else next.set(k, v)
    }
    // Search input gõ liên tục → replace (không spam history); pick/mode → push
    const replace = Object.keys(updates).length === 1 && updates.q !== undefined
    setSp(next, { replace })
  }

  const headerTitle = `${PurchaseEvaluationTypeLabel[typeFilter]} — Thao tác`

  return (
    <div className="flex h-[calc(100vh-4rem)] flex-col">
      <header className="flex shrink-0 flex-wrap items-center justify-between gap-3 border-b border-slate-200 bg-white px-6 py-3">
        <div className="flex items-center gap-2">
          <ClipboardCheck className="h-5 w-5 text-slate-500" />
          <h1 className="text-base font-semibold tracking-tight text-slate-900">{headerTitle}</h1>
        </div>
        <div className="text-[12px] text-slate-500">
          Workspace 2-panel — Workflow + Duyệt ở menu &ldquo;Duyệt&rdquo;.
        </div>
      </header>

      <div className="grid flex-1 grid-cols-1 overflow-hidden lg:grid-cols-[320px_1fr]">
        {/* Panel 1: List pure picker + sticky create + pencil edit hover */}
        <PeListPanel
          typeFilter={typeFilter}
          selectedId={selectedId}
          search={search}
          phase={phase}
          onSelect={id => setParams({ id, mode: null, editHeader: null })}
          onSearchChange={q => setParams({ q })}
          onPhaseChange={p => setParams({ phase: p })}
          showCreateButton
          onCreate={() => setParams({ mode: 'new', id: null, editHeader: null })}
          onEditClick={id => setParams({ id, mode: null, editHeader: '1' })}
        />

        {/* Panel 2: Empty | Header form | Detail tabs (workspace mode) */}
        <main className="hidden overflow-y-auto bg-slate-50 p-6 lg:block">
          {/* Empty: chưa pick + chưa create */}
          {!selectedId && mode !== 'new' && (
            <EmptyState
              icon={ClipboardCheck}
              title="Chọn phiếu hoặc tạo mới"
              description='Chọn 1 phiếu ở danh sách trái để nhập liệu, hoặc bấm "+ Thêm mới" ở dưới.'
            />
          )}

          {/* Mode "new": sectioned create view (5 sections, 3-5 locked tới khi save) */}
          {mode === 'new' && (
            <PeWorkspaceCreateView
              defaultType={typeFilter}
              onSaved={(newId, t) => setParams({ id: newId, mode: null, type: String(t) })}
              onCancel={() => setParams({ mode: null })}
            />
          )}

          {/* Mode "edit": detail tabs (workspace = no workflow + Section 5 disabled) */}
          {selectedId && detail.isLoading && (
            <div className="text-sm text-slate-500">Đang tải…</div>
          )}
          {selectedId && detail.data && (
            <PeDetailTabs
              evaluation={detail.data}
              onBack={() => setParams({ id: null, editHeader: null })}
              onDelete={() => del.mutate(detail.data!.id)}
              mode="workspace"
              autoEditHeader={autoEditHeader}
            />
          )}
        </main>
      </div>

      {/* Mobile fallback: nếu không lg, redirect về detail page */}
      {selectedId && (
        <div className="lg:hidden">
          {/* Quick UX: tap row khi mobile sẽ navigate fullpage detail */}
          <button
            onClick={() => navigate(`/purchase-evaluations/${selectedId}`)}
            className="hidden"
          />
        </div>
      )}
    </div>
  )
}