name: Deprecated

on:
  pull_request_target:
    types: [opened, synchronize]

permissions:
  issues: write
  contents: read
  pull-requests: write

jobs:
  deprecated:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout PR
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v46
        with:
          files: |
            apps/www/**
          files_ignore: |
            apps/www/public/r/**
          base_sha: ${{ github.event.pull_request.base.sha }}
          sha: ${{ github.event.pull_request.head.sha }}

      - name: Comment on PR if www files changed
        if: steps.changed-files.outputs.any_changed == 'true'
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const changedFiles = `${{ steps.changed-files.outputs.all_changed_files }}`.split(' ');
            const wwwFiles = changedFiles.filter(file =>
              file.startsWith('apps/www/') &&
              !file.startsWith('apps/www/public/r/') &&
              file !== 'apps/www/package.json'
            );

            if (wwwFiles.length > 0) {
              const comment = `Looks like this PR modifies files in \`apps/www\`, which is deprecated.

              Consider applying the change to \`apps/v4\` if relevant.`;

              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                body: comment
              });

              // Add deprecated label
              await github.rest.issues.addLabels({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                labels: ['deprecated']
              });
            } else {
              // Remove deprecated label if no www files are changed
              try {
                await github.rest.issues.removeLabel({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: context.issue.number,
                  name: 'deprecated'
                });
              } catch (error) {
                // Label doesn't exist, which is fine
                console.log('Deprecated label not found, skipping removal');
              }
            }