name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  commitlint:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "24"
          cache: "npm"

      - name: Install dependencies
        run: npm ci --prefer-offline --no-audit --no-fund

      - name: Validate current commit
        if: github.event_name == 'push'
        run: npx commitlint --from HEAD~1 --to HEAD --verbose

      - name: Validate PR commits
        if: github.event_name == 'pull_request'
        run: npx commitlint --from ${{ github.event.pull_request.base.sha }} --to ${{ github.event.pull_request.head.sha }} --verbose

  frontend:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        node-version: [latest, 24.*, 25.*, 26.*]

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

      - name: Setup Node.js ${{ matrix.node-version }}
        uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}
          cache: "npm"

      - name: Install dependencies
        run: npm ci --prefer-offline --no-audit --no-fund

      - name: Lint
        run: npm run lint

      - name: Unit Tests
        run: npm run test:run

      - name: Build
        run: npm run build

      - name: Upload build artifacts
        uses: actions/upload-artifact@v4
        with:
          name: dist-${{ matrix.node-version }}
          path: dist/
          retention-days: 7

  backend:
    runs-on: ubuntu-latest

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

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

      - name: Install dependencies
        working-directory: ./backend
        run: npm ci --prefer-offline --no-audit --no-fund

      - name: Test
        working-directory: ./backend
        run: npm test

  integration:
    runs-on: ubuntu-latest
    needs: [frontend, backend, commitlint]

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

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20.x"
          cache: "npm"

      - name: Install dependencies
        run: npm ci --prefer-offline --no-audit --no-fund

      - name: Run Integration Tests
        run: npm run test:integration

  e2e:
    runs-on: ubuntu-latest
    needs: [frontend, backend, commitlint]

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

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20.x"
          cache: "npm"

      - name: Install dependencies
        run: npm ci --prefer-offline --no-audit --no-fund

      - name: Install Playwright browsers
        run: npx playwright install --with-deps chromium

      - name: Run E2E Tests
        run: npm run test:e2e

      - name: Upload Playwright report
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: playwright-report
          path: playwright-report/
          retention-days: 7

  regression:
    runs-on: ubuntu-latest
    needs: [frontend, backend, commitlint]

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

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20.x"
          cache: "npm"

      - name: Install dependencies
        run: npm ci --prefer-offline --no-audit --no-fund

      - name: Run Regression Tests
        run: npm run test:regression

      - name: Upload snapshot diffs
        uses: actions/upload-artifact@v4
        if: failure()
        with:
          name: snapshot-diffs
          path: tests/regression/**/__diff_output__/
          retention-days: 7

  lighthouse:
    runs-on: ubuntu-latest
    needs: [frontend]

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

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20.x"
          cache: "npm"

      - name: Install dependencies
        run: npm ci --prefer-offline --no-audit --no-fund

      - name: Build
        run: npm run build

      - name: Run Lighthouse CI
        run: npm run test:lighthouse
        continue-on-error: true

  quality:
    name: Quality Gates
    runs-on: ubuntu-latest

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

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

      - name: Install dependencies
        run: npm ci --prefer-offline --no-audit --no-fund

      - name: Run tests with coverage
        run: npm run test:coverage

      - name: Upload coverage to Codecov
        uses: codecov/codecov-action@v4
        with:
          token: ${{ secrets.CODECOV_TOKEN }}
          fail_ci_if_error: false

      - name: Build
        run: npm run build

      - name: Check bundle size
        run: npx bundlesize

      - name: Security audit
        run: npm audit --audit-level=moderate
        continue-on-error: true