name: Coverage (Nightly)

on:
  schedule:
    # Run at 2 AM UTC every day
    - cron: '0 2 * * *'
  # Allow manual triggers for testing
  workflow_dispatch:

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

jobs:
  compile:
    name: Build with Coverage
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Python 3.10
        uses: actions/setup-python@v5
        with:
          python-version: "3.10"

      - name: Install uv
        uses: astral-sh/setup-uv@v5

      - name: Install dependencies
        run: bash -x .github/scripts/setup.sh

      - name: Build with coverage instrumentation
        run: |
          ./configure --enable-debugbuild --enable-coverage CC=clang
          uv run make -j $(nproc) testpack.tar.bz2

      - name: Upload build artifact
        uses: actions/upload-artifact@v4
        with:
          name: cln-coverage-build
          path: testpack.tar.bz2

  test:
    name: Test (${{ matrix.name }})
    runs-on: ubuntu-22.04
    needs: compile
    strategy:
      fail-fast: false
      matrix:
        include:
          - name: sqlite
            db: sqlite3
            pytest_par: 10
          - name: postgres
            db: postgres
            pytest_par: 10

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Python 3.10
        uses: actions/setup-python@v5
        with:
          python-version: "3.10"

      - name: Install uv
        uses: astral-sh/setup-uv@v5

      - name: Install dependencies
        run: bash -x .github/scripts/setup.sh

      - name: Install Bitcoin Core
        run: bash -x .github/scripts/install-bitcoind.sh

      - name: Download build artifact
        uses: actions/download-artifact@v4
        with:
          name: cln-coverage-build

      - name: Unpack build
        run: tar -xaf testpack.tar.bz2

      - name: Run tests with coverage
        env:
          CLN_COVERAGE_DIR: ${{ github.workspace }}/coverage-raw
          TEST_DB_PROVIDER: ${{ matrix.db }}
          PYTEST_PAR: ${{ matrix.pytest_par }}
          SLOW_MACHINE: 1
          TIMEOUT: 900
        run: |
          mkdir -p "$CLN_COVERAGE_DIR"
          uv run eatmydata pytest tests/ -n ${PYTEST_PAR} -vvv

      - name: Upload coverage data
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: coverage-raw-${{ matrix.name }}
          path: coverage-raw/*.profraw
          if-no-files-found: error

  report:
    name: Generate Coverage Report
    runs-on: ubuntu-22.04
    needs: test
    if: always()

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install LLVM tools
        run: |
          wget https://apt.llvm.org/llvm.sh
          chmod +x llvm.sh
          sudo ./llvm.sh 18
          sudo ln -sf /usr/bin/llvm-profdata-18 /usr/bin/llvm-profdata
          sudo ln -sf /usr/bin/llvm-cov-18 /usr/bin/llvm-cov

      - name: Download build artifact
        uses: actions/download-artifact@v4
        with:
          name: cln-coverage-build

      - name: Unpack build
        run: tar -xaf testpack.tar.bz2

      - name: Download all coverage artifacts
        uses: actions/download-artifact@v4
        with:
          pattern: coverage-raw-*
          path: coverage-artifacts

      - name: Merge coverage data
        run: |
          mkdir -p coverage-raw coverage
          find coverage-artifacts -name "*.profraw" -exec cp {} coverage-raw/ \;
          PROFRAW_COUNT=$(ls -1 coverage-raw/*.profraw 2>/dev/null | wc -l)
          echo "Found $PROFRAW_COUNT profile files"
          if [ "$PROFRAW_COUNT" -eq 0 ]; then
            echo "ERROR: No coverage data found"
            exit 1
          fi
          chmod +x contrib/coverage/collect-coverage.sh
          CLN_COVERAGE_DIR=coverage-raw ./contrib/coverage/collect-coverage.sh

      - name: Generate HTML report
        run: |
          chmod +x contrib/coverage/generate-coverage-report.sh
          ./contrib/coverage/generate-coverage-report.sh

      - name: Upload to Codecov
        uses: codecov/codecov-action@v4
        with:
          files: coverage/merged.profdata
          flags: integration-tests
          name: cln-nightly-coverage
          token: ${{ secrets.CODECOV_TOKEN }}
          fail_ci_if_error: false

      - name: Upload HTML report
        uses: actions/upload-artifact@v4
        with:
          name: coverage-html-report
          path: coverage/html
          retention-days: 90

      - name: Add summary to job
        run: |
          echo "## Coverage Summary" >> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY
          cat coverage/summary.txt >> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "📊 Download detailed HTML report from workflow artifacts" >> $GITHUB_STEP_SUMMARY