name: License Header Check

on:
  pull_request:
    branches: [main, dev, dev-angular-19]
    paths:
      - 'src/**/*.ts'
      - 'src/**/*.js'
      - 'src/**/*.html'
      - 'src/**/*.css'
      - 'src/**/*.scss'
  workflow_dispatch: # Allow manual trigger

jobs:
  check-headers:
    name: Validate MPL-2.0 Headers
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Use Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '22'
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Check file headers
        run: |
          echo "Checking for MPL-2.0 license headers in changed files..."

          # Get list of changed files in PR
          BASE_SHA="${{ github.event.pull_request.base.sha }}"
          HEAD_SHA="${{ github.event.pull_request.head.sha }}"

          # Get changed files (added, copied, modified, renamed, type changed)
          CHANGED_FILES=$(git diff --name-only --diff-filter=ACMRT $BASE_SHA $HEAD_SHA | \
            grep -E '\.(ts|js|html|css|scss)$' | \
            grep -v -E '\.(spec\.ts|spec\.js|d\.ts)$' | \
            grep -v -E '(environment\.ts|environment\.prod\.ts|polyfills\.ts|setup-jest\.ts|jest\.config\.ts|node_modules)' || true)

          if [ -z "$CHANGED_FILES" ]; then
            echo "No relevant source files changed in this PR"
            exit 0
          fi

          # Count files
          FILE_COUNT=$(echo "$CHANGED_FILES" | wc -l)
          echo "Checking $FILE_COUNT changed file(s)..."
          echo ""
          echo "$CHANGED_FILES"
          echo ""

          # Run the header check
          echo "$CHANGED_FILES" | xargs node scripts/check-file-headers.js

          if [ $? -eq 0 ]; then
            echo ""
            echo "All changed files have valid MPL-2.0 headers!"
          else
            echo ""
            echo "Header validation failed!"
            echo ""
            echo "To fix locally:"
            echo "   npm run headers:add -- <file-path>"
            echo ""
            echo "   Or add the header manually (see docs/FILE_HEADER_VALIDATION.md)"
            exit 1
          fi

      - name: Comment on PR (if failed)
        if: failure() && github.event_name == 'pull_request'
        uses: actions/github-script@v7
        with:
          script: |
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: '## License Header Validation Failed\n\n' +
                    'Some files are missing the required MPL-2.0 license header.\n\n' +
                    '### How to fix:\n\n' +
                    '1. **Automatically add headers:**\n' +
                    '   ```bash\n' +
                    '   npm run headers:add -- <file-path>\n' +
                    '   ```\n\n' +
                    '2. **Or manually add the header:**\n' +
                    '   ```typescript\n' +
                    '   /**\n' +
                    '    * Copyright since 2025 Mifos Initiative\n' +
                    '    *\n' +
                    '    * This Source Code Form is subject to the terms of the Mozilla Public\n' +
                    '    * License, v. 2.0. If a copy of the MPL was not distributed with this\n' +
                    '    * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n' +
                    '    */\n' +
                    '   ```\n\n' +
                    '3. **Check the build logs above** to see which files need headers.\n\n' +
                    'For more information, see [FILE_HEADER_VALIDATION.md](https://github.com/' + context.repo.owner + '/' + context.repo.repo + '/blob/dev/web-app/docs/FILE_HEADER_VALIDATION.md)'
            })