import { useState, useEffect } from "react";
import { useLocation } from "wouter";
import { useAuth } from "@/hooks/use-auth";
import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
import { adminApi, categoriesApi, productsApi } from "@/lib/api";
import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import { z } from "zod";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { Form, FormControl, FormField, FormItem, FormLabel, FormMessage } from "@/components/ui/form";
import { Input } from "@/components/ui/input";
import { Badge } from "@/components/ui/badge";
import { Separator } from "@/components/ui/separator";
import { Skeleton } from "@/components/ui/skeleton";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogTrigger } from "@/components/ui/dialog";
import { useToast } from "@/hooks/use-toast";
import { Users, Store, Package, Settings, Plus, Trash2, Edit, Eye, ShoppingCart, MapPin, ExternalLink } from "lucide-react";

const sellerSchema = z.object({
  username: z.string().min(3, "Username must be at least 3 characters"),
  password: z.string().min(6, "Password must be at least 6 characters"),
});

const categorySchema = z.object({
  name: z.string().min(1, "Category name is required"),
  icon: z.string().optional(),
  imageUrl: z.string().url().optional().or(z.literal("")),
});

const productSchema = z.object({
  title: z.string().min(1, "Product title is required"),
  description: z.string().min(1, "Product description is required"),
  price: z.string().min(1, "Price is required"),
  originalPrice: z.string().optional(),
  stock: z.string().min(1, "Stock is required"),
  categoryId: z.string().min(1, "Category is required"),
  isActive: z.boolean().default(true),
});

type SellerFormData = z.infer<typeof sellerSchema>;
type CategoryFormData = z.infer<typeof categorySchema>;
type ProductFormData = z.infer<typeof productSchema>;

export default function AdminDev() {
  const [, setLocation] = useLocation();
  const { userType, adminLogin } = useAuth();
  const { toast } = useToast();
  const queryClient = useQueryClient();
  const [isSellerDialogOpen, setIsSellerDialogOpen] = useState(false);
  const [isCategoryDialogOpen, setIsCategoryDialogOpen] = useState(false);
  const [editingCategory, setEditingCategory] = useState<any>(null);
  const [editingProduct, setEditingProduct] = useState<any>(null);
  const [isProductDialogOpen, setIsProductDialogOpen] = useState(false);

  // Auto-login as admin if not already
  useEffect(() => {
    if (userType !== 'admin') {
      adminLogin();
    }
  }, [userType, adminLogin]);

  const { data: sellers = [], isLoading: sellersLoading } = useQuery({
    queryKey: ['/api/admin/sellers'],
    queryFn: () => adminApi.getSellers(),
  });

  const { data: categories = [], isLoading: categoriesLoading } = useQuery({
    queryKey: ['/api/categories'],
    queryFn: () => categoriesApi.getAll(),
  });

  const { data: products = [], isLoading: productsLoading } = useQuery({
    queryKey: ['/api/products'],
    queryFn: () => productsApi.getAll(),
  });

  const { data: orders = [], isLoading: ordersLoading } = useQuery({
    queryKey: ['/api/admin/orders'],
    queryFn: () => adminApi.getOrders(),
  });

  const { data: users = [], isLoading: usersLoading } = useQuery({
    queryKey: ['/api/admin/users'],
    queryFn: async () => {
      const response = await fetch('/api/admin/users');
      return response.json();
    },
  });

  const sellerForm = useForm<SellerFormData>({
    resolver: zodResolver(sellerSchema),
    defaultValues: {
      username: "",
      password: "",
    },
  });

  const categoryForm = useForm<CategoryFormData>({
    resolver: zodResolver(categorySchema),
    defaultValues: {
      name: "",
      icon: "",
      imageUrl: "",
    },
  });

  const productForm = useForm<ProductFormData>({
    resolver: zodResolver(productSchema),
    defaultValues: {
      title: "",
      description: "",
      price: "",
      originalPrice: "",
      stock: "",
      categoryId: "",
      isActive: true,
    },
  });

  const createSellerMutation = useMutation({
    mutationFn: (data: SellerFormData) => adminApi.createSeller(data),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['/api/admin/sellers'] });
      setIsSellerDialogOpen(false);
      sellerForm.reset();
      toast({
        title: "Seller created",
        description: "New seller account has been created successfully.",
      });
    },
    onError: () => {
      toast({
        variant: "destructive",
        title: "Error",
        description: "Failed to create seller account.",
      });
    },
  });

  const deleteSellerMutation = useMutation({
    mutationFn: (id: string) => adminApi.deleteSeller(id),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['/api/admin/sellers'] });
      toast({
        title: "Seller deleted",
        description: "Seller account and all associated products have been deleted.",
      });
    },
    onError: () => {
      toast({
        variant: "destructive",
        title: "Error",
        description: "Failed to delete seller account.",
      });
    },
  });

  const createCategoryMutation = useMutation({
    mutationFn: (data: CategoryFormData) => categoriesApi.create(data),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['/api/categories'] });
      setIsCategoryDialogOpen(false);
      categoryForm.reset();
      toast({
        title: "Category created",
        description: "New category has been created successfully.",
      });
    },
    onError: () => {
      toast({
        variant: "destructive",
        title: "Error",
        description: "Failed to create category.",
      });
    },
  });

  const deleteCategoryMutation = useMutation({
    mutationFn: (id: string) => categoriesApi.delete(id),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['/api/categories'] });
      toast({
        title: "Category deleted",
        description: "Category has been deleted successfully.",
      });
    },
    onError: () => {
      toast({
        variant: "destructive",
        title: "Error",
        description: "Failed to delete category.",
      });
    },
  });

  const updateCategoryMutation = useMutation({
    mutationFn: ({ id, data }: { id: string; data: CategoryFormData }) => 
      categoriesApi.update(id, data),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['/api/categories'] });
      setEditingCategory(null);
      setIsCategoryDialogOpen(false);
      categoryForm.reset();
      toast({
        title: "Category updated",
        description: "Category has been updated successfully.",
      });
    },
    onError: () => {
      toast({
        variant: "destructive",
        title: "Error",
        description: "Failed to update category.",
      });
    },
  });

  const updateProductMutation = useMutation({
    mutationFn: ({ id, data }: { id: string; data: ProductFormData }) => 
      adminApi.updateProduct(id, data),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['/api/products'] });
      setEditingProduct(null);
      setIsProductDialogOpen(false);
      productForm.reset();
      toast({
        title: "Product updated",
        description: "Product has been updated successfully.",
      });
    },
    onError: () => {
      toast({
        variant: "destructive",
        title: "Error",
        description: "Failed to update product.",
      });
    },
  });

  const deleteProductMutation = useMutation({
    mutationFn: (id: string) => adminApi.deleteProduct(id),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['/api/products'] });
      toast({
        title: "Product deleted",
        description: "Product has been deleted successfully.",
      });
    },
    onError: () => {
      toast({
        variant: "destructive",
        title: "Error",
        description: "Failed to delete product.",
      });
    },
  });

  const updateOrderMutation = useMutation({
    mutationFn: ({ id, data }: { id: string; data: any }) => adminApi.updateOrder(id, data),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['/api/admin/orders'] });
      toast({
        title: "Order updated",
        description: "Order status has been updated successfully.",
      });
    },
    onError: () => {
      toast({
        variant: "destructive",
        title: "Error",
        description: "Failed to update order status.",
      });
    },
  });

  const handleUpdateOrderStatus = (id: string, data: any) => {
    updateOrderMutation.mutate({ id, data });
  };

  const onCreateSeller = (data: SellerFormData) => {
    createSellerMutation.mutate(data);
  };

  const onCreateCategory = (data: CategoryFormData) => {
    createCategoryMutation.mutate(data);
  };

  const onEditCategory = (data: CategoryFormData) => {
    if (editingCategory) {
      updateCategoryMutation.mutate({ id: editingCategory.id, data });
    }
  };

  const onEditProduct = (data: ProductFormData) => {
    if (editingProduct) {
      updateProductMutation.mutate({ id: editingProduct.id, data });
    }
  };

  const handleEditCategory = (category: any) => {
    setEditingCategory(category);
    categoryForm.reset({
      name: category.name,
      icon: category.icon || "",
      imageUrl: category.imageUrl || "",
    });
    setIsCategoryDialogOpen(true);
  };

  const handleEditProduct = (product: any) => {
    setEditingProduct(product);
    productForm.reset({
      title: product.title,
      description: product.description,
      price: product.price.toString(),
      originalPrice: product.originalPrice ? product.originalPrice.toString() : "",
      stock: product.stock.toString(),
      categoryId: product.categoryId,
      isActive: product.isActive,
    });
    setIsProductDialogOpen(true);
  };

  const handleCancelEdit = () => {
    setEditingCategory(null);
    setEditingProduct(null);
    setIsCategoryDialogOpen(false);
    setIsProductDialogOpen(false);
    categoryForm.reset();
    productForm.reset();
  };

  return (
    <div className="min-h-screen page-gradient">
      <header className="glass-strong border-0 shadow-2xl">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="flex justify-between items-center h-16">
            <div>
              <h1 className="text-2xl font-bold text-primary" data-testid="admin-title">
                Shoposphere Admin
              </h1>
              <p className="text-sm text-muted-foreground">Developer Administration Panel</p>
            </div>
            <Button onClick={() => setLocation('/')} variant="outline" data-testid="back-to-site">
              Back to Site
            </Button>
          </div>
        </div>
      </header>

      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8" data-testid="admin-dev-page">
        <Tabs defaultValue="sellers" className="space-y-6">
          <TabsList className="glass-card border-0 grid w-full grid-cols-6">
            <TabsTrigger value="sellers" data-testid="sellers-tab">
              <Users className="mr-2 h-4 w-4" />
              Sellers
            </TabsTrigger>
            <TabsTrigger value="users" data-testid="users-tab">
              <MapPin className="mr-2 h-4 w-4" />
              Users
            </TabsTrigger>
            <TabsTrigger value="categories" data-testid="categories-tab">
              <Store className="mr-2 h-4 w-4" />
              Categories
            </TabsTrigger>
            <TabsTrigger value="products" data-testid="products-tab">
              <Package className="mr-2 h-4 w-4" />
              Products
            </TabsTrigger>
            <TabsTrigger value="orders" data-testid="orders-tab">
              <ShoppingCart className="mr-2 h-4 w-4" />
              Orders
            </TabsTrigger>
            <TabsTrigger value="settings" data-testid="settings-tab">
              <Settings className="mr-2 h-4 w-4" />
              Settings
            </TabsTrigger>
          </TabsList>

          <TabsContent value="sellers">
            <Card className="glass-card border-0">
              <CardHeader className="flex flex-row items-center justify-between">
                <CardTitle>Seller Management</CardTitle>
                <Dialog open={isSellerDialogOpen} onOpenChange={setIsSellerDialogOpen}>
                  <DialogTrigger asChild>
                    <Button data-testid="create-seller-button">
                      <Plus className="mr-2 h-4 w-4" />
                      Create Seller
                    </Button>
                  </DialogTrigger>
                  <DialogContent className="bg-white border border-black">
                    <DialogHeader>
                      <DialogTitle>Create New Seller</DialogTitle>
                    </DialogHeader>
                    <Form {...sellerForm}>
                      <form onSubmit={sellerForm.handleSubmit(onCreateSeller)} className="space-y-4">
                        <FormField
                          control={sellerForm.control}
                          name="username"
                          render={({ field }) => (
                            <FormItem>
                              <FormLabel>Username</FormLabel>
                              <FormControl>
                                <Input {...field} data-testid="seller-username-input" />
                              </FormControl>
                              <FormMessage />
                            </FormItem>
                          )}
                        />
                        <FormField
                          control={sellerForm.control}
                          name="password"
                          render={({ field }) => (
                            <FormItem>
                              <FormLabel>Password</FormLabel>
                              <FormControl>
                                <Input {...field} type="password" data-testid="seller-password-input" />
                              </FormControl>
                              <FormMessage />
                            </FormItem>
                          )}
                        />
                        <Button type="submit" className="w-full" data-testid="submit-seller">
                          Create Seller
                        </Button>
                      </form>
                    </Form>
                  </DialogContent>
                </Dialog>
              </CardHeader>
              <CardContent>
                {sellersLoading ? (
                  <div className="space-y-4">
                    {[...Array(3)].map((_, i) => (
                      <div key={i} className="flex items-center justify-between p-4 glass border-0 rounded-2xl">
                        <Skeleton className="h-6 w-48" />
                        <Skeleton className="h-8 w-20" />
                      </div>
                    ))}
                  </div>
                ) : sellers.length > 0 ? (
                  <div className="space-y-4" data-testid="sellers-list">
                    {sellers.map((seller: any) => (
                      <div key={seller.id} className="flex items-center justify-between p-4 glass border-0 rounded-2xl hover:scale-105 transition-all duration-300" data-testid={`seller-${seller.id}`}>
                        <div>
                          <h3 className="font-medium text-foreground" data-testid={`seller-username-${seller.id}`}>
                            {seller.username}
                          </h3>
                          <p className="text-sm text-muted-foreground" data-testid={`seller-created-${seller.id}`}>
                            Created: {new Date(seller.createdAt).toLocaleDateString()}
                          </p>
                          <div className="mt-2 p-2 bg-yellow-50 dark:bg-yellow-900/20 rounded border">
                            <p className="text-xs font-medium text-yellow-800 dark:text-yellow-200 mb-1">Login Credentials:</p>
                            <p className="text-xs text-yellow-700 dark:text-yellow-300" data-testid={`seller-credentials-${seller.id}`}>
                              <span className="font-medium">Username:</span> {seller.username}<br/>
                              <span className="font-medium">Password:</span> {seller.plainTextPassword || 'Not available'}
                            </p>
                          </div>
                        </div>
                        <div className="flex items-center space-x-2">
                          <Button
                            variant="outline"
                            size="sm"
                            onClick={() => setLocation(`/admin-prospective=seller`)}
                            data-testid={`view-seller-${seller.id}`}
                          >
                            <Eye className="h-4 w-4" />
                          </Button>
                          <Button
                            variant="destructive"
                            size="sm"
                            onClick={() => deleteSellerMutation.mutate(seller.id)}
                            data-testid={`delete-seller-${seller.id}`}
                          >
                            <Trash2 className="h-4 w-4" />
                          </Button>
                        </div>
                      </div>
                    ))}
                  </div>
                ) : (
                  <div className="text-center py-12" data-testid="no-sellers">
                    <Users className="h-12 w-12 text-muted-foreground mx-auto mb-4" />
                    <p className="text-muted-foreground">No sellers created yet.</p>
                  </div>
                )}
              </CardContent>
            </Card>
          </TabsContent>

          <TabsContent value="users">
            <Card className="glass-card border-0">
              <CardHeader>
                <CardTitle className="flex items-center gap-2">
                  <MapPin className="h-5 w-5" />
                  User Locations & Information
                </CardTitle>
              </CardHeader>
              <CardContent>
                {usersLoading ? (
                  <div className="space-y-4">
                    {[...Array(5)].map((_, i) => (
                      <div key={i} className="flex items-center justify-between p-4 glass border-0 rounded-2xl">
                        <Skeleton className="h-6 w-48" />
                        <Skeleton className="h-8 w-20" />
                      </div>
                    ))}
                  </div>
                ) : users.length > 0 ? (
                  <div className="space-y-4" data-testid="users-list">
                    {users.map((user: any) => (
                      <div key={user.id} className="flex items-start justify-between p-4 glass border-0 rounded-2xl hover:scale-[1.02] transition-all duration-300" data-testid={`user-${user.id}`}>
                        <div className="flex-1">
                          <div className="flex items-center gap-3 mb-2">
                            <h3 className="font-medium text-foreground" data-testid={`user-name-${user.id}`}>
                              {user.firstName} {user.lastName}
                            </h3>
                            <Badge variant="secondary" className="text-xs">
                              @{user.username}
                            </Badge>
                          </div>
                          
                          <div className="space-y-1 text-sm text-muted-foreground mb-3">
                            <p data-testid={`user-contact-${user.id}`}>
                              📧 {user.email} • 📞 {user.phone}
                            </p>
                            <p className="text-xs">
                              Joined: {new Date(user.createdAt).toLocaleDateString()}
                            </p>
                          </div>
                          
                          {/* Location Information */}
                          <div className="mt-3 p-3 bg-gray-50 dark:bg-gray-800/50 rounded-lg">
                            {user.locationDetectedAutomatically && user.googleMapsUrl ? (
                              <div className="space-y-2">
                                <div className="flex items-center gap-2">
                                  <MapPin className="h-4 w-4 text-green-600" />
                                  <span className="text-sm font-medium text-green-600" data-testid={`user-location-auto-${user.id}`}>
                                    Auto-detected location
                                  </span>
                                </div>
                                <div className="flex items-center gap-2 text-xs text-gray-600 dark:text-gray-400">
                                  <span data-testid={`coordinates-${user.id}`}>
                                    📍 {Number(user.latitude).toFixed(4)}, {Number(user.longitude).toFixed(4)}
                                  </span>
                                </div>
                                <Button
                                  size="sm"
                                  variant="outline"
                                  className="h-7 px-2 text-xs"
                                  onClick={() => window.open(user.googleMapsUrl, '_blank')}
                                  data-testid={`view-location-${user.id}`}
                                >
                                  <ExternalLink className="mr-1 h-3 w-3" />
                                  View on Google Maps
                                </Button>
                              </div>
                            ) : user.street && user.city ? (
                              <div className="space-y-2">
                                <div className="flex items-center gap-2">
                                  <MapPin className="h-4 w-4 text-blue-600" />
                                  <span className="text-sm font-medium text-blue-600">
                                    Manual address
                                  </span>
                                </div>
                                <p className="text-sm text-gray-600 dark:text-gray-400" data-testid={`user-location-manual-${user.id}`}>
                                  {user.street}, {user.city}, {user.state} {user.pinCode}, {user.country}
                                </p>
                              </div>
                            ) : (
                              <div className="flex items-center gap-2">
                                <MapPin className="h-4 w-4 text-gray-400" />
                                <span className="text-sm text-gray-400" data-testid={`user-location-none-${user.id}`}>
                                  No location provided
                                </span>
                              </div>
                            )}
                          </div>
                        </div>
                        
                        <div className="text-right text-xs text-muted-foreground">
                          <p>User ID: {user.id.slice(-8)}</p>
                        </div>
                      </div>
                    ))}
                  </div>
                ) : (
                  <div className="text-center py-12" data-testid="no-users">
                    <Users className="h-12 w-12 text-muted-foreground mx-auto mb-4" />
                    <p className="text-muted-foreground">No users registered yet.</p>
                  </div>
                )}
              </CardContent>
            </Card>
          </TabsContent>

          <TabsContent value="categories">
            <Card className="glass-card border-0">
              <CardHeader className="flex flex-row items-center justify-between">
                <CardTitle>Category Management</CardTitle>
                <Dialog open={isCategoryDialogOpen} onOpenChange={(open) => {
                  setIsCategoryDialogOpen(open);
                  if (!open) handleCancelEdit();
                }}>
                  <DialogTrigger asChild>
                    <Button data-testid="create-category-button">
                      <Plus className="mr-2 h-4 w-4" />
                      Create Category
                    </Button>
                  </DialogTrigger>
                  <DialogContent className="bg-white border border-black">
                    <DialogHeader>
                      <DialogTitle>{editingCategory ? 'Edit Category' : 'Create New Category'}</DialogTitle>
                    </DialogHeader>
                    <Form {...categoryForm}>
                      <form onSubmit={categoryForm.handleSubmit(editingCategory ? onEditCategory : onCreateCategory)} className="space-y-4">
                        <FormField
                          control={categoryForm.control}
                          name="name"
                          render={({ field }) => (
                            <FormItem>
                              <FormLabel>Category Name</FormLabel>
                              <FormControl>
                                <Input {...field} data-testid="category-name-input" />
                              </FormControl>
                              <FormMessage />
                            </FormItem>
                          )}
                        />
                        <FormField
                          control={categoryForm.control}
                          name="icon"
                          render={({ field }) => (
                            <FormItem>
                              <FormLabel>Icon (optional)</FormLabel>
                              <FormControl>
                                <Input {...field} placeholder="fa-laptop" data-testid="category-icon-input" />
                              </FormControl>
                              <FormMessage />
                            </FormItem>
                          )}
                        />
                        <FormField
                          control={categoryForm.control}
                          name="imageUrl"
                          render={({ field }) => (
                            <FormItem>
                              <FormLabel>Image URL (optional)</FormLabel>
                              <FormControl>
                                <Input {...field} placeholder="https://example.com/image.jpg" data-testid="category-image-input" />
                              </FormControl>
                              <FormMessage />
                            </FormItem>
                          )}
                        />
                        <div className="flex space-x-2">
                          <Button 
                            type="submit" 
                            className="flex-1" 
                            data-testid="submit-category"
                            disabled={updateCategoryMutation.isPending || createCategoryMutation.isPending}
                          >
                            {editingCategory ? 'Update Category' : 'Create Category'}
                          </Button>
                          {editingCategory && (
                            <Button 
                              type="button" 
                              variant="outline" 
                              onClick={handleCancelEdit}
                              data-testid="cancel-edit-category"
                            >
                              Cancel
                            </Button>
                          )}
                        </div>
                      </form>
                    </Form>
                  </DialogContent>
                </Dialog>
              </CardHeader>
              <CardContent>
                {categoriesLoading ? (
                  <div className="space-y-4">
                    {[...Array(3)].map((_, i) => (
                      <div key={i} className="flex items-center justify-between p-4 glass border-0 rounded-2xl">
                        <Skeleton className="h-6 w-48" />
                        <Skeleton className="h-8 w-20" />
                      </div>
                    ))}
                  </div>
                ) : categories.length > 0 ? (
                  <div className="space-y-4" data-testid="categories-list">
                    {categories.map((category: any) => (
                      <div key={category.id} className="flex items-center justify-between p-4 glass border-0 rounded-2xl hover:scale-105 transition-all duration-300" data-testid={`category-${category.id}`}>
                        <div className="flex items-center space-x-3">
                          {category.imageUrl && (
                            <div className="w-10 h-10 rounded-full overflow-hidden bg-gray-100 flex-shrink-0">
                              <img 
                                src={category.imageUrl} 
                                alt={category.name}
                                className="w-full h-full object-cover"
                              />
                            </div>
                          )}
                          <div>
                            <h3 className="font-medium text-foreground" data-testid={`category-name-${category.id}`}>
                              {category.name}
                            </h3>
                            {category.icon && (
                              <p className="text-sm text-muted-foreground" data-testid={`category-icon-${category.id}`}>
                                Icon: {category.icon}
                              </p>
                            )}
                            {category.imageUrl && (
                              <p className="text-xs text-muted-foreground truncate max-w-48" data-testid={`category-image-${category.id}`}>
                                Image: {category.imageUrl}
                              </p>
                            )}
                          </div>
                        </div>
                        <div className="flex items-center space-x-2">
                          <Button
                            variant="outline"
                            size="sm"
                            onClick={() => handleEditCategory(category)}
                            data-testid={`edit-category-${category.id}`}
                          >
                            <Edit className="h-4 w-4" />
                          </Button>
                          <Button
                            variant="destructive"
                            size="sm"
                            onClick={() => deleteCategoryMutation.mutate(category.id)}
                            data-testid={`delete-category-${category.id}`}
                          >
                            <Trash2 className="h-4 w-4" />
                          </Button>
                        </div>
                      </div>
                    ))}
                  </div>
                ) : (
                  <div className="text-center py-12" data-testid="no-categories">
                    <Store className="h-12 w-12 text-muted-foreground mx-auto mb-4" />
                    <p className="text-muted-foreground">No categories created yet.</p>
                  </div>
                )}
              </CardContent>
            </Card>
          </TabsContent>

          <TabsContent value="products">
            <Card className="glass-card border-0">
              <CardHeader className="flex flex-row items-center justify-between">
                <CardTitle>Product Management</CardTitle>
                <Dialog open={isProductDialogOpen} onOpenChange={(open) => {
                  setIsProductDialogOpen(open);
                  if (!open) handleCancelEdit();
                }}>
                  <DialogTrigger asChild>
                    <Button variant="outline" data-testid="edit-products-button">
                      <Edit className="mr-2 h-4 w-4" />
                      Edit Mode
                    </Button>
                  </DialogTrigger>
                  <DialogContent className="bg-white border border-black max-w-2xl">
                    <DialogHeader>
                      <DialogTitle>Edit Product</DialogTitle>
                    </DialogHeader>
                    {editingProduct && (
                      <Form {...productForm}>
                        <form onSubmit={productForm.handleSubmit(onEditProduct)} className="space-y-4">
                          <div className="grid grid-cols-2 gap-4">
                            <FormField
                              control={productForm.control}
                              name="title"
                              render={({ field }) => (
                                <FormItem className="col-span-2">
                                  <FormLabel>Product Title</FormLabel>
                                  <FormControl>
                                    <Input {...field} data-testid="product-title-input" />
                                  </FormControl>
                                  <FormMessage />
                                </FormItem>
                              )}
                            />
                            <FormField
                              control={productForm.control}
                              name="description"
                              render={({ field }) => (
                                <FormItem className="col-span-2">
                                  <FormLabel>Description</FormLabel>
                                  <FormControl>
                                    <Input {...field} data-testid="product-description-input" />
                                  </FormControl>
                                  <FormMessage />
                                </FormItem>
                              )}
                            />
                            <FormField
                              control={productForm.control}
                              name="price"
                              render={({ field }) => (
                                <FormItem>
                                  <FormLabel>Price</FormLabel>
                                  <FormControl>
                                    <Input {...field} type="number" step="0.01" data-testid="product-price-input" />
                                  </FormControl>
                                  <FormMessage />
                                </FormItem>
                              )}
                            />
                            <FormField
                              control={productForm.control}
                              name="originalPrice"
                              render={({ field }) => (
                                <FormItem>
                                  <FormLabel>Original Price (optional)</FormLabel>
                                  <FormControl>
                                    <Input {...field} type="number" step="0.01" data-testid="product-original-price-input" />
                                  </FormControl>
                                  <FormMessage />
                                </FormItem>
                              )}
                            />
                            <FormField
                              control={productForm.control}
                              name="stock"
                              render={({ field }) => (
                                <FormItem>
                                  <FormLabel>Stock</FormLabel>
                                  <FormControl>
                                    <Input {...field} type="number" data-testid="product-stock-input" />
                                  </FormControl>
                                  <FormMessage />
                                </FormItem>
                              )}
                            />
                            <FormField
                              control={productForm.control}
                              name="categoryId"
                              render={({ field }) => (
                                <FormItem>
                                  <FormLabel>Category</FormLabel>
                                  <FormControl>
                                    <select {...field} className="w-full p-2 border rounded" data-testid="product-category-select">
                                      <option value="">Select a category</option>
                                      {categories.map((category: any) => (
                                        <option key={category.id} value={category.id}>
                                          {category.name}
                                        </option>
                                      ))}
                                    </select>
                                  </FormControl>
                                  <FormMessage />
                                </FormItem>
                              )}
                            />
                          </div>
                          <div className="flex space-x-2">
                            <Button 
                              type="submit" 
                              className="flex-1" 
                              data-testid="submit-product"
                              disabled={updateProductMutation.isPending}
                            >
                              Update Product
                            </Button>
                            <Button 
                              type="button" 
                              variant="outline" 
                              onClick={handleCancelEdit}
                              data-testid="cancel-edit-product"
                            >
                              Cancel
                            </Button>
                          </div>
                        </form>
                      </Form>
                    )}
                  </DialogContent>
                </Dialog>
              </CardHeader>
              <CardContent>
                {productsLoading ? (
                  <div className="space-y-4">
                    {[...Array(5)].map((_, i) => (
                      <div key={i} className="flex items-center justify-between p-4 border rounded-lg">
                        <div className="flex items-center space-x-4">
                          <Skeleton className="w-16 h-16" />
                          <div>
                            <Skeleton className="h-6 w-48 mb-2" />
                            <Skeleton className="h-4 w-32" />
                          </div>
                        </div>
                        <Skeleton className="h-8 w-20" />
                      </div>
                    ))}
                  </div>
                ) : products.length > 0 ? (
                  <div className="space-y-4" data-testid="products-list">
                    {products.map((product: any) => (
                      <div key={product.id} className="flex items-center justify-between p-4 glass border-0 rounded-2xl hover:scale-105 transition-all duration-300" data-testid={`product-${product.id}`}>
                        <div className="flex items-center space-x-4">
                          <div className="w-16 h-16 bg-gray-100 rounded overflow-hidden">
                            {product.images && product.images.length > 0 ? (
                              <img
                                src={product.images[0]}
                                alt={product.title}
                                className="w-full h-full object-cover"
                              />
                            ) : (
                              <div className="w-full h-full bg-gray-200 flex items-center justify-center">
                                <span className="text-xs text-gray-400">No Image</span>
                              </div>
                            )}
                          </div>
                          <div>
                            <h3 className="font-medium text-gray-900" data-testid={`product-title-${product.id}`}>
                              {product.title}
                            </h3>
                            <p className="text-sm text-gray-500" data-testid={`product-seller-${product.id}`}>
                              By: {product.seller?.username || 'Unknown Seller'}
                            </p>
                            <div className="flex items-center space-x-2 mt-1">
                              <span className="text-sm font-semibold text-gray-900" data-testid={`product-price-${product.id}`}>
                                ₹{parseFloat(product.price).toFixed(2)}
                              </span>
                              <Badge variant={product.isActive ? 'default' : 'secondary'} data-testid={`product-status-${product.id}`}>
                                {product.isActive ? 'Active' : 'Inactive'}
                              </Badge>
                            </div>
                          </div>
                        </div>
                        <div className="flex items-center space-x-2">
                          <Button
                            variant="outline"
                            size="sm"
                            onClick={() => setLocation(`/product/${product.id}`)}
                            data-testid={`view-product-${product.id}`}
                          >
                            <Eye className="h-4 w-4" />
                          </Button>
                          <Button
                            variant="outline"
                            size="sm"
                            onClick={() => handleEditProduct(product)}
                            data-testid={`edit-product-${product.id}`}
                          >
                            <Edit className="h-4 w-4" />
                          </Button>
                          <Button
                            variant="destructive"
                            size="sm"
                            onClick={() => deleteProductMutation.mutate(product.id)}
                            data-testid={`delete-product-${product.id}`}
                          >
                            <Trash2 className="h-4 w-4" />
                          </Button>
                        </div>
                      </div>
                    ))}
                  </div>
                ) : (
                  <div className="text-center py-12" data-testid="no-products">
                    <Package className="h-12 w-12 text-gray-400 mx-auto mb-4" />
                    <p className="text-gray-500">No products available.</p>
                  </div>
                )}
              </CardContent>
            </Card>
          </TabsContent>

          <TabsContent value="settings">
            <Card className="glass-card border-0">
              <CardHeader>
                <CardTitle>System Settings</CardTitle>
              </CardHeader>
              <CardContent>
                <div className="space-y-6" data-testid="settings-panel">
                  <div>
                    <h3 className="text-lg font-medium text-foreground mb-2">Platform Statistics</h3>
                    <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
                      <div className="glass-card p-4 rounded-2xl">
                        <div className="text-2xl font-bold text-primary" data-testid="total-sellers">
                          {sellers.length}
                        </div>
                        <div className="text-sm text-muted-foreground">Total Sellers</div>
                      </div>
                      <div className="glass-card p-4 rounded-2xl">
                        <div className="text-2xl font-bold text-primary" data-testid="total-products">
                          {products.length}
                        </div>
                        <div className="text-sm text-muted-foreground">Total Products</div>
                      </div>
                      <div className="glass-card p-4 rounded-2xl">
                        <div className="text-2xl font-bold text-primary" data-testid="total-categories">
                          {categories.length}
                        </div>
                        <div className="text-sm text-muted-foreground">Total Categories</div>
                      </div>
                    </div>
                  </div>

                  <Separator />

                  <div>
                    <h3 className="text-lg font-medium text-foreground mb-2">Quick Actions</h3>
                    <div className="flex space-x-4">
                      <Button variant="outline" data-testid="backup-data">
                        Backup Data
                      </Button>
                      <Button variant="outline" data-testid="export-reports">
                        Export Reports
                      </Button>
                      <Button variant="outline" data-testid="system-logs">
                        View System Logs
                      </Button>
                    </div>
                  </div>
                </div>
              </CardContent>
            </Card>
          </TabsContent>

          <TabsContent value="orders">
            <Card className="glass-card border-0">
              <CardHeader>
                <CardTitle className="flex items-center space-x-2">
                  <ShoppingCart className="h-5 w-5" />
                  <span>Order Management</span>
                </CardTitle>
              </CardHeader>
              <CardContent>
                {ordersLoading ? (
                  <div className="space-y-4">
                    {[...Array(5)].map((_, i) => (
                      <Skeleton key={i} className="h-32 w-full" />
                    ))}
                  </div>
                ) : orders.length === 0 ? (
                  <div className="text-center py-12">
                    <ShoppingCart className="h-12 w-12 text-gray-400 mx-auto mb-4" />
                    <p className="text-gray-500">No orders found.</p>
                  </div>
                ) : (
                  <div className="space-y-4" data-testid="admin-orders-list">
                    {orders.map((order: any) => (
                      <div key={order.id} className="border border-gray-200 rounded-lg p-6" data-testid={`admin-order-${order.id}`}>
                        <div className="flex items-start justify-between mb-4">
                          <div>
                            <h3 className="font-semibold text-lg">
                              Order #{order.id.slice(-8)}
                            </h3>
                            <p className="text-sm text-gray-600">
                              Placed on {new Date(order.createdAt).toLocaleDateString('en-US', {
                                year: 'numeric',
                                month: 'long',
                                day: 'numeric'
                              })}
                            </p>
                          </div>
                          <div className="text-right">
                            <div className="flex items-center space-x-2 mb-2">
                              <Badge
                                variant={
                                  order.status === 'delivered' ? 'default' :
                                  order.status === 'shipped' ? 'secondary' :
                                  order.status === 'pending' ? 'outline' :
                                  'destructive'
                                }
                              >
                                {order.status}
                              </Badge>
                              <Badge variant={order.paymentStatus === 'paid' ? 'default' : 'destructive'}>
                                {order.paymentStatus === 'paid' ? 'Paid' : 'Unpaid'}
                              </Badge>
                            </div>
                            <p className="text-lg font-semibold">
                              ₹{parseFloat(order.total).toFixed(2)}
                            </p>
                          </div>
                        </div>

                        {/* Customer Info */}
                        <div className="bg-gray-50 rounded-lg p-4 mb-4">
                          <h4 className="font-medium mb-2">Customer Information</h4>
                          {order.user && (
                            <div className="grid grid-cols-2 gap-4 mb-3">
                              <div>
                                <p className="text-sm"><span className="font-medium">Name:</span> {order.user.firstName} {order.user.lastName}</p>
                                <p className="text-sm"><span className="font-medium">Email:</span> {order.user.email}</p>
                              </div>
                              <div>
                                <p className="text-sm"><span className="font-medium">Phone:</span> {order.user.phone}</p>
                                <p className="text-sm"><span className="font-medium">Payment:</span> {order.paymentMethod === 'cod' ? 'Cash on Delivery' : 'UPI'}</p>
                              </div>
                            </div>
                          )}
                          <p className="text-sm text-gray-600"><span className="font-medium">Address:</span> {order.shippingAddress}</p>
                        </div>

                        {/* Admin Order Management Actions */}
                        <div className="flex items-center space-x-2 mb-4 p-3 bg-red-50 rounded-lg">
                          <div className="flex items-center space-x-2">
                            <label className="text-sm font-medium">Status:</label>
                            <select 
                              className="px-3 py-1 text-sm border rounded"
                              value={order.status}
                              onChange={(e) => handleUpdateOrderStatus(order.id, { status: e.target.value })}
                            >
                              <option value="pending">Pending</option>
                              <option value="processing">Processing</option>
                              <option value="shipped">Shipped</option>
                              <option value="delivered">Delivered</option>
                              <option value="cancelled">Cancelled</option>
                            </select>
                          </div>
                          <Button
                            size="sm"
                            variant={order.paymentStatus === 'paid' ? 'outline' : 'default'}
                            onClick={() => handleUpdateOrderStatus(order.id, { 
                              paymentStatus: order.paymentStatus === 'paid' ? 'unpaid' : 'paid' 
                            })}
                          >
                            Mark as {order.paymentStatus === 'paid' ? 'Unpaid' : 'Paid'}
                          </Button>
                        </div>

                        {/* Order Items */}
                        <div>
                          <h4 className="font-medium mb-3">Items Ordered</h4>
                          <div className="space-y-2">
                            {order.items?.map((item: any, index: number) => (
                              <div key={index} className="flex items-center justify-between py-2 border-b border-gray-100 last:border-0">
                                <div className="flex items-center space-x-3">
                                  <div className="w-12 h-12 bg-gray-100 rounded overflow-hidden">
                                    {item.product?.images?.[0] ? (
                                      <img
                                        src={item.product.images[0]}
                                        alt={item.product.title}
                                        className="w-full h-full object-cover"
                                      />
                                    ) : (
                                      <div className="w-full h-full bg-gray-200 flex items-center justify-center">
                                        <Package className="h-4 w-4 text-gray-400" />
                                      </div>
                                    )}
                                  </div>
                                  <div>
                                    <p className="font-medium text-sm">{item.product?.title}</p>
                                    <p className="text-xs text-gray-500">Qty: {item.quantity}</p>
                                  </div>
                                </div>
                                <div className="text-right">
                                  <p className="font-medium text-sm">₹{parseFloat(item.price).toFixed(2)}</p>
                                  <p className="text-xs text-gray-500">₹{(parseFloat(item.price) * item.quantity).toFixed(2)} total</p>
                                </div>
                              </div>
                            ))}
                          </div>
                        </div>

                        <div className="flex justify-end mt-4 pt-4 border-t">
                          <div className="text-right">
                            <p className="text-sm text-gray-600">Subtotal: ₹{parseFloat(order.subtotal).toFixed(2)}</p>
                            <p className="text-sm text-gray-600">Tax: ₹{parseFloat(order.tax).toFixed(2)}</p>
                            <p className="text-sm text-gray-600">Shipping: ₹{parseFloat(order.shipping || '0').toFixed(2)}</p>
                            <p className="font-semibold text-lg">Total: ₹{parseFloat(order.total).toFixed(2)}</p>
                          </div>
                        </div>
                      </div>
                    ))}
                  </div>
                )}
              </CardContent>
            </Card>
          </TabsContent>
        </Tabs>
      </div>
    </div>
  );
}