version: '3.9'

# ================================================
# Math Platform - Production Docker Compose
# ================================================

services:
  # PostgreSQL Database
  postgres:
    image: postgres:15-alpine
    container_name: math-postgres
    environment:
      POSTGRES_USER: mathuser
      POSTGRES_PASSWORD: ${DB_PASSWORD}
      POSTGRES_DB: mathdb
      PGDATA: /var/lib/postgresql/data/pgdata
    volumes:
      - postgres_data:/var/lib/postgresql/data
      - ./docker/init-scripts:/docker-entrypoint-initdb.d:ro
    ports:
      - "5432:5432"
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U mathuser -d mathdb"]
      interval: 10s
      timeout: 5s
      retries: 5
      start_period: 10s
    networks:
      - math-network
    restart: unless-stopped
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"

  # Redis Cache & Queue
  redis:
    image: redis:7-alpine
    container_name: math-redis
    command: >
      redis-server
      --appendonly yes
      --maxmemory 256mb
      --maxmemory-policy allkeys-lru
      --tcp-backlog 511
      --timeout 0
      --tcp-keepalive 300
      ${REDIS_PASSWORD:+--requirepass $REDIS_PASSWORD}
    volumes:
      - redis_data:/data
    ports:
      - "6379:6379"
    healthcheck:
      test: ["CMD", "redis-cli", "--raw", "incr", "ping"]
      interval: 10s
      timeout: 3s
      retries: 5
      start_period: 10s
    networks:
      - math-network
    restart: unless-stopped
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"

  # Backend API
  backend:
    build:
      context: .
      dockerfile: docker/Dockerfile.backend
      cache_from:
        - math-backend:${VERSION:-1.0.0}
    image: math-backend:${VERSION:-1.0.0}
    container_name: math-backend
    environment:
      NODE_ENV: production
      DATABASE_URL: postgresql://mathuser:${DB_PASSWORD}@postgres:5432/mathdb
      REDIS_HOST: redis
      REDIS_PORT: 6379
      REDIS_PASSWORD: ${REDIS_PASSWORD}
      AI_API_BASE_URL: ${AI_API_BASE_URL}
      AI_API_KEY: ${AI_API_KEY}
      AI_MODEL: ${AI_MODEL}
      TELEGRAM_BOT_TOKEN: ${TELEGRAM_BOT_TOKEN}
      TELEGRAM_ADMIN_CHAT_ID: ${TELEGRAM_ADMIN_CHAT_ID}
      JWT_SECRET: ${JWT_SECRET}
      JWT_EXPIRES_IN: ${JWT_EXPIRES_IN:-15m}
      BACKEND_PORT: 3001
      LOG_LEVEL: ${LOG_LEVEL:-info}
      CORS_ORIGIN: http://localhost:3000,http://localhost
      AUTH_RATE_LIMIT_WINDOW_MS: ${AUTH_RATE_LIMIT_WINDOW_MS:-900000}
      AUTH_RATE_LIMIT_MAX: ${AUTH_RATE_LIMIT_MAX:-20}
    volumes:
      - backend_logs:/app/logs
      - ./pdfs:/app/pdfs:ro
    ports:
      - "3001:3001"
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:3001/health"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 40s
    networks:
      - math-network
    restart: unless-stopped
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"
    deploy:
      resources:
        limits:
          cpus: '1'
          memory: 1G
        reservations:
          cpus: '0.5'
          memory: 512M

  # Frontend (Next.js)
  frontend:
    build:
      context: .
      dockerfile: docker/Dockerfile.frontend
      cache_from:
        - math-frontend:${VERSION:-1.0.0}
    image: math-frontend:${VERSION:-1.0.0}
    container_name: math-frontend
    environment:
      NODE_ENV: production
      NEXT_PUBLIC_API_URL: ${NEXT_PUBLIC_API_URL:-http://localhost:3001}
      NEXT_PUBLIC_APP_NAME: ${NEXT_PUBLIC_APP_NAME:-Plataforma de Álgebra Lineal}
    ports:
      - "3000:3000"
    depends_on:
      backend:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:3000"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 40s
    networks:
      - math-network
    restart: unless-stopped
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"
    deploy:
      resources:
        limits:
          cpus: '0.5'
          memory: 512M
        reservations:
          cpus: '0.25'
          memory: 256M

  # PDF Processing Worker
  pdf-worker:
    build:
      context: .
      dockerfile: docker/Dockerfile.worker
      target: pdf-worker
      cache_from:
        - math-worker:${VERSION:-1.0.0}
    image: math-worker:${VERSION:-1.0.0}
    container_name: math-pdf-worker
    environment:
      NODE_ENV: production
      DATABASE_URL: postgresql://mathuser:${DB_PASSWORD}@postgres:5432/mathdb
      REDIS_HOST: redis
      REDIS_PORT: 6379
      REDIS_PASSWORD: ${REDIS_PASSWORD}
      WORKER_TYPE: pdf
      LOG_LEVEL: ${LOG_LEVEL:-info}
    volumes:
      - worker_logs:/app/logs
      - ./pdfs:/app/pdfs:ro
      - ./pdfs/processed:/app/pdfs/processed
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
    networks:
      - math-network
    restart: unless-stopped
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"
    deploy:
      resources:
        limits:
          cpus: '0.5'
          memory: 512M
        reservations:
          cpus: '0.25'
          memory: 256M

  # Exercise Generation Worker (AI)
  exercise-worker:
    build:
      context: .
      dockerfile: docker/Dockerfile.worker
      target: exercise-worker
      cache_from:
        - math-worker:${VERSION:-1.0.0}
    image: math-worker:${VERSION:-1.0.0}
    container_name: math-exercise-worker
    environment:
      NODE_ENV: production
      DATABASE_URL: postgresql://mathuser:${DB_PASSWORD}@postgres:5432/mathdb
      REDIS_HOST: redis
      REDIS_PORT: 6379
      REDIS_PASSWORD: ${REDIS_PASSWORD}
      AI_API_BASE_URL: ${AI_API_BASE_URL}
      AI_API_KEY: ${AI_API_KEY}
      AI_MODEL: ${AI_MODEL}
      WORKER_TYPE: exercise
      LOG_LEVEL: ${LOG_LEVEL:-info}
    volumes:
      - worker_logs:/app/logs
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
    networks:
      - math-network
    restart: unless-stopped
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"
    deploy:
      resources:
        limits:
          cpus: '0.5'
          memory: 512M
        reservations:
          cpus: '0.25'
          memory: 256M

  # Notification Worker (Telegram)
  notification-worker:
    build:
      context: .
      dockerfile: docker/Dockerfile.worker
      target: notification-worker
      cache_from:
        - math-worker:${VERSION:-1.0.0}
    image: math-worker:${VERSION:-1.0.0}
    container_name: math-notification-worker
    environment:
      NODE_ENV: production
      DATABASE_URL: postgresql://mathuser:${DB_PASSWORD}@postgres:5432/mathdb
      REDIS_HOST: redis
      REDIS_PORT: 6379
      REDIS_PASSWORD: ${REDIS_PASSWORD}
      TELEGRAM_BOT_TOKEN: ${TELEGRAM_BOT_TOKEN}
      TELEGRAM_ADMIN_CHAT_ID: ${TELEGRAM_ADMIN_CHAT_ID}
      WORKER_TYPE: notification
      LOG_LEVEL: ${LOG_LEVEL:-info}
    volumes:
      - worker_logs:/app/logs
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
    networks:
      - math-network
    restart: unless-stopped
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"
    deploy:
      resources:
        limits:
          cpus: '0.25'
          memory: 256M
        reservations:
          cpus: '0.1'
          memory: 128M

  # Nginx Reverse Proxy
  nginx:
    image: nginx:1.25.3-alpine
    container_name: math-nginx
    volumes:
      - ./docker/nginx.conf:/etc/nginx/nginx.conf:ro
      - ./docker/logs:/var/log/nginx
      - ./docker/ssl:/etc/nginx/ssl:ro
    ports:
      - "80:80"
      - "443:443"
    depends_on:
      frontend:
        condition: service_healthy
      backend:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost/health"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 10s
    networks:
      - math-network
    restart: unless-stopped
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"
    deploy:
      resources:
        limits:
          cpus: '0.25'
          memory: 128M
        reservations:
          cpus: '0.1'
          memory: 64M

# Named volumes for data persistence
volumes:
  postgres_data:
    driver: local
  redis_data:
    driver: local
  backend_logs:
    driver: local
  worker_logs:
    driver: local

# Network configuration
networks:
  math-network:
    driver: bridge
    ipam:
      config:
        - subnet: 172.20.0.0/16