import { useState } from 'react';
import { Plus, Pencil, Trash2, Search, ToggleLeft, ToggleRight } from 'lucide-react';
import {
  useVendors,
  useDeleteVendor,
  useCreateVendor,
  useUpdateVendor,
  useToggleVendorActive,
} from '../../../hooks/useBidding';
import {
  Vendor,
  CreateVendorDto,
} from '../../../services/bidding';
import clsx from 'clsx';

export function VendorsPage() {
  const [search, setSearch] = useState('');
  const [activeFilter, setActiveFilter] = useState<boolean | ''>('');
  const [showModal, setShowModal] = useState(false);
  const [editingItem, setEditingItem] = useState<Vendor | null>(null);
  const [deleteConfirm, setDeleteConfirm] = useState<string | null>(null);

  const { data, isLoading, error } = useVendors({
    isActive: activeFilter === '' ? undefined : activeFilter,
    businessName: search || undefined,
  });

  const deleteMutation = useDeleteVendor();
  const createMutation = useCreateVendor();
  const updateMutation = useUpdateVendor();
  const toggleActiveMutation = useToggleVendorActive();

  const handleDelete = async (id: string) => {
    await deleteMutation.mutateAsync(id);
    setDeleteConfirm(null);
  };

  const handleSubmit = async (formData: CreateVendorDto) => {
    if (editingItem) {
      await updateMutation.mutateAsync({ id: editingItem.id, data: formData });
    } else {
      await createMutation.mutateAsync(formData);
    }
    setShowModal(false);
    setEditingItem(null);
  };

  const handleToggleActive = async (id: string) => {
    await toggleActiveMutation.mutateAsync(id);
  };

  const vendors = data?.items || [];

  return (
    <div>
      <div className="flex items-center justify-between mb-6">
        <div>
          <h1 className="text-2xl font-bold text-gray-900">Proveedores</h1>
          <p className="text-gray-600">Gestion de proveedores y subcontratistas</p>
        </div>
        <button
          className="flex items-center px-4 py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors"
          onClick={() => {
            setEditingItem(null);
            setShowModal(true);
          }}
        >
          <Plus className="w-5 h-5 mr-2" />
          Nuevo Proveedor
        </button>
      </div>

      {/* Filters */}
      <div className="bg-white rounded-lg shadow-sm p-4 mb-6">
        <div className="flex flex-col sm:flex-row gap-4">
          <div className="flex-1 relative">
            <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-gray-400" />
            <input
              type="text"
              placeholder="Buscar por razon social..."
              className="w-full pl-10 pr-4 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
              value={search}
              onChange={(e) => setSearch(e.target.value)}
            />
          </div>
          <select
            className="px-4 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500"
            value={activeFilter === '' ? '' : activeFilter.toString()}
            onChange={(e) => {
              const val = e.target.value;
              setActiveFilter(val === '' ? '' : val === 'true');
            }}
          >
            <option value="">Todos</option>
            <option value="true">Activos</option>
            <option value="false">Inactivos</option>
          </select>
        </div>
      </div>

      {/* Table */}
      <div className="bg-white rounded-lg shadow-sm overflow-hidden">
        {isLoading ? (
          <div className="p-8 text-center text-gray-500">Cargando...</div>
        ) : error ? (
          <div className="p-8 text-center text-red-500">Error al cargar los datos</div>
        ) : vendors.length === 0 ? (
          <div className="p-8 text-center text-gray-500">No hay proveedores</div>
        ) : (
          <table className="min-w-full divide-y divide-gray-200">
            <thead className="bg-gray-50">
              <tr>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">
                  Razon Social
                </th>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">
                  RFC
                </th>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">
                  Contacto
                </th>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">
                  Email
                </th>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">
                  Telefono
                </th>
                <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">
                  Estado
                </th>
                <th className="px-6 py-3 text-right text-xs font-medium text-gray-500 uppercase">
                  Acciones
                </th>
              </tr>
            </thead>
            <tbody className="divide-y divide-gray-200">
              {vendors.map((item) => (
                <tr key={item.id} className="hover:bg-gray-50">
                  <td className="px-6 py-4 whitespace-nowrap text-sm font-medium text-gray-900">
                    {item.businessName}
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-900">
                    {item.rfc || '-'}
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-900">
                    {item.contactName || '-'}
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-500">
                    {item.email || '-'}
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-500">
                    {item.phone || '-'}
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap">
                    <button
                      onClick={() => handleToggleActive(item.id)}
                      disabled={toggleActiveMutation.isPending}
                      className={clsx(
                        'flex items-center gap-2 px-2 py-1 rounded-full text-xs font-medium transition-colors',
                        item.isActive
                          ? 'bg-green-100 text-green-800 hover:bg-green-200'
                          : 'bg-gray-100 text-gray-800 hover:bg-gray-200'
                      )}
                    >
                      {item.isActive ? (
                        <>
                          <ToggleRight className="w-4 h-4" />
                          Activo
                        </>
                      ) : (
                        <>
                          <ToggleLeft className="w-4 h-4" />
                          Inactivo
                        </>
                      )}
                    </button>
                  </td>
                  <td className="px-6 py-4 whitespace-nowrap text-right">
                    <div className="flex items-center justify-end gap-2">
                      <button
                        className="p-2 text-gray-500 hover:text-blue-600 hover:bg-blue-50 rounded-lg"
                        title="Editar"
                        onClick={() => {
                          setEditingItem(item);
                          setShowModal(true);
                        }}
                      >
                        <Pencil className="w-4 h-4" />
                      </button>
                      <button
                        className="p-2 text-gray-500 hover:text-red-600 hover:bg-red-50 rounded-lg"
                        title="Eliminar"
                        onClick={() => setDeleteConfirm(item.id)}
                      >
                        <Trash2 className="w-4 h-4" />
                      </button>
                    </div>
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        )}
      </div>

      {/* Modal */}
      {showModal && (
        <VendorModal
          item={editingItem}
          onClose={() => {
            setShowModal(false);
            setEditingItem(null);
          }}
          onSubmit={handleSubmit}
          isLoading={createMutation.isPending || updateMutation.isPending}
        />
      )}

      {/* Delete Confirmation */}
      {deleteConfirm && (
        <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
          <div className="bg-white rounded-lg p-6 max-w-md w-full mx-4">
            <h3 className="text-lg font-semibold mb-4">Confirmar eliminacion</h3>
            <p className="text-gray-600 mb-6">
              ¿Esta seguro de eliminar este proveedor? Esta accion no se puede deshacer.
            </p>
            <div className="flex justify-end gap-3">
              <button
                className="px-4 py-2 text-gray-700 border rounded-lg hover:bg-gray-50"
                onClick={() => setDeleteConfirm(null)}
              >
                Cancelar
              </button>
              <button
                className="px-4 py-2 bg-red-600 text-white rounded-lg hover:bg-red-700"
                onClick={() => handleDelete(deleteConfirm)}
                disabled={deleteMutation.isPending}
              >
                {deleteMutation.isPending ? 'Eliminando...' : 'Eliminar'}
              </button>
            </div>
          </div>
        </div>
      )}
    </div>
  );
}

// Modal Component
interface VendorModalProps {
  item: Vendor | null;
  onClose: () => void;
  onSubmit: (data: CreateVendorDto) => Promise<void>;
  isLoading: boolean;
}

function VendorModal({ item, onClose, onSubmit, isLoading }: VendorModalProps) {
  const [formData, setFormData] = useState<CreateVendorDto>({
    businessName: item?.businessName || '',
    rfc: item?.rfc || '',
    contactName: item?.contactName || '',
    email: item?.email || '',
    phone: item?.phone || '',
    isActive: item?.isActive ?? true,
  });

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    await onSubmit(formData);
  };

  return (
    <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
      <div className="bg-white rounded-lg p-6 max-w-lg w-full mx-4 max-h-[90vh] overflow-y-auto">
        <h3 className="text-lg font-semibold mb-4">
          {item ? 'Editar Proveedor' : 'Nuevo Proveedor'}
        </h3>
        <form onSubmit={handleSubmit} className="space-y-4">
          <div>
            <label className="block text-sm font-medium text-gray-700 mb-1">
              Razon Social *
            </label>
            <input
              type="text"
              required
              className="w-full px-3 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500"
              value={formData.businessName}
              onChange={(e) => setFormData({ ...formData, businessName: e.target.value })}
            />
          </div>
          <div>
            <label className="block text-sm font-medium text-gray-700 mb-1">
              RFC
            </label>
            <input
              type="text"
              className="w-full px-3 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500"
              placeholder="XAXX010101000"
              value={formData.rfc}
              onChange={(e) => setFormData({ ...formData, rfc: e.target.value.toUpperCase() })}
            />
          </div>
          <div>
            <label className="block text-sm font-medium text-gray-700 mb-1">
              Nombre de Contacto
            </label>
            <input
              type="text"
              className="w-full px-3 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500"
              value={formData.contactName}
              onChange={(e) => setFormData({ ...formData, contactName: e.target.value })}
            />
          </div>
          <div className="grid grid-cols-2 gap-4">
            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">
                Email
              </label>
              <input
                type="email"
                className="w-full px-3 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500"
                value={formData.email}
                onChange={(e) => setFormData({ ...formData, email: e.target.value })}
              />
            </div>
            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">
                Telefono
              </label>
              <input
                type="tel"
                className="w-full px-3 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500"
                value={formData.phone}
                onChange={(e) => setFormData({ ...formData, phone: e.target.value })}
              />
            </div>
          </div>
          <div className="flex items-center">
            <input
              type="checkbox"
              id="isActive"
              className="h-4 w-4 text-blue-600 focus:ring-blue-500 border-gray-300 rounded"
              checked={formData.isActive}
              onChange={(e) => setFormData({ ...formData, isActive: e.target.checked })}
            />
            <label htmlFor="isActive" className="ml-2 block text-sm text-gray-900">
              Proveedor activo
            </label>
          </div>
          <div className="flex justify-end gap-3 pt-4">
            <button
              type="button"
              className="px-4 py-2 text-gray-700 border rounded-lg hover:bg-gray-50"
              onClick={onClose}
            >
              Cancelar
            </button>
            <button
              type="submit"
              className="px-4 py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700 disabled:opacity-50"
              disabled={isLoading}
            >
              {isLoading ? 'Guardando...' : item ? 'Guardar Cambios' : 'Crear'}
            </button>
          </div>
        </form>
      </div>
    </div>
  );
}