# Metasearch Module - Docker Compose Configuration
#
# Architecture:
#   nginx (load balancer) -> 3x SearXNG instances + dedicated Redis each
#   Round-robin distributes requests to avoid CAPTCHA/rate-limits
#
# Port Allocation (x55xx = Backend Services / Search):
#   55100 - nginx load balancer (entry point)
#
# Naming Convention: didiAI-{module}-{service}
#
# Network:
#   Uses deploy_default network (shared with other modules)

networks:
  didi-network:
    external: true   # single shared network for all DIDI + AI platform stacks

services:
  # ==========================================================================
  # Nginx Load Balancer (entry point)
  # ==========================================================================
  searxng-lb:
    container_name: didiAI-web-searxng
    image: nginx:1.27-alpine
    ports:
      - "${SEARXNG_PORT:-55100}:8080"
    networks:
      - didi-network
    volumes:
      - ./nginx-lb.conf:/etc/nginx/nginx.conf:ro
    depends_on:
      searxng-1:
        condition: service_healthy
      searxng-2:
        condition: service_healthy
      searxng-3:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "wget", "-q", "-O", "/dev/null", "http://127.0.0.1:8080/healthz"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 10s
    restart: unless-stopped

  # ==========================================================================
  # SearXNG Instance 1
  # ==========================================================================
  searxng-1:
    container_name: didiAI-web-searxng-1
    image: docker.io/searxng/searxng:latest
    networks:
      - didi-network
    volumes:
      - ./searxng-1:/etc/searxng:rw
      - searxng-data-1:/var/cache/searxng:rw
    environment:
      - SEARXNG_BASE_URL=http://localhost:55100
    depends_on:
      redis-1:
        condition: service_healthy
      tor:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "wget", "-q", "--spider", "http://localhost:8080/healthz"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 30s
    restart: unless-stopped

  # ==========================================================================
  # SearXNG Instance 2
  # ==========================================================================
  searxng-2:
    container_name: didiAI-web-searxng-2
    image: docker.io/searxng/searxng:latest
    networks:
      - didi-network
    volumes:
      - ./searxng-2:/etc/searxng:rw
      - searxng-data-2:/var/cache/searxng:rw
    environment:
      - SEARXNG_BASE_URL=http://localhost:55100
    depends_on:
      redis-2:
        condition: service_healthy
      tor:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "wget", "-q", "--spider", "http://localhost:8080/healthz"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 30s
    restart: unless-stopped

  # ==========================================================================
  # SearXNG Instance 3
  # ==========================================================================
  searxng-3:
    container_name: didiAI-web-searxng-3
    image: docker.io/searxng/searxng:latest
    networks:
      - didi-network
    volumes:
      - ./searxng-3:/etc/searxng:rw
      - searxng-data-3:/var/cache/searxng:rw
    environment:
      - SEARXNG_BASE_URL=http://localhost:55100
    depends_on:
      redis-3:
        condition: service_healthy
      tor:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "wget", "-q", "--spider", "http://localhost:8080/healthz"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 30s
    restart: unless-stopped

  # ==========================================================================
  # Tor SOCKS5 proxy (shared by all SearXNG instances)
  # ==========================================================================
  tor:
    container_name: didiAI-web-tor
    image: dperson/torproxy:latest
    networks:
      - didi-network
    environment:
      - TOR_MaxCircuitDirtiness=300
      - TOR_NewCircuitPeriod=60
    healthcheck:
      test: ["CMD", "curl", "-sf", "--socks5-hostname", "127.0.0.1:9050", "https://check.torproject.org/api/ip"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 30s
    restart: unless-stopped

  # ==========================================================================
  # Redis instances (one per SearXNG for isolated cache/state)
  # ==========================================================================
  redis-1:
    container_name: didiAI-web-searxng-redis-1
    image: docker.io/valkey/valkey:8-alpine
    command: valkey-server --save 30 1 --loglevel warning
    networks:
      - didi-network
    volumes:
      - searxng-redis-data-1:/data
    healthcheck:
      test: ["CMD", "valkey-cli", "ping"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 10s
    restart: unless-stopped

  redis-2:
    container_name: didiAI-web-searxng-redis-2
    image: docker.io/valkey/valkey:8-alpine
    command: valkey-server --save 30 1 --loglevel warning
    networks:
      - didi-network
    volumes:
      - searxng-redis-data-2:/data
    healthcheck:
      test: ["CMD", "valkey-cli", "ping"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 10s
    restart: unless-stopped

  redis-3:
    container_name: didiAI-web-searxng-redis-3
    image: docker.io/valkey/valkey:8-alpine
    command: valkey-server --save 30 1 --loglevel warning
    networks:
      - didi-network
    volumes:
      - searxng-redis-data-3:/data
    healthcheck:
      test: ["CMD", "valkey-cli", "ping"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 10s
    restart: unless-stopped

volumes:
  searxng-data-1:
  searxng-data-2:
  searxng-data-3:
  searxng-redis-data-1:
  searxng-redis-data-2:
  searxng-redis-data-3: