# ============================================================================
# FlowSentinel - Docker Compose Configuration
# ============================================================================
# This docker-compose file provides easy development and deployment setup.
#
# Usage:
#   Development (with hot reload):  docker-compose up
#   Production:                     docker-compose -f docker-compose.yml up
#   Build from scratch:             docker-compose build --no-cache
#   Stop services:                  docker-compose down
#   Database only:                  docker-compose up postgres
# ============================================================================

version: '3.8'

services:
  # --------------------------------------------------------------------------
  # PostgreSQL Database Service
  # --------------------------------------------------------------------------
  postgres:
    image: postgres:15-alpine
    container_name: flowsentinel-db
    
    # PostgreSQL configuration
    environment:
      POSTGRES_USER: flowsentinel
      POSTGRES_PASSWORD: flowsentinel123
      POSTGRES_DB: flowsentinel
      PGDATA: /var/lib/postgresql/data/pgdata
    
    # Port mapping (host:container)
    ports:
      - "5432:5432"
    
    # Persistent data storage
    volumes:
      - flowsentinel-db-data:/var/lib/postgresql/data
      - ./scripts/init-db.sql:/docker-entrypoint-initdb.d/init-db.sql
    
    # Health check
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U flowsentinel -d flowsentinel"]
      interval: 10s
      timeout: 5s
      retries: 5
      start_period: 10s
    
    # Restart policy
    restart: unless-stopped
    
    # Network
    networks:
      - flowsentinel-network
    
    # Logging
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"

  # --------------------------------------------------------------------------
  # FlowSentinel Backend Service
  # --------------------------------------------------------------------------
  flowsentinel-backend:
    # Build configuration
    build:
      context: .
      dockerfile: Dockerfile
    
    # Container name
    container_name: flowsentinel-api
    
    # Port mapping (host:container)
    ports:
      - "8000:8000"
    
    # Environment variables
    # Option 1: Load from .env file (recommended)
    env_file:
      - .env
    
    # Option 2: Specify environment variables directly (uncomment if needed)
    environment:
      - DATABASE_URL=postgresql://flowsentinel:flowsentinel123@postgres:5432/flowsentinel
    
    # Depends on database
    depends_on:
      postgres:
        condition: service_healthy
    
    # Volume mounts for development (hot reload)
    # Comment out for production deployment
    volumes:
      - ./src:/app/src
      - ./tests:/app/tests
      # Note: .env is NOT mounted for security (use env_file instead)
    
    # Health check configuration
    healthcheck:
      test: ["CMD", "python", "-c", "import requests; requests.get('http://localhost:8000/health', timeout=3)"]
      interval: 30s
      timeout: 5s
      retries: 3
      start_period: 10s
    
    # Restart policy
    restart: unless-stopped
    
    # Resource limits (optional, adjust based on your needs)
    deploy:
      resources:
        limits:
          cpus: '1.0'
          memory: 512M
        reservations:
          cpus: '0.5'
          memory: 256M
    
    # Network configuration
    networks:
      - flowsentinel-network
    
    # Logging configuration
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "3"

# --------------------------------------------------------------------------
# Networks
# --------------------------------------------------------------------------
networks:
  flowsentinel-network:
    driver: bridge
    name: flowsentinel-network

# --------------------------------------------------------------------------
# Volumes (for persistent storage)
# --------------------------------------------------------------------------
volumes:
  flowsentinel-db-data:
    name: flowsentinel-db-data
    driver: local