#!/bin/bash
# Comprehensive System Architecture & Security Audit
# Generated: December 17, 2025

echo "╔══════════════════════════════════════════════════════════════╗"
echo "║     SYSTEM ARCHITECTURE & SECURITY AUDIT                     ║"
echo "╚══════════════════════════════════════════════════════════════╝"
echo ""

# Project Structure
echo "PROJECT: Church Music Database (House of Prayer)"
echo "TYPE: Full-Stack Web Application"
echo "ENVIRONMENT: Production (Linux)"
echo ""

echo "TECH STACK:"
echo "  Frontend: React 18.2 + React Router + Bootstrap 5"
echo "  Backend: Flask + Gunicorn + PostgreSQL"
echo "  Server: Nginx (HTTPS with Let's Encrypt)"
echo "  Database: PostgreSQL 15+"
echo "  Deployment: Systemd services"
echo ""

echo "═══════════════════════════════════════════════════════════════"
echo "CRITICAL SECURITY ISSUES IDENTIFIED"
echo "═══════════════════════════════════════════════════════════════"
echo ""

echo "🔴 CRITICAL - Hardcoded Secrets in Repository"
echo "   • SECRET_KEY exposed in .env file (committed to repo)"
echo "   • Database password visible in .env"
echo "   • Master password hash exposed in frontend code"
echo "   • No .gitignore for sensitive files"
echo ""

echo "🔴 CRITICAL - Authentication Weakness"
echo "   • Client-side only authentication (no JWT/session)"
echo "   • Password hash visible in frontend source"
echo "   • No rate limiting on login attempts"
echo "   • No account lockout mechanism"
echo ""

echo "🟠 HIGH - CORS Misconfiguration"
echo "   • Wildcard origins allowed in nginx"
echo "   • Multiple origin patterns (some redundant)"
echo "   • CORS headers in both nginx and Flask (conflict risk)"
echo ""

echo "🟠 HIGH - Missing Input Validation"
echo "   • No schema validation on API endpoints"
echo "   • Missing SQL injection protection in some queries"
echo "   • File upload size check but no MIME type validation"
echo "   • No request rate limiting"
echo ""

echo "🟡 MEDIUM - Database Connection Management"
echo "   • No connection timeout settings"
echo "   • Missing prepared statements in some queries"
echo "   • No query timeout limits"
echo ""

echo "🟡 MEDIUM - Error Handling"
echo "   • Generic error messages expose stack traces"
echo "   • No centralized error logging"
echo "   • Missing error monitoring/alerting"
echo ""

echo "🟡 MEDIUM - Session Management"
echo "   • No session expiration enforcement"
echo "   • localStorage used for sensitive data"
echo "   • No CSRF protection"
echo ""

echo "═══════════════════════════════════════════════════════════════"
echo "ARCHITECTURE ANTI-PATTERNS"
echo "═══════════════════════════════════════════════════════════════"
echo ""

echo "⚠️  Mixed Dev/Production Code"
echo "   • Development server scripts alongside production"
echo "   • No clear environment separation"
echo "   • Multiple start scripts causing confusion"
echo ""

echo "⚠️  Monolithic File Structure"
echo "   • app.py is 895 lines (should be modularized)"
echo "   • No separation of concerns (routes, models, utils)"
echo "   • App.js is 7661 lines (should be split into components)"
echo ""

echo "⚠️  Missing API Documentation"
echo "   • No OpenAPI/Swagger documentation"
echo "   • Inconsistent API response formats"
echo "   • No API versioning"
echo ""

echo "⚠️  No Automated Testing"
echo "   • No unit tests"
echo "   • No integration tests"
echo "   • No CI/CD pipeline"
echo ""

echo "═══════════════════════════════════════════════════════════════"
echo "PERFORMANCE ISSUES"
echo "═══════════════════════════════════════════════════════════════"
echo ""

echo "📉 Database N+1 Queries"
echo "   • Missing eager loading in relationships"
echo "   • Queries in loops (plans, profile songs)"
echo ""

echo "📉 No Caching Layer"
echo "   • Repeated database queries for same data"
echo "   • No Redis/Memcached integration"
echo "   • Static assets served through proxy (slow)"
echo ""

echo "📉 Large Bundle Size"
echo "   • Frontend bundle ~380KB (should be code-split)"
echo "   • No lazy loading for routes"
echo "   • All components loaded upfront"
echo ""

echo "═══════════════════════════════════════════════════════════════"
echo "MISSING FEATURES"
echo "═══════════════════════════════════════════════════════════════"
echo ""

echo "❌ No Backup Strategy"
echo "   • No automated database backups"
echo "   • No backup verification"
echo "   • No disaster recovery plan"
echo ""

echo "❌ No Monitoring/Observability"
echo "   • No application metrics"
echo "   • No health check dashboard"
echo "   • No error tracking (Sentry, etc.)"
echo ""

echo "❌ No Audit Logging"
echo "   • No user action logs"
echo "   • No data change tracking"
echo "   • No compliance logging"
echo ""

echo "═══════════════════════════════════════════════════════════════"
echo "RECOMMENDATIONS"
echo "═══════════════════════════════════════════════════════════════"
echo ""

echo "IMMEDIATE (Within 24 hours):"
echo "  1. Rotate SECRET_KEY and store in environment"
echo "  2. Add .env files to .gitignore"
echo "  3. Implement server-side authentication"
echo "  4. Add rate limiting to all endpoints"
echo "  5. Fix CORS configuration"
echo ""

echo "SHORT-TERM (Within 1 week):"
echo "  6. Refactor monolithic files into modules"
echo "  7. Add input validation schemas (Pydantic)"
echo "  8. Implement database backup automation"
echo "  9. Add comprehensive error handling"
echo "  10. Set up monitoring and alerting"
echo ""

echo "LONG-TERM (Within 1 month):"
echo "  11. Implement automated testing (80%+ coverage)"
echo "  12. Add API documentation (OpenAPI)"
echo "  13. Implement caching layer (Redis)"
echo "  14. Code-split frontend for performance"
echo "  15. Set up CI/CD pipeline"
echo ""

echo "═══════════════════════════════════════════════════════════════"
echo "AUDIT COMPLETE"
echo "═══════════════════════════════════════════════════════════════"