name: Generate Release Notes

on:
  release:
    types: [published]

permissions:
  contents: write
  models: read

jobs:
  generate-release-notes:
    runs-on: ubuntu-latest
    if: startsWith(github.ref, 'refs/tags/v') && !github.event.release.prerelease

    steps:
      - name: Checkout repository
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 #v4.2.2
        with:
          fetch-depth: 0 # Fetch full history to compare with previous release

      - name: Get previous release tag
        id: get-previous-tag
        run: |
          # Get the previous release tag (excluding the current one)
          CURRENT_TAG="${{ github.ref_name }}"
          PREVIOUS_TAG=$(git tag --sort=-version:refname | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$' | grep -v "$CURRENT_TAG" | head -n 1)

          if [ -z "$PREVIOUS_TAG" ]; then
            echo "No previous release found, using initial commit"
            PREVIOUS_TAG=$(git rev-list --max-parents=0 HEAD)
          fi

          echo "current-tag=$CURRENT_TAG" >> $GITHUB_OUTPUT
          echo "previous-tag=$PREVIOUS_TAG" >> $GITHUB_OUTPUT
          echo "Previous release: $PREVIOUS_TAG"
          echo "Current release: $CURRENT_TAG"

      - name: Get commit messages between releases
        id: get-commits
        run: |
          # Get commit messages between previous and current release
          PREVIOUS_TAG="${{ steps.get-previous-tag.outputs.previous-tag }}"
          CURRENT_TAG="${{ steps.get-previous-tag.outputs.current-tag }}"

          # Get commit log with detailed format
          COMMIT_LOG=$(git log --pretty=format:"- %s (%h by %an)" $PREVIOUS_TAG..$CURRENT_TAG --no-merges)

          # Get changed files summary
          CHANGED_FILES=$(git diff --name-status $PREVIOUS_TAG..$CURRENT_TAG | head -20)

          # Save to files for AI processing
          echo "$COMMIT_LOG" > commits.txt
          echo "$CHANGED_FILES" > changes.txt

          echo "commits-file=commits.txt" >> $GITHUB_OUTPUT
          echo "changes-file=changes.txt" >> $GITHUB_OUTPUT

      - name: Generate release notes with AI
        id: generate-notes
        uses: actions/ai-inference@9693b137b6566bb66055a713613bf4f0493701eb # v1.2.3
        with:
          prompt-file: commits.txt
          system-prompt: |
            You are an expert technical writer tasked with generating comprehensive release notes for Donut Browser, a powerful anti-detect browser.

            Analyze the provided commit messages and generate well-structured release notes following this format:

            ## What's New in ${{ steps.get-previous-tag.outputs.current-tag }}

            [Brief 1-2 sentence overview of the release]

            ### ✨ New Features
            [List new features with brief descriptions]

            ### 🐛 Bug Fixes  
            [List bug fixes]

            ### 🔧 Improvements
            [List improvements and enhancements]

            ### 📚 Documentation
            [List documentation updates if any]

            ### 🔄 Dependencies
            [List dependency updates if any]

            ### 🛠️ Developer Experience
            [List development-related changes if any]

            Guidelines:
            - Use clear, user-friendly language
            - Group related commits logically
            - Omit minor commits like formatting, typos unless significant
            - Focus on user-facing changes
            - Use emojis sparingly and consistently
            - Keep descriptions concise but informative
            - If commits are unclear, infer the purpose from the context

            The application is a desktop app built with Tauri + Next.js that helps users manage multiple browser profiles with proxy support.
          model: gpt-4o

      - name: Update release with generated notes
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # Get the generated release notes
          RELEASE_NOTES="${{ steps.generate-notes.outputs.response }}"

          # Update the release with the generated notes
          gh api --method PATCH /repos/${{ github.repository }}/releases/${{ github.event.release.id }} \
            --field body="$RELEASE_NOTES"

          echo "✅ Release notes updated successfully!"

      - name: Cleanup
        run: |
          rm -f commits.txt changes.txt