docker-compose.yml

# ─────────────────────────────────────────────────────────────────────────────
# Ingrexa — docker-compose.yml
# ─────────────────────────────────────────────────────────────────────────────
# Spins up 5 services with a single command: docker-compose up
#   1. db              — PostgreSQL database
#   2. redis           — Redis broker + cache + result backend
#   3. backend         — Django REST Framework (Gunicorn)
#   4. celery_worker   — Celery worker for AI analysis tasks (heavy queue)
#   5. celery_email    — Celery worker for email tasks (lightweight queue)
#   6. frontend        — React + Vite dev server (or nginx in production)
# ─────────────────────────────────────────────────────────────────────────────

version: '3.9'

services:

  # ── 1. PostgreSQL Database ─────────────────────────────────────────────────
  db:
    image: postgres:16-alpine
    container_name: ingrexa_db
    restart: unless-stopped
    environment:
      POSTGRES_DB: ingrexa
      POSTGRES_USER: ingrexa_user
      POSTGRES_PASSWORD: ingrexa_pass # Change in production!
    volumes:
      - postgres_data:/var/lib/postgresql/data # Persist data between restarts
    ports:
      - "5432:5432"
    healthcheck:
      test: [ "CMD-SHELL", "pg_isready -U ingrexa_user -d ingrexa" ]
      interval: 10s
      timeout: 5s
      retries: 5

  # ── 2. Redis (Broker + Cache + Result Backend) ─────────────────────────────
  redis:
    image: redis:7-alpine
    container_name: ingrexa_redis
    restart: unless-stopped
    ports:
      - "6379:6379"
    volumes:
      - redis_data:/data
    command: redis-server --appendonly yes   # Persist task queue to disk
    healthcheck:
      test: [ "CMD", "redis-cli", "ping" ]
      interval: 10s
      timeout: 5s
      retries: 5

  # ── 3. Django Backend ──────────────────────────────────────────────────────
  backend:
    build:
      context: ./backend
      dockerfile: Dockerfile
    container_name: ingrexa_backend
    restart: unless-stopped
    env_file:
      - ./backend/.env # Your real secrets live here (gitignored)
    environment:
      DATABASE_URL: postgresql://ingrexa_user:ingrexa_pass@db:5432/ingrexa
      REDIS_URL: redis://redis:6379/0
      CELERY_BROKER_URL: redis://redis:6379/0
      CELERY_RESULT_BACKEND: redis://redis:6379/1
      DEBUG: "False"
      ALLOWED_HOSTS: "localhost,127.0.0.1,backend"
    ports:
      - "8000:8000"
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_healthy
    volumes:
      - ./backend:/app
      - media_files:/app/media
    command: >
      sh -c "python manage.py migrate &&
             python manage.py collectstatic --noinput &&
             gunicorn foodview_api.wsgi:application
             --bind 0.0.0.0:8000
             --workers 4
             --timeout 120
             --log-level info"

  # ── 4. Celery Worker — AI Analysis Queue (heavy tasks) ────────────────────
  celery_worker:
    build:
      context: ./backend
      dockerfile: Dockerfile
    container_name: ingrexa_celery_analysis
    restart: unless-stopped
    env_file:
      - ./backend/.env
    environment:
      DATABASE_URL: postgresql://ingrexa_user:ingrexa_pass@db:5432/ingrexa
      REDIS_URL: redis://redis:6379/0
      CELERY_BROKER_URL: redis://redis:6379/0
      CELERY_RESULT_BACKEND: redis://redis:6379/1
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_healthy
    volumes:
      - ./backend:/app
      - media_files:/app/media
    # concurrency=2: 2 parallel AI analysis tasks max (memory-intensive)
    command: >
      celery -A foodview_api worker
      --loglevel=info
      --queues=analysis
      --concurrency=2
      --hostname=worker-analysis@%h

  # ── 5. Celery Worker — Email Queue (lightweight tasks) ────────────────────
  celery_email:
    build:
      context: ./backend
      dockerfile: Dockerfile
    container_name: ingrexa_celery_email
    restart: unless-stopped
    env_file:
      - ./backend/.env
    environment:
      DATABASE_URL: postgresql://ingrexa_user:ingrexa_pass@db:5432/ingrexa
      REDIS_URL: redis://redis:6379/0
      CELERY_BROKER_URL: redis://redis:6379/0
      CELERY_RESULT_BACKEND: redis://redis:6379/1
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_healthy
    volumes:
      - ./backend:/app
    # concurrency=4: emails are fast I/O, we can handle more in parallel
    command: >
      celery -A foodview_api worker
      --loglevel=info
      --queues=email
      --concurrency=4
      --hostname=worker-email@%h

  # ── 6. React Frontend ──────────────────────────────────────────────────────
  frontend:
    image: node:20-alpine
    container_name: ingrexa_frontend
    working_dir: /app
    volumes:
      - ./frontend:/app
      - /app/node_modules # Prevent host node_modules from bleeding in
    ports:
      - "3000:3000"
    environment:
      VITE_API_URL: "http://localhost:8000"
    command: sh -c "npm install && npm run dev -- --host 0.0.0.0"
    depends_on:
      - backend

# ── Named Volumes ──────────────────────────────────────────────────────────
volumes:
  postgres_data: # Database files (persisted)
  redis_data:    # Redis AOF / RDB snapshots (persisted)
  media_files:   # Uploaded images/media (persisted)