#!/bin/bash

# Drone Detection System - Troubleshooting Script
# This script helps diagnose common issues with the drone detection system

echo "🔧 Drone Detection System - Troubleshooting"
echo "============================================"

# Check Docker status
echo ""
echo "📋 Checking Docker containers..."
if command -v docker &> /dev/null; then
    docker ps --format "table {{.Names}}\t{{.Status}}\t{{.Ports}}"
    echo ""
    
    # Check specific containers
    echo "🔍 Checking drone detection containers..."
    if docker ps | grep -q "drone-detection"; then
        echo "✅ Drone detection containers are running"
    else
        echo "❌ Drone detection containers not found. Run: docker-compose up -d"
    fi
else
    echo "❌ Docker is not installed or not running"
fi

# Check port availability
echo ""
echo "🌐 Checking port availability..."
ports=(3001 3002 5433 6380)
for port in "${ports[@]}"; do
    if ss -tulpn | grep -q ":$port "; then
        echo "✅ Port $port is in use"
    else
        echo "⚠️  Port $port is not in use"
    fi
done

# Check Nginx status
echo ""
echo "🌍 Checking Nginx status..."
if command -v nginx &> /dev/null; then
    if systemctl is-active --quiet nginx; then
        echo "✅ Nginx is running"
    else
        echo "❌ Nginx is not running. Start with: sudo systemctl start nginx"
    fi
    
    # Check nginx configuration
    if nginx -t &>/dev/null; then
        echo "✅ Nginx configuration is valid"
    else
        echo "❌ Nginx configuration has errors. Check with: sudo nginx -t"
    fi
else
    echo "❌ Nginx is not installed"
fi

# Check site configuration
echo ""
echo "📄 Checking site configuration..."
if [ -f "/etc/nginx/sites-enabled/drones.cqers.com" ]; then
    echo "✅ Drone detection nginx config is enabled"
else
    echo "❌ Drone detection nginx config not found"
    echo "   Run the setup script: sudo ./scripts/setup-nginx.sh"
fi

# Test endpoints
echo ""
echo "🔗 Testing endpoints..."
endpoints=(
    "http://localhost:3001"
    "http://localhost:3002/health"
    "http://localhost/health"
)

for endpoint in "${endpoints[@]}"; do
    if curl -s -f "$endpoint" >/dev/null; then
        echo "✅ $endpoint is responding"
    else
        echo "❌ $endpoint is not responding"
    fi
done

# Check logs
echo ""
echo "📊 Recent Docker logs (last 10 lines)..."
if command -v docker &> /dev/null; then
    echo "--- Backend logs ---"
    docker logs --tail 10 drone-detection-backend 2>/dev/null || echo "No backend container logs"
    echo ""
    echo "--- Frontend logs ---"
    docker logs --tail 10 drone-detection-frontend 2>/dev/null || echo "No frontend container logs"
fi

echo ""
echo "🏁 Troubleshooting complete!"
echo ""
echo "Common solutions:"
echo "1. Restart containers: docker-compose restart"
echo "2. Rebuild containers: docker-compose up -d --build"
echo "3. Check logs: docker-compose logs -f"
echo "4. Reload nginx: sudo systemctl reload nginx"