name: Coverage Tests

on:
  pull_request:
    types: [labeled, synchronize, opened, reopened]
    paths-ignore:
      - 'docs/**'

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  coverage:
    if: contains(github.event.pull_request.labels.*.name, 'coverage')
    runs-on: ubuntu-latest
    name: Coverage Tests (PostgreSQL)
    timeout-minutes: 60
    services:
      postgres:
        image: postgres:18-alpine
        env:
          POSTGRES_DB: django
          POSTGRES_USER: user
          POSTGRES_PASSWORD: postgres
        ports:
          - 5432:5432
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0
          persist-credentials: false

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: '3.14'
          cache: 'pip'
          cache-dependency-path: 'tests/requirements/py3.txt'

      - name: Update apt repo
        run: sudo apt update
      - name: Install libmemcached-dev for pylibmc
        run: sudo apt install -y libmemcached-dev
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip wheel
          python -m pip install -r tests/requirements/py3.txt -r tests/requirements/postgres.txt -e .
          python -m pip install 'coverage[toml]' diff-cover

      - name: Create PostgreSQL settings file
        run: mv ./.github/workflows/data/test_postgres.py.tpl ./tests/test_postgres.py

      - name: Run tests with coverage
        env:
          PYTHONPATH: ${{ github.workspace }}/tests
          COVERAGE_PROCESS_START: ${{ github.workspace }}/tests/.coveragerc
          RUNTESTS_DIR: ${{ github.workspace }}/tests
        run: |
          python -Wall tests/runtests.py --settings=test_postgres -v2

      - name: Generate coverage report
        if: success()
        env:
          COVERAGE_RCFILE: ${{ github.workspace }}/tests/.coveragerc
          RUNTESTS_DIR: ${{ github.workspace }}/tests
        run: |
          python -m coverage combine
          python -m coverage report --show-missing
          python -m coverage xml -o tests/coverage.xml

      - name: Generate diff coverage report
        if: success()
        run: |
          if [ -f tests/coverage.xml ]; then
            diff-cover tests/coverage.xml --compare-branch=origin/main --fail-under=0 > diff-cover-report.md
          else
            echo "No coverage data available." > diff-cover-report.md
          fi

      - name: Save PR number
        if: success()
        run: echo "${{ github.event.pull_request.number }}" > pr_number.txt

      - name: Upload artifacts
        if: success()
        uses: actions/upload-artifact@v4
        with:
          name: coverage-artifacts
          path: |
            diff-cover-report.md
            pr_number.txt
          retention-days: 1