name: Release Accessibility Widget

on:
  push:
    branches:
      - main

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0  # Full history for changelog generation

      - name: Get current version from package.json
        id: get_version
        run: |
          version=$(grep -oP '"version":\s*"\K[0-9.]+' package.json)
          echo "Current version: $version"
          echo "current_version=$version" >> $GITHUB_OUTPUT
          echo "CURRENT_VERSION=$version" >> $GITHUB_ENV

      - name: Determine if release is needed
        id: should_release
        run: |
          commit_msg="${{ github.event.head_commit.message }}"
          echo "Commit message: $commit_msg"
          
          if [[ "$commit_msg" =~ release ]]; then
            echo "should_release=true" >> $GITHUB_OUTPUT
            echo "SHOULD_RELEASE=true" >> $GITHUB_ENV
          else
            echo "should_release=false" >> $GITHUB_OUTPUT
            echo "SHOULD_RELEASE=false" >> $GITHUB_ENV
            echo "ℹ️ Commit does not contain 'release' keyword - skipping release"
          fi

      - name: Calculate new version
        id: new_version
        if: steps.should_release.outputs.should_release == 'true'
        run: |
          current="${{ steps.get_version.outputs.current_version }}"
          
          IFS='.' read -ra parts <<< "$current"
          major="${parts[0]:-2}"
          minor="${parts[1]:-0}"
          patch="${parts[2]:-0}"
          
          # Increment patch version (2.0.0 -> 2.0.1 -> 2.0.2, etc.)
          patch=$((patch + 1))
          
          new_version="$major.$minor.$patch"
          echo "New version will be: $new_version"
          echo "new_version=$new_version" >> $GITHUB_OUTPUT
          echo "NEW_VERSION=$new_version" >> $GITHUB_ENV

      - name: Check if version already exists
        id: check_tag
        if: steps.should_release.outputs.should_release == 'true'
        run: |
          new_version="${{ steps.new_version.outputs.new_version }}"
          if git rev-parse "v$new_version" >/dev/null 2>&1; then
            echo "Tag v$new_version already exists!"
            echo "tag_exists=true" >> $GITHUB_OUTPUT
          else
            echo "Tag v$new_version does not exist, proceeding..."
            echo "tag_exists=false" >> $GITHUB_OUTPUT
          fi

      - name: Update version in package.json
        if: steps.should_release.outputs.should_release == 'true' && steps.check_tag.outputs.tag_exists == 'false'
        run: |
          current="${{ steps.get_version.outputs.current_version }}"
          new="${{ steps.new_version.outputs.new_version }}"
          
          # Update package.json version
          sed -i "s/\"version\": \"$current\"/\"version\": \"$new\"/" package.json
          
          echo "Updated version from $current to $new in package.json"

      - name: Generate changelog
        id: changelog
        if: steps.should_release.outputs.should_release == 'true' && steps.check_tag.outputs.tag_exists == 'false'
        run: |
          # Get the latest tag or use initial commit if no tags exist
          latest_tag=$(git describe --tags --abbrev=0 2>/dev/null || git rev-list --max-parents=0 HEAD)
          
          echo "## What's Changed" > CHANGELOG.md
          echo "" >> CHANGELOG.md
          
          # Get commits since last tag
          git log $latest_tag..HEAD --pretty=format:"- %s (%h)" --no-merges >> CHANGELOG.md
          
          echo "" >> CHANGELOG.md
          echo "" >> CHANGELOG.md
          echo "**Full Changelog**: https://github.com/${{ github.repository }}/compare/$latest_tag...v${{ steps.new_version.outputs.new_version }}" >> CHANGELOG.md
          
          # Output for release body
          cat CHANGELOG.md
          
          # Save changelog for release
          {
            echo 'changelog<<EOF'
            cat CHANGELOG.md
            echo EOF
          } >> $GITHUB_OUTPUT

      - name: Commit version bump
        if: steps.should_release.outputs.should_release == 'true' && steps.check_tag.outputs.tag_exists == 'false'
        run: |
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git config --local user.name "github-actions[bot]"
          git add package.json
          git commit -m "chore: bump version to ${{ steps.new_version.outputs.new_version }}"
          git push

      - name: Create release package
        if: steps.should_release.outputs.should_release == 'true' && steps.check_tag.outputs.tag_exists == 'false'
        run: |
          mkdir -p accessibility-widgets
          cp widget.js accessibility-widgets/
          cp README.md accessibility-widgets/
          cp LICENSE accessibility-widgets/
          cp package.json accessibility-widgets/
          
          zip -r accessibility-widgets-v${{ steps.new_version.outputs.new_version }}.zip accessibility-widgets
          rm -rf accessibility-widgets
          
          # Verify zip was created
          ls -lh accessibility-widgets-v${{ steps.new_version.outputs.new_version }}.zip

      - name: Create GitHub Release
        if: steps.should_release.outputs.should_release == 'true' && steps.check_tag.outputs.tag_exists == 'false'
        uses: softprops/action-gh-release@v1
        with:
          files: accessibility-widgets-v${{ steps.new_version.outputs.new_version }}.zip
          tag_name: "v${{ steps.new_version.outputs.new_version }}"
          name: "Accessibility Widgets v${{ steps.new_version.outputs.new_version }}"
          body: |
            # Changelog
            
            ${{ steps.changelog.outputs.changelog }}
            
          draft: false
          prerelease: false
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Summary
        if: steps.should_release.outputs.should_release == 'true'
        run: |
          if [ "${{ steps.check_tag.outputs.tag_exists }}" = "true" ]; then
            echo "⚠️ Release skipped - version v${{ steps.new_version.outputs.new_version }} already exists"
          else
            echo "✅ Successfully created release v${{ steps.new_version.outputs.new_version }}"
            echo "📦 Widget package attached to release"
            echo "🔄 Available via CDN and npm"
          fi

      - name: Skip Release Info
        if: steps.should_release.outputs.should_release == 'false'
        run: |
          echo "ℹ️ No release triggered. To create a release, include 'release' in your commit message."
          echo "Example: git commit -m 'feat: new feature release'"