name: GitHub Bot CI/CD

on:
  push:
    branches:
      - "main"
    paths:
      - "typescript/github-bot/**"
      - "docker/Dockerfile.ghbot"
      - ".github/workflows/github-bot.yml"
  pull_request:
    branches:
      - "main"
    paths:
      - "typescript/github-bot/**"
      - "docker/Dockerfile.ghbot"
      - ".github/workflows/github-bot.yml"
  workflow_dispatch:

permissions:
  contents: read

concurrency:
  group: "github-bot-${{ github.ref }}-${{ github.workflow }}"
  cancel-in-progress: false

jobs:
  test:
    runs-on: ubuntu-latest
    container:
      image: ghcr.io/zkldi/tachi-ci:main
      options: --user root
    steps:
      - name: Checkout
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          persist-credentials: false

      - name: Install dependencies
        run: bun install --frozen-lockfile

      - name: Lint code
        run: bun run --filter tachi-github-bot lint

      - name: Typecheck code
        run: bun run --filter tachi-github-bot typecheck

  docker-push:
    runs-on: ubuntu-latest
    needs: [test]
    if: ${{ github.event_name == 'push' || github.event_name == 'workflow_dispatch' }}
    permissions:
      contents: read
      packages: write
    outputs:
      image_tag: ${{ steps.revision.outputs.image_tag }}
    steps:
      - name: Checkout
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          persist-credentials: false

      - name: Revision tag (YYYYMMDD-shortsha + full SHA aliases)
        id: revision
        run: |
          set -eu
          short=$(git rev-parse --short=7 HEAD)
          d=$(TZ=UTC0 git log -1 --format=%cd --date=format:%Y%m%d HEAD)
          echo "image_tag=${d}-${short}" >> "$GITHUB_OUTPUT"

      - name: Log in to GHCR
        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0

      - name: Set build time
        id: build_time
        run: echo "value=$(date -u +%Y-%m-%dT%H:%M:%SZ)" >> "$GITHUB_OUTPUT"

      - name: Build and push
        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
        with:
          context: .
          file: docker/Dockerfile.ghbot
          push: ${{ github.ref == 'refs/heads/main' }}
          provenance: true
          sbom: true
          tags: |
            ghcr.io/zkldi/tachi-ghbot:${{ steps.revision.outputs.image_tag }}
            ghcr.io/zkldi/tachi-ghbot:${{ github.sha }}
            ghcr.io/zkldi/tachi-ghbot:main
            ghcr.io/zkldi/tachi-ghbot:latest
          build-args: |
            GIT_REVISION=${{ github.sha }}
            BUILD_TIME=${{ steps.build_time.outputs.value }}
          cache-from: type=gha,scope=${{ github.ref_name }}-github-bot
          cache-to: type=gha,mode=max,scope=${{ github.ref_name }}-github-bot

  dispatch-deploy:
    # See server.yml for rationale — deploy logs live in the private tachi-deploy repo.
    runs-on: ubuntu-latest
    needs: [test, docker-push]
    if: ${{ github.ref == 'refs/heads/main' && (github.event_name == 'push' || github.event_name == 'workflow_dispatch') }}
    steps:
      - name: Dispatch deploy
        env:
          GH_TOKEN: ${{ secrets.DEPLOY_DISPATCH_TOKEN }}
          SHA: ${{ github.sha }}
          IMAGE_TAG: ${{ needs.docker-push.outputs.image_tag }}
        run: |
          gh api repos/zkldi/tachi-deploy/dispatches \
            -f event_type=deploy \
            -F "client_payload[app]=ghbot" \
            -F "client_payload[dest]=-" \
            -F "client_payload[sha]=${SHA}" \
            -F "client_payload[image_tag]=${IMAGE_TAG}"
          echo "::notice::Dispatched ghbot ${IMAGE_TAG} (${SHA}) — logs: https://github.com/zkldi/tachi-deploy/actions/workflows/deploy.yml"