# AI Agent Networking Lab (ANL) — Go/Gin/SQLite Backend API

This module implements the standalone backend REST API server, SQLite database storage, seed ingestion pipeline, and static content exporter for the ANL landing page.

---

## 🏛 Architecture Overview

```
+-------------------------------------------------------------+
|                      SQLite (anl.db)                        |
|   11 Relational Tables (Projects, Members, Pubs, Lectures)  |
+-------------------------------------------------------------+
               ▲                                ▲
               │ (cmd/seed)                     │ (SQL query)
               │                                │
+-------------------------------+   +-------------------------+
| seed/data/*.json              |   | Gin REST API Server     |
| (extracted from content/*.ts) |   | (cmd/api, :8080)        |
+-------------------------------+   +-------------------------+
                                                │
                                    +-------------------------+
                                    | Content Exporter        |
                                    | (cmd/export-content)    |
                                    +-------------------------+
                                                │
                                                ▼
                                    +-------------------------+
                                    | Next.js Static SSG      |
                                    | (refer_landing_page/)   |
                                    +-------------------------+
```

---

## 🚀 Quick Start

### 1. Build Binaries
```bash
make build
```
Creates `bin/api`, `bin/seed`, and `bin/export-content`.

### 2. Run Migrations & Seed Database
```bash
make seed
```
Creates `anl.db`, executes SQL DDL migrations, inserts seed data, and verifies all 11 table row counts and the 5 designated highlights.

### 3. Run Backend API Server
```bash
make run
# Or with options:
./bin/api --port 8080 --db anl.db
```
Server starts at `http://localhost:8080/api/v1`.

### 4. Run Unit & Integration Tests
```bash
make test
```

### 5. Export Content to Next.js Frontend
```bash
make export-content
```
Regenerates `refer_landing_page/content/*.ts` from SQLite with typed `isHighlight` metadata.

---

## 📡 REST API Endpoints (`/api/v1`)

| Method | Path | Description |
|---|---|---|
| `GET` | `/api/v1/health` | Service health status check |
| `GET` | `/api/v1/research-projects` | 3 research project entities |
| `GET` | `/api/v1/research-areas` | 14 core research areas ordered by `display_order` |
| `GET` | `/api/v1/stats/summary` | Aggregated counts (`intl_publications`, `standardization_docs`, `patents`) |
| `GET` | `/api/v1/members` | 16 active members (with `is_advisor` flag) |
| `GET` | `/api/v1/alumni` | 60 alumni ordered chronologically |
| `GET` | `/api/v1/publications` | 148 publications (supports `?category=intl-journal-conf` or `domestic-journal-conf`) |
| `GET` | `/api/v1/publications/highlights` | 5 designated top representative publications (`WHERE is_highlight = 1`) |
| `GET` | `/api/v1/patents` | 75 intellectual property patents |
| `GET` | `/api/v1/semesters` | 45 semesters with nested courses, ordered by year DESC and term |
| `GET` | `/api/v1/standards-bodies` | 6 standards bodies with nested projects and documents (deterministic ordering) |

---

## ⚙️ Environment Configuration (`.env`)

Copy `.env.example` to `.env` to customize runtime settings:

```bash
cp .env.example .env
```

| Variable | Default | Description |
|---|---|---|
| `HOST` | `0.0.0.0` | Binding host IP address |
| `PORT` | `8080` | Server listening port |
| `DB_PATH` | `anl.db` | SQLite database file path |
| `GIN_MODE` | `release` | Gin runtime mode (`release`, `debug`, `test`) |
| `CORS_ALLOW_ORIGINS` | `*` | Allowed CORS origins (e.g. `https://anl.knu.ac.kr`) |
| `AUTO_MIGRATE` | `true` | Apply database migrations automatically on startup |

---

## 🐳 Docker & Containerization

### Build & Run Container
```bash
docker build -t anl-backend-api .
docker run -p 8080:8080 -v anl-data:/app/data anl-backend-api
```

### Docker Compose
Run the full backend service with automated healthchecks and volume persistence from the repository root:

```bash
docker compose up -d
```

---

## 📦 Database Schema & Specifications

* **Architecture**: See [ARCHITECTURE.md](../ARCHITECTURE.md)
* **REST API Interfaces**: See [API_INTERFACE.md](../API_INTERFACE.md)
* **Database Schema Spec**: See [DATA_TABLE.md](../DATA_TABLE.md) and [000001_init.up.sql](internal/db/migrations/000001_init.up.sql)