name: Create Release on Merge

on:
  push:
    branches:
      - master
  workflow_dispatch:

jobs:
  release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: read

    steps:
      - name: Checkout repo branch
        uses: actions/checkout@v4
        with:
          ref: repo
          fetch-depth: 0

      # Get the merged PR info (only if not triggered manually)
      - name: Get PR information
        id: pr_info
        if: github.event_name == 'push'
        run: |
          # Check out the master branch to get the PR info
          git fetch origin master:master
          git checkout master
          
          # Find the merge commit that triggered this workflow
          MERGE_COMMIT=$(git rev-parse HEAD)
          
          # Check if this is a merge commit
          if git show --summary $MERGE_COMMIT | grep -q "Merge pull request"; then
            # Extract PR number from merge commit message
            PR_NUMBER=$(git log -1 --pretty=%B | grep -oP 'Merge pull request #\K\d+')
          
            if [ -n "$PR_NUMBER" ]; then
              echo "pr_number=$PR_NUMBER" >> $GITHUB_OUTPUT
          
              # Get PR details
              PR_JSON=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
                https://api.github.com/repos/${{ github.repository }}/pulls/$PR_NUMBER)
          
              PR_TITLE=$(echo "$PR_JSON" | jq -r .title)
              echo "pr_title=$PR_TITLE" >> $GITHUB_OUTPUT
          
              PR_AUTHOR=$(echo "$PR_JSON" | jq -r .user.login)
              echo "pr_author=$PR_AUTHOR" >> $GITHUB_OUTPUT
          
              # Check if first-time contributor
              CONTRIBUTOR_JSON=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
                https://api.github.com/repos/${{ github.repository }}/contributors/$PR_AUTHOR)
              CONTRIBUTIONS=$(echo "$CONTRIBUTOR_JSON" | jq -r .contributions)
          
              if [ "$CONTRIBUTIONS" = "1" ]; then
                echo "is_first_contributor=true" >> $GITHUB_OUTPUT
              fi
          
              # Get PR body
              PR_BODY=$(echo "$PR_JSON" | jq -r .body)
              echo "pr_body=$PR_BODY" >> $GITHUB_OUTPUT
            fi
          fi

      # Find the Kavita APK and extract version
      - name: Find APK and extract version
        id: apk_info
        run: |
          # Find the Kavita APK in the apk folder
          APK_PATH=$(find ./apk -name "tachiyomi-all.kavita-*.apk" -type f | head -n 1)
          
          if [ -z "$APK_PATH" ]; then
            echo "No Kavita APK found in ./apk folder!"
            exit 1
          fi
          
          echo "apk_path=$APK_PATH" >> $GITHUB_OUTPUT
          
          # Extract version from filename (tachiyomi-all.kavita-v1.4.21.apk -> v1.4.21)
          APK_FILENAME=$(basename "$APK_PATH")
          VERSION=$(echo "$APK_FILENAME" | grep -oP 'v\d+\.\d+\.\d+')
          
          if [ -z "$VERSION" ]; then
            echo "Could not extract version from filename: $APK_FILENAME"
            VERSION="v$(date +%Y%m%d-%H%M%S)"
          fi
          
          echo "version=$VERSION" >> $GITHUB_OUTPUT
          echo "apk_name=$APK_FILENAME" >> $GITHUB_OUTPUT
          
          echo "Found APK: $APK_PATH"
          echo "Extracted version: $VERSION"

      # Get commit messages since last tag
      - name: Get changelog
        id: changelog
        run: |
          # Switch to master branch to get git history
          git checkout master
          
          # Get the last tag
          LAST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
          
          if [ -n "$LAST_TAG" ]; then
            COMMITS=$(git log $LAST_TAG..HEAD --pretty=format:"- %s (%h)")
          else
            COMMITS=$(git log --pretty=format:"- %s (%h)" -n 20)
          fi
          
          echo "changelog<<EOF" >> $GITHUB_OUTPUT
          echo "$COMMITS" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT

      # Create the release (on the repo branch)
      - name: Create Release
        uses: softprops/action-gh-release@v2
        with:
          name: Release ${{ steps.apk_info.outputs.version }}
          tag_name: ${{ steps.apk_info.outputs.version }}
          target_commitish: repo
          body: |
            ## 🚀 Release ${{ steps.apk_info.outputs.version }}
            
            ### 📝 Pull Request
            ${{ steps.pr_info.outputs.pr_number && format('- Pull Request #%s by @%s', steps.pr_info.outputs.pr_number, steps.pr_info.outputs.pr_author) || 'Manual release' }}
            ${{ steps.pr_info.outputs.pr_title && format('- Title: %s', steps.pr_info.outputs.pr_title) || '' }}
            ${{ steps.pr_info.outputs.is_first_contributor == 'true' && format('### 🎉 Welcome @%s on their first contribution!', steps.pr_info.outputs.pr_author) || '' }}
            
            ${{ steps.pr_info.outputs.pr_body && format('### 📋 Description:\n%s', steps.pr_info.outputs.pr_body) || '' }}
            
            ### 📦 Changes since last release:
            ${{ steps.changelog.outputs.changelog }}
            
            ---
            🤖 *This release was automatically created*
          files: ${{ steps.apk_info.outputs.apk_path }}
          draft: false
          prerelease: false
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Notify on failure
        if: failure()
        run: |
          echo "Release creation failed. Check the logs for details."