name: Frontend License Report Workflow

on:
  push:
    branches:
      - V2
    paths:
      - "frontend/package.json"
      - "frontend/package-lock.json"
      - "frontend/scripts/generate-licenses.js"
  pull_request:
    branches:
      - V2
    paths:
      - "frontend/package.json"
      - "frontend/package-lock.json"
      - "frontend/scripts/generate-licenses.js"

permissions:
  contents: read

jobs:
  generate-frontend-license-report:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
      repository-projects: write # Required for enabling automerge
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
        with:
          egress-policy: audit

      - name: Checkout PR head (default)
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          fetch-depth: 0
          persist-credentials: false

      - name: Setup GitHub App Bot
        if: github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false)
        id: setup-bot
        uses: ./.github/actions/setup-bot
        with:
          app-id: ${{ secrets.GH_APP_ID }}
          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}

      - name: Checkout BASE branch (safe script)
        if: github.event_name == 'pull_request'
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          ref: ${{ github.event.pull_request.base.sha }}
          path: base
          fetch-depth: 1
          persist-credentials: false

      - name: Set up Node.js
        uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # v4.1.0
        with:
          node-version: '18'
          cache: 'npm'
          cache-dependency-path: frontend/package-lock.json

      - name: Install frontend dependencies
        working-directory: frontend
        env:
          NPM_CONFIG_IGNORE_SCRIPTS: "true"
        run: npm ci --ignore-scripts --audit=false --fund=false

      - name: Generate frontend license report (internal PR)
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false
        working-directory: frontend
        env:
          PR_IS_FORK: "false"
        run: npm run generate-licenses

      - name: Generate frontend license report (fork PRs, pinned)
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == true
        env:
          NPM_CONFIG_IGNORE_SCRIPTS: "true"
        working-directory: frontend
        run: |
          mkdir -p src/assets
          npx --yes license-report --only=prod --output=json > src/assets/3rdPartyLicenses.json

      - name: Postprocess with project script (BASE version)
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == true
        env:
          PR_IS_FORK: "true"
        run: |
          node base/frontend/scripts/generate-licenses.js \
            --input frontend/src/assets/3rdPartyLicenses.json

      - name: Copy postprocessed artifacts back (fork PRs)
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == true
        run: |
          mkdir -p frontend/src/assets
          if [ -f "base/frontend/src/assets/3rdPartyLicenses.json" ]; then
            cp base/frontend/src/assets/3rdPartyLicenses.json frontend/src/assets/3rdPartyLicenses.json
          fi
          if [ -f "base/frontend/src/assets/license-warnings.json" ]; then
            cp base/frontend/src/assets/license-warnings.json frontend/src/assets/license-warnings.json
          fi

      - name: Check for license warnings
        run: |
          if [ -f "frontend/src/assets/license-warnings.json" ]; then
            echo "LICENSE_WARNINGS_EXIST=true" >> $GITHUB_ENV
          else
            echo "LICENSE_WARNINGS_EXIST=false" >> $GITHUB_ENV
          fi

      # PR Event: Check licenses and comment on PR
      - name: Delete previous license check comments
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
        with:
          github-token: ${{ steps.setup-bot.outputs.token }}
          script: |
            const { owner, repo } = context.repo;
            const prNumber = context.issue.number;
            
            // Get all comments on the PR
            const { data: comments } = await github.rest.issues.listComments({
              owner,
              repo,
              issue_number: prNumber,
              per_page: 100
            });
            
            // Filter for license check comments
            const licenseComments = comments.filter(comment => 
              comment.body.includes('## ✅ Frontend License Check Passed') ||
              comment.body.includes('## ❌ Frontend License Check Failed')
            );
            
            // Delete old license check comments
            for (const comment of licenseComments) {
              console.log(`Deleting old license check comment: ${comment.id}`);
              await github.rest.issues.deleteComment({
                owner,
                repo,
                comment_id: comment.id
              });
            }

      - name: Summarize results (fork PRs)
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == true
        run: |
          {
            echo "## Frontend License Check"
            echo ""
            if [ "${LICENSE_WARNINGS_EXIST}" = "true" ]; then
              echo "❌ **Failed** – incompatible or unknown licenses found."
              if [ -f "frontend/src/assets/license-warnings.json" ]; then
                echo ""
                echo "### Warnings"
                jq -r '.warnings[] | "- \(.message)"' frontend/src/assets/license-warnings.json || true
              fi
            else
              echo "✅ **Passed** – no license warnings detected."
            fi
            echo ""
            echo "_Note: This is a fork PR. PR comments are disabled; use this summary._"
          } >> "$GITHUB_STEP_SUMMARY"

      - name: Comment on PR - License Check Results
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
        with:
          github-token: ${{ steps.setup-bot.outputs.token }}
          script: |
            const { owner, repo } = context.repo;
            const prNumber = context.issue.number;
            const hasWarnings = process.env.LICENSE_WARNINGS_EXIST === 'true';
            
            let commentBody;
            
            if (hasWarnings) {
              // Read warnings file to get specific issues
              const fs = require('fs');
              let warningDetails = '';
              try {
                const warnings = JSON.parse(fs.readFileSync('frontend/src/assets/license-warnings.json', 'utf8'));
                warningDetails = warnings.warnings.map(w => `- ${w.message}`).join('\n');
              } catch (e) {
                warningDetails = 'Unable to read warning details';
              }
              
              commentBody = `## ❌ Frontend License Check Failed
              
              The frontend license check has detected compatibility warnings that require review:

              ${warningDetails}

              **Action Required:** Please review these licenses to ensure they are acceptable for your use case before merging.

              _This check will fail the PR until license issues are resolved._`;
            } else {
              commentBody = `## ✅ Frontend License Check Passed
              
              All frontend licenses have been validated and no compatibility warnings were detected.

              The frontend license report has been updated successfully.`;
            }
            
            await github.rest.issues.createComment({
              owner,
              repo,
              issue_number: prNumber,
              body: commentBody
            });

      - name: Fail workflow if license warnings exist (PR only)
        if: github.event_name == 'pull_request' && env.LICENSE_WARNINGS_EXIST == 'true'
        run: |
          echo "❌ License warnings detected. Failing the workflow."
          exit 1

      # Push Event: Commit license files and create PR
      - name: Commit changes (Push only)
        if: github.event_name == 'push'
        run: |
          git add frontend/src/assets/3rdPartyLicenses.json
          # Note: Do NOT commit license-warnings.json - it's only for PR review
          git diff --staged --quiet || echo "CHANGES_DETECTED=true" >> $GITHUB_ENV

      - name: Prepare PR body (Push only)
        if: github.event_name == 'push'
        run: |
          PR_BODY="Auto-generated by ${{ steps.setup-bot.outputs.app-slug }}[bot]

          This PR updates the frontend license report based on changes to package.json dependencies."
          
          if [ "${{ env.LICENSE_WARNINGS_EXIST }}" = "true" ]; then
            PR_BODY="$PR_BODY

          ## ⚠️ License Compatibility Warnings

          The following licenses may require review for corporate compatibility:

          $(cat frontend/src/assets/license-warnings.json | jq -r '.warnings[].message')

          Please review these licenses to ensure they are acceptable for your use case."
          fi
          
          echo "PR_BODY<<EOF" >> $GITHUB_ENV
          echo "$PR_BODY" >> $GITHUB_ENV
          echo "EOF" >> $GITHUB_ENV

      - name: Create Pull Request (Push only)
        id: cpr
        if: github.event_name == 'push' && env.CHANGES_DETECTED == 'true'
        uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8
        with:
          token: ${{ steps.setup-bot.outputs.token }}
          commit-message: "Update Frontend 3rd Party Licenses"
          committer: ${{ steps.setup-bot.outputs.committer }}
          author: ${{ steps.setup-bot.outputs.committer }}
          signoff: true
          branch: update-frontend-3rd-party-licenses
          base: V2
          title: "Update Frontend 3rd Party Licenses"
          body: ${{ env.PR_BODY }}
          labels: Licenses,github-actions,frontend
          draft: false
          delete-branch: true
          sign-commits: true

      - name: Enable Pull Request Automerge (Push only)
        if: github.event_name == 'push' && steps.cpr.outputs.pull-request-operation == 'created' && env.LICENSE_WARNINGS_EXIST == 'false'
        run: gh pr merge --squash --auto "${{ steps.cpr.outputs.pull-request-number }}"
        env:
          GH_TOKEN: ${{ steps.setup-bot.outputs.token }}

      - name: Add review required label (Push only)
        if: github.event_name == 'push' && steps.cpr.outputs.pull-request-operation == 'created' && env.LICENSE_WARNINGS_EXIST == 'true'
        run: gh pr edit "${{ steps.cpr.outputs.pull-request-number }}" --add-label "license-review-required"
        env:
          GH_TOKEN: ${{ steps.setup-bot.outputs.token }}