import { useEffect, useState } from 'react';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from '@/components/ui/table';
import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogTrigger } from '@/components/ui/dialog';
import { Label } from '@/components/ui/label';
import { Textarea } from '@/components/ui/textarea';
import { campaignsAPI } from '@/lib/api';
import { toast } from 'sonner';
import { Plus, Send, Trash2 } from 'lucide-react';
import DashboardLayout from '@/components/DashboardLayout';

interface Campaign {
  CampaignID: number;
  CampaignName: string;
  Subject: string;
  Status: string;
  CreatedDate: string;
  SentDate?: string;
}

export default function Campaigns() {
  const [campaigns, setCampaigns] = useState<Campaign[]>([]);
  const [loading, setLoading] = useState(true);
  const [open, setOpen] = useState(false);
  const [formData, setFormData] = useState({
    campaignName: '',
    subject: '',
    body: '',
  });

  useEffect(() => {
    fetchCampaigns();
  }, []);

  const fetchCampaigns = async () => {
    try {
      setLoading(true);
      const response = await campaignsAPI.getAll();
      setCampaigns(response.data);
    } catch (error) {
      toast.error('Грешка при зареждане на кампаниите');
    } finally {
      setLoading(false);
    }
  };

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();

    try {
      await campaignsAPI.create(formData);
      toast.success('Кампанията е създадена');
      setOpen(false);
      setFormData({
        campaignName: '',
        subject: '',
        body: '',
      });
      fetchCampaigns();
    } catch (error: any) {
      toast.error(error.response?.data?.error || 'Грешка при запазване');
    }
  };

  const handleSend = async (id: number) => {
    if (confirm('Сигурни ли сте, че искате да изпратите тази кампания?')) {
      try {
        await campaignsAPI.send(id);
        toast.success('Кампанията е изпратена');
        fetchCampaigns();
      } catch (error) {
        toast.error('Грешка при изпращане');
      }
    }
  };

  const handleDelete = async (id: number) => {
    if (confirm('Сигурни ли сте, че искате да изтриете тази кампания?')) {
      try {
        await campaignsAPI.delete(id);
        toast.success('Кампанията е изтрита');
        fetchCampaigns();
      } catch (error) {
        toast.error('Грешка при изтриване');
      }
    }
  };

  return (
    <DashboardLayout>
      <div className="space-y-6">
        <div className="flex justify-between items-center">
          <h1 className="text-3xl font-bold">Имейл кампании</h1>
          <Dialog open={open} onOpenChange={setOpen}>
            <DialogTrigger asChild>
              <Button>
                <Plus className="w-4 h-4 mr-2" />
                Нова кампания
              </Button>
            </DialogTrigger>
            <DialogContent className="max-w-2xl">
              <DialogHeader>
                <DialogTitle>Нова имейл кампания</DialogTitle>
              </DialogHeader>
              <form onSubmit={handleSubmit} className="space-y-4">
                <div className="space-y-2">
                  <Label>Име на кампания *</Label>
                  <Input
                    required
                    value={formData.campaignName}
                    onChange={(e) => setFormData({ ...formData, campaignName: e.target.value })}
                  />
                </div>
                <div className="space-y-2">
                  <Label>Тема *</Label>
                  <Input
                    required
                    value={formData.subject}
                    onChange={(e) => setFormData({ ...formData, subject: e.target.value })}
                  />
                </div>
                <div className="space-y-2">
                  <Label>Съдържание *</Label>
                  <Textarea
                    required
                    rows={8}
                    value={formData.body}
                    onChange={(e) => setFormData({ ...formData, body: e.target.value })}
                  />
                </div>
                <Button type="submit" className="w-full">
                  Създай кампания
                </Button>
              </form>
            </DialogContent>
          </Dialog>
        </div>

        <Card>
          <CardHeader>
            <CardTitle>Всички кампании</CardTitle>
          </CardHeader>
          <CardContent>
            {loading ? (
              <div className="text-center py-8">Зареждане...</div>
            ) : campaigns.length === 0 ? (
              <div className="text-center py-8 text-muted-foreground">Няма кампании</div>
            ) : (
              <div className="overflow-x-auto">
                <Table>
                  <TableHeader>
                    <TableRow>
                      <TableHead>Име</TableHead>
                      <TableHead>Тема</TableHead>
                      <TableHead>Статус</TableHead>
                      <TableHead>Създадена</TableHead>
                      <TableHead>Действия</TableHead>
                    </TableRow>
                  </TableHeader>
                  <TableBody>
                    {campaigns.map((campaign) => (
                      <TableRow key={campaign.CampaignID}>
                        <TableCell className="font-medium">{campaign.CampaignName}</TableCell>
                        <TableCell>{campaign.Subject}</TableCell>
                        <TableCell>
                          <span className={`px-2 py-1 rounded-full text-xs font-medium ${
                            campaign.Status === 'Sent' ? 'bg-green-100 text-green-800' :
                            campaign.Status === 'Draft' ? 'bg-gray-100 text-gray-800' :
                            'bg-blue-100 text-blue-800'
                          }`}>
                            {campaign.Status}
                          </span>
                        </TableCell>
                        <TableCell>{new Date(campaign.CreatedDate).toLocaleDateString('bg-BG')}</TableCell>
                        <TableCell className="space-x-2">
                          {campaign.Status === 'Draft' && (
                            <Button
                              variant="ghost"
                              size="sm"
                              onClick={() => handleSend(campaign.CampaignID)}
                            >
                              <Send className="w-4 h-4" />
                            </Button>
                          )}
                          <Button
                            variant="ghost"
                            size="sm"
                            onClick={() => handleDelete(campaign.CampaignID)}
                          >
                            <Trash2 className="w-4 h-4 text-destructive" />
                          </Button>
                        </TableCell>
                      </TableRow>
                    ))}
                  </TableBody>
                </Table>
              </div>
            )}
          </CardContent>
        </Card>
      </div>
    </DashboardLayout>
  );
}