name: Unified Release

on:
  workflow_dispatch:
    inputs:
      version:
        description: 'Explicit version (e.g., 1.2.3). Leave blank to auto-increment.'
        required: false
        type: string
      release_type:
        description: 'Release type (used when version is blank)'
        required: true
        default: 'patch'
        type: choice
        options:
          - patch
          - minor
          - major

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      packages: write

    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Set up Helm
        uses: azure/setup-helm@v4

      - name: Configure Git
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Determine Version
        id: version
        run: |
          INPUT_VERSION="${{ github.event.inputs.version }}"
          if [ -n "$INPUT_VERSION" ]; then
            VERSION="$INPUT_VERSION"
          else
            # Auto-increment based on release_type
            CURRENT=$(grep '^version:' chart/Chart.yaml | awk '{print $2}')
            # Strip any pre-release suffix (e.g., 2.0.0-dev -> 2.0.0)
            CURRENT=$(echo "$CURRENT" | sed 's/-.*//')
            MAJOR=$(echo "$CURRENT" | cut -d. -f1)
            MINOR=$(echo "$CURRENT" | cut -d. -f2)
            PATCH=$(echo "$CURRENT" | cut -d. -f3)

            case "${{ github.event.inputs.release_type }}" in
              major) VERSION="$((MAJOR + 1)).0.0" ;;
              minor) VERSION="${MAJOR}.$((MINOR + 1)).0" ;;
              patch) VERSION="${MAJOR}.${MINOR}.$((PATCH + 1))" ;;
            esac
          fi

          echo "version=${VERSION}" >> $GITHUB_OUTPUT
          echo "tag=v${VERSION}" >> $GITHUB_OUTPUT
          echo "Releasing version ${VERSION}"

      - name: Update Chart Version
        run: |
          sed -i "s/^version: .*/version: ${{ steps.version.outputs.version }}/" chart/Chart.yaml
          git add chart/Chart.yaml
          git diff --quiet --staged || git commit -m "chore(release): ${{ steps.version.outputs.version }} [skip ci]"

      - name: Create and Push Tag
        run: |
          git tag -a "${{ steps.version.outputs.tag }}" -m "Release ${{ steps.version.outputs.tag }}"
          git push origin main
          git push origin "${{ steps.version.outputs.tag }}"

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and Push Docker Image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          build-args: CACHE_BUST=${{ github.sha }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          tags: |
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.tag }}
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.version }}
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
          platforms: linux/amd64

      - name: Publish Helm Chart to GitHub Pages
        run: |
          helm package chart/
          CHART_TGZ="devcontainer-${{ steps.version.outputs.version }}.tgz"

          # Set up gh-pages in a temporary directory
          PAGES_DIR=$(mktemp -d)
          if git ls-remote --heads origin gh-pages | grep -q gh-pages; then
            # gh-pages exists — shallow clone just that branch
            git clone --single-branch --branch gh-pages \
              "https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git" \
              "$PAGES_DIR"
          else
            # First time — initialize gh-pages
            git init "$PAGES_DIR"
            git -C "$PAGES_DIR" checkout --orphan gh-pages
            git -C "$PAGES_DIR" remote add origin \
              "https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git"
            cat > "$PAGES_DIR/index.html" <<'HTMLEOF'
          <!DOCTYPE html>
          <html>
          <head><title>Dev Container Helm Chart Repository</title></head>
          <body>
          <h1>Dev Container Helm Chart Repository</h1>
          <p>Add this repository to Helm:</p>
          <pre>helm repo add devcontainer https://farhoodliquor.github.io/devcontainer</pre>
          <p>Install the chart:</p>
          <pre>helm install mydev devcontainer/devcontainer --set name=mydev</pre>
          </body>
          </html>
          HTMLEOF
          fi

          git -C "$PAGES_DIR" config user.name "github-actions[bot]"
          git -C "$PAGES_DIR" config user.email "github-actions[bot]@users.noreply.github.com"

          # Copy chart package and rebuild index
          cp "$CHART_TGZ" "$PAGES_DIR/"
          if [ -f "$PAGES_DIR/index.yaml" ]; then
            helm repo index "$PAGES_DIR" --url https://farhoodliquor.github.io/devcontainer --merge "$PAGES_DIR/index.yaml"
          else
            helm repo index "$PAGES_DIR" --url https://farhoodliquor.github.io/devcontainer
          fi

          # Commit and push
          git -C "$PAGES_DIR" add .
          git -C "$PAGES_DIR" commit -m "Publish chart ${{ steps.version.outputs.version }}"
          git -C "$PAGES_DIR" push origin gh-pages

      - name: Create GitHub Release
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          VERSION: ${{ steps.version.outputs.version }}
          TAG: ${{ steps.version.outputs.tag }}
          IMAGE: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.tag }}
        run: |
          PREV_TAG=$(git describe --tags --abbrev=0 HEAD~1 2>/dev/null || echo "")
          if [ -z "$PREV_TAG" ]; then
            COMMITS=$(git log --pretty=format:"- %s (%h)" HEAD)
          else
            COMMITS=$(git log --pretty=format:"- %s (%h)" "${PREV_TAG}..HEAD")
          fi

          cat > release-notes.md <<NOTESEOF
          ## Release ${VERSION}

          ### Changes
          ${COMMITS}

          ### Docker Image
          \`\`\`bash
          docker pull ${IMAGE}
          \`\`\`

          ### Helm Chart
          \`\`\`bash
          helm repo add devcontainer https://farhoodliquor.github.io/devcontainer
          helm repo update
          helm install mydev devcontainer/devcontainer --version ${VERSION} --set name=mydev
          \`\`\`
          NOTESEOF
          sed -i 's/^          //' release-notes.md

          gh release create "${TAG}" \
            --title "Release ${TAG}" \
            --notes-file release-notes.md