'use client';

import { useState } from 'react';
import { NotificationManager, type NotificationRequest, WebPushManager } from '../utils/notifications';

interface LocationData {
  name: string;
  lat: number;
  lng: number;
  available: boolean;
  passType: string;
}

interface NotificationPanelProps {
  locations: LocationData[];
}

export default function NotificationPanel({ locations }: { readonly locations: LocationData[] }) {
  const [notifications, setNotifications] = useState<NotificationRequest[]>(() => 
    NotificationManager.getNotifications()
  );
  const [showAddForm, setShowAddForm] = useState(false);
  const [selectedLibrary, setSelectedLibrary] = useState('');
  const [selectedPassTypes, setSelectedPassTypes] = useState<string[]>([]);
  const [notificationPermission, setNotificationPermission] = useState<NotificationPermission>(
    WebPushManager.isSupported() ? WebPushManager.getPermissionStatus() : 'denied'
  );

  const handlePassTypeChange = (type: string, checked: boolean) => {
    if (checked) {
      setSelectedPassTypes(prev => [...prev, type]);
    } else {
      setSelectedPassTypes(prev => prev.filter(t => t !== type));
    }
  };

  const requestNotificationPermission = async () => {
    const granted = await WebPushManager.requestPermission();
    setNotificationPermission(granted ? 'granted' : 'denied');
  };

  const handleAddNotification = () => {
    if (!selectedLibrary || selectedPassTypes.length === 0) return;

    const newNotification = NotificationManager.addNotification({
      libraryName: selectedLibrary,
      passTypes: selectedPassTypes as ('Pass Only' | 'Backpack Only' | 'Both')[],
    });

    setNotifications(prev => [...prev, newNotification]);
    setShowAddForm(false);
    setSelectedLibrary('');
    setSelectedPassTypes([]);
  };

  const handleRemoveNotification = (id: string) => {
    NotificationManager.removeNotification(id);
    setNotifications(prev => prev.filter(n => n.id !== id));
  };

  const checkNotifications = async () => {
    const availableNow = notifications.filter(notification => {
      const library = locations.find(loc => loc.name === notification.libraryName);
      return library && library.available && (
        notification.passTypes.includes('Both') ||
        notification.passTypes.some(type => library.passType.includes(type.replace(' Only', '')))
      );
    });

    if (availableNow.length > 0) {
      const message = availableNow.map(n => `${n.libraryName} has passes available!`).join('\n');
      
      // Try web notification first
      if (notificationPermission === 'granted') {
        for (const notification of availableNow) {
          await WebPushManager.showNotification(
            '🎉 Beach Pass Available!',
            `${notification.libraryName} has ${notification.passTypes.join(' and ')} available!`,
            {
              tag: `park-pass-${notification.id}`,
              requireInteraction: true,
            }
          );
        }
      }
      
      // Also show alert for immediate feedback
      alert(`🎉 Great news!\n\n${message}`);
      
      // Update last checked for all notifications
      notifications.forEach(n => NotificationManager.updateLastChecked(n.id));
    } else {
      alert('No passes currently available for your requested libraries.');
    }
  };

  return (
    <div style={{ marginTop: '15px', borderTop: '1px solid #eee', paddingTop: '15px' }}>
      <h4 style={{ marginBottom: '10px', display: 'flex', alignItems: 'center', justifyContent: 'space-between' }}>
        <span>🔔 Notifications ({notifications.length})</span>
        <button
          onClick={() => setShowAddForm(!showAddForm)}
          style={{
            fontSize: '12px',
            padding: '4px 8px',
            backgroundColor: '#4CAF50',
            color: 'white',
            border: 'none',
            borderRadius: '4px',
            cursor: 'pointer',
          }}
        >
          {showAddForm ? 'Cancel' : '+ Add'}
        </button>
      </h4>

      {/* Notification Permission Status */}
      {WebPushManager.isSupported() && (
        <div style={{ 
          marginBottom: '10px', 
          padding: '8px', 
          backgroundColor: notificationPermission === 'granted' ? '#e8f5e8' : '#fff3cd',
          borderRadius: '4px',
          fontSize: '12px',
          border: `1px solid ${notificationPermission === 'granted' ? '#4CAF50' : '#ffc107'}`
        }}>
          <div style={{ fontWeight: 'bold', marginBottom: '4px' }}>
            Push Notifications: {notificationPermission === 'granted' ? '✅ Enabled' : '❌ Disabled'}
          </div>
          {notificationPermission !== 'granted' && (
            <div>
              <div style={{ marginBottom: '6px', color: '#666' }}>
                Enable push notifications to get alerts when passes become available.
              </div>
              <button
                onClick={requestNotificationPermission}
                style={{
                  fontSize: '11px',
                  padding: '4px 8px',
                  backgroundColor: '#007cba',
                  color: 'white',
                  border: 'none',
                  borderRadius: '3px',
                  cursor: 'pointer',
                }}
              >
                Enable Notifications
              </button>
            </div>
          )}
        </div>
      )}

      {showAddForm && (
        <div style={{ 
          backgroundColor: '#f9f9f9', 
          padding: '10px', 
          borderRadius: '4px', 
          marginBottom: '10px',
          fontSize: '13px' 
        }}>
          <div style={{ marginBottom: '8px' }}>
            <div style={{ display: 'block', marginBottom: '4px', fontWeight: 'bold' }}>
              Library:
            </div>
            <select
              value={selectedLibrary}
              onChange={(e) => setSelectedLibrary(e.target.value)}
              style={{ width: '100%', padding: '4px', fontSize: '12px' }}
              aria-label="Select library"
            >
              <option value="">Select a library...</option>
              {locations.map(loc => (
                <option key={loc.name} value={loc.name}>{loc.name}</option>
              ))}
            </select>
          </div>

          <div style={{ marginBottom: '8px' }}>
            <div style={{ display: 'block', marginBottom: '4px', fontWeight: 'bold' }}>
              Pass Types:
            </div>
            {['Pass Only', 'Backpack Only', 'Both'].map(type => (
              <div key={type} style={{ display: 'block', fontSize: '12px' }}>
                <input
                  type="checkbox"
                  checked={selectedPassTypes.includes(type)}
                  onChange={(e) => handlePassTypeChange(type, e.target.checked)}
                  style={{ marginRight: '6px' }}
                  id={`passtype-${type}`}
                />
                <label htmlFor={`passtype-${type}`}>
                  {type}
                </label>
              </div>
            ))}
          </div>

          <button
            onClick={handleAddNotification}
            disabled={!selectedLibrary || selectedPassTypes.length === 0}
            style={{
              padding: '6px 12px',
              backgroundColor: selectedLibrary && selectedPassTypes.length > 0 ? '#007cba' : '#ccc',
              color: 'white',
              border: 'none',
              borderRadius: '4px',
              cursor: selectedLibrary && selectedPassTypes.length > 0 ? 'pointer' : 'not-allowed',
              fontSize: '12px',
            }}
          >
            Add Notification
          </button>
        </div>
      )}

      {notifications.length > 0 && (
        <>
          <div style={{ maxHeight: '120px', overflowY: 'auto', marginBottom: '8px' }}>
            {notifications.map(notification => (
              <div key={notification.id} style={{ 
                fontSize: '11px', 
                marginBottom: '6px', 
                padding: '6px',
                backgroundColor: '#f0f0f0',
                borderRadius: '3px',
                display: 'flex',
                justifyContent: 'space-between',
                alignItems: 'center'
              }}>
                <div>
                  <div style={{ fontWeight: 'bold' }}>{notification.libraryName}</div>
                  <div style={{ color: '#666' }}>
                    {notification.passTypes.join(', ')}
                  </div>
                </div>
                <button
                  onClick={() => handleRemoveNotification(notification.id)}
                  style={{
                    backgroundColor: '#f44336',
                    color: 'white',
                    border: 'none',
                    borderRadius: '2px',
                    padding: '2px 6px',
                    fontSize: '10px',
                    cursor: 'pointer',
                  }}
                >
                  ✕
                </button>
              </div>
            ))}
          </div>
          
          <button
            onClick={checkNotifications}
            style={{
              width: '100%',
              padding: '8px',
              backgroundColor: '#ff9800',
              color: 'white',
              border: 'none',
              borderRadius: '4px',
              cursor: 'pointer',
              fontSize: '12px',
              fontWeight: 'bold',
            }}
          >
            Check Now
          </button>
        </>
      )}
    </div>
  );
}