# ================================================================
# docker-compose.yml  –  TruthLens / Fake-News Detector
# Open-source stack: FastAPI backend + React/Nginx frontend + MongoDB
# ================================================================
#
# Quick start:
#   1. cp .env.example .env     (fill in your API keys)
#   2. docker compose up --build
#   3. Open http://localhost  in your browser
# ================================================================

services:

  # ── MongoDB ──────────────────────────────────────────────────
  mongodb:
    image: mongo:7.0
    container_name: fakenews_mongodb
    restart: unless-stopped
    environment:
      MONGO_INITDB_ROOT_USERNAME: ${MONGO_ROOT_USER:-admin}
      MONGO_INITDB_ROOT_PASSWORD: ${MONGO_ROOT_PASSWORD:-changeme}
      MONGO_INITDB_DATABASE: ${DATABASE_NAME:-fake_news_detector}
    volumes:
      - mongo_data:/data/db
    ports:
      - "27017:27017"          # expose only for local development; remove in production
    healthcheck:
      test: ["CMD", "mongosh", "--eval", "db.adminCommand('ping')"]
      interval: 10s
      timeout: 5s
      retries: 5
      start_period: 20s

  # ── FastAPI backend ───────────────────────────────────────────
  backend:
    build:
      context: .
      dockerfile: Dockerfile
    container_name: fakenews_backend
    restart: unless-stopped
    env_file: .env
    environment:
      # Overrides anything in .env for the MongoDB URL (uses the container hostname)
      MONGODB_URL: mongodb://${MONGO_ROOT_USER:-admin}:${MONGO_ROOT_PASSWORD:-changeme}@mongodb:27017/${DATABASE_NAME:-fake_news_detector}?authSource=admin
      DATABASE_NAME: ${DATABASE_NAME:-fake_news_detector}
      # Allow requests from Nginx (same-origin in production, localhost during dev)
      ALLOWED_ORIGINS: "http://localhost,http://localhost:80,http://127.0.0.1,http://localhost:3000,http://localhost:5173"
    volumes:
      - ./logs:/app/logs           # persist logs on the host
    ports:
      - "8000:8000"                # expose for direct API access / debugging
    depends_on:
      mongodb:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:8000/health"]
      interval: 30s
      timeout: 10s
      retries: 5
      start_period: 90s            # BERT model loading takes ~60 s

  # ── React frontend (Nginx) ────────────────────────────────────
  frontend:
    build:
      context: ./frontend
      dockerfile: Dockerfile
      args:
        # All /api calls go to the same origin so the browser hits Nginx,
        # which proxies to the backend container.
        VITE_API_URL: /api
    container_name: fakenews_frontend
    restart: unless-stopped
    ports:
      - "80:80"                    # main entry point for users
    depends_on:
      backend:
        condition: service_healthy

# ── Named volumes ─────────────────────────────────────────────
volumes:
  mongo_data:
    driver: local