name: CI

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

permissions:
  contents: read

env:
  PYTHONIOENCODING: utf-8
  PYTHONUTF8: "1"

jobs:
  validate:
    name: Lint & Verify (${{ matrix.os }}, Python ${{ matrix.python-version }})
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
        python-version: ["3.11", "3.12"]
    runs-on: ${{ matrix.os }}
    timeout-minutes: 20

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        env:
          GIT_CONFIG_COUNT: "1"
          GIT_CONFIG_KEY_0: "core.autocrlf"
          GIT_CONFIG_VALUE_0: "false"
        with:
          persist-credentials: false

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

      - name: Verify accessible SVG contract
        id: a11y
        run: python scripts/test-lint-a11y.py

      - name: Run skin linter
        id: skin
        run: python scripts/lint-skin.py --all --baseline

      - name: Verify sequence OAuth specs
        id: oauth
        run: python scripts/verify-sequence-oauth.py

      - name: Verify draw.io import script
        id: drawio
        run: python scripts/verify-drawio-import.py

      - name: Verify Mermaid import script
        id: mermaid
        run: python scripts/verify-mermaid-import.py

      - name: Verify onboarding CLI script (if present)
        id: onboard
        shell: bash
        run: |
          if [ -f scripts/verify-onboarding.py ]; then
            python scripts/verify-onboarding.py
          fi

      - name: Install Playwright & Chromium (if linter present)
        id: playwright_install
        shell: bash
        run: |
          if [ -f scripts/lint-render.py ]; then
            python -m pip install playwright
            if [ "${{ runner.os }}" = "Linux" ]; then
              python -m playwright install --with-deps chromium
            else
              python -m playwright install chromium
            fi
          fi

      - name: Verify render layout validator self-test (if present)
        id: lint_render
        shell: bash
        run: |
          if [ -f scripts/lint-render.py ]; then
            python scripts/lint-render.py --self-test --screenshot-dir failure-screenshots
          fi

      - name: Verify generated icon assets
        id: icons
        shell: bash
        run: |
          python scripts/build-icons.py
          git diff --ignore-space-at-eol --exit-code -- \
            skills/diagram-design/assets/icons.html \
            skills/diagram-design/references/primitive-icons.md

      - name: Upload linter failure artifacts
        if: failure()
        uses: actions/upload-artifact@v4
        with:
          name: linter-failure-artifacts-${{ matrix.os }}-python-${{ matrix.python-version }}
          path: |
            failure-screenshots/
            scripts/fixtures/
            skills/diagram-design/assets/

      - name: Generate CI execution summary table
        if: always()
        shell: bash
        run: |
          echo "### 📊 CI Verification Summary (${{ matrix.os }}, Python ${{ matrix.python-version }})" >> $GITHUB_STEP_SUMMARY
          echo "| Verification Gate | Outcome |" >> $GITHUB_STEP_SUMMARY
          echo "|---|---|" >> $GITHUB_STEP_SUMMARY
          echo "| SVG Accessibility Contract | ${{ steps.a11y.outcome == 'success' && '✅ Passed' || (steps.a11y.outcome == 'skipped' && '⏭️ Skipped' || '❌ Failed') }} |" >> $GITHUB_STEP_SUMMARY
          echo "| Color Palette & Skin Linter | ${{ steps.skin.outcome == 'success' && '✅ Passed' || (steps.skin.outcome == 'skipped' && '⏭️ Skipped' || '❌ Failed') }} |" >> $GITHUB_STEP_SUMMARY
          echo "| Sequence Diagram Grammar | ${{ steps.oauth.outcome == 'success' && '✅ Passed' || (steps.oauth.outcome == 'skipped' && '⏭️ Skipped' || '❌ Failed') }} |" >> $GITHUB_STEP_SUMMARY
          echo "| Draw.io Import Extractor | ${{ steps.drawio.outcome == 'success' && '✅ Passed' || (steps.drawio.outcome == 'skipped' && '⏭️ Skipped' || '❌ Failed') }} |" >> $GITHUB_STEP_SUMMARY
          echo "| Mermaid Import Extractor | ${{ steps.mermaid.outcome == 'success' && '✅ Passed' || (steps.mermaid.outcome == 'skipped' && '⏭️ Skipped' || '❌ Failed') }} |" >> $GITHUB_STEP_SUMMARY
          echo "| Primitive Icons & Documentation | ${{ steps.icons.outcome == 'success' && '✅ Passed' || (steps.icons.outcome == 'skipped' && '⏭️ Skipped' || '❌ Failed') }} |" >> $GITHUB_STEP_SUMMARY