"use client";

import React, { useState } from "react";
import { useQuery } from "@apollo/client";
import { Card } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogTrigger,
} from "@/components/ui/dialog";
import { Sidebar } from "@/components/dashboard/sidebar";
import { useSidebar } from "@/hooks/useSidebar";
import { ProductForm } from "./product-form";
import { ProductCard } from "./product-card";
import { WarehouseStatistics } from "./warehouse-statistics";
import { GET_MY_PRODUCTS } from "@/graphql/queries";
import { Plus, Package, Grid3X3, List, Edit3, Trash2 } from "lucide-react";
import { Input } from "@/components/ui/input";

interface Product {
  id: string;
  name: string;
  article: string;
  description: string;
  price: number;
  pricePerSet?: number;
  quantity: number;
  setQuantity?: number;
  ordered?: number;
  inTransit?: number;
  stock?: number;
  sold?: number;
  type: "PRODUCT" | "CONSUMABLE";
  category: { id: string; name: string } | null;
  brand: string;
  color: string;
  size: string;
  weight: number;
  dimensions: string;
  material: string;
  images: string[];
  mainImage: string;
  isActive: boolean;
  createdAt: string;
  updatedAt: string;
}

export function WarehouseDashboard() {
  const { getSidebarMargin } = useSidebar();
  const [isDialogOpen, setIsDialogOpen] = useState(false);
  const [editingProduct, setEditingProduct] = useState<Product | null>(null);
  const [searchQuery, setSearchQuery] = useState("");
  const [viewMode, setViewMode] = useState<'cards' | 'table'>('cards');

  const { data, loading, error, refetch } = useQuery(GET_MY_PRODUCTS, {
    errorPolicy: "all",
  });

  const products: Product[] = data?.myProducts || [];

  // Фильтрация товаров по поисковому запросу
  const filteredProducts = products.filter(
    (product) =>
      product.name.toLowerCase().includes(searchQuery.toLowerCase()) ||
      product.article.toLowerCase().includes(searchQuery.toLowerCase()) ||
      product.category?.name
        ?.toLowerCase()
        .includes(searchQuery.toLowerCase()) ||
      product.brand?.toLowerCase().includes(searchQuery.toLowerCase())
  );

  const handleCreateProduct = () => {
    setEditingProduct(null);
    setIsDialogOpen(true);
  };

  const handleEditProduct = (product: Product) => {
    setEditingProduct(product);
    setIsDialogOpen(true);
  };

  const handleProductSaved = () => {
    setIsDialogOpen(false);
    setEditingProduct(null);
    refetch();
  };

  const handleProductDeleted = () => {
    refetch();
  };

  if (error) {
    return (
      <div className="h-screen flex overflow-hidden">
        <Sidebar />
        <main className="flex-1 ml-56 px-6 py-4 overflow-hidden">
          <div className="h-full w-full flex flex-col">
            <Card className="flex-1 bg-white/5 backdrop-blur border-white/10 p-6">
              <div className="flex items-center justify-center h-full">
                <div className="text-center">
                  <Package className="h-16 w-16 text-white/40 mx-auto mb-4" />
                  <h3 className="text-lg font-medium text-white mb-2">
                    Ошибка загрузки
                  </h3>
                  <p className="text-white/60 text-sm mb-4">
                    {error.message || "Не удалось загрузить товары"}
                  </p>
                  <Button
                    onClick={() => refetch()}
                    className="bg-purple-600 hover:bg-purple-700 text-white"
                  >
                    Попробовать снова
                  </Button>
                </div>
              </div>
            </Card>
          </div>
        </main>
      </div>
    );
  }

  return (
    <div className="h-screen flex overflow-hidden">
      <Sidebar />
      <main
        className={`flex-1 ${getSidebarMargin()} px-6 py-4 overflow-hidden transition-all duration-300`}
      >
        <div className="h-full w-full flex flex-col">
          {/* Поиск и управление */}
          <div className="flex items-center justify-between mb-4 flex-shrink-0">
            <div className="flex gap-4 items-center flex-1">
              <div className="relative max-w-md">
                <Input
                  type="text"
                  placeholder="Поиск по названию, артикулу, категории..."
                  value={searchQuery}
                  onChange={(e) => setSearchQuery(e.target.value)}
                  className="glass-input text-white placeholder:text-white/50 h-10"
                />
              </div>

              {/* Переключатель режимов отображения */}
              <div className="flex border border-white/10 rounded-lg overflow-hidden">
                <Button
                  onClick={() => setViewMode('cards')}
                  variant="ghost"
                  size="sm"
                  className={`px-3 h-10 rounded-none ${
                    viewMode === 'cards'
                      ? 'bg-purple-500/20 text-white border-purple-400/30'
                      : 'text-white/70 hover:text-white hover:bg-white/5'
                  }`}
                >
                  <Grid3X3 className="w-4 h-4" />
                </Button>
                <Button
                  onClick={() => setViewMode('table')}
                  variant="ghost"
                  size="sm"
                  className={`px-3 h-10 rounded-none border-l border-white/10 ${
                    viewMode === 'table'
                      ? 'bg-purple-500/20 text-white border-purple-400/30'
                      : 'text-white/70 hover:text-white hover:bg-white/5'
                  }`}
                >
                  <List className="w-4 h-4" />
                </Button>
              </div>
            </div>
            
            <Dialog open={isDialogOpen} onOpenChange={setIsDialogOpen}>
              <DialogTrigger asChild>
                <Button
                  onClick={handleCreateProduct}
                  className="bg-gradient-to-r from-purple-600 to-pink-600 hover:from-purple-700 hover:to-pink-700 text-white border-0 shadow-lg shadow-purple-500/25 transition-all duration-300"
                >
                  <Plus className="w-4 h-4 mr-2" />
                  Добавить товар/расходник
                </Button>
              </DialogTrigger>
              <DialogContent className="glass-card !w-[90vw] !max-w-[90vw] max-h-[95vh]" style={{ width: '90vw', maxWidth: '90vw' }}>
                <DialogHeader>
                  <DialogTitle className="text-white">
                    {editingProduct
                      ? "Редактировать товар/расходник"
                      : "Добавить товар/расходник"}
                  </DialogTitle>
                </DialogHeader>
                <ProductForm
                  product={editingProduct}
                  onSave={handleProductSaved}
                  onCancel={() => setIsDialogOpen(false)}
                />
              </DialogContent>
            </Dialog>
          </div>

          {/* Блок статистики */}
          <Card className="bg-white/5 backdrop-blur border-white/10 p-4 mb-4">
            <WarehouseStatistics products={filteredProducts} />
          </Card>

          {/* Основной контент */}
          <Card className="flex-1 bg-white/5 backdrop-blur border-white/10 p-6 overflow-y-auto">
{loading ? (
              <div className="flex items-center justify-center h-full">
                <div className="text-center">
                  <div className="animate-spin rounded-full h-16 w-16 border-4 border-white border-t-transparent mx-auto mb-4"></div>
                  <p className="text-white/70">Загрузка товаров...</p>
                </div>
              </div>
            ) : filteredProducts.length === 0 ? (
              <div className="flex items-center justify-center h-full">
                <div className="text-center">
                  <Package className="h-16 w-16 text-white/40 mx-auto mb-4" />
                  <h3 className="text-lg font-medium text-white mb-2">
                    {searchQuery ? "Товары не найдены" : "Склад пуст"}
                  </h3>
                  <p className="text-white/60 text-sm mb-4">
                    {searchQuery
                      ? "Попробуйте изменить критерии поиска"
                      : "Добавьте ваш первый товар на склад"}
                  </p>
                  {!searchQuery && (
                    <Button
                      onClick={handleCreateProduct}
                      className="bg-purple-600 hover:bg-purple-700 text-white"
                    >
                      <Plus className="w-4 h-4 mr-2" />
                      Добавить товар
                    </Button>
                  )}
                </div>
              </div>
            ) : (
              <div className="space-y-4">
                {viewMode === 'cards' ? (
                  <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 2xl:grid-cols-5 gap-4">
                    {filteredProducts.map((product) => (
                      <ProductCard
                        key={product.id}
                        product={product}
                        onEdit={handleEditProduct}
                        onDelete={handleProductDeleted}
                      />
                    ))}
                  </div>
                ) : (
                  <div className="space-y-2">
                    <div className="grid grid-cols-12 gap-4 p-4 text-white/60 text-sm font-medium border-b border-white/10">
                      <div className="col-span-1">Фото</div>
                      <div className="col-span-2">Название</div>
                      <div className="col-span-1">Артикул</div>
                      <div className="col-span-1">Тип</div>
                      <div className="col-span-1">Категория</div>
                      <div className="col-span-1">Цена</div>
                      <div className="col-span-1">Остаток</div>
                      <div className="col-span-1">Заказано</div>
                      <div className="col-span-1">В пути</div>
                      <div className="col-span-1">Продано</div>
                      <div className="col-span-1">Действия</div>
                    </div>
                    {filteredProducts.map((product) => (
                      <div key={product.id} className="grid grid-cols-12 gap-4 p-4 hover:bg-white/5 rounded-lg transition-colors">
                        <div className="col-span-1">
                          {product.mainImage || product.images[0] ? (
                            <img
                              src={product.mainImage || product.images[0]}
                              alt={product.name}
                              className="w-12 h-12 object-contain rounded bg-white/10"
                            />
                          ) : (
                            <div className="w-12 h-12 bg-white/10 rounded flex items-center justify-center">
                              <Package className="h-6 w-6 text-white/40" />
                            </div>
                          )}
                        </div>
                        <div className="col-span-2 text-white text-sm">
                          <div className="font-medium truncate">{product.name}</div>
                          <div className="text-white/60 text-xs">{product.brand}</div>
                        </div>
                        <div className="col-span-1 text-white/70 text-sm font-mono">{product.article}</div>
                        <div className="col-span-1">
                          <span className={`inline-block px-2 py-1 rounded text-xs ${
                            product.type === 'PRODUCT' 
                              ? 'bg-blue-500/20 text-blue-300 border border-blue-400/30' 
                              : 'bg-orange-500/20 text-orange-300 border border-orange-400/30'
                          }`}>
                            {product.type === 'PRODUCT' ? 'Товар' : 'Расходник'}
                          </span>
                        </div>
                        <div className="col-span-1 text-white/70 text-sm">
                          {product.category?.name || 'Нет'}
                        </div>
                        <div className="col-span-1 text-white text-sm font-medium">
                          {new Intl.NumberFormat('ru-RU', {
                            style: 'currency',
                            currency: 'RUB',
                            minimumFractionDigits: 0
                          }).format(product.price)}
                        </div>
                        <div className="col-span-1 text-white text-sm">
                          <span className={`${
                            (product.stock || product.quantity) === 0 ? 'text-red-400' :
                            (product.stock || product.quantity) < 10 ? 'text-yellow-400' : 'text-green-400'
                          }`}>
                            {product.stock || product.quantity || 0}
                          </span>
                        </div>
                        <div className="col-span-1 text-white/70 text-sm">{product.ordered || 0}</div>
                        <div className="col-span-1 text-white/70 text-sm">{product.inTransit || 0}</div>
                        <div className="col-span-1 text-white/70 text-sm">{product.sold || 0}</div>
                        <div className="col-span-1">
                          <div className="flex gap-1">
                            <Button
                              size="sm"
                              variant="outline"
                              onClick={() => handleEditProduct(product)}
                              className="p-1 h-7 w-7 bg-white/10 border-white/20 hover:bg-white/20"
                            >
                              <Edit3 className="h-3 w-3 text-white" />
                            </Button>
                            <Button
                              size="sm"
                              variant="outline"
                              className="p-1 h-7 w-7 bg-red-500/20 border-red-400/30 hover:bg-red-500/30"
                            >
                              <Trash2 className="h-3 w-3 text-white" />
                            </Button>
                          </div>
                        </div>
                      </div>
                    ))}
                  </div>
                )}
              </div>
            )}
          </Card>
        </div>
      </main>
    </div>
  );
}