name: CI

on:
  pull_request:
    branches: [main]
  workflow_dispatch:
    inputs:
      test_changed_only:
        description: 'Only test changed files (true) or all files (false)'
        required: false
        default: 'true'
        type: choice
        options:
          - 'true'
          - 'false'
      enable_changed_files_detection:
        description: 'Enable changed files detection feature'
        required: false
        default: 'true'
        type: choice
        options:
          - 'true'
          - 'false'
  workflow_call:
    inputs:
      test_changed_only:
        description: 'Only test changed files (true) or all files (false)'
        required: false
        type: string
        default: 'true'
      enable_changed_files_detection:
        description: 'Enable changed files detection feature'
        required: false
        type: string
        default: 'true'

permissions:
  contents: read

jobs:
  test:
    runs-on: ubuntu-latest
    timeout-minutes: 30
    strategy:
      fail-fast: false
      matrix:
        python-version: ["3.12", "3.13"]
    steps:
      - uses: actions/checkout@v4

      - name: Free disk space
        run: |
          # Remove large, preinstalled toolchains we don't need on the runner
          sudo rm -rf /usr/share/dotnet
          sudo rm -rf /opt/ghc
          sudo rm -rf /usr/local/lib/android
          sudo rm -rf /opt/hostedtoolcache/CodeQL
          # Prune docker to reclaim space (safe on GH runners)
          docker system prune -af || true
          df -h

      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}

      - name: Prepare environment with uv
        run: |
          python -m pip install --upgrade pip uv
          uv venv --python "${{ matrix.python-version }}" --seed
          echo "VIRTUAL_ENV=${PWD}/.venv" >> "$GITHUB_ENV"
          echo "PATH=${PWD}/.venv/bin:${PATH}" >> "$GITHUB_ENV"
          # Activate env to ensure subsequent commands succeed in this step
          source .venv/bin/activate
          uv pip install -e ".[dev]"

      - name: Determine test scope
        id: test-scope
        env:
          ENABLE_CHANGED_FILES_DETECTION: ${{ inputs.enable_changed_files_detection || 'true' }}
          TEST_CHANGED_ONLY: ${{ inputs.test_changed_only || 'true' }}
        run: |
          # Determine if we should test only changed files
          # If detection is disabled, always test all files
          if [ "$ENABLE_CHANGED_FILES_DETECTION" != "true" ]; then
            TEST_CHANGED_ONLY="false"
          fi

          echo "test_changed_only=$TEST_CHANGED_ONLY" >> "$GITHUB_OUTPUT"
          echo "enable_detection=$ENABLE_CHANGED_FILES_DETECTION" >> "$GITHUB_OUTPUT"
          echo "Test scope: $TEST_CHANGED_ONLY"
          echo "Changed files detection: $ENABLE_CHANGED_FILES_DETECTION"

      - name: Get changed test files
        id: changed-tests
        if: steps.test-scope.outputs.test_changed_only == 'true' && steps.test-scope.outputs.enable_detection == 'true'
        env:
          GITHUB_BASE_REF: ${{ github.event.pull_request.base.sha || '' }}
          GITHUB_SHA: ${{ github.sha }}
        run: |
          chmod +x .github/scripts/detect_changed_tests.sh
          .github/scripts/detect_changed_tests.sh \
            "${{ github.event.pull_request.base.sha || github.event.before || '' }}" \
            "${{ github.sha }}" \
            "${{ github.event_name }}"

      - name: Run tests (changed files only)
        if: steps.test-scope.outputs.test_changed_only == 'true' && steps.changed-tests.outputs.has_tests == 'true'
        run: |
          pytest "${{ steps.changed-tests.outputs.test_files }}" -v -m "not slow"

      - name: Run tests (all files)
        if: steps.test-scope.outputs.test_changed_only == 'false' || steps.changed-tests.outputs.has_tests == 'false'
        run: |
          if [ ! -d tests ]; then
            echo "tests/ directory not found. Skipping pytest run."
            exit 0
          fi
          TEST_FILES=$(find tests -type f \( -name "test_*.py" -o -name "*_test.py" \))
          if [ -z "$TEST_FILES" ]; then
            echo "No pytest-compatible test files detected under tests/. Skipping pytest run."
            exit 0
          fi
          pytest tests/ -v -m "not slow"