name: Security Check

# ========================================
# Automated Security Scanning
# ========================================
# This workflow runs on every PR and push to main
# to detect potential security issues

on:
  push:
    branches: [ main, develop ]
  pull_request:
    branches: [ main, develop ]
  # Allow manual trigger
  workflow_dispatch:

jobs:
  # ========================================
  # SECRET SCANNING
  # ========================================
  secret-scan:
    name: Scan for Secrets
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0  # Full history for better scanning

      - name: TruffleHog Secret Scan
        uses: trufflesecurity/trufflehog@main
        with:
          path: ./
          base: ${{ github.event.repository.default_branch }}
          head: HEAD
          extra_args: --debug --only-verified

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

  # ========================================
  # FILE VALIDATION
  # ========================================
  file-validation:
    name: Validate Files
    runs-on: ubuntu-latest

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

      - name: Check for .env files
        run: |
          echo "Checking for .env files..."
          if git ls-files | grep -E "^\.env$"; then
            echo "L ERROR: .env file found in repository!"
            exit 1
          fi
          echo " No .env files found"

      - name: Check for sensitive files
        run: |
          echo "Checking for sensitive files..."
          sensitive_patterns=(
            "*.key"
            "*.pem"
            "*.cert"
            "*.p12"
            "*.pfx"
            "*secret*"
            "*credential*"
          )

          found_sensitive=false
          for pattern in "${sensitive_patterns[@]}"; do
            if git ls-files | grep -i "$pattern"; then
              echo "   WARNING: Potential sensitive file found: $pattern"
              found_sensitive=true
            fi
          done

          if [ "$found_sensitive" = true ]; then
            echo "Please review files above and ensure they're not sensitive"
            exit 1
          fi
          echo " No sensitive files found"

      - name: Verify .gitignore
        run: |
          echo "Verifying .gitignore contains .env..."
          if ! grep -q "^\.env$" .gitignore; then
            echo "L ERROR: .env not found in .gitignore!"
            exit 1
          fi
          echo " .gitignore is properly configured"

  # ========================================
  # CODE QUALITY & SECURITY
  # ========================================
  code-security:
    name: Code Security Analysis
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        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

      - name: Run ESLint Security Plugin
        run: |
          npm install --save-dev eslint-plugin-security
          # Run eslint with security rules (if configured)
          # npm run lint:security || true
        continue-on-error: true

      - name: Check for hardcoded secrets in code
        run: |
          echo "Scanning TypeScript files for potential secrets..."

          # Check for potential hardcoded passwords
          if grep -r -i "password.*=.*['\"][^'\"]\{8,\}['\"]" src/ --include="*.ts" --include="*.tsx"; then
            echo "   WARNING: Potential hardcoded password found"
            echo "Please use environment variables instead"
          fi

          # Check for API keys
          if grep -r -E "api[_-]?key.*=.*['\"][^'\"]{20,}['\"]" src/ --include="*.ts" --include="*.tsx"; then
            echo "   WARNING: Potential hardcoded API key found"
            echo "Please use environment variables instead"
          fi

          echo " Code scan completed"

  # ========================================
  # DEPENDENCY SECURITY
  # ========================================
  dependency-security:
    name: Dependency Security Audit
    runs-on: ubuntu-latest

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

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

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

      - name: Check for known vulnerabilities
        uses: snyk/actions/node@master
        continue-on-error: true
        env:
          SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
        with:
          args: --severity-threshold=high

  # ========================================
  # ENVIRONMENT VALIDATION
  # ========================================
  env-validation:
    name: Environment Configuration Check
    runs-on: ubuntu-latest

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

      - name: Verify .env.example exists
        run: |
          if [ ! -f .env.example ]; then
            echo "L ERROR: .env.example not found!"
            echo "Please create .env.example with safe default values"
            exit 1
          fi
          echo " .env.example exists"

      - name: Check .env.example for secrets
        run: |
          echo "Checking .env.example for actual secrets..."

          # .env.example should NOT contain real secrets
          if grep -E "(password|key|secret|token)=.{20,}" .env.example; then
            echo "   WARNING: .env.example may contain real credentials!"
            echo "Example files should only have placeholder values"
            exit 1
          fi

          echo " .env.example contains no real secrets"

      - name: Validate environment variable usage
        run: |
          echo "Checking that environment variables are used correctly..."

          # Check AuthContext for proper env var usage
          if [ -f "src/contexts/AuthContext.tsx" ]; then
            if grep -q "import.meta.env" src/contexts/AuthContext.tsx; then
              echo " AuthContext uses environment variables"
            else
              echo "   WARNING: AuthContext may not be using environment variables"
            fi
          fi

  # ========================================
  # SUMMARY
  # ========================================
  security-summary:
    name: Security Check Summary
    needs: [secret-scan, file-validation, code-security, dependency-security, env-validation]
    runs-on: ubuntu-latest
    if: always()

    steps:
      - name: Security Summary
        run: |
          echo "======================================"
          echo "Security Check Summary"
          echo "======================================"
          echo ""
          echo "Secret Scan: ${{ needs.secret-scan.result }}"
          echo "File Validation: ${{ needs.file-validation.result }}"
          echo "Code Security: ${{ needs.code-security.result }}"
          echo "Dependency Security: ${{ needs.dependency-security.result }}"
          echo "Environment Validation: ${{ needs.env-validation.result }}"
          echo ""

          if [ "${{ needs.secret-scan.result }}" == "failure" ] || \
             [ "${{ needs.file-validation.result }}" == "failure" ]; then
            echo "L CRITICAL: Security issues detected!"
            exit 1
          fi

          echo " All critical security checks passed"