name: Update E2E Snapshots

on:
  workflow_dispatch:
    inputs:
      branch:
        description: "Branch to update snapshots on"
        required: true
        default: "main"
  issue_comment:
    types: [created]

permissions:
  contents: write
  pull-requests: write

jobs:
  update-snapshots:
    # Run on workflow_dispatch OR when a maintainer comments "/update-snapshots" on a PR.
    # author_association check prevents arbitrary commenters from triggering a job with
    # contents:write that pushes a [skip ci] commit to the PR branch.
    if: >
      github.event_name == 'workflow_dispatch' ||
      (github.event.issue.pull_request &&
      contains(github.event.comment.body, '/update-snapshots') &&
      contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.comment.author_association))
    runs-on: ubuntu-latest
    steps:
      - name: Get PR branch
        if: github.event_name == 'issue_comment'
        id: pr
        uses: actions/github-script@v8
        with:
          script: |
            const pr = await github.rest.pulls.get({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number
            });
            core.setOutput('ref', pr.data.head.ref);
            core.setOutput('sha', pr.data.head.sha);

      - name: Add reaction to comment
        if: github.event_name == 'issue_comment'
        uses: actions/github-script@v8
        with:
          script: |
            await github.rest.reactions.createForIssueComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              comment_id: context.payload.comment.id,
              content: 'rocket'
            });

      - uses: actions/checkout@v6
        with:
          ref: ${{ github.event.inputs.branch || steps.pr.outputs.ref || github.ref }}
          token: ${{ secrets.GITHUB_TOKEN }}

      - uses: oven-sh/setup-bun@v2
        with:
          bun-version: latest

      - uses: actions/setup-node@v6
        with:
          node-version: "22"
          cache: npm

      - uses: astral-sh/setup-uv@v7

      - run: npm ci

      - name: Install Playwright browsers
        run: npx playwright install --with-deps chromium

      - name: Update snapshots
        run: npx playwright test --update-snapshots --reporter=list

      - name: Commit updated snapshots
        id: commit
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add tests/e2e/**/*.png
          if git diff --staged --quiet; then
            echo "changed=false" >> $GITHUB_OUTPUT
            echo "No snapshot changes to commit"
          else
            git commit -m "chore: update e2e snapshots [skip ci]"
            git push
            echo "changed=true" >> $GITHUB_OUTPUT
          fi

      - name: Comment on PR
        if: github.event_name == 'issue_comment'
        uses: actions/github-script@v8
        with:
          script: |
            const changed = '${{ steps.commit.outputs.changed }}' === 'true';
            const body = changed
              ? '✅ Snapshots updated and pushed to this branch.'
              : '✅ No snapshot changes needed - all snapshots are up to date.';
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body
            });