name: Build ClojureScript Runtime

on:
  push:
    branches:
      - master
    paths:
      - 'src/**/*.cljs'
      - 'shadow-cljs.edn'
      - 'deps.edn'
      - '.github/workflows/build-clojurescript.yml'
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup Java
        uses: actions/setup-java@v4
        with:
          distribution: 'temurin'
          java-version: '21'

      - name: Install Clojure CLI
        uses: DeLaGuardo/setup-clojure@12.1
        with:
          cli: '1.11.1.1435'
          bb: 'latest'

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'

      - name: Cache Maven dependencies
        uses: actions/cache@v4
        with:
          path: ~/.m2/repository
          key: ${{ runner.os }}-maven-${{ hashFiles('**/deps.edn') }}
          restore-keys: |
            ${{ runner.os }}-maven-

      - name: Install npm dependencies
        run: npm ci

      - name: Compile ClojureScript browser bundle
        run: |
          echo "[ClojureScript Build] Starting compilation..."
          npx shadow-cljs release browser 2>&1 | tee cljs-build.log
          BUILD_EXIT=$?
          echo "Build exit code: $BUILD_EXIT"

          if [ $BUILD_EXIT -eq 0 ]; then
            echo "[ClojureScript Build] ✓ Success"
            ls -lh docs/js/
          else
            echo "[ClojureScript Build] ✗ Failed"
            cat cljs-build.log
            exit $BUILD_EXIT
          fi

      - name: Generate build report
        if: always()
        run: |
          cat > docs/BUILD_REPORT.md <<'EOF'
          # ClojureScript Build Report

          **Build Date**: $(date -u +"%Y-%m-%dT%H:%M:%SZ")
          **Git Commit**: $(git rev-parse --short HEAD)
          **Java Version**: $(java -version 2>&1 | head -1)
          **Clojure CLI**: $(clojure --version)
          **Node.js**: $(node --version)
          **shadow-cljs**: $(npx shadow-cljs --version)

          ## Build Output

          EOF
          cat cljs-build.log >> docs/BUILD_REPORT.md

      - name: Commit build artifacts
        if: success()
        run: |
          git config user.name "GitHub Actions"
          git config user.email "actions@github.com"
          git add docs/js/main.js* docs/BUILD_REPORT.md
          git commit -m "build: ClojureScript browser bundle compiled" || echo "No changes to commit"
          git push origin master

      - name: Report failure
        if: failure()
        run: |
          echo "❌ ClojureScript compilation failed. See cljs-build.log above."
          exit 1