name: Check Misskey JS autogen

on:
  pull_request_target:
    branches:
      - master
      - develop
      - improve-misskey-js-autogen-check
    paths:
      - packages/backend/**

jobs:
  # pull_request_target safety: permissions: read-all, and there are no secrets used in this job
  generate-misskey-js:
    runs-on: ubuntu-latest
    permissions:
      contents: read
    if: ${{ github.event.pull_request.mergeable == null || github.event.pull_request.mergeable == true }}
    steps:
      - name: checkout
        uses: actions/checkout@v4.1.1
        with:
          submodules: true
          persist-credentials: false
          ref: refs/pull/${{ github.event.pull_request.number }}/merge

      - name: setup pnpm
        uses: pnpm/action-setup@v4

      - name: setup node
        id: setup-node
        uses: actions/setup-node@v4.1.0
        with:
          node-version-file: '.node-version'
          cache: pnpm

      - name: install dependencies
        run: pnpm i --frozen-lockfile

      # generate api.json
      - name: Copy Config
        run: cp .config/example.yml .config/default.yml
      - name: Build
        run: pnpm build
      - name: Generate API JSON
        run: pnpm --filter backend generate-api-json

      # build misskey js
      - name: Build misskey-js
        run: |-
          cp packages/backend/built/api.json packages/misskey-js/generator/api.json
          pnpm run --filter misskey-js-type-generator generate

      # packages/misskey-js/generator/built/autogen
      - name: Upload Generated
        uses: actions/upload-artifact@v4
        with:
          name: generated-misskey-js
          path: packages/misskey-js/generator/built/autogen

  # pull_request_target safety: permissions: read-all, and no user codes are executed
  get-actual-misskey-js:
    runs-on: ubuntu-latest
    permissions:
      contents: read
    if: ${{ github.event.pull_request.mergeable == null || github.event.pull_request.mergeable == true }}
    steps:
      - name: checkout
        uses: actions/checkout@v4.1.1
        with:
          submodules: true
          persist-credentials: false
          ref: refs/pull/${{ github.event.pull_request.number }}/merge

      - name: Upload From Merged
        uses: actions/upload-artifact@v4
        with:
          name: actual-misskey-js
          path: packages/misskey-js/src/autogen

  # pull_request_target safety: nothing is cloned from repository
  comment-misskey-js-autogen:
    runs-on: ubuntu-latest
    needs: [generate-misskey-js, get-actual-misskey-js]
    permissions:
      pull-requests: write
    steps:
      - name: download generated-misskey-js
        uses: actions/download-artifact@v4
        with:
          name: generated-misskey-js
          path: misskey-js-generated

      - name: download actual-misskey-js
        uses: actions/download-artifact@v4
        with:
          name: actual-misskey-js
          path: misskey-js-actual

      - name: check misskey-js changes
        id: check-changes
        run: |
          diff -r -u --label=generated --label=on-tree ./misskey-js-generated ./misskey-js-actual > misskey-js.diff || true

          if [ -s misskey-js.diff ]; then
            echo "changes=true" >> $GITHUB_OUTPUT
          else
            echo "changes=false" >> $GITHUB_OUTPUT
          fi

      - name: Print full diff
        run: cat ./misskey-js.diff

      - name: send message
        if: steps.check-changes.outputs.changes == 'true'
        uses: thollander/actions-comment-pull-request@v2
        with:
          comment_tag: check-misskey-js-autogen
          message: |-
            Thank you for sending us a great Pull Request! 👍
            Please regenerate misskey-js type definitions! 🙏

            example:
            ```sh
            pnpm run build-misskey-js-with-types
            ```

      - name: send message
        if: steps.check-changes.outputs.changes == 'false'
        uses: thollander/actions-comment-pull-request@v2
        with:
          comment_tag: check-misskey-js-autogen
          mode: delete
          message: "Thank you!"
          create_if_not_exists: false

      - name: Make failure if changes are detected
        if: steps.check-changes.outputs.changes == 'true'
        run: exit 1