# ═══════════════════════════════════════════════════════════════
# docker-compose.external-db.yml — 模式二：使用现有 MySQL
#
# 适用场景：
#   - 已有云数据库（如 RDS、本项目使用的 pma.hty1024.com:31000）
#   - 不想在容器内运行 MySQL
#
# 用法：
#   cp .env.external-db.example .env.external-db
#   # 编辑 .env.external-db 填写实际数据库连接信息
#   docker compose -f docker-compose.external-db.yml \
#                  --env-file .env.external-db up -d
#
# 包含服务：
#   app   — Flask + Gunicorn
#   nginx — Nginx 反向代理（可选，使用 --profile nginx 启用）
# ═══════════════════════════════════════════════════════════════

services:

  # ── Flask 应用 ──────────────────────────────────────────────
  app:
    build:
      context: .
      dockerfile: Dockerfile
    image: resource-library:latest
    container_name: resource_library_app
    restart: unless-stopped
    environment:
      FLASK_ENV: ${FLASK_ENV:-production}
      SECRET_KEY: ${SECRET_KEY}
      DATABASE_URL: ${DATABASE_URL}          # 完整连接串，见 .env.external-db.example
      ADMIN_USERNAME: ${ADMIN_USERNAME:-admin}
      ADMIN_PASSWORD: ${ADMIN_PASSWORD:-Admin@123456}
      ADMIN_EMAIL: ${ADMIN_EMAIL:-admin@example.com}
      GUNICORN_WORKERS: ${GUNICORN_WORKERS:-4}
      GUNICORN_TIMEOUT: ${GUNICORN_TIMEOUT:-120}
      MAX_UPLOAD_SIZE_MB: ${MAX_UPLOAD_SIZE_MB:-500}
      LOG_LEVEL: ${LOG_LEVEL:-info}
      # 外部数据库等待超时（秒）
      DB_WAIT_SECONDS: ${DB_WAIT_SECONDS:-30}
    volumes:
      - uploads_data:/app/app/static/uploads
    ports:
      - "${APP_PORT:-5000}:5000"
    extra_hosts:
      # 将外部数据库主机名加入容器 hosts（若使用域名访问外部 DB）
      # 格式：- "db-host:实际IP"
      # 若主机名可正常解析则不需要此配置
      - "host-gateway:host-gateway"
    networks:
      - frontend
    logging:
      driver: json-file
      options:
        max-size: "20m"
        max-file: "5"

  # ── Nginx 反向代理（可选）──────────────────────────────────
  nginx:
    image: nginx:1.27-alpine
    container_name: resource_library_nginx
    restart: unless-stopped
    profiles: ["nginx"]
    depends_on:
      - app
    ports:
      - "${NGINX_HTTP_PORT:-80}:80"
      - "${NGINX_HTTPS_PORT:-443}:443"
    volumes:
      - ./docker/nginx.conf:/etc/nginx/conf.d/default.conf:ro
      - uploads_data:/app/app/static/uploads:ro
    networks:
      - frontend
    logging:
      driver: json-file
      options:
        max-size: "10m"
        max-file: "3"

# ── 持久化卷 ────────────────────────────────────────────────────
volumes:
  uploads_data:
    name: resource_library_uploads

# ── 网络 ────────────────────────────────────────────────────────
networks:
  frontend:
    name: resource_library_frontend