version: '3.9'

services:
  postgres:
    image: postgres:15-alpine
    container_name: experiments_postgres
    restart: unless-stopped
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-expuser}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-exppassword}
      POSTGRES_DB: ${POSTGRES_DB:-experiments_db}
    volumes:
      - postgres_data:/var/lib/postgresql/data
    # Port NOT exposed to host — only reachable by backend via internal Docker network
    expose:
      - "5432"
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-expuser} -d ${POSTGRES_DB:-experiments_db}"]
      interval: 10s
      timeout: 5s
      retries: 5

  backend:
    build:
      context: ./backend
      target: prod
    container_name: experiments_backend
    restart: unless-stopped
    depends_on:
      postgres:
        condition: service_healthy
    environment:
      DATABASE_URL: postgresql://${POSTGRES_USER:-expuser}:${POSTGRES_PASSWORD:-exppassword}@postgres:5432/${POSTGRES_DB:-experiments_db}
      NODE_ENV: production
      PORT: 3001
      CORS_ORIGIN: "http://localhost:52867"
    # Non-root user set in Dockerfile; entrypoint runs migrations then starts server
    entrypoint: ["/bin/sh", "/app/docker-entrypoint.sh"]
    ports:
      - "3001:3001"
    healthcheck:
      test: ["CMD-SHELL", "wget -qO- http://127.0.0.1:3001/health || exit 1"]
      interval: 10s
      timeout: 5s
      retries: 10
      start_period: 40s

  frontend:
    build:
      context: ./frontend
      target: prod
    container_name: experiments_frontend
    restart: unless-stopped
    depends_on:
      backend:
        condition: service_healthy
    ports:
      - "52867:80"

volumes:
  postgres_data:
    name: experiments_postgres_data