name: Build Python App

on:
  workflow_call:
    inputs:
      app:
        required: true
        type: string
      dockerTag:
        required: true
        type: string
      enabled:
        required: true
        type: boolean
      shouldBuild:
        required: true
        type: boolean

jobs:
  build-python:
    if: ${{ inputs.enabled && inputs.shouldBuild }}
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      # -----------------------------
      # Cache pip per app
      # -----------------------------
      - name: Cache pip
        uses: actions/cache@v4
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip-${{ inputs.app }}-${{ hashFiles('apps/${{ inputs.app }}/requirements*.txt') }}
          restore-keys: |
            ${{ runner.os }}-pip-${{ inputs.app }}-

      # -----------------------------
      # Install Python deps
      # -----------------------------
      - name: Install dependencies
        working-directory: apps/${{ inputs.app }}
        run: |
          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
          if [ -f requirements-test.txt ]; then pip install -r requirements-test.txt; fi

      # -----------------------------
      # Run tests
      # -----------------------------
      - name: Run Python tests
        working-directory: apps/${{ inputs.app }}
        run: python -m pytest -q

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

      # -----------------------------
      # Cache Docker layers per app
      # -----------------------------
      - name: Cache Docker layers
        uses: actions/cache@v4
        with:
          path: /tmp/.buildx-cache-${{ inputs.app }}
          key: ${{ runner.os }}-buildx-${{ inputs.app }}-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-${{ inputs.app }}-

      # -----------------------------
      # Build image (load locally for smoke test)
      # -----------------------------
      - name: Build Docker image (local load)
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./dockerfiles/Python
          build-args: |
            MODULE_NAME=${{ inputs.app }}
          load: true
          tags: local-${{ inputs.app }}:${{ inputs.dockerTag }}
          cache-from: type=local,src=/tmp/.buildx-cache-${{ inputs.app }}
          cache-to: type=local,dest=/tmp/.buildx-cache-${{ inputs.app }}-new

      # -----------------------------
      # Smoke test
      # -----------------------------
      - name: Smoke test container
        run: |
          docker run --rm local-${{ inputs.app }}:${{ inputs.dockerTag }} \
            /bin/sh -c "echo 'Smoke test OK'"

      # -----------------------------
      # Docker login
      # -----------------------------
      - name: Docker login
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_HUB_NAME }}
          password: ${{ secrets.DOCKER_HUB_TOKEN }}

      # -----------------------------
      # Push final image (no rebuild)
      # -----------------------------
      - name: Push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./dockerfiles/Python
          build-args: |
            MODULE_NAME=${{ inputs.app }}
          push: true
          tags: |
            bskjon/mediaprocessing-${{ inputs.app }}:v5
            bskjon/mediaprocessing-${{ inputs.app }}:v5-${{ inputs.dockerTag }}
            bskjon/mediaprocessing-${{ inputs.app }}:v5-${{ github.sha }}
          cache-from: type=local,src=/tmp/.buildx-cache-${{ inputs.app }}
          cache-to: type=local,dest=/tmp/.buildx-cache-${{ inputs.app }}-new

      # -----------------------------
      # Move Docker cache
      # -----------------------------
      - name: Move Docker cache
        run: |
          rm -rf /tmp/.buildx-cache-${{ inputs.app }}
          mv /tmp/.buildx-cache-${{ inputs.app }}-new /tmp/.buildx-cache-${{ inputs.app }}