name: PR Checks

on:
  pull_request:
    types: [opened, synchronize, reopened, edited]
    branches:
      - dev
      - main

jobs:
  # Validate PR title and description
  validate-pr:
    name: Validate PR Format
    runs-on: ubuntu-latest
    steps:
      - name: Check PR title format
        uses: amannn/action-semantic-pull-request@v5
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          types: |
            feat
            fix
            docs
            style
            refactor
            perf
            test
            chore
            ci
            security
          scopes: |
            exchange
            trader
            ai
            api
            ui
            frontend
            backend
            security
            deps
          requireScope: false

      - name: Check PR size
        uses: actions/github-script@v7
        with:
          script: |
            const pr = context.payload.pull_request;
            const additions = pr.additions;
            const deletions = pr.deletions;
            const total = additions + deletions;

            let label = '';
            let comment = '';

            if (total < 300) {
              label = 'size: small';
              comment = '✅ This PR is **small** and easy to review!';
            } else if (total < 1000) {
              label = 'size: medium';
              comment = '⚠️ This PR is **medium** sized. Consider breaking it into smaller PRs if possible.';
            } else {
              label = 'size: large';
              comment = '🚨 This PR is **large** (>' + total + ' lines changed). Please consider breaking it into smaller, focused PRs for easier review.';
            }

            // Add size label
            await github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: pr.number,
              labels: [label]
            });

            // Add comment for large PRs
            if (total >= 1000) {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: pr.number,
                body: comment
              });
            }

  # Backend tests
  backend-tests:
    name: Backend Tests (Go)
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.21'

      - name: Install TA-Lib
        run: |
          sudo apt-get update
          sudo apt-get install -y libta-lib-dev

      - name: Cache Go modules
        uses: actions/cache@v4
        with:
          path: ~/go/pkg/mod
          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
          restore-keys: |
            ${{ runner.os }}-go-

      - name: Download dependencies
        run: go mod download

      - name: Run go fmt
        run: |
          if [ "$(gofmt -s -l . | wc -l)" -gt 0 ]; then
            echo "Please run 'go fmt' on your code"
            gofmt -s -l .
            exit 1
          fi

      - name: Run go vet
        run: go vet ./...

      - name: Run tests
        run: go test -v -race -coverprofile=coverage.out ./...

      - name: Build
        run: go build -v -o nofx

      - name: Upload coverage
        uses: codecov/codecov-action@v4
        with:
          file: ./coverage.out
          flags: backend

  # Frontend tests
  frontend-tests:
    name: Frontend Tests (React/TypeScript)
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '18'

      - name: Cache Node modules
        uses: actions/cache@v4
        with:
          path: web/node_modules
          key: ${{ runner.os }}-node-${{ hashFiles('web/package-lock.json') }}
          restore-keys: |
            ${{ runner.os }}-node-

      - name: Install dependencies
        working-directory: ./web
        run: npm ci

      - name: Run linter
        working-directory: ./web
        run: npm run lint

      - name: Run type check
        working-directory: ./web
        run: npm run type-check || true  # Don't fail on type errors for now

      - name: Build
        working-directory: ./web
        run: npm run build

  # Auto-label based on files changed
  auto-label:
    name: Auto Label PR
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - uses: actions/labeler@v5
        with:
          configuration-path: .github/labeler.yml
          repo-token: ${{ secrets.GITHUB_TOKEN }}

  # Check for security issues
  security-check:
    name: Security Scan
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@master
        with:
          scan-type: 'fs'
          scan-ref: '.'
          format: 'sarif'
          output: 'trivy-results.sarif'

      - name: Upload Trivy results
        uses: github/codeql-action/upload-sarif@v3
        if: always()
        with:
          sarif_file: 'trivy-results.sarif'

  # Check for secrets in code
  secrets-check:
    name: Check for Secrets
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Run Gitleaks
        uses: gitleaks/gitleaks-action@v2
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  # All checks passed
  all-checks:
    name: All Checks Passed
    runs-on: ubuntu-latest
    needs: [validate-pr, backend-tests, frontend-tests, security-check, secrets-check]
    if: always()
    steps:
      - name: Check all jobs
        run: |
          if [ "${{ contains(needs.*.result, 'failure') }}" == "true" ]; then
            echo "Some checks failed"
            exit 1
          else
            echo "All checks passed!"
          fi