name: 'Release: Patch (1) Create PR'

on:
  workflow_dispatch:
    inputs:
      commit:
        description: 'The commit SHA to cherry-pick for the patch.'
        required: true
        type: 'string'
      channel:
        description: 'The release channel to patch.'
        required: true
        type: 'choice'
        options:
          - 'stable'
          - 'preview'
      dry_run:
        description: 'Whether to run in dry-run mode.'
        required: false
        type: 'boolean'
        default: false
      ref:
        description: 'The branch, tag, or SHA to test from.'
        required: false
        type: 'string'
        default: 'main'
      original_pr:
        description: 'The original PR number to comment back on.'
        required: false
        type: 'string'

jobs:
  create-patch:
    runs-on: 'ubuntu-latest'
    permissions:
      contents: 'write'
      pull-requests: 'write'
    steps:
      - name: 'Checkout'
        uses: 'actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8' # ratchet:actions/checkout@v5
        with:
          ref: '${{ github.event.inputs.ref }}'
          fetch-depth: 0

      - name: 'Setup Node.js'
        uses: 'actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020' # ratchet:actions/setup-node@v4
        with:
          node-version-file: '.nvmrc'
          cache: 'npm'

      - name: 'Install Dependencies'
        run: 'npm ci'

      - name: 'Configure Git User'
        run: |-
          git config user.name "gemini-cli-robot"
          git config user.email "gemini-cli-robot@google.com"

      - name: 'Generate GitHub App Token'
        id: 'generate_token'
        uses: 'actions/create-github-app-token@a8d616148505b5069dccd32f177bb87d7f39123b'
        with:
          app-id: '${{ secrets.APP_ID }}'
          private-key: '${{ secrets.PRIVATE_KEY }}'
          permission-pull-requests: 'write'
          permission-contents: 'write'

      - name: 'Create Patch for Stable'
        id: 'create_patch_stable'
        if: "github.event.inputs.channel == 'stable'"
        env:
          GH_TOKEN: '${{ steps.generate_token.outputs.token }}'
        continue-on-error: true
        run: |
          node scripts/create-patch-pr.js --commit=${{ github.event.inputs.commit }} --channel=stable --dry-run=${{ github.event.inputs.dry_run }} > patch_output.log 2>&1
          echo "EXIT_CODE=$?" >> "$GITHUB_OUTPUT"
          cat patch_output.log

      - name: 'Create Patch for Preview'
        id: 'create_patch_preview'
        if: "github.event.inputs.channel != 'stable'"
        env:
          GH_TOKEN: '${{ steps.generate_token.outputs.token }}'
        continue-on-error: true
        run: |
          node scripts/create-patch-pr.js --commit=${{ github.event.inputs.commit }} --channel=${{ github.event.inputs.channel }} --dry-run=${{ github.event.inputs.dry_run }} > patch_output.log 2>&1
          echo "EXIT_CODE=$?" >> "$GITHUB_OUTPUT"
          cat patch_output.log

      - name: 'Comment on Original PR'
        if: '!inputs.dry_run && inputs.original_pr'
        env:
          GH_TOKEN: '${{ steps.generate_token.outputs.token }}'
        run: |
          # Determine which step ran based on channel
          if [ "${{ github.event.inputs.channel }}" = "stable" ]; then
            EXIT_CODE="${{ steps.create_patch_stable.outputs.EXIT_CODE }}"
          else
            EXIT_CODE="${{ steps.create_patch_preview.outputs.EXIT_CODE }}"
          fi

          # Check if patch output exists and contains branch info
          if [ -f patch_output.log ]; then
            if grep -q "already exists" patch_output.log; then
              # Branch exists - find the PR for it
              BRANCH=$(grep "Hotfix branch" patch_output.log | grep "already exists" | sed 's/.*Hotfix branch \(.*\) already exists.*/\1/')

              # Find the PR for this branch
              PR_INFO=$(gh pr list --head "$BRANCH" --json number,url --jq '.[0] // empty')

              if [ -n "$PR_INFO" ]; then
                PR_NUMBER=$(echo "$PR_INFO" | jq -r '.number')
                PR_URL=$(echo "$PR_INFO" | jq -r '.url')
                MESSAGE="ℹ️ Patch branch already exists!\n\nA patch branch already exists with an open PR: [#$PR_NUMBER]($PR_URL)\n\nPlease review and approve this existing patch PR. If it's incorrect, close it and run the patch command again."
                gh pr comment ${{ github.event.inputs.original_pr }} --body "$MESSAGE"
              else
                # Branch exists but no PR
                MESSAGE="ℹ️ Patch branch already exists!\n\nA patch branch [\`$BRANCH\`](https://github.com/${{ github.repository }}/tree/$BRANCH) exists but has no open PR.\n\nThis might indicate an incomplete patch process. Please delete the branch and run the patch command again."
                gh pr comment ${{ github.event.inputs.original_pr }} --body "$MESSAGE"
              fi

            elif [ "$EXIT_CODE" = "0" ]; then
              # Success - find the newly created PR
              BRANCH=$(grep "Creating hotfix branch" patch_output.log | sed 's/.*Creating hotfix branch \(.*\) from.*/\1/')

              # Find the PR for the new branch
              PR_INFO=$(gh pr list --head "$BRANCH" --json number,url --jq '.[0] // empty')

              if [ -n "$PR_INFO" ]; then
                PR_NUMBER=$(echo "$PR_INFO" | jq -r '.number')
                PR_URL=$(echo "$PR_INFO" | jq -r '.url')
                MESSAGE="🚀 Patch PR created!\n\nThe patch release PR has been created: [#$PR_NUMBER]($PR_URL)\n\nPlease review and approve this PR to complete the patch release."
                gh pr comment ${{ github.event.inputs.original_pr }} --body "$MESSAGE"
              else
                # Fallback if we can't find the specific PR
                MESSAGE="🚀 Patch PR created!\n\nThe patch release PR for this change has been created. Please review and approve it:\n\n[View all patch PRs](https://github.com/${{ github.repository }}/pulls?q=is%3Apr+is%3Aopen+label%3Apatch)"
                gh pr comment ${{ github.event.inputs.original_pr }} --body "$MESSAGE"
              fi
            else
              # Other error
              MESSAGE="❌ Patch creation failed!\n\nThere was an error creating the patch. Please check the workflow logs for details:\n[View workflow run](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})"
              gh pr comment ${{ github.event.inputs.original_pr }} --body "$MESSAGE"
            fi
          else
            MESSAGE="❌ Patch creation failed!\n\nNo output was generated. Please check the workflow logs:\n[View workflow run](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})"
            gh pr comment ${{ github.event.inputs.original_pr }} --body "$MESSAGE"
          fi