# Architecture — SOLUTION_ERP

> Kiến trúc tổng thể + trách nhiệm từng layer + diagram luồng dữ liệu.

## 1. Layered overview

```
┌──────────────────────────────────────────────────────────────┐
│                       CLIENT TIER                             │
│  ┌──────────────────┐       ┌──────────────────┐             │
│  │  fe-admin :8082  │       │  fe-user :8080   │             │
│  │  React 19 + Vite │       │  React 19 + Vite │             │
│  │  Tailwind 4      │       │  Tailwind 4      │             │
│  │  TanStack Query  │       │  TanStack Query  │             │
│  └────────┬─────────┘       └────────┬─────────┘             │
└───────────┼──────────────────────────┼───────────────────────┘
            │  Vite dev proxy /api     │
            │  IIS URL Rewrite prod    │
            ▼                          ▼
┌──────────────────────────────────────────────────────────────┐
│                     API LAYER (:5443)                         │
│  SolutionErp.Api — ASP.NET Core 10 Web API                   │
│  ┌────────────────────────────────────────────────────────┐  │
│  │ Controllers: Auth, Menus, Roles, Permissions,          │  │
│  │              Suppliers, Projects, Departments,         │  │
│  │              Forms, Contracts, Reports                 │  │
│  │ Middleware: GlobalException, Serilog, CORS, JWT        │  │
│  │ Authorization: MenuPermissionHandler (policy-based)    │  │
│  │ Services: CurrentUserService, WebHostEnvLocator        │  │
│  │ wwwroot/templates/ (5 .docx/.xlsx)                     │  │
│  └────────────────────┬───────────────────────────────────┘  │
└───────────────────────┼──────────────────────────────────────┘
                        │ MediatR ISender.Send(cmd)
                        ▼
┌──────────────────────────────────────────────────────────────┐
│                    APPLICATION LAYER                          │
│  SolutionErp.Application                                     │
│                                                               │
│  ┌──────────────┐  ┌──────────────┐  ┌──────────────────┐    │
│  │ Auth         │  │ Master       │  │ Permissions      │    │
│  │ (Login/Me)   │  │ (CRUD 3      │  │ (Menu tree +     │    │
│  │              │  │  entity)     │  │  matrix)         │    │
│  └──────────────┘  └──────────────┘  └──────────────────┘    │
│  ┌──────────────┐  ┌──────────────────┐                      │
│  │ Forms        │  │ Contracts        │  ┌──────────────┐    │
│  │ (Render      │  │ (Workflow 9      │  │ Reports      │    │
│  │  engine)     │  │  phase, Inbox)   │  │ (Dashboard + │    │
│  └──────────────┘  └──────────────────┘  │  Excel exp)  │    │
│                                           └──────────────┘    │
│  ┌──────────────────────────────────────────────────────┐    │
│  │ Common: Exceptions, Behaviors (ValidationPipeline),  │    │
│  │         Interfaces (IDbContext, ICurrentUser, ...),  │    │
│  │         Models (PagedResult)                         │    │
│  └──────────────────────────────────────────────────────┘    │
└───────┬──────────────────────────────────────────┬───────────┘
        │ depends on interface                     │ runs on
        ▼                                          ▼
┌──────────────────────┐           ┌───────────────────────────┐
│    DOMAIN LAYER      │           │   INFRASTRUCTURE LAYER    │
│  SolutionErp.Domain  │           │  SolutionErp.Infrastructure│
│                      │           │                           │
│  Common/BaseEntity   │           │  Persistence/ApplicationD │
│  Contracts/          │           │    bContext + Migrations  │
│  Forms/              │           │  Identity/JwtTokenService │
│  Identity/           │           │  Forms/Docx+XlsxRenderer  │
│  Master/             │           │  Services/ContractWorkflow│
│                      │           │    + ContractCodeGenerator│
│  Enum + value object │           │  Reports/ExcelExporter    │
└──────────────────────┘           │  Services/DateTimeService │
        ↑                          └────────────┬──────────────┘
        │ references                            │
        └───────────────────────────────────────┘
                                                │
                                                ▼
                                    ┌───────────────────────┐
                                    │  DATA TIER            │
                                    │  SQL Server 2022      │
                                    │  (dbo schema, 19 bảng)│
                                    └───────────────────────┘
```

## 2. Request lifecycle (1 POST/api/contracts)

```
1. Browser  →  POST /api/contracts    { type, supplierId, ... }
2. Vite     →  proxy tới :5443
3. JwtBearerMiddleware  →  validate token, set ClaimsPrincipal
4. Routing  →  ContractsController.Create(cmd)
5. MediatR.Send(CreateContractCommand)
6. ValidationBehavior (pipeline)  →  FluentValidation run
7. CreateContractCommandHandler
   ├─ check Supplier/Project exists (IApplicationDbContext)
   ├─ new Contract entity + set DrafterUserId (ICurrentUser)
   ├─ set SlaDeadline (IDateTime + IContractWorkflowService.GetPhaseSla)
   ├─ db.Contracts.Add(...)
   └─ SaveChangesAsync
      ├─ AuditingInterceptor sets CreatedAt/CreatedBy
      └─ EF Core INSERT → SQL Server
8. Return Guid id
9. Controller  →  201 Created + Location header
10. Axios interceptor (FE)  →  TanStack Query invalidate + UI update
```

## 3. Workflow state machine (Phase 3)

Xem full ở [`workflow-contract.md`](workflow-contract.md).

```
DangChon → DangSoanThao → DangGopY → DangDamPhan → DangInKy →
  → DangKiemTraCCM → DangTrinhKy → DangDongDau → DaPhatHanh

Alternates: → TuChoi (từ DangSoanThao)
            → DangSoanThao (revise từ bất kỳ phase duyệt)

Bypass CĐT (BypassProcurementAndCCM=true):
  DangInKy → DangTrinhKy (skip CCM)
```

**Code generator trigger:** khi `targetPhase = DangDongDau` + `MaHopDong IS NULL` → gen format RG-001 với transaction SERIALIZABLE.

## 4. Permission model

```
User ──(AspNetUserRoles)── Role ──(Permissions)── MenuItem
                                      │
                                      ├── CanRead
                                      ├── CanCreate
                                      ├── CanUpdate
                                      └── CanDelete
```

**Resolution:**
- Login → JWT chứa claims (sub, email, roles)
- `/api/menus/me` → query Permissions theo roleIds, **union OR** CRUD flags, filter tree theo CanRead
- FE cache menu trong `AuthContext` + localStorage
- Mỗi API action: `[Authorize(Policy = "{MenuKey}.{Action}")]` → `MenuPermissionHandler` check

**Admin bypass:** role `Admin` luôn pass mọi policy (seed default full CRUD).

## 5. Data flow — "tạo HĐ và chạy hết workflow"

```mermaid
sequenceDiagram
    actor D as Drafter
    actor M as Manager (PD/PM)
    actor C as CCM
    actor B as BOD
    actor H as HRA

    participant FE as fe-user
    participant API
    participant WF as WorkflowService
    participant CG as CodeGenerator
    participant DB

    D->>FE: POST /contracts/new
    FE->>API: POST /api/contracts
    API->>DB: INSERT Contracts (Phase=DangSoanThao, SLA=+7d)
    API-->>FE: 201 {id}

    D->>FE: Click "Submit → góp ý"
    FE->>API: POST /contracts/{id}/transitions {target:3}
    API->>WF: Transition(contract, 3, roles=[Drafter])
    WF->>WF: Check adjacency + role
    WF->>DB: INSERT ContractApproval + UPDATE Contract Phase=3
    API-->>FE: 204

    M->>FE: Inbox → click HĐ → góp ý + "Chuyển tiếp"
    FE->>API: POST /transitions {target:4}
    API->>WF: Transition → Phase 4
    Note over WF: Chạy tương tự qua 5,6,7

    B->>FE: Duyệt → target:8 DangDongDau
    FE->>API: POST /transitions {target:8}
    API->>WF: Transition
    WF->>CG: GenerateAsync(contract, project, supplier)
    CG->>DB: BEGIN TRAN SERIALIZABLE
    CG->>DB: SELECT/UPDATE ContractCodeSequences
    CG->>DB: COMMIT
    CG-->>WF: "FLOCK 01/HĐGK/SOL&PVL/03"
    WF->>DB: UPDATE Contract SET MaHopDong, Phase=8
    API-->>FE: 204

    H->>FE: Click đóng dấu → target:9
    FE->>API: POST /transitions {target:9}
    API->>WF: Transition (role HrAdmin)
    WF->>DB: UPDATE Phase=9 (DaPhatHanh)
    API-->>FE: 204
```

## 6. Deployment architecture (Phase 5 — planned)

```
                ┌─────────────────────────────┐
                │   Internet / Corp LAN       │
                └──────────────┬──────────────┘
                               │
                    ┌──────────▼──────────┐
                    │  IIS (Win Server)   │
                    │  URL Rewrite / ARR  │
                    └──────────┬──────────┘
                 ┌─────────────┼─────────────┐
                 │             │             │
          ┌──────▼──────┐ ┌───▼────┐ ┌──────▼──────┐
          │ fe-admin    │ │ Api    │ │ fe-user     │
          │ static files│ │ Kestrel│ │ static files│
          │ (dist/)     │ │ :5443  │ │ (dist/)     │
          └─────────────┘ └───┬────┘ └─────────────┘
                              │
                     ┌────────▼────────┐
                     │  SQL Server     │
                     │  (same host OR  │
                     │   separate VM)  │
                     └─────────────────┘
```

- IIS app pool riêng cho Api, Integrated Managed Pipeline, .NET CLR disabled (hosting .NET 10 OOP)
- Static files 2 FE deploy vào `C:\inetpub\wwwroot\solution-erp-admin\` + `...user\`
- HTTPS: Let's Encrypt qua win-acme (hoặc cert mua)
- Backup SQL: daily full + 15min log → D:\Backups

## 7. Skill library (AI agent support)

`.claude/skills/` có 3 skill chuyên biệt:

| Skill | Dùng khi |
|---|---|
| [`contract-workflow`](../.claude/skills/contract-workflow/SKILL.md) | Debug chuyển phase, 403, mã HĐ, bypass CĐT |
| [`form-engine`](../.claude/skills/form-engine/SKILL.md) | Render template, upload, placeholder không replace |
| [`permission-matrix`](../.claude/skills/permission-matrix/SKILL.md) | Access denied, menu không hiện, gán role |

Claude auto-invoke theo description matching.

## 8. Non-functional

| Aspect | Current | Phase 5 target |
|---|---|---|
| Availability | dev-only | 99.5% (IIS restart, SQL HA optional) |
| Latency | <200ms P95 local | <500ms P95 prod |
| Concurrency | unrestricted | rate limit 100 req/min/IP |
| Observability | Serilog console | + file rolling daily + Seq/ELK |
| Security | JWT + HTTPS dev | + rate limit + audit log + CSP |

## 9. PurchaseEvaluation (Phase 6 — tiền-HĐ)

Module mới song song Contract — phiếu trình duyệt so sánh giá N NCC × M hạng mục, duyệt xong kế thừa làm HĐ.

```
PurchaseEvaluation (Header) ─< PurchaseEvaluationSupplier (N:M × Supplier)
                            ─< PurchaseEvaluationDetail (hạng mục) ─< PurchaseEvaluationQuote (báo giá N×M)
                            ─< PurchaseEvaluationApproval (workflow history)
                            ─< PurchaseEvaluationChangelog (audit)
                            ─< PurchaseEvaluationAttachment (file)
                            ─> PurchaseEvaluationWorkflowDefinition (PINNED at create)
                            ─> Contract? (nullable FK — set khi gen HĐ từ phiếu DaDuyet)
```

**Workflow** (tách riêng vì Phase enum khác ContractPhase):
- A `DuyetNcc` — 3 step: Drafter → Procurement → CostControl → Director → DaDuyet
- B `DuyetNccPhuongAn` — 5 step: + ProjectManager sau Procurement, + Director duyệt PA trước duyệt NCC

**Kế thừa HĐ** (`CreateContractFromEvaluationCommand`):
- Guard: phase = DaDuyet, SelectedSupplierId != null, ContractId = null
- User pick ContractType (1-7) → gen Contract draft với SupplierId/ProjectId/GiaTri kế thừa
- Pin `Contract.WorkflowDefinitionId` theo ContractType chọn
- Link 2 chiều: `PurchaseEvaluation.ContractId = contract.Id`

Chi tiết: [`database/schema-diagram.md §11`](database/schema-diagram.md).

## 10. Budget (Phase 7 — Module Ngân sách)

Module quản lý ngân sách dự án: header + chi tiết hạng mục + workflow simple 3-step + audit log. Liên kết nullable cả Contract và PurchaseEvaluation để đối chiếu chi phí.

```
Budget (Header) ─< BudgetDetail (flat row hạng mục)
                ─< BudgetApproval (workflow history)
                ─< BudgetChangelog (audit log)
                ─> Project (FK Restrict)
                ─> Department? (FK Restrict)
                ─> User Drafter (FK Restrict)

Contract.BudgetId? ──────────► Budget (link đối chiếu chi phí HĐ)
PurchaseEvaluation.BudgetId? ─► Budget (link đối chiếu chi phí tiền-HĐ)
```

**Phase enum** (`BudgetPhase` 5-state):

```
DangSoanThao(1) ──Trình──► ChoCCM(2) ──Duyệt──► ChoCEO(3) ──Duyệt──► DaDuyet(4)
       ▲                       │                     │
       └──Reject(99)───────────┴─────────────────────┘
```

**Workflow simple hardcoded** (`BudgetPolicy.Default`):
- Drafter / DeptManager: DangSoanThao → ChoCCM (Trình) hoặc → TuChoi (Hủy)
- CostControl (CCM): ChoCCM → ChoCEO (Duyệt) hoặc → DangSoanThao (Trả về)
- Director / AuthorizedSigner: ChoCEO → DaDuyet (Duyệt) hoặc → DangSoanThao (Trả về)

**Mã ngân sách** `NS-{YYYYMM}-{Random:4d}` — hiện Random.Shared, sẽ chuyển atomic SERIALIZABLE khi format chốt chính thức (mirror Contract/PE pattern).

**Auto-recompute** `TongNganSach`:
- Sau Add/Update/Delete BudgetDetail → handler tự sum `Sum(d.ThanhTien)` lại Header.
- Tránh state drift, đơn giản hơn trigger DB.

**Integration roadmap**:
- PE form select Budget (filter `Phase=DaDuyet && NamNganSach=current && ProjectId match`)
- Contract form tương tự
- Tab Hạng mục PE/HD compute "So với ngân sách" (match GroupCode + ItemCode)

Chi tiết: [`database/schema-diagram.md §12`](database/schema-diagram.md).

## 11. Testing strategy (Phase 8 — Session 5)

Test pyramid bottom-heavy, **không E2E** (brittle, maintenance cao cho solo dev).

```
┌──────────────────────────────────┐  ❌ Skip
│  E2E / UI (Playwright)           │     Brittle, slow, tốn time maintain
├──────────────────────────────────┤  ⚠️  TODO Phase 4
│  API smoke (WebApplicationFactory)│     1-2 happy path roundtrip per critical endpoint
├──────────────────────────────────┤  🟡 Mini done — 6 test (29/04)
│  Application Handler (CQRS)      │     PE Workflow Definition versioning. Phase 3 full
│                                  │     (Opinion + Budget link) cần UserManager DI helper
├──────────────────────────────────┤  ✅ Done Phase 2 — 17 test
│  Infrastructure (SQLite in-mem)  │     Code generator format + sequence + year boundary
├──────────────────────────────────┤  ✅ Done Phase 1 — 54 test
│  Domain Policy (pure functions)  │     State machine + role transition + Registry mapping
└──────────────────────────────────┘
                                Total: 77 test pass / ~3s
```

**Stack:**

| Layer | Framework | Note |
|---|---|---|
| .NET test | xUnit 2.9.3 | Industry standard |
| Assertion | FluentAssertions 7.2 | Pin trước v8 commercial license |
| EF testing | Microsoft.EntityFrameworkCore.Sqlite 10 | Phase 2+ — supports transactions |
| Test fixture | Custom `SqliteDbFixture` + `TestApplicationDbContext` | Override `nvarchar(max) → TEXT` cho SQLite compat |

**CI gate:** `.gitea/workflows/deploy.yml` chạy `dotnet test` cho từng test project TRƯỚC build/publish/deploy. Test fail → `exit $LASTEXITCODE` → no deploy.

```yaml
- name: Run unit tests (Domain)
  run: dotnet test tests/SolutionErp.Domain.Tests/...

- name: Run integration tests (Infrastructure)
  run: dotnet test tests/SolutionErp.Infrastructure.Tests/...
```

**Phase priority — anti-overkill:**

1. **Phase 1 (Done)** — Domain policy: 3 test file (Contract WF / PE WF / Budget) cover transition rules + Registry + FromDefinition. **54 test**, < 1s.
2. **Phase 2 (Done)** — Infra code generator: format RG-001/PE + sequence increment + year boundary (framework HĐ). **17 test**, ~2s.
3. **Phase 3 mini (Done)** — Application versioning: `CreatePeWorkflowDefinitionCommand` auto-increment + deactivate cũ + EvaluationType independence. **6 test**.
4. **Phase 3 full (Pending)** — Application handlers cần Identity (UpsertOpinion, Budget link validation in CreatePE/CreateContract). Cần build UserManager DI helper trong test fixture.
5. **Phase 4 (Pending)** — API smoke: WebApplicationFactory + SQLite, 5-7 endpoint critical roundtrip.
6. **Phase 5 (Pending)** — FE Vitest cho lib utility (queryMatches, fmtMoney) — chỉ pure functions, KHÔNG component snapshot.

**Quy tắc bổ sung mỗi feature mới:**
- Domain policy method → 2-3 test (positive + negative + edge)
- CQRS handler có guard → 1 test mỗi guard branch
- Bug found in production → 1 regression test added before merge

Detail run: `dotnet test SolutionErp.slnx` chạy cả **77 test ~3s**.

### CI/CD optimization (29/04)

3 fix lớn cho Gitea Actions sau khi gặp incident #108/#109:

1. **Manual checkout bypass github.com (gotcha #39)**:
   - Replace `uses: actions/checkout@v4` bằng manual `git init` + `git fetch` từ Gitea internal
   - Lý do: act_runner mỗi run đều fetch action source từ github.com → TCP timeout 21s liên tục → toàn job fail trước test gate
   - Token `${{ github.token }}` Gitea tự cấp per-job, fetch by ref + depth=30

2. **Path filter docs-only skip (gotcha #41)**:
   - `paths-ignore: ['docs/**', '**/*.md', '.claude/skills/**']` trong `on:push`
   - Commit chỉ touch docs/MD/skill → **Gitea NO trigger workflow** (saving 100% time, ~196s/commit)
   - Workflow file `.gitea/workflows/**` KHÔNG ignore → vẫn trigger khi sửa CI config

3. **npm junction cache (gotcha #40)** — thử ở commit `29eb5d9`, fail `tsc not found`:
   - Hypothesis: Move-Item của `node_modules` chứa nested junctions → .bin/ relative paths broken
   - Rolled back ở `a21790d`, giữ fresh `npm install` mỗi run (49s + 33s = 82s)
   - TODO future session: thử `robocopy /MIR` hoặc act_runner built-in cache server

**Tốc độ deploy hiện tại** (run #110/#112):

| Trigger | CI behavior | Total time |
|---|---|---:|
| Code commit | Build + test gate + deploy | ~3 phút |
| Docs-only commit | **Skip CI** (path filter) | **0s** |
| Test fail | Skip build/deploy | ~30-40s |

## 12. Liên quan

- [`rules.md`](rules.md) — coding conventions
- [`database/database-guide.md`](database/database-guide.md) — DB schema chi tiết
- [`flows/`](flows/) — per-feature sequence diagrams
- [`workflow-contract.md`](workflow-contract.md) — state machine spec
- [`forms-spec.md`](forms-spec.md) — 8 form catalog