name: License Report Workflow

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

concurrency:
  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.ref_name || github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  files-changed:
    name: detect what files changed
    runs-on: ubuntu-latest
    timeout-minutes: 3
    outputs:
      licenses-frontend: ${{ steps.changes.outputs.licenses-frontend }}
      licenses-backend: ${{ steps.changes.outputs.licenses-backend }}
    steps:
      - name: Harden the runner (Audit all outbound calls)
        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
        with:
          egress-policy: audit

      - name: Checkout repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Check for file changes
        uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
        id: changes
        with:
          filters: .github/config/.files.yaml

  generate-frontend-license-report:
    if: needs.files-changed.outputs.licenses-frontend == 'true'
    name: Generate Frontend License Report
    needs: files-changed
    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@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
        with:
          egress-policy: audit

      - name: Checkout PR head (default)
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        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)) && github.actor != 'dependabot[bot]'
        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@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        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@395ad3262231945c25e8478fd5baf05154b1d79f # v6.1.0
        with:
          node-version: "22"
          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) && github.actor != 'dependabot[bot]'
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        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) || github.actor == 'dependabot[bot]'
        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) && github.actor != 'dependabot[bot]'
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        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@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
        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: main
          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 }}

  generate-backend-license-report:
    if: needs.files-changed.outputs.licenses-backend == 'true'
    needs: files-changed
    name: Generate Backend 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@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
        with:
          egress-policy: audit

      - name: Checkout repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        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)) && github.actor != 'dependabot[bot]'
        id: setup-bot
        uses: ./.github/actions/setup-bot
        with:
          app-id: ${{ secrets.GH_APP_ID }}
          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}

      - name: Set up JDK 21
        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
        with:
          java-version: "21"
          distribution: "temurin"

      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@f29f5a9d7b09a7c6b29859002d29d24e1674c884 # v5.0.1
        with:
          gradle-version: 8.14

      - name: Check licenses and generate report
        id: license-check
        run: |
          ./gradlew checkLicense generateLicenseReport || echo "LICENSE_CHECK_FAILED=true" >> $GITHUB_ENV
        env:
          MAVEN_USER: ${{ secrets.MAVEN_USER }}
          MAVEN_PASSWORD: ${{ secrets.MAVEN_PASSWORD }}
          MAVEN_PUBLIC_URL: ${{ secrets.MAVEN_PUBLIC_URL }}
          DISABLE_ADDITIONAL_FEATURES: false
          STIRLING_PDF_DESKTOP_UI: true

      - name: Check for license compatibility issues
        run: |
          if [ -f build/reports/dependency-license/dependencies-without-allowed-license.json ] && \
             jq '.dependenciesWithoutAllowedLicenses | length > 0' build/reports/dependency-license/dependencies-without-allowed-license.json | grep -q true; then
            echo "LICENSE_WARNINGS_EXIST=true" >> $GITHUB_ENV
          else
            echo "LICENSE_WARNINGS_EXIST=false" >> $GITHUB_ENV
          fi
        if: always()

      - name: Upload artifact on license issues
        if: env.LICENSE_WARNINGS_EXIST == 'true'
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
        with:
          name: backend-dependencies-without-allowed-license.json
          path: build/reports/dependency-license/dependencies-without-allowed-license.json

      - name: Move license file
        if: env.LICENSE_CHECK_FAILED != 'true' && env.LICENSE_WARNINGS_EXIST == 'false'
        run: |
          mkdir -p app/core/src/main/resources/static
          cp build/reports/dependency-license/index.json app/core/src/main/resources/static/3rdPartyLicenses.json

      - name: Delete previous backend license check comments
        if: (github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false) && github.actor != 'dependabot[bot]'
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          github-token: ${{ steps.setup-bot.outputs.token }}
          script: |
            const { owner, repo } = context.repo;
            const prNumber = context.issue.number;

            const { data: comments } = await github.rest.issues.listComments({
              owner,
              repo,
              issue_number: prNumber,
              per_page: 100
            });

            const backendLicenseComments = comments.filter(comment => 
              comment.body.includes('## ✅ Backend License Check Passed') ||
              comment.body.includes('## ❌ Backend License Check Failed')
            );

            for (const comment of backendLicenseComments) {
              console.log(`Deleting old backend license comment: ${comment.id}`);
              await github.rest.issues.deleteComment({
                owner,
                repo,
                comment_id: comment.id
              });
            }

      - name: Comment on PR - Backend License Check Results
        if: (github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false) && github.actor != 'dependabot[bot]'
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          github-token: ${{ steps.setup-bot.outputs.token }}
          script: |
            const hasWarnings = process.env.LICENSE_WARNINGS_EXIST === 'true';
            const fs = require('fs');
            let warningDetails = '';

            if (hasWarnings) {
              try {
                const warningsFile = 'build/reports/dependency-license/dependencies-without-allowed-license.json';
                if (fs.existsSync(warningsFile)) {
                  const data = JSON.parse(fs.readFileSync(warningsFile, 'utf8'));
                  if (data.length > 0) {
                    warningDetails = data.map(dep => `- **${dep.moduleName}@${dep.moduleVersion}** – ${dep.moduleLicenses.map(l => l.licenseName).join(', ')}`).join('\n');
                  }
                }
              } catch (e) {
                warningDetails = 'Unable to parse warning details.';
              }
            }

            let commentBody;
            if (hasWarnings) {
              commentBody = `## ❌ Backend License Check Failed

              The backend license check has detected dependencies with incompatible or unallowed licenses:

              ${warningDetails || 'See uploaded artifact for details.'}

              **Action Required:** Please review these licenses and resolve before merging.

              _This check will fail the PR until license issues are resolved._`;
            } else {
              commentBody = `## ✅ Backend License Check Passed

              All backend dependencies have valid and allowed licenses.

              The backend license report has been updated successfully.`;
            }

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

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

      - name: Commit changes (push only)
        if: github.event_name == 'push' && env.LICENSE_WARNINGS_EXIST == 'false'
        run: |
          git config user.name "${{ steps.setup-bot.outputs.committer }}"
          git config user.email "${{ steps.setup-bot.outputs.committer-email || 'bot@github.com' }}"
          git add app/core/src/main/resources/static/3rdPartyLicenses.json
          git diff --staged --quiet || echo "CHANGES_DETECTED=true" >> $GITHUB_ENV

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

          This PR updates the backend license report based on dependency changes."

          if [ "${{ env.LICENSE_WARNINGS_EXIST }}" = "true" ]; then
            PR_BODY="$PR_BODY

          ## ⚠️ License Compatibility Warnings

          Incompatible licenses detected – manual review required before merge."
          fi
          echo "PR_BODY<<EOF" >> $GITHUB_ENV
          echo "$PR_BODY" >> $GITHUB_ENV
          echo "EOF" >> $GITHUB_ENV

      - name: Create Pull Request (push only)
        if: github.event_name == 'push' && env.CHANGES_DETECTED == 'true'
        id: cpr
        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
        with:
          token: ${{ steps.setup-bot.outputs.token }}
          commit-message: "Update Backend 3rd Party Licenses"
          committer: ${{ steps.setup-bot.outputs.committer }}
          author: ${{ steps.setup-bot.outputs.committer }}
          signoff: true
          branch: update-backend-3rd-party-licenses
          base: main
          title: "Update Backend 3rd Party Licenses"
          body: ${{ env.PR_BODY }}
          labels: Licenses,github-actions,backend
          delete-branch: true
          sign-commits: true

      - name: Enable Pull Request Automerge (push only, no warnings)
        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, with warnings)
        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 }}