name: CI

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

permissions:
  contents: read

concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

jobs:
  # ── Lint, Build & Test on macOS and Linux ──────────────────────
  build:
    name: ${{ matrix.name }}
    runs-on: ${{ matrix.runner }}
    container: ${{ matrix.container }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - name: "macOS"
            runner: macos-15
            container: ""
            install-swiftlint: brew install swiftlint
          - name: "Linux"
            runner: ubuntu-latest
            container: swift:6.0
            install-swiftlint: |
              apt-get update && apt-get install -y curl unzip
              SWIFTLINT_VERSION="0.58.2"
              curl -fsSL "https://github.com/realm/SwiftLint/releases/download/${SWIFTLINT_VERSION}/swiftlint_linux.zip" -o swiftlint.zip
              unzip -o swiftlint.zip -d /usr/local/bin
              chmod +x /usr/local/bin/swiftlint
              rm swiftlint.zip

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

      - name: Install SwiftLint
        run: ${{ matrix.install-swiftlint }}

      - name: Lint
        run: swiftlint

      - name: Build
        env:
          DISABLE_SWIFTLINT: "1"
        run: swift build

      - name: Test
        env:
          DISABLE_SWIFTLINT: "1"
        run: swift test

  # ── Update test count badge in README (main only) ─────────────
  update-badge:
    name: Update test badge
    needs: build
    runs-on: macos-15
    if: (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && github.ref == 'refs/heads/main'
    permissions:
      contents: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          ref: main

      - name: Count tests and suites
        id: counts
        run: |
          TESTS=$(grep -r '@Test\b' Tests/ --include='*.swift' | wc -l | tr -d ' ')
          SUITES=$(grep -r '@Suite\b' Tests/ --include='*.swift' | wc -l | tr -d ' ')
          echo "tests=$TESTS" >> "$GITHUB_OUTPUT"
          echo "suites=$SUITES" >> "$GITHUB_OUTPUT"
          echo "Found $TESTS tests in $SUITES suites"

      - name: Update README badge and counts
        env:
          TESTS: ${{ steps.counts.outputs.tests }}
          SUITES: ${{ steps.counts.outputs.suites }}
        run: |
          # Badge: Tests-NNN_passing
          sed -i '' "s/Tests-[0-9]*_passing/Tests-${TESTS}_passing/" README.md
          # Project structure: NNN tests across NN test suites
          sed -i '' "s/[0-9]* tests across [0-9]* test suites/${TESTS} tests across ${SUITES} test suites/" README.md
          # Developer notes: All NNN tests run in parallel
          sed -i '' "s/All [0-9]* tests run/All ${TESTS} tests run/" README.md

      - name: Commit if changed
        run: |
          git diff --quiet README.md && echo "No changes" && exit 0
          git config user.name "Frank Gregor"
          git config user.email "phranck@mac.com"
          git add README.md
          # [skip ci] prevents the push from triggering another workflow run
          git commit -m "Chore: Update test count badge to ${{ steps.counts.outputs.tests }} tests [skip ci]"
          git push

  # ── DocC Documentation (→ docs.tuikit.dev) ───────────────────
  deploy-docs:
    name: Build & Deploy DocC
    needs: build
    runs-on: macos-15
    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Build DocC documentation
        env:
          DISABLE_SWIFTLINT: "1"
        run: |
          swift package --allow-writing-to-directory docc-output \
            generate-documentation \
            --target TUIkit \
            --output-path docc-output \
            --transform-for-static-hosting

      - name: Add routing support for GitHub Pages
        run: |
          cp Sources/TUIkit/TUIkit.docc/theme-overrides.css docc-output/theme-overrides.css

          python3 - <<'PY'
          from pathlib import Path

          link = '<link rel="stylesheet" href="/theme-overrides.css">'
          for path in Path("docc-output").rglob("*.html"):
              content = path.read_text(encoding="utf-8")
              if link in content or "</head>" not in content:
                  continue
              path.write_text(content.replace("</head>", f"  {link}\n</head>"), encoding="utf-8")
          PY

          # 404.html = copy of SPA index so all deep-link paths route through DocC
          cp docc-output/index.html docc-output/404.html
          # Root redirect: docs.tuikit.dev/ -> docs.tuikit.dev/documentation/tuikit/
          cat > docc-output/index.html << 'REDIRECT'
          <!DOCTYPE html>
          <html lang="en">
          <head>
            <meta charset="utf-8">
            <meta http-equiv="refresh" content="0; url=/documentation/tuikit/">
            <link rel="canonical" href="/documentation/tuikit/">
            <title>Redirecting to TUIkit Documentation</title>
          </head>
          <body>
            <p>Redirecting to <a href="/documentation/tuikit/">TUIkit Documentation</a>...</p>
          </body>
          </html>
          REDIRECT

      - name: Deploy to tuikit-docs
        uses: peaceiris/actions-gh-pages@v4
        with:
          deploy_key: ${{ secrets.DOCS_DEPLOY_KEY }}
          external_repository: phranck/tuikit-docs
          publish_branch: gh-pages
          publish_dir: docc-output
          cname: docs.tuikit.dev