name: Claude Issue Implementation

on:
  issue_comment:
    types: [created]

permissions:
  contents: write
  issues: write
  pull-requests: write
  id-token: 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 user permissions
        uses: actions/github-script@v7
        with:
          script: |
            const username = context.actor;

            // Method 1: Specific privileged users list
            const privilegedUsers = [
              'bvdaakster'          // Only this user can use Claude
            ];

            // Method 2: Check repository permission level
            const { data: collaborator } = await github.rest.repos.getCollaboratorPermissionLevel({
              owner: context.repo.owner,
              repo: context.repo.repo,
              username: username
            });

            // Method 3: Check organization membership (if applicable)
            let isOrgMember = false;
            try {
              await github.rest.orgs.getMembershipForUser({
                org: context.repo.owner,
                username: username
              });
              isOrgMember = true;
            } catch (error) {
              // User is not an org member or org doesn't exist
              isOrgMember = false;
            }

            // Combined permission check
            const isPrivilegedUser = privilegedUsers.includes(username);
            const hasAdminAccess = collaborator.permission === 'admin';
            const hasWriteAccess = ['admin', 'write'].includes(collaborator.permission);

            // Choose your permission strategy:
            // Option A: Only specific users
            const allowedByUserList = isPrivilegedUser;

            // Option B: Only admins
            const allowedByAdminAccess = hasAdminAccess;

            // Option C: Admin + specific users
            const allowedByAdminOrPrivileged = hasAdminAccess || isPrivilegedUser;

            // Option D: Organization members with write access
            const allowedByOrgAndWrite = isOrgMember && hasWriteAccess;

            // Set your chosen strategy here:
            const isAllowed = isPrivilegedUser; // Only bvdaakster can use Claude

            if (!isAllowed) {
              const errorMessage = `❌ **Access Denied**: Claude implementation is restricted to privileged users only.

              **Your access level**: ${collaborator.permission}
              **Privileged user**: ${isPrivilegedUser ? 'Yes' : 'No'}
              **Organization member**: ${isOrgMember ? 'Yes' : 'No'}

              Contact a repository administrator for access.`;

              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                body: errorMessage
              });
              throw new Error('Insufficient permissions for Claude implementation');
            }

            // Log successful access
            console.log(`✅ Access granted to ${username} (${collaborator.permission})`);

      - 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: Implement with Claude
        id: implementation
        uses: anthropics/claude-code-action@beta
        with:
          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}

          # Direct prompt with issue context
          direct_prompt: |
            Please implement the feature or fix described in this GitHub issue:

            **Issue #${{ github.event.issue.number }}**: ${{ github.event.issue.title }}

            **Issue Description**:
            ${{ github.event.issue.body }}

            **Implementation Request**:
            ${{ github.event.comment.body }}

            **Instructions**:
            1. Analyze the issue requirements carefully
            2. Follow the existing code patterns and conventions in this PayloadCMS plugin
            3. Add appropriate tests if needed (check for existing test patterns)
            4. Update documentation if necessary
            5. Ensure the implementation is complete and working
            6. Use TypeScript with proper typing
            7. Follow the project's ESM module structure with .js extensions

            The implementation should be production-ready and follow best practices for a PayloadCMS plugin.

            **Repository Context**: This is the @xtr-dev/payload-billing plugin for PayloadCMS.
            **Branch**: ${{ steps.create-branch.outputs.branch_name }}

          # Allow Claude to run necessary commands
          allowed_tools: "Bash(pnpm build),Bash(pnpm typecheck),Bash(pnpm lint),Bash(npm run test)"

      - 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.`
            });