import { useState, useEffect } from 'react';
import { X, Wifi, Lock, Signal } from 'lucide-react';
import { motion, AnimatePresence } from 'motion/react';
import { toast } from 'sonner';

interface WiFiNetwork {
  ssid: string;
  signal: number;
  secured: boolean;
}

interface WiFiScanOverlayProps {
  onClose: () => void;
  onNetworkAdded: (ssid: string, passphrase: string) => void;
  existingNetworks: string[];
}

export default function WiFiScanOverlay({ onClose, onNetworkAdded, existingNetworks }: WiFiScanOverlayProps) {
  const [isScanning, setIsScanning] = useState(true);
  const [networks, setNetworks] = useState<WiFiNetwork[]>([]);
  const [selectedNetwork, setSelectedNetwork] = useState<WiFiNetwork | null>(null);
  const [password, setPassword] = useState('');
  const [isConnecting, setIsConnecting] = useState(false);

  useEffect(() => {
    // Simulate network scan
    const scanNetworks = async () => {
      await new Promise(resolve => setTimeout(resolve, 2000));

      const mockNetworks: WiFiNetwork[] = [
        { ssid: 'HomeNetwork-5G', signal: 95, secured: true },
        { ssid: 'CoffeeShop_WiFi', signal: 88, secured: false },
        { ssid: 'Neighbor-WiFi', signal: 72, secured: true },
        { ssid: 'Office-Guest', signal: 65, secured: false },
        { ssid: 'Mobile_Hotspot', signal: 58, secured: true },
        { ssid: 'Library_Public', signal: 45, secured: false },
        { ssid: 'Hidden-Network', signal: 30, secured: true }
      ].filter(net => !existingNetworks.includes(net.ssid));

      setNetworks(mockNetworks);
      setIsScanning(false);
    };

    scanNetworks();
  }, [existingNetworks]);

  const handleConnect = async () => {
    if (!selectedNetwork) return;

    if (selectedNetwork.secured && !password) {
      toast.error('Password required for secured network');
      return;
    }

    setIsConnecting(true);
    toast.loading('Connecting to network...');

    // Simulate connection
    await new Promise(resolve => setTimeout(resolve, 1500));

    toast.dismiss();
    toast.success(`Connected to ${selectedNetwork.ssid}`);
    onNetworkAdded(selectedNetwork.ssid, password);
    onClose();
  };

  const getSignalIcon = (signal: number) => {
    if (signal > 80) return 'text-green-600';
    if (signal > 60) return 'text-yellow-600';
    return 'text-red-600';
  };

  const getSignalBars = (signal: number) => {
    const bars = Math.ceil(signal / 25);
    return (
      <div className="flex items-end gap-0.5 h-4">
        {[1, 2, 3, 4].map((bar) => (
          <div
            key={bar}
            className={`w-1 ${bar <= bars ? 'bg-current' : 'bg-neutral-300'}`}
            style={{ height: `${bar * 25}%` }}
          />
        ))}
      </div>
    );
  };

  return (
    <AnimatePresence>
      <motion.div
        initial={{ opacity: 0 }}
        animate={{ opacity: 1 }}
        exit={{ opacity: 0 }}
        className="fixed inset-0 bg-black/50 z-50"
        onClick={onClose}
      >
        <motion.div
          initial={{ y: '100%' }}
          animate={{ y: 0 }}
          exit={{ y: '100%' }}
          transition={{ type: 'spring', damping: 30, stiffness: 300 }}
          className="absolute inset-0 bg-white overflow-y-auto"
          onClick={(e) => e.stopPropagation()}
        >
          <div className="sticky top-0 bg-white border-b border-neutral-200 z-10">
            <div className="flex items-center justify-between p-4">
              <button onClick={onClose} className="p-2 -m-2">
                <X className="w-6 h-6" />
              </button>
              <h2>WiFi Networks</h2>
              <div className="w-10" />
            </div>
          </div>

          {isScanning ? (
            <div className="flex flex-col items-center justify-center py-20">
              <div className="relative w-16 h-16 mb-4">
                <motion.div
                  animate={{ scale: [1, 1.2, 1], opacity: [0.5, 1, 0.5] }}
                  transition={{ duration: 1.5, repeat: Infinity }}
                  className="absolute inset-0 bg-blue-500 rounded-full"
                />
                <div className="absolute inset-0 flex items-center justify-center">
                  <Wifi className="w-8 h-8 text-white z-10" />
                </div>
              </div>
              <div className="text-neutral-600">Scanning for networks...</div>
              <div className="text-sm text-neutral-500 mt-1">Please wait</div>
            </div>
          ) : selectedNetwork ? (
            <div className="p-4">
              <div className="bg-white border border-neutral-200 rounded-lg p-4 mb-4">
                <div className="flex items-center gap-3 mb-4">
                  <div className={`${getSignalIcon(selectedNetwork.signal)}`}>
                    {getSignalBars(selectedNetwork.signal)}
                  </div>
                  <div className="flex-1">
                    <div className="font-medium">{selectedNetwork.ssid}</div>
                    <div className="text-sm text-neutral-500">
                      Signal: {selectedNetwork.signal}%
                    </div>
                  </div>
                  {selectedNetwork.secured && (
                    <Lock className="w-5 h-5 text-neutral-400" />
                  )}
                </div>

                {selectedNetwork.secured && (
                  <div>
                    <label className="text-sm text-neutral-500 block mb-2">Password</label>
                    <input
                      type="password"
                      value={password}
                      onChange={(e) => setPassword(e.target.value)}
                      placeholder="Enter network password"
                      className="w-full px-3 py-2 border border-neutral-300 rounded-lg"
                      autoFocus
                    />
                  </div>
                )}
              </div>

              <div className="flex gap-2">
                <button
                  onClick={() => {
                    setSelectedNetwork(null);
                    setPassword('');
                  }}
                  className="flex-1 py-2 px-4 border border-neutral-300 text-neutral-700 rounded-lg"
                >
                  Back
                </button>
                <button
                  onClick={handleConnect}
                  disabled={isConnecting}
                  className="flex-1 py-2 px-4 bg-blue-600 text-white rounded-lg disabled:opacity-50"
                >
                  {isConnecting ? 'Connecting...' : 'Connect'}
                </button>
              </div>
            </div>
          ) : (
            <div className="p-4">
              <div className="text-sm text-neutral-500 mb-3">
                {networks.length} network{networks.length !== 1 ? 's' : ''} found
              </div>

              <div className="space-y-2">
                {networks.map((network, index) => (
                  <button
                    key={index}
                    onClick={() => setSelectedNetwork(network)}
                    className="w-full bg-white border border-neutral-200 rounded-lg p-4 flex items-center gap-3 hover:bg-neutral-50"
                  >
                    <div className={getSignalIcon(network.signal)}>
                      {getSignalBars(network.signal)}
                    </div>
                    <div className="flex-1 text-left">
                      <div className="font-medium">{network.ssid}</div>
                      <div className="text-sm text-neutral-500">
                        Signal: {network.signal}%
                      </div>
                    </div>
                    {network.secured && (
                      <Lock className="w-5 h-5 text-neutral-400" />
                    )}
                  </button>
                ))}
              </div>

              {networks.length === 0 && (
                <div className="text-center py-8 text-neutral-500">
                  No new networks found
                </div>
              )}
            </div>
          )}
        </motion.div>
      </motion.div>
    </AnimatePresence>
  );
}