version: '3.8'

services:
  # PostgreSQL database
  postgres:
    image: postgres:16-alpine
    container_name: langchain-agent-db
    networks:
      - app-network
    environment:
      POSTGRES_DB: postgres
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: ${POSTGRES_ROOT_PASSWORD:-postgres_root_password}
      # These are used by init scripts to create the app database
      APP_DB_NAME: ${POSTGRES_DB:-ai_conversations}
      APP_DB_USER: ${POSTGRES_USER:-myapp_user}
      APP_DB_PASSWORD: ${POSTGRES_PASSWORD:-secure_password_123}
    volumes:
      - postgres_data:/var/lib/postgresql/data
      - ../scripts/init_database:/docker-entrypoint-initdb.d
    ports:
      - "${POSTGRES_PORT:-5432}:5432"
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5
    restart: unless-stopped

  # Backend API server
  backend:
    build:
      context: ..
      dockerfile: docker/Dockerfile.prod
    container_name: langchain-agent-backend
    environment:
      - PYTHONPATH=/app
      - PYTHONUNBUFFERED=1
      - CONN_STR=postgresql://${POSTGRES_USER:-myapp_user}:${POSTGRES_PASSWORD:-secure_password_123}@postgres:5432/${POSTGRES_DB:-ai_conversations}
      - POSTGRES_USER=${POSTGRES_USER:-myapp_user}
      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-secure_password_123}
      - POSTGRES_DB=${POSTGRES_DB:-ai_conversations}
    ports:
      - "${BACKEND_PORT:-8500}:8500"
    volumes:
      - ../configs:/app/configs
      - ../scripts:/app/scripts
      - ../assets:/app/assets
      - ../static:/app/static
    networks:
      - app-network
    depends_on:
      postgres:
        condition: service_healthy
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:8500/health"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 40s

  # Nginx for serving frontend (optional - can also serve via FastAPI)
  nginx:
    image: nginx:alpine
    container_name: langchain-agent-nginx
    networks:
      - app-network
    ports:
      - "${FRONTEND_PORT:-80}:80"
    volumes:
      - ../nginx.conf:/etc/nginx/nginx.conf:ro
      - ../frontend/dist:/usr/share/nginx/html:ro
    depends_on:
      - backend
    restart: unless-stopped

volumes:
  postgres_data:

networks:
  app-network:
    driver: bridge