# ============================================================================
# Nerd Monitor Docker Compose Configuration
# ============================================================================
# 
# This file provides multiple ways to run Nerd Monitor:
#
# 1. Full Stack (Server + Agent):
#    docker-compose up
#
# 2. Server Only:
#    docker-compose up server
#
# 3. Agent Only (requires external server):
#    docker-compose up agent
#    (Set SERVER env var: SERVER=your-server:8080 docker-compose up agent)
#
# 4. Multiple Agents:
#    docker-compose up -d server
#    docker-compose run --name agent1 -e AGENT_ID=machine1 agent
#    docker-compose run --name agent2 -e AGENT_ID=machine2 agent
#
# ============================================================================

services:
  # =========================================================================
  # Nerd Monitor Server
  # =========================================================================
  # Web UI and API endpoint for collecting agent statistics
  #
  # Environment Variables:
  #   ADDR: Server bind address (default: 0.0.0.0)
  #   PORT: Server port (default: 8080)
  #   USERNAME: Admin username (default: admin)
  #   PASSWORD: Admin password (default: admin) - CHANGE IN PRODUCTION
  #
  server:
    build:
      context: .
      dockerfile: Dockerfile.server
    container_name: nerd-monitor-server
    ports:
      - "8080:8080"
    environment:
      # Server configuration
      ADDR: "0.0.0.0"
      PORT: "8080"
      # IMPORTANT: Change these credentials in production!
      USERNAME: "admin"
      PASSWORD: "admin"
    healthcheck:
      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost:8080/login"]
      interval: 30s
      timeout: 3s
      retries: 3
      start_period: 5s
    restart: unless-stopped
    networks:
      - nerd-monitor
    # Resource limits (optional, uncomment to enable)
    # deploy:
    #   resources:
    #     limits:
    #       cpus: '0.5'
    #       memory: 512M

  # =========================================================================
  # Nerd Monitor Agent
  # =========================================================================
  # Lightweight monitoring agent that reports system stats to the server
  #
  # Environment Variables:
  #   SERVER: Server address (default: server:8080 when using docker-compose)
  #   INTERVAL: Reporting interval (default: 15s)
  #   AGENT_ID: Optional agent identifier (auto-generated from hostname if empty)
  #
  # Note: This agent depends on the server being healthy before starting
  #
  agent:
    build:
      context: .
      dockerfile: Dockerfile.agent
    environment:
      # Agent configuration
      SERVER: "server:8080"        # Connect to the server service
      INTERVAL: "15s"              # Report stats every 15 seconds
      # AGENT_ID: "my-machine"     # Optional: set a custom agent ID
    depends_on:
      server:
        condition: service_healthy  # Wait for server to be healthy
    restart: unless-stopped
    networks:
      - nerd-monitor
    # Resource limits (optional, uncomment to enable)
    # deploy:
    #   resources:
    #     limits:
    #       cpus: '0.25'
    #       memory: 128M

networks:
  # Shared network for server and agent communication
  nerd-monitor:
    driver: bridge