import React, { useState, useEffect } from 'react';
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
import { api } from '@/lib/api';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog';
import { Button } from '@/components/ui/button';
import { Label } from '@/components/ui/label';
import { Input } from '@/components/ui/input';
import { Switch } from '@/components/ui/switch';
import { ExternalLink, Loader2 } from 'lucide-react';
import { toast } from 'sonner';
import { __ } from '@/lib/i18n';

interface ChannelConfigProps {
  open: boolean;
  onClose: () => void;
  channelId: string;
  channelLabel: string;
}

export default function ChannelConfig({ open, onClose, channelId, channelLabel }: ChannelConfigProps) {
  // Email configuration - redirect to WooCommerce
  if (channelId === 'email') {
    return (
      <Dialog open={open} onOpenChange={onClose}>
        <DialogContent>
          <DialogHeader>
            <DialogTitle>{__('Email Configuration')}</DialogTitle>
            <DialogDescription>
              {__('Email settings are managed by WooCommerce')}
            </DialogDescription>
          </DialogHeader>

          <div className="space-y-4 py-4">
            <p className="text-sm text-muted-foreground">
              {__(
                'Email notifications are powered by WooCommerce. You can configure SMTP settings, email templates, and sender information in the WooCommerce settings.'
              )}
            </p>

            <div className="bg-muted/50 rounded-lg p-4 space-y-2">
              <h4 className="font-medium text-sm">{__('Available Settings')}</h4>
              <ul className="text-sm text-muted-foreground space-y-1">
                <li>• {__('SMTP Configuration')}</li>
                <li>• {__('Email Templates')}</li>
                <li>• {__('Sender Name & Email')}</li>
                <li>• {__('Email Headers & Footers')}</li>
              </ul>
            </div>

            <Button
              className="w-full"
              onClick={() => {
                window.open(
                  `${(window as any).WNW_CONFIG?.wpAdminUrl || '/wp-admin'}/admin.php?page=wc-settings&tab=email`,
                  '_blank'
                );
                onClose();
              }}
            >
              <ExternalLink className="h-4 w-4 mr-2" />
              {__('Open WooCommerce Email Settings')}
            </Button>
          </div>
        </DialogContent>
      </Dialog>
    );
  }

  // Push notification configuration
  if (channelId === 'push') {
    const queryClient = useQueryClient();
    const [settings, setSettings] = useState({
      use_logo: true,
      use_product_images: true,
      use_gravatar: false,
      click_action: '/wp-admin/admin.php?page=woonoow#/orders',
      require_interaction: false,
      silent: false,
    });

    // Fetch push settings
    const { data: pushSettings, isLoading } = useQuery({
      queryKey: ['push-settings'],
      queryFn: () => api.get('/notifications/push/settings'),
      enabled: open,
    });

    // Update local state when data is fetched
    useEffect(() => {
      if (pushSettings) {
        setSettings(pushSettings);
      }
    }, [pushSettings]);

    // Save settings mutation
    const saveMutation = useMutation({
      mutationFn: async () => {
        return api.post('/notifications/push/settings', settings);
      },
      onSuccess: () => {
        queryClient.invalidateQueries({ queryKey: ['push-settings'] });
        toast.success(__('Push notification settings saved'));
        onClose();
      },
      onError: (error: any) => {
        toast.error(error?.message || __('Failed to save settings'));
      },
    });

    return (
      <Dialog open={open} onOpenChange={onClose}>
        <DialogContent>
          <DialogHeader>
            <DialogTitle>{__('Push Notification Configuration')}</DialogTitle>
            <DialogDescription>
              {__('Configure how push notifications appear and behave')}
            </DialogDescription>
          </DialogHeader>

          {isLoading ? (
            <div className="flex items-center justify-center py-8">
              <Loader2 className="h-6 w-6 animate-spin text-muted-foreground" />
            </div>
          ) : (
            <div className="space-y-6 py-4">
            {/* Branding */}
            <div className="space-y-3">
              <Label>{__('Notification Branding')}</Label>
              <div className="space-y-3">
                <div className="flex items-center justify-between">
                  <div className="space-y-0.5">
                    <Label htmlFor="use-logo">{__('Use Store Logo')}</Label>
                    <p className="text-xs text-muted-foreground">
                      {__('Display your store logo in push notifications')}
                    </p>
                  </div>
                  <Switch 
                    id="use-logo" 
                    checked={settings.use_logo}
                    onCheckedChange={(checked) => setSettings({...settings, use_logo: checked})}
                  />
                </div>

                <div className="flex items-center justify-between">
                  <div className="space-y-0.5">
                    <Label htmlFor="use-product-image">{__('Use Product Images')}</Label>
                    <p className="text-xs text-muted-foreground">
                      {__('Show product images in order notifications')}
                    </p>
                  </div>
                  <Switch 
                    id="use-product-image" 
                    checked={settings.use_product_images}
                    onCheckedChange={(checked) => setSettings({...settings, use_product_images: checked})}
                  />
                </div>

                <div className="flex items-center justify-between">
                  <div className="space-y-0.5">
                    <Label htmlFor="use-gravatar">{__('Use Customer Gravatar')}</Label>
                    <p className="text-xs text-muted-foreground">
                      {__('Display customer avatar when available')}
                    </p>
                  </div>
                  <Switch 
                    id="use-gravatar" 
                    checked={settings.use_gravatar}
                    onCheckedChange={(checked) => setSettings({...settings, use_gravatar: checked})}
                  />
                </div>
              </div>
            </div>

            {/* Behavior */}
            <div className="space-y-3">
              <Label>{__('Notification Behavior')}</Label>
              <div className="space-y-3">
                <div className="space-y-2">
                  <Label htmlFor="click-action">{__('Click Action URL')}</Label>
                  <Input
                    id="click-action"
                    placeholder={__('https://yourstore.com/orders')}
                    value={settings.click_action}
                    onChange={(e) => setSettings({...settings, click_action: e.target.value})}
                  />
                  <p className="text-xs text-muted-foreground">
                    {__('Where users are redirected when clicking the notification')}
                  </p>
                </div>

                <div className="flex items-center justify-between">
                  <div className="space-y-0.5">
                    <Label htmlFor="require-interaction">{__('Require Interaction')}</Label>
                    <p className="text-xs text-muted-foreground">
                      {__('Notification stays until user dismisses it')}
                    </p>
                  </div>
                  <Switch 
                    id="require-interaction" 
                    checked={settings.require_interaction}
                    onCheckedChange={(checked) => setSettings({...settings, require_interaction: checked})}
                  />
                </div>

                <div className="flex items-center justify-between">
                  <div className="space-y-0.5">
                    <Label htmlFor="silent">{__('Silent Notifications')}</Label>
                    <p className="text-xs text-muted-foreground">
                      {__('Disable notification sound')}
                    </p>
                  </div>
                  <Switch 
                    id="silent" 
                    checked={settings.silent}
                    onCheckedChange={(checked) => setSettings({...settings, silent: checked})}
                  />
                </div>
              </div>
            </div>

            <div className="bg-muted/50 rounded-lg p-4">
              <p className="text-xs text-muted-foreground">
                💡 {__('Note: These settings will be saved and applied to all push notifications. Individual templates can override the icon and image.')}
              </p>
            </div>
            </div>
          )
          }

          <div className="flex justify-end gap-2">
            <Button variant="outline" onClick={onClose} disabled={saveMutation.isPending}>
              {__('Cancel')}
            </Button>
            <Button onClick={() => saveMutation.mutate()} disabled={saveMutation.isPending || isLoading}>
              {saveMutation.isPending ? (
                <>
                  <Loader2 className="h-4 w-4 mr-2 animate-spin" />
                  {__('Saving...')}
                </>
              ) : (
                __('Save Configuration')
              )}
            </Button>
          </div>
        </DialogContent>
      </Dialog>
    );
  }

  // Generic addon channel configuration
  return (
    <Dialog open={open} onOpenChange={onClose}>
      <DialogContent>
        <DialogHeader>
          <DialogTitle>{channelLabel} {__('Configuration')}</DialogTitle>
          <DialogDescription>
            {__('Configure')} {channelLabel} {__('settings')}
          </DialogDescription>
        </DialogHeader>

        <div className="space-y-4 py-4">
          <p className="text-sm text-muted-foreground">
            {__('Configuration for this channel is provided by the addon.')}
          </p>
        </div>

        <div className="flex justify-end">
          <Button variant="outline" onClick={onClose}>
            {__('Close')}
          </Button>
        </div>
      </DialogContent>
    </Dialog>
  );
}
