---
name: CI

on:
  merge_group:
  push:
    branches: [main]
    tags: ["*"]
  pull_request:
  workflow_dispatch:

env:
  FORCE_COLOR: "1"
  PIP_DISABLE_PIP_VERSION_CHECK: "1"
  PIP_NO_PYTHON_VERSION_WARNING: "1"

permissions: {}

jobs:
  build-package:
    name: Build & verify package
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - uses: hynek/build-and-inspect-python-package@v2
        id: baipp

    outputs:
      # Used to define the matrix for tests below. The value is based on
      # packaging metadata (trove classifiers).
      supported-python-versions: ${{ steps.baipp.outputs.supported_python_classifiers_json_array }}

  tests:
    name: Tests & Mypy on ${{ matrix.python-version }}
    runs-on: ubuntu-latest
    needs: build-package

    strategy:
      fail-fast: false
      matrix:
        # Created by the build-and-inspect-python-package action above.
        python-version: ${{ fromJson(needs.build-package.outputs.supported-python-versions) }}

    steps:
      - name: Download pre-built packages
        uses: actions/download-artifact@v4
        with:
          name: Packages
          path: dist
      - run: tar xf dist/*.tar.gz --strip-components=1
      - uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}
          allow-prereleases: true
      - uses: hynek/setup-cached-uv@v2

      - name: Prepare tox
        run: |
          V=${{ matrix.python-version }}
          DO_MYPY=1

          if [[ "$V" == "3.7" || "$V" == "3.8" ]]; then
            DO_MYPY=0
          fi

          echo DO_MYPY=$DO_MYPY >>$GITHUB_ENV
          echo TOX_PYTHON=py$(echo $V | tr -d .) >>$GITHUB_ENV

          uv pip install --system tox

      - run: uv pip install --system tox-uv
        if: matrix.python-version != '3.7'

      - run: python -Im tox run -e ${{ env.TOX_PYTHON }}-mypy
        if: env.DO_MYPY == '1'

      - name: Remove src to ensure tests run against wheel
        run: rm -rf src

      - run: >
          python -Im
          tox run
          --installpkg dist/*.whl
          -e ${{ env.TOX_PYTHON }}-tests

      - name: Upload coverage data
        uses: actions/upload-artifact@v4
        with:
          name: coverage-data-${{ matrix.python-version }}
          path: .coverage.*
          if-no-files-found: ignore

  tests-pypy:
    name: Tests on ${{ matrix.python-version }}
    runs-on: ubuntu-latest
    needs: build-package

    strategy:
      fail-fast: false
      matrix:
        python-version:
          - pypy-3.9
          - pypy-3.10

    steps:
      - name: Download pre-built packages
        uses: actions/download-artifact@v4
        with:
          name: Packages
          path: dist
      - run: |
          tar xf dist/*.tar.gz --strip-components=1
          rm -rf src  # ensure tests run against wheel
      - uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}
          allow-prereleases: true
      - uses: hynek/setup-cached-uv@v2

      - run: uv pip install --system tox-uv

      - run: >
          python -Im
          tox run
          --installpkg dist/*.whl
          -e pypy3-tests

  coverage:
    name: Combine & check coverage
    runs-on: ubuntu-latest
    needs: tests

    steps:
      - name: Download pre-built packages
        uses: actions/download-artifact@v4
        with:
          name: Packages
          path: dist
      - run: tar xf dist/*.tar.gz --strip-components=1
      - uses: actions/setup-python@v5
        with:
          python-version-file: .python-version-default
      - uses: hynek/setup-cached-uv@v2

      - name: Download coverage data
        uses: actions/download-artifact@v4
        with:
          pattern: coverage-data-*
          merge-multiple: true

      - name: Combine coverage & fail if it's <100%.
        run: |
          uv pip install --system coverage[toml]

          python -Im coverage combine
          python -Im coverage html --skip-covered --skip-empty

          # Report and write to summary.
          python -Im coverage report --format=markdown >> $GITHUB_STEP_SUMMARY

          # Report again and fail if under 100%.
          python -Im coverage report --fail-under=100

      - name: Upload HTML report if check failed.
        uses: actions/upload-artifact@v4
        with:
          name: html-report
          path: htmlcov
        if: ${{ failure() }}

  docs:
    name: Build docs & run doctests
    runs-on: ubuntu-latest
    needs: build-package
    steps:
      - name: Download pre-built packages
        uses: actions/download-artifact@v4
        with:
          name: Packages
          path: dist
      - run: tar xf dist/*.tar.gz --strip-components=1
      - uses: actions/setup-python@v5
        with:
          # Keep in sync with tox/docs and .readthedocs.yaml.
          python-version: "3.12"
      - uses: hynek/setup-cached-uv@v2

      - run: uv pip install --system tox-uv
      - run: python -Im tox run -e docs,changelog

  pyright:
    name: Check types using pyright
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version-file: .python-version-default
      - uses: hynek/setup-cached-uv@v2

      - run: uv pip install --system tox-uv
      - run: python -Im tox run -e pyright

  install-dev:
    name: Verify dev env
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version-file: .python-version-default
      - uses: hynek/setup-cached-uv@v2

      - run: uv venv --python $(cat .python-version-default)
      - run: uv pip install -e .[dev]

      - name: Ensure we can import attr and attrs packages
        run: |
          source .venv/bin/activate

          python -Ic 'import attr; print(attr.__version__)'
          python -Ic 'import attrs; print(attrs.__version__)'

  # Ensure everything required is passing for branch protection.
  required-checks-pass:
    if: always()

    needs:
      - coverage
      - tests-pypy
      - docs
      - install-dev
      - pyright

    runs-on: ubuntu-latest

    steps:
      - name: Decide whether the needed jobs succeeded or failed
        uses: re-actors/alls-green@release/v1
        with:
          jobs: ${{ toJSON(needs) }}