# ---- Builder ----
FROM python:3.12-slim AS builder
WORKDIR /app
COPY requirements.txt .
RUN python -m venv /opt/venv \
    && /opt/venv/bin/pip install --no-cache-dir -r requirements.txt

# ---- Runtime ----
FROM python:3.12-slim
RUN groupadd -r django && useradd -r -g django django
COPY --from=builder /opt/venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"
WORKDIR /app
COPY src/ .
RUN python manage.py collectstatic --noinput
EXPOSE 8000
USER django
CMD ["gunicorn", "config.wsgi:application", "--bind", "0.0.0.0:8000", "--workers", "3"]

services:
  web:
    build: .
    ports:
      - "8000:8000"
    env_file: .env
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:8000/api/health/')"]
      interval: 10s
      retries: 3

  db:
    image: postgres:16-alpine
    environment:
      POSTGRES_DB: app_db
      POSTGRES_USER: app_user
      POSTGRES_PASSWORD: app_pass
    volumes:
      - pgdata:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U app_user -d app_db"]
      interval: 5s
      retries: 5

  redis:
    image: redis:7-alpine
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 5s
      retries: 5

  celery:
    build: .
    command: celery -A config worker -l info
    env_file: .env
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_healthy

volumes:
  pgdata: