services:
  db:
    image: postgres:15-alpine
    command: ["postgres", "-c", "max_connections=1000"]
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
      POSTGRES_DB: hackathon_db
    ports:
      - "5432:5432"
    volumes:
      - postgres_data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 5s
      timeout: 5s
      retries: 5
    restart: unless-stopped

  redis:
    image: redis:7-alpine
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 5s
      timeout: 5s
      retries: 5
    restart: unless-stopped

  app-1: &app-base
    build: .
    environment:
      - DATABASE_HOST=db
      - DATABASE_USER=postgres
      - DATABASE_PASSWORD=postgres
      - DATABASE_NAME=hackathon_db
      - DATABASE_PORT=5432
      - REDIS_URL=redis://redis:6379/0
      - ENABLE_STARTUP_SEED=true
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_healthy
    restart: unless-stopped

  app-2:
    <<: *app-base
    environment:
      - DATABASE_HOST=db
      - DATABASE_USER=postgres
      - DATABASE_PASSWORD=postgres
      - DATABASE_NAME=hackathon_db
      - DATABASE_PORT=5432
      - REDIS_URL=redis://redis:6379/0
      - ENABLE_STARTUP_SEED=false # Only one replica seeds the DB

  app-3:
    <<: *app-base
    environment:
      - DATABASE_HOST=db
      - DATABASE_USER=postgres
      - DATABASE_PASSWORD=postgres
      - DATABASE_NAME=hackathon_db
      - DATABASE_PORT=5432
      - REDIS_URL=redis://redis:6379/0
      - ENABLE_STARTUP_SEED=false

  nginx:
    image: nginx:alpine
    ports:
      - "8000:80"
    volumes:
      - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
    depends_on:
      - app-1
      - app-2
      - app-3
    restart: unless-stopped

  prometheus:
    image: prom/prometheus:latest
    ports:
      - "9090:9090"
    volumes:
      - ./monitoring/prometheus:/etc/prometheus:ro
      - prometheus_data:/prometheus
    command:
      - "--config.file=/etc/prometheus/prometheus.yml"
      - "--storage.tsdb.retention.time=7d"
    depends_on:
      - app-1
    restart: unless-stopped

  alertmanager:
    image: prom/alertmanager:latest
    ports:
      - "9093:9093"
    volumes:
      - ./monitoring/alertmanager:/etc/alertmanager:ro
    environment:
      - SLACK_WEBHOOK_URL=${SLACK_WEBHOOK_URL:-http://example.com/slack}
      - DISCORD_WEBHOOK_URL=${DISCORD_WEBHOOK_URL:-http://example.com/discord}
    entrypoint:
      - /bin/sh
      - -c
      - "sed \"s|SLACK_WEBHOOK_URL_PLACEHOLDER|$$SLACK_WEBHOOK_URL|g\" /etc/alertmanager/alertmanager.yml | sed \"s|DISCORD_WEBHOOK_URL_PLACEHOLDER|$$DISCORD_WEBHOOK_URL|g\" > /tmp/am.yml && exec /bin/alertmanager --config.file=/tmp/am.yml"
    restart: unless-stopped

volumes:
  postgres_data:
  prometheus_data: