name: '📋 Gemini Scheduled Issue Triage'

on:
  schedule:
    - cron: '0 * * * *' # Runs every hour
  workflow_dispatch:

concurrency:
  group: '${{ github.workflow }}'
  cancel-in-progress: true

defaults:
  run:
    shell: 'bash'

permissions:
  contents: 'read'
  id-token: 'write'
  issues: 'write'
  statuses: 'write'

jobs:
  triage-issues:
    timeout-minutes: 5
    runs-on: 'ubuntu-latest'

    steps:
      - name: 'Checkout repository'
        uses: 'actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683' # ratchet:actions/checkout@v4

      - name: 'Generate GitHub App Token'
        id: 'generate_token'
        if: |-
          ${{ vars.APP_ID }}
        uses: 'actions/create-github-app-token@df432ceedc7162793a195dd1713ff69aefc7379e' # ratchet:actions/create-github-app-token@v2
        with:
          app-id: '${{ vars.APP_ID }}'
          private-key: '${{ secrets.APP_PRIVATE_KEY }}'

      - name: 'Find untriaged issues'
        id: 'find_issues'
        env:
          GITHUB_TOKEN: '${{ steps.generate_token.outputs.token || secrets.GITHUB_TOKEN }}'
          GITHUB_REPOSITORY: '${{ github.repository }}'
          GITHUB_OUTPUT: '${{ github.output }}'
        run: |-
          set -euo pipefail

          echo '🔍 Finding issues without labels...'
          NO_LABEL_ISSUES="$(gh issue list --repo "${GITHUB_REPOSITORY}" \
            --search 'is:open is:issue no:label' --json number,title,body)"

          echo '🏷️ Finding issues that need triage...'
          NEED_TRIAGE_ISSUES="$(gh issue list --repo "${GITHUB_REPOSITORY}" \
            --search 'is:open is:issue label:"status/needs-triage"' --json number,title,body)"

          echo '🔄 Merging and deduplicating issues...'
          ISSUES="$(echo "${NO_LABEL_ISSUES}" "${NEED_TRIAGE_ISSUES}" | jq -c -s 'add | unique_by(.number)')"

          echo '📝 Setting output for GitHub Actions...'
          echo "issues_to_triage=${ISSUES}" >> "${GITHUB_OUTPUT}"

          ISSUE_COUNT="$(echo "${ISSUES}" | jq 'length')"
          echo "✅ Found ${ISSUE_COUNT} issues to triage! 🎯"

      - name: 'Run Gemini Issue Triage'
        if: |-
          ${{ steps.find_issues.outputs.issues_to_triage != '[]' }}
        uses: 'google-github-actions/run-gemini-cli@v0'
        id: 'gemini_issue_triage'
        env:
          GITHUB_TOKEN: '${{ steps.generate_token.outputs.token || secrets.GITHUB_TOKEN }}'
          ISSUES_TO_TRIAGE: '${{ steps.find_issues.outputs.issues_to_triage }}'
          REPOSITORY: '${{ github.repository }}'
        with:
          gemini_cli_version: '${{ vars.GEMINI_CLI_VERSION }}'
          gcp_workload_identity_provider: '${{ vars.GCP_WIF_PROVIDER }}'
          gcp_project_id: '${{ vars.GOOGLE_CLOUD_PROJECT }}'
          gcp_location: '${{ vars.GOOGLE_CLOUD_LOCATION }}'
          gcp_service_account: '${{ vars.SERVICE_ACCOUNT_EMAIL }}'
          gemini_api_key: '${{ secrets.GEMINI_API_KEY }}'
          use_vertex_ai: '${{ vars.GOOGLE_GENAI_USE_VERTEXAI }}'
          use_gemini_code_assist: '${{ vars.GOOGLE_GENAI_USE_GCA }}'
          settings: |-
            {
              "maxSessionTurns": 25,
              "coreTools": [
                "run_shell_command(echo)",
                "run_shell_command(gh label list)",
                "run_shell_command(gh issue edit)",
                "run_shell_command(gh issue list)"
              ],
              "telemetry": {
                "enabled": false,
                "target": "gcp"
              }
            }
          prompt: |-
            ## Role

            You are an issue triage assistant. Analyze issues and apply
            appropriate labels. Use the available tools to gather information;
            do not ask for information to be provided.

            ## Steps

            1. Run: `gh label list`
            2. Check environment variable: "${ISSUES_TO_TRIAGE}" (JSON array
               of issues)
            3. For each issue, apply labels:
               `gh issue edit "${ISSUE_NUMBER}" --add-label "label1,label2"`.
               If available, set labels that follow the `kind/*`, `area/*`,
               and `priority/*` patterns.
            4. For each issue, if the `status/needs-triage` label is present,
               remove it using:
               `gh issue edit "${ISSUE_NUMBER}" --remove-label "status/needs-triage"`

            ## Guidelines

            - Only use existing repository labels
            - Do not add comments
            - Triage each issue independently
            - Reference all shell variables as "${VAR}" (with quotes and braces)