version: "3.9"

services:
  db:
    image: mysql:8.0
    container_name: honey-mysql
    restart: always
    # Database credentials are read from the secret file via backend container
    # The backend will construct the connection URL from SPRING_DATASOURCE_* properties
    # For MySQL container, we need to set these via environment or use a separate secret
    # Option 1: Use environment variables (for MySQL container only)
    # Note: MYSQL_USER cannot be "root" - root user is configured via MYSQL_ROOT_PASSWORD only
    environment:
      MYSQL_DATABASE: honey_db
      MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
    # Option 2: Mount secret file and read values (more secure)
    # This requires parsing the secret file or using a script
    # For simplicity, we'll use environment variables for MySQL container
    # The secret file is primarily for the backend application
    # Do NOT expose MySQL port to host - only accessible within Docker network
    # ports:
    #   - "3306:3306"
    volumes:
      - mysql_data:/var/lib/mysql
      # Mount MySQL performance configuration (created on VPS at /opt/app/mysql/conf/my.cnf)
      - /opt/app/mysql/conf/my.cnf:/etc/mysql/conf.d/my.cnf:ro
    # Resource limits for MySQL (16GB buffer pool + 2GB overhead)
    deploy:
      resources:
        limits:
          cpus: '2.0'
          memory: 18G
    healthcheck:
      # Use shell to access environment variable (Docker Compose doesn't interpolate in healthcheck arrays)
      test: ["CMD-SHELL", "mysqladmin ping -h localhost -u root -p$$MYSQL_ROOT_PASSWORD || exit 1"]
      interval: 10s
      timeout: 5s
      retries: 5
    networks:
      - honey-network

  backend:
    build:
      context: .
      dockerfile: Dockerfile
    container_name: honey-backend
    depends_on:
      db:
        condition: service_healthy
    # Expose backend port to localhost only (for Nginx on host to access)
    # This is safe - only accessible from the host, not from internet
    # Port 8080 is the primary/active backend
    ports:
      - "127.0.0.1:8080:8080"
    # Labels for rolling update management
    labels:
      - "deployment.role=primary"
      - "deployment.version=current"
    volumes:
      # Mount persistent avatar storage (absolute path for consistency)
      - /opt/app/data/avatars:/app/data/avatars
      # Mount secret configuration file (read-only)
      - /run/secrets/honey-config.properties:/run/secrets/honey-config.properties:ro
      # Mount logback config directory (editable on VPS without rebuilding)
      # Note: File must exist on host before mounting. Run setup-logging.sh first.
      - /opt/app/backend/config:/app/config:rw
      # Mount logs directory (persistent storage)
      - /opt/app/logs:/app/logs
    environment:
      # Java memory settings: 10GB heap (Xms/Xmx) + G1GC for low latency
      # -Xms: Start with 10GB (prevents resizing overhead)
      # -Xmx: Max limit 10GB
      # -XX:+UseG1GC: Use G1 garbage collector (best for large heaps)
      # -XX:MaxGCPauseMillis=200: Target max GC pause time
      JAVA_OPTS: -Xms10g -Xmx10g -XX:+UseG1GC -XX:MaxGCPauseMillis=200
      # Logging configuration (external logback-spring.xml)
      LOGGING_CONFIG: /app/config/logback-spring.xml
      LOG_DIR: /app/logs
    # Resource limits for backend (10GB heap + 2GB overhead for stack/metaspace)
    deploy:
      resources:
        limits:
          cpus: '4.0'
          memory: 12G
    networks:
      - honey-network
    restart: always
    healthcheck:
      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost:8080/actuator/health/liveness"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 60s

  backend-new:
    # This service is used during rolling updates
    # It will be started manually via deployment script
    build:
      context: .
      dockerfile: Dockerfile
    container_name: honey-backend-new
    depends_on:
      db:
        condition: service_healthy
    # Port 8082 is the new/standby backend during deployment (8081 is used by phpMyAdmin)
    ports:
      - "127.0.0.1:8082:8080"
    profiles:
      - rolling-update
    # Labels for rolling update management
    labels:
      - "deployment.role=standby"
      - "deployment.version=new"
    volumes:
      # Mount persistent avatar storage (absolute path for consistency)
      - /opt/app/data/avatars:/app/data/avatars
      # Mount secret configuration file (read-only)
      - /run/secrets/honey-config.properties:/run/secrets/honey-config.properties:ro
      # Mount logback config directory (editable on VPS without rebuilding)
      # Note: File must exist on host before mounting. Run setup-logging.sh first.
      - /opt/app/backend/config:/app/config:rw
      # Mount logs directory (persistent storage)
      - /opt/app/logs:/app/logs
    environment:
      # Java memory settings: 10GB heap (Xms/Xmx) + G1GC for low latency
      # -Xms: Start with 10GB (prevents resizing overhead)
      # -Xmx: Max limit 10GB
      # -XX:+UseG1GC: Use G1 garbage collector (best for large heaps)
      # -XX:MaxGCPauseMillis=200: Target max GC pause time
      JAVA_OPTS: -Xms10g -Xmx10g -XX:+UseG1GC -XX:MaxGCPauseMillis=200
      # Logging configuration (external logback-spring.xml)
      LOGGING_CONFIG: /app/config/logback-spring.xml
      LOG_DIR: /app/logs
    # Resource limits for backend (10GB heap + 2GB overhead for stack/metaspace)
    deploy:
      resources:
        limits:
          cpus: '4.0'
          memory: 12G
    networks:
      - honey-network
    restart: always
    healthcheck:
      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost:8080/actuator/health/liveness"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 60s


  phpmyadmin:
    image: phpmyadmin:latest
    container_name: honey-phpmyadmin
    restart: always
    depends_on:
      db:
        condition: service_healthy
    # Expose phpMyAdmin to localhost only (Nginx will proxy it with path protection)
    ports:
      - "127.0.0.1:8081:80"
    environment:
      # Connect to MySQL service using Docker service name
      PMA_HOST: db
      PMA_PORT: 3306
      # Use the same root password as MySQL container
      MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
      # Security: Set upload limit
      UPLOAD_LIMIT: 64M
      # Configure absolute URI so phpMyAdmin generates correct URLs for assets
      # This variable must be set from a secret file on the VPS (not in git)
      # Example: export PMA_ABSOLUTE_URI="https://win-spin.live/your-secret-path"
      PMA_ABSOLUTE_URI: ${PMA_ABSOLUTE_URI:-}
      # Tell phpMyAdmin it's behind a proxy using HTTPS
      PMA_SSL: "true"
      # Trust proxy headers (X-Forwarded-Proto, etc.)
      PMA_TRUSTED_PROXIES: "127.0.0.1"
    networks:
      - honey-network
    # Resource limits for phpMyAdmin
    deploy:
      resources:
        limits:
          cpus: '1.0'
          memory: 512M

volumes:
  mysql_data:
    driver: local

networks:
  honey-network:
    driver: bridge