# .gitea/workflows/deploy.yml

name: Build and Deploy Backend
run-name: ${{ gitea.actor }} deploying backend on Gitea Actions 🚀

on:
  # Triggers the workflow on push events but only for the main branch
  push:
    branches: [ main ]
    paths:
      - 'backend/**'
      - 'interfaces/nativeapp/**'
      - '.gitea/workflows/deploy.yml'
      - 'backend/docker-compose.deploy.yml'

  # Allows running of this workflow manually from the Actions tab
  workflow_dispatch:

  # Ensures the project will never be out of date by running a cron for this job
  # Currently set to every Sunday at 3 AM UTC
  schedule:
    - cron: '0 3 * * 0'

jobs:
  # ========================================================================
  # Job to run backend unit tests.
  # ========================================================================
  test-backend:
    name: Run Linters and Tests (Backend)
    runs-on: ubuntu-latest
    steps:
      # Checks out the repo under $GITHUB_WORKSPACE
      - name: Checkout code
        uses: actions/checkout@v4

      # Sets up Python 3.12 environment
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.12'
          
      # Cache pip dependencies for faster reruns
      # - name: Cache pip dependencies
      #   uses: actions/cache@v3
      #   with:
      #     path: ~/.cache/pip
      #     key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements*.txt') }}
      #     restore-keys: |
      #       ${{ runner.os }}-pip-

      - name: Install dependencies
        working-directory: ./backend
        run: |
          python -m pip install --upgrade pip
          pip install -r requirements.txt
          pip install -r requirements-dev.txt

      - name: Lint with Ruff
        working-directory: ./backend
        run: |
          ruff check .

      - name: Check formatting with Black
        working-directory: ./backend
        run: |
          black --check .

      - name: Run Pytest
        working-directory: ./backend
        run: |
          pytest

  # ========================================================================
  # Job to build the backend Docker image.
  # ========================================================================
  build-backend:
    name: Build (Backend)
    runs-on: ubuntu-latest
    needs: test-backend # Ensure tests pass before deploying

    # Only run this job if triggered by a push to main or manual dispatch/schedule
    if: gitea.event_name == 'push' || gitea.event_name == 'workflow_dispatch' || gitea.event_name == 'schedule'

    steps:
      # Checks out the repo under $GITHUB_WORKSPACE
      - name: Checkout code
        uses: actions/checkout@v4

      # ------------------------------------------------------------------
      # Login to Container Registry (Using GHCR)
      # ------------------------------------------------------------------
      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ secrets.DOCKER_REGISTRY_USERNAME }} # Uses the username stored in secrets
          password: ${{ secrets.DOCKER_REGISTRY_TOKEN }} # Uses the PAT stored in secrets

      # ------------------------------------------------------------------
      # Set up Docker Buildx for advanced build features
      # ------------------------------------------------------------------
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      # ------------------------------------------------------------------
      # Build and Push Docker Image
      # ------------------------------------------------------------------
      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: ./backend
          file: ./backend/Dockerfile # Explicit path to Dockerfile
          push: true # Push the image after building
          tags: | # Use SHA for version specific, latest for general
            ghcr.io/${{ secrets.DOCKER_REGISTRY_USERNAME }}/maia:${{ gitea.sha }}
            ghcr.io/${{ secrets.DOCKER_REGISTRY_USERNAME }}/maia:latest
          # Pull latest base image updates when building (good for scheduled runs)
          pull: true

  # ========================================================================
  # Job to build the frontend Nginx image.
  # ========================================================================
  build-frontend-web:
    name: Build (Frontend Web)
    runs-on: ubuntu-latest
    # needs: test-frontend
    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch' || github.event_name == 'schedule'
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '18'

      - name: Install frontend dependencies
        working-directory: ./interfaces/nativeapp
        run: npm ci

      - name: Build Expo web assets
        working-directory: ./interfaces/nativeapp
        run: npx expo export --platform web --output-dir dist

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ secrets.DOCKER_REGISTRY_USERNAME }}
          password: ${{ secrets.DOCKER_REGISTRY_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Build and push frontend nginx image
        uses: docker/build-push-action@v5
        with:
          # Context is the frontend dir where Dockerfile.nginx, nginx.conf and dist/ are
          context: ./interfaces/nativeapp
          file: ./interfaces/nativeapp/Dockerfile.nginx # Path to the Nginx Dockerfile
          push: true
          tags: |
            ghcr.io/${{ secrets.DOCKER_REGISTRY_USERNAME }}/maia-frontend:${{ gitea.sha }}
            ghcr.io/${{ secrets.DOCKER_REGISTRY_USERNAME }}/maia-frontend:latest
          pull: true # Pull base nginx image updates


  # ========================================================================
  # Build Native Android App (Trigger EAS Build)
  # ========================================================================
  build-native-android:
    name: Build Native Android App (EAS)
    runs-on: ubuntu-latest
    # needs: test-frontend # Depends on frontend tests passing
    # Only run for deploy triggers
    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch' || github.event_name == 'schedule'
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '18'

      - name: Install frontend dependencies
        working-directory: ./interfaces/nativeapp
        run: npm ci
      - name: Install EAS CLI
        run: npm install -g eas-cli
      - name: Trigger EAS Build for Android
        working-directory: ./interfaces/nativeapp
        env:
          EXPO_TOKEN: ${{ secrets.EXPO_TOKEN }} # EAS token for authentication
        run: |
          eas build --platform android --profile production --non-interactive --no-wait
  
  # ========================================================================
  # Deploy Backend and Frontend Web to Host
  # ========================================================================
  deploy:
    name: Deploy to Host
    runs-on: ubuntu-latest
    needs:
      - build-backend       # Wait for backend image build
      - build-frontend-web  # Wait for frontend image build
    if: gitea.event_name == 'push' || gitea.event_name == 'workflow_dispatch' || gitea.event_name == 'schedule'
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Deploy Locally
        env:
          DB_HOST: ${{ vars.DB_HOST }}
          DB_USER: ${{ vars.DB_USER }}
          DB_NAME: ${{ vars.DB_NAME }}
          DB_PASSWORD: ${{ secrets.DB_PASSWORD }}
          REDIS_URL: ${{ vars.REDIS_URL }}
          PEPPER: ${{ secrets.PEPPER }}
          JWT_SECRET_KEY: ${{ secrets.JWT_SECRET_KEY }}
          GOOGLE_API_KEY: ${{ secrets.GOOGLE_API_KEY }}
        run: |
          #!/bin/bash -ex

          # Define paths and names
          WORKSPACE_DIR="${{ gitea.workspace }}/backend" # Dir where deploy compose file lives
          COMPOSE_FILE="${WORKSPACE_DIR}/docker-compose.deploy.yml"
          PROJECT_NAME="maia" # Project name used by docker compose
          BACKEND_IMAGE_TAG="${GITEA_SHA}"
          FRONTEND_IMAGE_TAG="${GITEA_SHA}" # same tag for simplicity

          echo "--- Start Deployment ---"
          echo "Using compose file: ${COMPOSE_FILE}"

          # --- Verify compose file exists ---
          if [ ! -f "${COMPOSE_FILE}" ]; then
            echo "ERROR: Compose file not found at ${COMPOSE_FILE}"
            exit 1
          fi

          # --- Pull specific backend image version ---
          echo "Pulling backend image ${BACKEND_IMAGE_TAG}..."
          docker pull ghcr.io/${DOCKER_REGISTRY_USERNAME}/maia:${BACKEND_IMAGE_TAG}
          echo "Backend pull complete."

          # --- Pull specific frontend image version ---
          echo "Pulling frontend image ${FRONTEND_IMAGE_TAG}..."
          docker pull ghcr.io/${DOCKER_REGISTRY_USERNAME}/maia-frontend:${FRONTEND_IMAGE_TAG}
          echo "Frontend pull complete."

          # --- Pull other images defined in compose ---
          echo "Pulling other compose services for project ${PROJECT_NAME}..."
          cd "${WORKSPACE_DIR}" || exit 1
          docker compose -p "${PROJECT_NAME}" -f "${COMPOSE_FILE##*/}" pull redis db
          echo "Other service pull complete."

          # --- Update Backend image tag in compose file ---
          echo "Updating Backend image tag in ${COMPOSE_FILE##*/}..."
          sed -i "s|image: ghcr.io/${DOCKER_REGISTRY_USERNAME}/maia:.*|image: ghcr.io/${DOCKER_REGISTRY_USERNAME}/maia:${BACKEND_IMAGE_TAG}|g" "${COMPOSE_FILE##*/}"
          grep "image: ghcr.io/${DOCKER_REGISTRY_USERNAME}/maia:" "${COMPOSE_FILE##*/}" || echo "Backend image line not found!"

          # --- Update Frontend image tag in compose file ---
          echo "Updating Frontend image tag in ${COMPOSE_FILE##*/}..."
          sed -i "s|image: ghcr.io/${DOCKER_REGISTRY_USERNAME}/maia-frontend:.*|image: ghcr.io/${DOCKER_REGISTRY_USERNAME}/maia-frontend:${FRONTEND_IMAGE_TAG}|g" "${COMPOSE_FILE##*/}"
          grep "image: ghcr.io/${DOCKER_REGISTRY_USERNAME}/maia-frontend:" "${COMPOSE_FILE##*/}" || echo "Frontend image line not found!"

          # --- Restart services using updated compose file ---
          echo "Bringing compose stack down and up for project ${PROJECT_NAME}..."
          docker compose -p "${PROJECT_NAME}" -f "${COMPOSE_FILE##*/}" up -d --force-recreate --remove-orphans
          echo "Docker compose up command finished."
          echo "--- Deployment complete! ---"