# Production-oriented topology (section 1/28): Traefik -> N stateless API
# replicas -> PgBouncer -> PostgreSQL, plus Redis and independently-scaled
# workers. Requires a pre-existing external Traefik network named
# `traefik-public` and a populated `.env` (never commit real secrets).
name: aurora-core

networks:
  traefik-public:
    external: true
  aurora-internal:
    driver: bridge

services:
  postgres:
    image: postgres:17-alpine
    restart: unless-stopped
    env_file: .env
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-aurora}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
      POSTGRES_DB: ${POSTGRES_DB:-aurora_core}
    volumes:
      - aurora_postgres_data:/var/lib/postgresql/data
    networks: [aurora-internal]
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-aurora}"]
      interval: 5s
      timeout: 5s
      retries: 10
    deploy:
      resources:
        limits: { cpus: "2", memory: 2G }

  pgbouncer:
    image: edoburu/pgbouncer:latest
    restart: unless-stopped
    environment:
      DATABASE_URL: postgres://${POSTGRES_USER:-aurora}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB:-aurora_core}
      POOL_MODE: transaction
      MAX_CLIENT_CONN: "1000"
      DEFAULT_POOL_SIZE: "25"
    depends_on:
      postgres:
        condition: service_healthy
    networks: [aurora-internal]
    healthcheck:
      test: ["CMD", "pg_isready", "-h", "localhost", "-p", "5432"]
      interval: 10s
      timeout: 5s
      retries: 10

  redis:
    image: redis:7-alpine
    restart: unless-stopped
    command: ["redis-server", "--maxmemory", "512mb", "--maxmemory-policy", "allkeys-lru"]
    volumes:
      - aurora_redis_data:/data
    networks: [aurora-internal]
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 5s
      timeout: 5s
      retries: 10

  migrate:
    build:
      context: .
      dockerfile: docker/api.Dockerfile
    env_file: .env
    environment:
      DATABASE_URL_SYNC: postgresql+psycopg2://${POSTGRES_USER:-aurora}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB:-aurora_core}
    depends_on:
      postgres:
        condition: service_healthy
    networks: [aurora-internal]
    entrypoint: ["alembic"]
    command: ["upgrade", "head"]

  api:
    build:
      context: .
      dockerfile: docker/api.Dockerfile
    restart: unless-stopped
    env_file: .env
    environment:
      AURORA_ENV: production
      DATABASE_BEHIND_TRANSACTION_POOLER: "true"
      DATABASE_URL: postgresql+asyncpg://${POSTGRES_USER:-aurora}:${POSTGRES_PASSWORD}@pgbouncer:5432/${POSTGRES_DB:-aurora_core}
      REDIS_URL: redis://redis:6379/0
    depends_on:
      pgbouncer:
        condition: service_healthy
      redis:
        condition: service_healthy
      migrate:
        condition: service_completed_successfully
    networks: [traefik-public, aurora-internal]
    deploy:
      replicas: 3
      resources:
        limits: { cpus: "1", memory: 1G }
      labels:
        - "traefik.enable=true"
        - "traefik.docker.network=traefik-public"
        - "traefik.http.routers.aurora-core-api.rule=Host(`${AURORA_API_HOST:-api.aurora.local}`)"
        - "traefik.http.routers.aurora-core-api.entrypoints=websecure"
        - "traefik.http.routers.aurora-core-api.tls.certresolver=letsencrypt"
        - "traefik.http.services.aurora-core-api.loadbalancer.server.port=8000"
        - "traefik.http.services.aurora-core-api.loadbalancer.healthcheck.path=/health"

  worker:
    build:
      context: .
      dockerfile: docker/worker.Dockerfile
    restart: unless-stopped
    env_file: .env
    environment:
      AURORA_ENV: production
      DATABASE_BEHIND_TRANSACTION_POOLER: "true"
      DATABASE_URL: postgresql+asyncpg://${POSTGRES_USER:-aurora}:${POSTGRES_PASSWORD}@pgbouncer:5432/${POSTGRES_DB:-aurora_core}
      REDIS_URL: redis://redis:6379/0
    depends_on:
      pgbouncer:
        condition: service_healthy
      redis:
        condition: service_healthy
      migrate:
        condition: service_completed_successfully
    networks: [aurora-internal]
    deploy:
      replicas: 2
      resources:
        limits: { cpus: "1", memory: 1G }

volumes:
  aurora_postgres_data:
  aurora_redis_data: