# ARCHITECTURE.md

## Project Overview

企业供应链合同管理系统 (中尚鹏 / ZSP) — a monorepo enterprise supply chain contract management system. It manages contracts, deliveries, inventory, finance, purchasing, and reporting for a bulk commodity supply chain business.

### 5 Business Modules (21 Sub-menus)

| Module | Sub-menus |
|---|---|
| 合同管理 (Contract) | 业务合同管理, 中尚鹏合同管理, 公司信息管理 |
| 提货管理 (Delivery) | 我要提货, 提货明细, 库存信息, 货权转移, 其他出库 |
| 财务管理 (Finance) | 货代费用, 杂费管理, 服务费管理, 发票管理, 结算管理, 对账单, 利润明细 |
| 采购管理 (Purchase) | 采购报单, 采购运踪明细, 国外供应商, 采购预算 |
| 查询&报表中心 (Reports) | 合同执行情况, 营业明细表, 其他明细表, 商品基础资料, 其他报表 |

---

## Directory Structure

```
zsp-project/
├── frontend/               # Vue 3 SPA (pure-admin-thin)
│   ├── src/
│   │   ├── api/            # Axios API modules (one per domain)
│   │   ├── assets/         # Static assets (icons, images, SVG)
│   │   ├── components/     # Reusable global components
│   │   ├── config/         # Runtime platform configuration
│   │   ├── directives/     # Custom Vue directives (auth, perms, copy, etc.)
│   │   ├── layout/         # App shell (vertical/horizontal/mix layouts)
│   │   ├── plugins/        # Plugin installers (Element Plus, ECharts)
│   │   ├── router/         # Vue Router + auto-imported route modules
│   │   ├── store/          # Pinia stores (user, app, permission, settings, etc.)
│   │   ├── style/          # SCSS/CSS (theme, dark mode, transitions, Tailwind)
│   │   ├── utils/          # HTTP client, auth, tree, message, print, etc.
│   │   └── views/          # Page components by feature domain
│   └── public/             # Static public assets
│
├── backend/                # Go + Gin REST API
│   ├── cmd/api/            # Entry point (main.go)
│   ├── configs/            # YAML configs (dev, prod)
│   ├── internal/
│   │   ├── dto/            # Request/response DTOs
│   │   ├── handler/        # HTTP handlers (Gin controllers)
│   │   ├── middleware/      # JWT auth middleware
│   │   ├── model/          # GORM database models (27 tables)
│   │   ├── repository/     # Data access layer (GORM queries)
│   │   ├── server/         # Router setup and route definitions
│   │   └── service/        # Business logic layer
│   ├── pkg/                # Shared packages (config, database, utils)
│   ├── test/               # Handler integration tests
│   ├── scripts/            # SQL init scripts
│   └── data/               # Uploaded files (runtime)
│
├── docs/                   # Project documentation
│   ├── api/                # API docs and frontend route docs
│   ├── deploy/             # Deployment guides, nginx config
│   ├── dev/                # Requirements, gap analysis, meeting notes
│   └── superpowers/        # Implementation plans and specs
│
├── scripts/                # Test runner, deployment scripts
├── .github/workflows/      # CI pipeline (Go + Vue tests)
└── CLAUDE.md               # Claude Code project guide
```

---

## Technology Stack

### Frontend
| Technology | Version | Purpose |
|---|---|---|
| Vue | 3.5 | UI framework (Composition API) |
| TypeScript | 5.8 | Type safety |
| Vite | 6.3 | Build tool & dev server |
| Pinia | 3.0 | State management |
| Vue Router | 4.5 | Client-side routing |
| Element Plus | 2.9 | UI component library |
| Axios | latest | HTTP client |
| Tailwind CSS | 4.1 | Utility-first CSS |
| ECharts | latest | Data visualization |
| Vitest | latest | Test framework |

### Backend
| Technology | Version | Purpose |
|---|---|---|
| Go | 1.25 | Runtime |
| Gin | 1.10 | HTTP framework |
| GORM | 1.31 | ORM |
| MySQL | 8.0 | Relational database |
| JWT (golang-jwt) | 4.5 | Authentication tokens |
| Viper | 1.21 | Configuration management |
| Excelize | 2.9 | Excel import/export |
| bcrypt | latest | Password hashing |

---

## Backend Architecture

### Layered Design

```
HTTP Request
    │
    ▼
┌─────────────────┐
│   Gin Router     │  internal/server/route.go — single source of truth for all routes
├─────────────────┤
│   Middleware     │  internal/middleware/auth.go — JWT Bearer token validation
├─────────────────┤
│   Handler        │  internal/handler/ — request parsing, response writing (thin)
├─────────────────┤
│   Service        │  internal/service/ — business logic, orchestration
├─────────────────┤
│   Repository     │  internal/repository/ — GORM data access
├─────────────────┤
│   Model          │  internal/model/ — GORM structs with table tags
└─────────────────┘
    │
    ▼
  MySQL 8.0
```

**Key pattern**: Manual dependency injection in `cmd/api/main.go` — all repositories, services, and handlers are wired together at startup. Every service and most repositories define a Go interface, enabling mock-based unit testing.

### Startup Sequence (main.go)

1. Load YAML config via Viper (`CONFIG_PATH` env var)
2. Ensure MySQL database exists (create/drop per config)
3. Open GORM DB connection pool
4. `AutoMigrate` all 27 model tables
5. Instantiate repositories → services → handlers (manual DI)
6. Create JWT auth middleware
7. Setup Gin router (`server.SetupRouter`)
8. Start HTTP server (goroutine)
9. Graceful shutdown on SIGINT/SIGTERM

### API Route Groups

All routes are under `/api/` prefix with JWT middleware applied globally except for auth endpoints and static file serving.

| Route Group | Prefix | Handler | Key Endpoints |
|---|---|---|---|
| Auth (public) | `/api/auth` | UserHandler | `POST /register`, `POST /login` |
| Users | `/api/users` | UserHandler | `GET /:id` |
| Contract | `/api/contract` | ContractHandler | CRUD, file upload, folders, batches |
| ZSP Contract | `/api/zsp-contract` | ZSPContractHandler | CRUD, details, Excel import/export |
| Company | `/api/company` | CompanyHandler | Folders, file upload/CRUD |
| Delivery | `/api/apply-delivery` | DeliveryHandler | Delivery applications |
| Outbound | `/api/delivery-details` | DeliveryHandler | Outbound orders |
| Inventory | `/api/inventory` | DeliveryHandler | Warehouses, inbound, summary |
| Ownership | `/api/ownership-transfer` | DeliveryHandler | Ownership transfer CRUD + files |
| Finance | `/api/zsp-finances` | ZSPFinancesHandler | Freight, misc, service fees, costs, profits |

### Data Models (27 GORM Tables)

| Domain | Tables |
|---|---|
| User | `users` |
| Contract | `contracts`, `contract_files`, `contract_folders`, `contract_batches`, `contract_batch_files` |
| ZSP Contract | `zsp_contract_folders`, `zsp_contract_files`, `zsp_contract_details` |
| Company | `company_folders`, `company_files` |
| Delivery | `delivery_applies`, `delivery_outbounds`, `warehouses`, `inventory_inbounds`, `ownership_transfers`, `ownership_transfer_bls`, `ownership_transfer_files` |
| Finance | `zsp_freight_charges`, `zsp_misc_charges`, `zsp_service_fees`, `zsp_cost_breakdowns`, `zsp_profit_records` |
| Invoice | `zsp_upstream_invoices`, `zsp_downstream_invoices`, `zsp_freight_misc_invoices` |
| Settlement | `zsp_settlements`, `zsp_reconciliations` |

Note: Invoice and Settlement models are defined and auto-migrated but not yet wired into handlers/services.

### File Storage

Uploaded files are stored on the local filesystem under `backend/data/`:
- `./data/contract/` — contract files
- `./data/contract/batch/` — batch contract files
- `./data/zsp-contract/files/` — ZSP contract files
- `./data/company/files/` — company info files

Files are served statically via Gin (`/api/contract-files`, `/api/zsp-contract-files`, `/api/company-files`).

---

## Frontend Architecture

### Component Tree

```
App.vue
└── <el-config-provider>
    ├── <router-view>         # Page content (or login page)
    └── <ReDialog />          # Global dialog manager

Layout (after login)
    └── Layout (index.vue)    # Three modes: vertical / horizontal / mix
        ├── Navbar            # Top bar (user info, search, fullscreen)
        ├── Sidebar           # Menu (vertical/horizontal/mix variants)
        ├── MultiTags         # Tab-based page navigation
        ├── <router-view>     # Keep-alive cached page views
        │   └── Page View     # Domain-specific business pages
        └── Settings Panel    # Theme/layout preferences drawer
```

### Page Composition Pattern

Complex pages follow a consistent decomposition:

```
views/system/contract/business-contract/
├── index.vue              # Page assembly (layout, orchestrates sub-components)
├── components/            # Page-specific sub-components
│   ├── ContractTable.vue
│   ├── EditContractDialog.vue
│   ├── FolderPanel.vue
│   ├── SearchPanel.vue
│   └── UploadDialog.vue
├── hooks/                 # Composition API hooks (business logic)
│   └── useContract.ts
└── types.ts               # Page-specific TypeScript types
```

### Routing

Routes use `import.meta.glob` to auto-import all modules from `src/router/modules/`. Two-tier routing:
- **Static routes**: Built-in pages (login, error pages, welcome, home) — defined in router modules
- **Async routes**: Business pages fetched from backend `/get-async-routes` after login, merged with static routes, filtered by user roles

Route structure mirrors the 5 business modules:
```
/                           → Home
/login                      → Login
/system/contract/*           → Contract management (3 pages)
/system/delivery/*           → Delivery management (5 pages)
/system/finance/*            → Finance management (7 pages)
/system/purchase/*           → Purchase management (4 pages)
/system/query-report/*       → Query & reports (5 pages)
```

### State Management (Pinia)

| Store | Key State |
|---|---|
| `user` | avatar, username, roles, permissions, tokens |
| `app` | sidebar state, layout mode, device type |
| `permission` | constant/whole menus, flattened routes, keep-alive cache list |
| `settings` | title, fixed header, sidebar visibility |
| `multiTags` | open tab list, tab cache toggle |
| `epTheme` | theme color, light/dark mode |

### API Layer (`src/api/`)

Each API module exports typed functions returning `BaseResponse<T>`:

```typescript
// Pattern: src/api/contract.ts
import { http } from "@/utils/http";
import { baseUrlApi } from "./utils";

export const getContractList = (params?: object) => {
  return http.request<BaseResponse<Contract[]>>("get", baseUrlApi("contract"), { params });
};
```

The HTTP client (`src/utils/http/index.ts`) handles:
- Base URL resolution (dev proxy vs production)
- JWT token attachment via request interceptor
- Automatic token refresh on 401 with request queueing
- NProgress loading bar integration

### Authentication Flow

```
Login → POST /api/auth/login
    → Receive JWT token
    → Store in cookies + localStorage
    → Fetch user info + async routes
    → Build dynamic menu from roles
    → Navigate to home

Token refresh:
    → 401 response intercepted
    → Queue subsequent requests
    → POST /refresh-token
    → Replay queued requests with new token
```

### Permission System

Two levels:
- **Route-level**: `meta.roles` in route config filtered against user roles
- **Button-level**: `v-auth` / `v-perms` directives and `<Auth>` / `<Perms>` components

---

## Data Flow

```
User Action (UI)
    → Pinia Store action (optional, for shared state)
    → API function call (src/api/domain.ts)
    → Axios request (auto-attaches JWT)
    → Vite dev proxy (/api → localhost:8080) or nginx proxy (production)
    → Gin router → JWT middleware → Handler
    → Service (business logic)
    → Repository (GORM queries)
    → MySQL 8.0
    ← JSON response { success, data, message }
    ← Axios interceptor (deserialize, handle 401)
    ← Component re-render
```

---

## Authentication & Authorization

- **Scheme**: JWT Bearer tokens (HS256, 24-hour expiry)
- **Password storage**: bcrypt hashed
- **Public endpoints**: `POST /api/auth/register`, `POST /api/auth/login`, static file routes
- **Middleware**: Extracts user ID from JWT claims into Gin context; all other routes require valid token
- **CORS**: All origins allowed with Authorization header (dev mode)

---

## Testing Strategy

### Backend Tests

| Location | Type | Coverage |
|---|---|---|
| `backend/test/` | Handler integration tests | User, contract, ZSP contract, company, delivery, finance handlers |
| `backend/internal/service/` | Service unit tests | User service (with mock repository) |

Pattern: Mock service/repository interfaces, use `httptest.NewRecorder` with Gin test mode.

### Frontend Tests

| Location | Type | Coverage |
|---|---|---|
| `src/api/__tests__/` | API module tests | All 12 API modules |
| `src/components/business/__tests__/` | Component tests | ConfirmDialog |
| `src/store/modules/__tests__/` | Store tests | User store |
| `src/utils/__tests__/` | Utility tests | Tree utilities |

Framework: Vitest + jsdom + @vue/test-utils. Test helpers in `src/api/test-utils.ts`.

### Test Runner

`scripts/run-tests.sh` supports: `backend`, `frontend`, `coverage`, `ci`, `all`.

---

## Deployment

### Development

```bash
# Backend (port 8080)
cd backend && go run cmd/api/main.go
# or with hot-reload
cd backend && air -c .air.toml

# Frontend (port 5173, proxies /api → 8080)
cd frontend && pnpm dev

# Docker Compose (backend + MySQL + Air)
cd backend && docker-compose -f docker-compose.dev.yml up --build
```

### Production

```bash
# Frontend build
cd frontend && pnpm build   # → dist/

# Backend build (Docker)
cd backend && docker build -t zsp-backend .

# Full stack
docker-compose --env-file .env.prod up -d
```

Nginx serves the frontend SPA and proxies `/api/` to the Go backend. Configuration at `docs/deploy/nginx.conf`.

---

## CI/CD

`.github/workflows/test.yml` — Three-job pipeline triggered on push/PR to `master`/`main`/`dev`:

1. **Backend**: Go 1.25 + MySQL 8 service → `go test ./... -race`
2. **Frontend**: Node 22 + pnpm 9 → `vitest run` + `typecheck` + `eslint`
3. **Summary**: Gate job, fails if either backend or frontend fails

---

## Key Design Decisions

1. **Manual DI over framework**: All wiring in `main.go` keeps dependencies explicit and avoids magic
2. **Interface-based services**: Every service defines an interface for testability via mocks
3. **DTOs at API boundary**: Request/response types in `internal/dto/` decouple API contract from database schema
4. **AutoMigrate for schema**: All 27 models migrated on startup; additive-only schema changes
5. **File storage on local FS**: Uploaded files go to `data/` directory, served statically by Gin
6. **Glob-based route auto-import**: Vite's `import.meta.glob` loads all router modules without manual registration
7. **Token refresh with request queueing**: Axios interceptor queues failed requests during token refresh, replays them after
8. **Dual contract models**: Legacy `Contract` coexists with `ZSPContractFile`/`ZSPContractDetail` for backward compatibility

## Known Issues

1. **Dual contract models** — Legacy `Contract` and new `ZSPContractFile`/`ZSPContractDetail` models coexist with overlapping concerns
2. **API URL inconsistency** — Some routes use `/list`, `/create`, `/update/:id` suffixes while others use direct REST patterns
3. **Incomplete module coverage** — Invoice and Settlement models are in AutoMigrate but lack handlers, services, and repositories
4. **Delivery handler complexity** — `InventorySummary` bypasses the service/repository layer and accesses `*gorm.DB` directly for complex aggregate queries
5. **Hardcoded UI text** — All UI text is hardcoded in Chinese; no i18n infrastructure
6. **Handler-level inconsistency** — Some handlers use proper DTOs, others use inline anonymous structs for request binding
7. **Frontend finance API inconsistency** — Finance API modules use hardcoded `/zsp-finances/` prefix while other modules use `/api/` prefix via `baseUrlApi()`