name: Claude Issue Implementation

on:
  issue_comment:
    types: [created]

permissions:
  contents: write
  issues: write
  pull-requests: write

jobs:
  claude-implement:
    if: |
      github.event.issue_comment.issue.state == 'open' &&
      (
        contains(github.event.comment.body, '@claude implement') ||
        contains(github.event.comment.body, '@claude fix') ||
        contains(github.event.comment.body, '@claude create')
      )
    runs-on: ubuntu-latest

    steps:
      - name: Check if user has write access
        uses: actions/github-script@v7
        with:
          script: |
            const { data: collaborator } = await github.rest.repos.getCollaboratorPermissionLevel({
              owner: context.repo.owner,
              repo: context.repo.repo,
              username: context.actor
            });

            const hasWriteAccess = ['admin', 'write'].includes(collaborator.permission);
            if (!hasWriteAccess) {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                body: `❌ Only collaborators with write access can request Claude implementation. Your permission level: ${collaborator.permission}`
              });
              throw new Error('Insufficient permissions');
            }

      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '22'
          cache: 'npm'

      - name: Install pnpm
        run: npm install -g pnpm@10.12.4

      - name: Create Claude implementation branch
        id: create-branch
        run: |
          # Create a unique branch name based on issue number and timestamp
          BRANCH_NAME="claude/issue-${{ github.event.issue.number }}-$(date +%Y%m%d-%H%M%S)"
          echo "branch_name=$BRANCH_NAME" >> $GITHUB_OUTPUT

          # Create and switch to the new branch
          git checkout -b "$BRANCH_NAME"
          git push origin "$BRANCH_NAME"

      - name: Add comment with implementation start
        uses: actions/github-script@v7
        with:
          script: |
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: `🤖 **Claude Implementation Started**

              I'm now working on implementing this issue. Here's what I'm doing:

              📋 **Issue**: #${{ github.event.issue.number }} - ${{ github.event.issue.title }}
              🌿 **Branch**: \`${{ steps.create-branch.outputs.branch_name }}\`
              ⏱️ **Started**: ${new Date().toISOString()}

              I'll analyze the requirements and create a pull request with the implementation. This may take a few minutes...

              You can track the progress in the [Actions tab](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}).`
            });

      - name: Install Claude Code CLI
        run: |
          # Install Claude Code CLI - adjust this based on available installation method
          curl -fsSL https://claude.ai/install.sh | bash || echo "Claude CLI installation skipped - using alternative method"

      - name: Prepare implementation context
        id: context
        run: |
          # Create a context file with issue details
          cat > implementation-context.md << 'EOF'
          # Implementation Request

          **Issue Number**: #${{ github.event.issue.number }}
          **Issue Title**: ${{ github.event.issue.title }}
          **Issue Body**:
          ${{ github.event.issue.body }}

          **Comment Trigger**:
          ${{ github.event.comment.body }}

          **Repository**: ${{ github.repository }}
          **Branch**: ${{ steps.create-branch.outputs.branch_name }}

          # Instructions
          Please implement the feature or fix described in the issue above. Make sure to:
          1. Follow the existing code patterns and conventions
          2. Add appropriate tests if needed
          3. Update documentation if necessary
          4. Ensure the implementation is complete and working
          5. Create a clear commit message describing the changes

          The implementation should be production-ready and follow best practices.
          EOF

      - name: Implement with Claude
        id: implementation
        env:
          CLAUDE_API_KEY: ${{ secrets.CLAUDE_API_KEY }}
        run: |
          # This is a placeholder for Claude implementation
          # In practice, this would call Claude Code CLI or API

          echo "Starting Claude implementation..."

          # Simulate implementation work
          # In real usage, this would use Claude Code CLI:
          # claude-code --file implementation-context.md --implement

          # For now, create a placeholder implementation
          echo "🤖 Claude implementation completed" > claude-implementation.log

          # Set output for next steps
          echo "implemented=true" >> $GITHUB_OUTPUT

      - name: Check for changes
        id: changes
        run: |
          if git diff --quiet; then
            echo "has_changes=false" >> $GITHUB_OUTPUT
            echo "No changes were made during implementation"
          else
            echo "has_changes=true" >> $GITHUB_OUTPUT
            echo "Changes detected, preparing commit"
          fi

      - name: Commit changes
        if: steps.changes.outputs.has_changes == 'true'
        run: |
          git config --local user.email "action@github.com"
          git config --local user.name "Claude Implementation Bot"

          git add .
          git commit -m "$(cat <<'EOF'
          feat: implement issue #${{ github.event.issue.number }} - ${{ github.event.issue.title }}

          Implemented via Claude automation based on issue requirements.

          Issue: #${{ github.event.issue.number }}
          Requested by: @${{ github.event.comment.user.login }}

          🤖 Generated with Claude Automation

          Co-Authored-By: Claude <noreply@anthropic.com>
          EOF
          )"

          git push origin ${{ steps.create-branch.outputs.branch_name }}

      - name: Create Pull Request
        if: steps.changes.outputs.has_changes == 'true'
        uses: actions/github-script@v7
        id: create-pr
        with:
          script: |
            const { data: pr } = await github.rest.pulls.create({
              owner: context.repo.owner,
              repo: context.repo.repo,
              title: `🤖 Implement: ${{ github.event.issue.title }}`,
              head: '${{ steps.create-branch.outputs.branch_name }}',
              base: 'dev',
              body: `## 🤖 Claude Implementation

              This PR was automatically created by Claude to implement the feature/fix requested in issue #${{ github.event.issue.number }}.

              ### 📋 Issue Details
              - **Issue**: #${{ github.event.issue.number }}
              - **Title**: ${{ github.event.issue.title }}
              - **Requested by**: @${{ github.event.comment.user.login }}
              - **Branch**: \`${{ steps.create-branch.outputs.branch_name }}\`

              ### 🔍 Implementation
              Claude analyzed the issue requirements and implemented the requested changes following the project's coding standards and best practices.

              ### ✅ Review Checklist
              - [ ] Code follows project conventions
              - [ ] Tests are included (if applicable)
              - [ ] Documentation is updated (if needed)
              - [ ] Implementation matches issue requirements
              - [ ] No breaking changes (unless intended)

              ### 🔗 Related
              Closes #${{ github.event.issue.number }}

              ---

              **Note**: This implementation was generated automatically. Please review carefully before merging.

              🤖 *Generated with Claude Automation*`
            });

            return pr.number;

      - name: Update issue with success
        if: steps.changes.outputs.has_changes == 'true'
        uses: actions/github-script@v7
        with:
          script: |
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: `✅ **Implementation Complete!**

              I've successfully implemented the requested changes and created a pull request:

              🎯 **Pull Request**: #${{ steps.create-pr.outputs.result }}
              🌿 **Branch**: \`${{ steps.create-branch.outputs.branch_name }}\`
              ⏱️ **Completed**: ${new Date().toISOString()}

              ## Next Steps
              1. Review the implementation in the pull request
              2. Test the changes locally if needed
              3. Merge the PR if everything looks good

              The implementation follows the project's coding standards and includes appropriate documentation.`
            });

      - name: Update issue with no changes
        if: steps.changes.outputs.has_changes == 'false'
        uses: actions/github-script@v7
        with:
          script: |
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: `⚠️ **Implementation Completed - No Changes**

              I analyzed the issue but determined that no code changes are needed. This might be because:

              - The feature is already implemented
              - The issue requires clarification
              - The request is not actionable as a code change
              - Additional information is needed

              🌿 **Branch**: \`${{ steps.create-branch.outputs.branch_name }}\` (will be cleaned up)

              Please review the issue requirements and provide additional details if needed.`
            });

      - name: Clean up branch if no changes
        if: steps.changes.outputs.has_changes == 'false'
        run: |
          git push origin --delete ${{ steps.create-branch.outputs.branch_name }} || true

      - name: Handle implementation failure
        if: failure()
        uses: actions/github-script@v7
        with:
          script: |
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: `❌ **Implementation Failed**

              I encountered an error while trying to implement this issue. Please check the [workflow logs](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}) for details.

              Common reasons for failure:
              - Issue requirements are unclear or incomplete
              - Technical constraints prevent implementation
              - Repository permissions or configuration issues

              You can try again by commenting \`@claude implement\` or provide more specific requirements.`
            });