'use client';

import { useState } from 'react';
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
import { api } from '@/lib/api';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { useToast } from '@/hooks/use-toast';
import { formatPhone, formatDate } from '@/lib/utils';
import {
  Plus,
  Search,
  Phone,
  Mail,
  Dog,
  Edit,
  Eye,
  Users,
  MapPin,
  Calendar,
  X,
  PawPrint,
  ArrowRight,
} from 'lucide-react';
import Link from 'next/link';

export default function TutoresPage() {
  const [search, setSearch] = useState('');
  const [showForm, setShowForm] = useState(false);
  const [formData, setFormData] = useState({
    name: '',
    phone: '',
    email: '',
    cpf: '',
    address: '',
    city: '',
    state: '',
    zipCode: '',
  });

  const { toast } = useToast();
  const queryClient = useQueryClient();

  const { data: tutorsResponse, isLoading } = useQuery({
    queryKey: ['tutors', search],
    queryFn: async () => {
      const response = await api.get('/tutors', { params: { search } });
      return response.data;
    },
  });

  const tutors = tutorsResponse?.data || [];
  const totalTutors = tutorsResponse?.pagination?.total || tutors.length;

  const createMutation = useMutation({
    mutationFn: async (data: typeof formData) => {
      const response = await api.post('/tutors', data);
      return response.data;
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['tutors'] });
      toast({ title: 'Tutor cadastrado com sucesso!' });
      setShowForm(false);
      setFormData({ name: '', phone: '', email: '', cpf: '', address: '', city: '', state: '', zipCode: '' });
    },
    onError: (error: any) => {
      toast({
        title: 'Erro ao cadastrar',
        description: error.response?.data?.message || 'Tente novamente',
        variant: 'destructive',
      });
    },
  });

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();
    createMutation.mutate(formData);
  };

  return (
    <div className="space-y-6 pb-8">
      {/* Header com Banner */}
      <div className="relative overflow-hidden rounded-2xl bg-gradient-to-br from-green-500 via-emerald-500 to-green-600 p-6 text-white">
        <div className="absolute right-0 top-0 opacity-10">
          <Users className="h-48 w-48 -translate-y-8 translate-x-8" />
        </div>
        <div className="relative z-10 flex items-center justify-between">
          <div>
            <div className="flex items-center gap-2 mb-1">
              <Users className="h-5 w-5" />
              <span className="text-green-100 text-sm font-medium">Gestao de Clientes</span>
            </div>
            <h1 className="text-2xl font-bold">Tutores</h1>
            <p className="text-green-100 text-sm mt-1">
              {totalTutors} tutores cadastrados
            </p>
          </div>
          <Button
            onClick={() => setShowForm(true)}
            className="bg-white text-green-600 hover:bg-green-50 shadow-lg"
          >
            <Plus className="h-4 w-4 mr-2" />
            Novo Tutor
          </Button>
        </div>
      </div>

      {/* Barra de Busca */}
      <Card className="border-0 shadow-card">
        <CardContent className="p-4">
          <div className="relative">
            <Search className="absolute left-4 top-1/2 transform -translate-y-1/2 h-5 w-5 text-gray-400" />
            <Input
              placeholder="Buscar por nome, telefone, email ou CPF..."
              value={search}
              onChange={(e) => setSearch(e.target.value)}
              className="pl-12 h-12 text-base border-0 bg-gray-50 focus:bg-white transition-colors"
            />
          </div>
        </CardContent>
      </Card>

      {/* Formulario de Novo Tutor */}
      {showForm && (
        <Card className="border-0 shadow-card overflow-hidden">
          <CardHeader className="bg-gradient-to-r from-green-50 to-emerald-50 border-b">
            <div className="flex items-center justify-between">
              <div className="flex items-center gap-3">
                <div className="p-2 bg-green-100 rounded-xl">
                  <Plus className="h-5 w-5 text-green-600" />
                </div>
                <CardTitle>Novo Tutor</CardTitle>
              </div>
              <Button size="icon" variant="ghost" onClick={() => setShowForm(false)}>
                <X className="h-5 w-5" />
              </Button>
            </div>
          </CardHeader>
          <CardContent className="p-6">
            <form onSubmit={handleSubmit} className="grid gap-5 md:grid-cols-2">
              <div className="space-y-2">
                <label className="text-sm font-medium text-gray-700">Nome completo *</label>
                <Input
                  value={formData.name}
                  onChange={(e) => setFormData({ ...formData, name: e.target.value })}
                  placeholder="Digite o nome do tutor"
                  className="h-11"
                  required
                />
              </div>
              <div className="space-y-2">
                <label className="text-sm font-medium text-gray-700">Telefone *</label>
                <Input
                  value={formData.phone}
                  onChange={(e) => setFormData({ ...formData, phone: e.target.value })}
                  placeholder="(11) 99999-9999"
                  className="h-11"
                  required
                />
              </div>
              <div className="space-y-2">
                <label className="text-sm font-medium text-gray-700">Email</label>
                <Input
                  type="email"
                  value={formData.email}
                  onChange={(e) => setFormData({ ...formData, email: e.target.value })}
                  placeholder="email@exemplo.com"
                  className="h-11"
                />
              </div>
              <div className="space-y-2">
                <label className="text-sm font-medium text-gray-700">CPF</label>
                <Input
                  value={formData.cpf}
                  onChange={(e) => setFormData({ ...formData, cpf: e.target.value })}
                  placeholder="000.000.000-00"
                  className="h-11"
                />
              </div>
              <div className="md:col-span-2 space-y-2">
                <label className="text-sm font-medium text-gray-700">Endereco</label>
                <Input
                  value={formData.address}
                  onChange={(e) => setFormData({ ...formData, address: e.target.value })}
                  placeholder="Rua, numero, complemento"
                  className="h-11"
                />
              </div>
              <div className="space-y-2">
                <label className="text-sm font-medium text-gray-700">Cidade</label>
                <Input
                  value={formData.city}
                  onChange={(e) => setFormData({ ...formData, city: e.target.value })}
                  placeholder="Cidade"
                  className="h-11"
                />
              </div>
              <div className="space-y-2">
                <label className="text-sm font-medium text-gray-700">Estado</label>
                <Input
                  value={formData.state}
                  onChange={(e) => setFormData({ ...formData, state: e.target.value })}
                  placeholder="UF"
                  maxLength={2}
                  className="h-11"
                />
              </div>
              <div className="md:col-span-2 flex gap-3 justify-end pt-4 border-t">
                <Button type="button" variant="outline" onClick={() => setShowForm(false)} className="px-6">
                  Cancelar
                </Button>
                <Button
                  type="submit"
                  disabled={createMutation.isPending}
                  className="px-6 bg-gradient-to-r from-green-500 to-emerald-600 hover:from-green-600 hover:to-emerald-700"
                >
                  {createMutation.isPending ? 'Salvando...' : 'Cadastrar Tutor'}
                </Button>
              </div>
            </form>
          </CardContent>
        </Card>
      )}

      {/* Lista de Tutores */}
      {isLoading ? (
        <div className="flex flex-col items-center justify-center py-16">
          <div className="relative">
            <div className="animate-spin rounded-full h-12 w-12 border-4 border-green-200 border-t-green-600"></div>
            <PawPrint className="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 h-5 w-5 text-green-600" />
          </div>
          <p className="mt-4 text-gray-500">Carregando tutores...</p>
        </div>
      ) : tutors?.length === 0 ? (
        <Card className="border-0 shadow-card">
          <CardContent className="py-16 text-center">
            <div className="p-4 bg-gray-100 rounded-full w-fit mx-auto mb-4">
              <Users className="h-10 w-10 text-gray-400" />
            </div>
            <h3 className="font-semibold text-gray-900 mb-2">Nenhum tutor encontrado</h3>
            <p className="text-gray-500 mb-4">
              {search ? 'Tente buscar com outros termos' : 'Comece cadastrando seu primeiro tutor'}
            </p>
            {!search && (
              <Button onClick={() => setShowForm(true)} className="bg-gradient-to-r from-green-500 to-emerald-600">
                <Plus className="h-4 w-4 mr-2" />
                Cadastrar Tutor
              </Button>
            )}
          </CardContent>
        </Card>
      ) : (
        <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
          {tutors?.map((tutor: any) => (
            <Link key={tutor.id} href={`/dashboard/tutores/${tutor.id}`}>
              <Card className="group border-0 shadow-card hover:shadow-card-hover transition-all duration-300 cursor-pointer h-full">
                <CardContent className="p-5">
                  <div className="flex items-start gap-4">
                    {/* Avatar */}
                    <div className="w-14 h-14 rounded-2xl bg-gradient-to-br from-green-400 to-emerald-500 flex items-center justify-center text-white font-bold text-lg flex-shrink-0">
                      {tutor.name?.charAt(0)?.toUpperCase()}
                    </div>

                    {/* Info */}
                    <div className="flex-1 min-w-0">
                      <h3 className="font-semibold text-gray-900 truncate group-hover:text-green-600 transition-colors">
                        {tutor.name}
                      </h3>

                      <div className="mt-2 space-y-1">
                        <div className="flex items-center gap-2 text-sm text-gray-600">
                          <Phone className="h-3.5 w-3.5 text-gray-400" />
                          <span>{formatPhone(tutor.phone)}</span>
                        </div>
                        {tutor.email && (
                          <div className="flex items-center gap-2 text-sm text-gray-600 truncate">
                            <Mail className="h-3.5 w-3.5 text-gray-400 flex-shrink-0" />
                            <span className="truncate">{tutor.email}</span>
                          </div>
                        )}
                        {tutor.city && (
                          <div className="flex items-center gap-2 text-sm text-gray-600">
                            <MapPin className="h-3.5 w-3.5 text-gray-400" />
                            <span>{tutor.city}{tutor.state && `, ${tutor.state}`}</span>
                          </div>
                        )}
                      </div>

                      {/* Badges */}
                      <div className="flex items-center gap-2 mt-3">
                        <span className="inline-flex items-center gap-1 px-2 py-1 bg-blue-50 text-blue-700 rounded-lg text-xs font-medium">
                          <Dog className="h-3 w-3" />
                          {tutor._count?.pets || 0} pets
                        </span>
                        {tutor._count?.appointments > 0 && (
                          <span className="inline-flex items-center gap-1 px-2 py-1 bg-purple-50 text-purple-700 rounded-lg text-xs font-medium">
                            <Calendar className="h-3 w-3" />
                            {tutor._count.appointments}
                          </span>
                        )}
                      </div>
                    </div>

                    {/* Arrow */}
                    <ArrowRight className="h-5 w-5 text-gray-300 group-hover:text-green-500 group-hover:translate-x-1 transition-all flex-shrink-0" />
                  </div>

                  {tutor.lastVisitAt && (
                    <div className="mt-4 pt-3 border-t border-gray-100">
                      <p className="text-xs text-gray-500">
                        Ultima visita: {formatDate(tutor.lastVisitAt)}
                      </p>
                    </div>
                  )}
                </CardContent>
              </Card>
            </Link>
          ))}
        </div>
      )}
    </div>
  );
}