# .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: # Only run if backend code or Docker config changes
      - 'backend/**'
      - '.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  # Ensures the project will never be out of date by running a cron for this job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 unit tests.
  # ========================================================================
  test:
    name: Run Linters and Tests
    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 and deploy the Docker image to mara.
  # ========================================================================
  build-and-deploy:
    name: Build and Deploy
    runs-on: ubuntu-latest
    needs: test # 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

      # ------------------------------------------------------------------
      # Deploy to mara
      # ------------------------------------------------------------------
      - name: Deploy Locally
        run: |
          #!/bin/bash -ex

          # Define path to compose file WITHIN the checked-out workspace
          COMPOSE_FILE="${{ gitea.workspace }}/backend/docker-compose.deploy.yml"
          PROJECT_NAME="maia"

          echo "--- Start Deploy Locally (using compose file from repo) ---"
          echo "Workspace root: ${{ gitea.workspace }}"
          echo "Using compose file: ${COMPOSE_FILE}"

          # Verify compose file exists
          if [ ! -f "${COMPOSE_FILE}" ]; then
            echo "ERROR: Compose file not found at ${COMPOSE_FILE}"
            ls -la "${{ gitea.workspace }}/backend/" # List contents for debugging
            exit 1
          fi

          # Pull the specific image version built in this workflow
          echo "Pulling image ${{ gitea.sha }}..."
          docker pull ghcr.io/${{ secrets.DOCKER_REGISTRY_USERNAME }}/maia:${{ gitea.sha }}
          echo "Pull complete."

          # Pull other images defined in compose using the specific file
          # Ensures base images like redis/db are up-to-date if specified in compose
          echo "Pulling other compose services..."
          docker compose -p "${PROJECT_NAME}" -f "${COMPOSE_FILE}" pull redis db
          echo "Other service pull complete."

          # Update the image tag IN THE CHECKED-OUT COMPOSE FILE
          # This change only exists within the job's workspace, it doesn't modify the repo source
          echo "Running sed on ${COMPOSE_FILE}..."
          sed -i 's|image: ghcr.io/${{ secrets.DOCKER_REGISTRY_USERNAME }}/maia:.*|image: ghcr.io/${{ secrets.DOCKER_REGISTRY_USERNAME }}/maia:${{ gitea.sha }}|g' "${COMPOSE_FILE}"
          echo "sed complete. Showing updated line:"
          grep "image: ghcr.io/${{ secrets.DOCKER_REGISTRY_USERNAME }}/maia" "${COMPOSE_FILE}" || echo "Image line not found after sed!"

          # Restart the services using the updated compose file from the workspace
          # Docker compose interacts with the HOST daemon via the mounted socket
          echo "Bringing compose stack down and up with new image..."
          docker compose -p "${PROJECT_NAME}" -f "${COMPOSE_FILE}" up -d --force-recreate --remove-orphans
          echo "Docker compose up command finished."
          echo "--- Local deployment complete! ---"