import { useEffect, useState } from 'react';
import { useParams, useNavigate } from 'react-router-dom';
import { Layout } from '../components/Layout';
import { api } from '../lib/api';
import {
  Building2,
  Phone,
  MapPin,
  ExternalLink,
  ArrowLeft,
  Package,
  Tag,
  RefreshCw,
  ChevronDown,
  Clock,
  CheckCircle,
  XCircle,
  AlertCircle
} from 'lucide-react';

export function DutchieAZStoreDetail() {
  const { id } = useParams();
  const navigate = useNavigate();
  const [summary, setSummary] = useState<any>(null);
  const [products, setProducts] = useState<any[]>([]);
  const [loading, setLoading] = useState(true);
  const [productsLoading, setProductsLoading] = useState(false);
  const [activeTab, setActiveTab] = useState<'products' | 'brands' | 'categories'>('products');
  const [showUpdateDropdown, setShowUpdateDropdown] = useState(false);
  const [isUpdating, setIsUpdating] = useState(false);
  const [searchQuery, setSearchQuery] = useState('');
  const [currentPage, setCurrentPage] = useState(1);
  const [totalProducts, setTotalProducts] = useState(0);
  const [itemsPerPage] = useState(25);
  const [stockFilter, setStockFilter] = useState<string>('');

  const formatDate = (dateStr: string) => {
    if (!dateStr) return 'Never';
    const date = new Date(dateStr);
    const now = new Date();
    const diffMs = now.getTime() - date.getTime();
    const diffDays = Math.floor(diffMs / (1000 * 60 * 60 * 24));

    if (diffDays === 0) return 'Today';
    if (diffDays === 1) return 'Yesterday';
    if (diffDays < 7) return `${diffDays} days ago`;
    return date.toLocaleDateString();
  };

  useEffect(() => {
    if (id) {
      loadStoreSummary();
    }
  }, [id]);

  useEffect(() => {
    if (id && activeTab === 'products') {
      loadProducts();
    }
  }, [id, currentPage, searchQuery, stockFilter, activeTab]);

  // Reset to page 1 when filters change
  useEffect(() => {
    setCurrentPage(1);
  }, [searchQuery, stockFilter]);

  const loadStoreSummary = async () => {
    setLoading(true);
    try {
      const data = await api.getDutchieAZStoreSummary(parseInt(id!, 10));
      setSummary(data);
    } catch (error) {
      console.error('Failed to load store summary:', error);
    } finally {
      setLoading(false);
    }
  };

  const loadProducts = async () => {
    if (!id) return;
    setProductsLoading(true);
    try {
      const data = await api.getDutchieAZStoreProducts(parseInt(id, 10), {
        search: searchQuery || undefined,
        stockStatus: stockFilter || undefined,
        limit: itemsPerPage,
        offset: (currentPage - 1) * itemsPerPage,
      });
      setProducts(data.products);
      setTotalProducts(data.total);
    } catch (error) {
      console.error('Failed to load products:', error);
    } finally {
      setProductsLoading(false);
    }
  };

  const handleCrawl = async () => {
    setShowUpdateDropdown(false);
    setIsUpdating(true);
    try {
      await api.triggerDutchieAZCrawl(parseInt(id!, 10));
      alert('Crawl started! Refresh the page in a few minutes to see updated data.');
    } catch (error) {
      console.error('Failed to trigger crawl:', error);
      alert('Failed to start crawl. Please try again.');
    } finally {
      setIsUpdating(false);
    }
  };

  const totalPages = Math.ceil(totalProducts / itemsPerPage);

  if (loading) {
    return (
      <Layout>
        <div className="text-center py-12">
          <div className="inline-block animate-spin rounded-full h-8 w-8 border-4 border-blue-500 border-t-transparent"></div>
          <p className="mt-2 text-sm text-gray-600">Loading store...</p>
        </div>
      </Layout>
    );
  }

  if (!summary) {
    return (
      <Layout>
        <div className="text-center py-12">
          <p className="text-gray-600">Store not found</p>
        </div>
      </Layout>
    );
  }

  const { dispensary, brands, categories, lastCrawl } = summary;

  return (
    <Layout>
      <div className="space-y-6">
        {/* Header */}
        <div className="flex items-center justify-between gap-4">
          <button
            onClick={() => navigate('/az')}
            className="flex items-center gap-2 text-sm text-gray-600 hover:text-gray-900"
          >
            <ArrowLeft className="w-4 h-4" />
            Back to AZ Stores
          </button>

          {/* Update Button */}
          <div className="relative">
            <button
              onClick={() => setShowUpdateDropdown(!showUpdateDropdown)}
              disabled={isUpdating}
              className="flex items-center gap-2 px-4 py-2 text-sm font-medium text-white bg-blue-600 hover:bg-blue-700 rounded-lg disabled:opacity-50 disabled:cursor-not-allowed"
            >
              <RefreshCw className={`w-4 h-4 ${isUpdating ? 'animate-spin' : ''}`} />
              {isUpdating ? 'Crawling...' : 'Crawl Now'}
              {!isUpdating && <ChevronDown className="w-4 h-4" />}
            </button>

            {showUpdateDropdown && !isUpdating && (
              <div className="absolute right-0 mt-2 w-48 bg-white rounded-lg shadow-lg border border-gray-200 z-10">
                <button
                  onClick={handleCrawl}
                  className="w-full text-left px-4 py-2 text-sm text-gray-700 hover:bg-gray-100 rounded-lg"
                >
                  Start Full Crawl
                </button>
              </div>
            )}
          </div>
        </div>

        {/* Store Header */}
        <div className="bg-white rounded-lg border border-gray-200 p-6">
          <div className="flex items-start justify-between gap-4 mb-4">
            <div className="flex items-start gap-4">
              <div className="p-3 bg-blue-50 rounded-lg">
                <Building2 className="w-8 h-8 text-blue-600" />
              </div>
              <div>
                <h1 className="text-2xl font-bold text-gray-900">
                  {dispensary.dba_name || dispensary.name}
                </h1>
                {dispensary.company_name && (
                  <p className="text-sm text-gray-600 mt-1">{dispensary.company_name}</p>
                )}
                <p className="text-xs text-gray-500 mt-1">
                  Platform ID: {dispensary.platform_dispensary_id || 'Not resolved'}
                </p>
              </div>
            </div>
            <div className="flex items-center gap-2 text-sm text-gray-600 bg-gray-50 px-4 py-2 rounded-lg">
              <Clock className="w-4 h-4" />
              <div>
                <span className="font-medium">Last Crawl:</span>
                <span className="ml-2">
                  {lastCrawl?.completed_at
                    ? new Date(lastCrawl.completed_at).toLocaleDateString('en-US', {
                        year: 'numeric',
                        month: 'short',
                        day: 'numeric',
                        hour: '2-digit',
                        minute: '2-digit'
                      })
                    : 'Never'}
                </span>
                {lastCrawl?.status && (
                  <span className={`ml-2 px-2 py-0.5 rounded text-xs ${
                    lastCrawl.status === 'completed' ? 'bg-green-100 text-green-800' :
                    lastCrawl.status === 'failed' ? 'bg-red-100 text-red-800' :
                    'bg-yellow-100 text-yellow-800'
                  }`}>
                    {lastCrawl.status}
                  </span>
                )}
              </div>
            </div>
          </div>
          <div className="flex flex-wrap gap-4">
            {dispensary.address && (
              <div className="flex items-center gap-2 text-sm text-gray-600">
                <MapPin className="w-4 h-4" />
                <span>
                  {dispensary.address}, {dispensary.city}, {dispensary.state} {dispensary.zip}
                </span>
              </div>
            )}
            {dispensary.phone && (
              <div className="flex items-center gap-2 text-sm text-gray-600">
                <Phone className="w-4 h-4" />
                <span>{dispensary.phone}</span>
              </div>
            )}
            {dispensary.website && (
              <a
                href={dispensary.website}
                target="_blank"
                rel="noopener noreferrer"
                className="flex items-center gap-2 text-sm text-blue-600 hover:text-blue-800"
              >
                <ExternalLink className="w-4 h-4" />
                Website
              </a>
            )}
          </div>
        </div>

        {/* Dashboard Metrics */}
        <div className="grid grid-cols-5 gap-4">
          <button
            onClick={() => {
              setActiveTab('products');
              setStockFilter('');
              setSearchQuery('');
            }}
            className={`bg-white rounded-lg border p-4 hover:border-blue-300 hover:shadow-md transition-all cursor-pointer text-left ${
              activeTab === 'products' && !stockFilter ? 'border-blue-500' : 'border-gray-200'
            }`}
          >
            <div className="flex items-center gap-3">
              <div className="p-2 bg-green-50 rounded-lg">
                <Package className="w-5 h-5 text-green-600" />
              </div>
              <div>
                <p className="text-sm text-gray-600">Total Products</p>
                <p className="text-xl font-bold text-gray-900">{summary.totalProducts}</p>
              </div>
            </div>
          </button>

          <button
            onClick={() => {
              setActiveTab('products');
              setStockFilter('in_stock');
              setSearchQuery('');
            }}
            className={`bg-white rounded-lg border p-4 hover:border-blue-300 hover:shadow-md transition-all cursor-pointer text-left ${
              stockFilter === 'in_stock' ? 'border-blue-500' : 'border-gray-200'
            }`}
          >
            <div className="flex items-center gap-3">
              <div className="p-2 bg-emerald-50 rounded-lg">
                <CheckCircle className="w-5 h-5 text-emerald-600" />
              </div>
              <div>
                <p className="text-sm text-gray-600">In Stock</p>
                <p className="text-xl font-bold text-gray-900">{summary.inStockCount}</p>
              </div>
            </div>
          </button>

          <button
            onClick={() => {
              setActiveTab('products');
              setStockFilter('out_of_stock');
              setSearchQuery('');
            }}
            className={`bg-white rounded-lg border p-4 hover:border-blue-300 hover:shadow-md transition-all cursor-pointer text-left ${
              stockFilter === 'out_of_stock' ? 'border-blue-500' : 'border-gray-200'
            }`}
          >
            <div className="flex items-center gap-3">
              <div className="p-2 bg-red-50 rounded-lg">
                <XCircle className="w-5 h-5 text-red-600" />
              </div>
              <div>
                <p className="text-sm text-gray-600">Out of Stock</p>
                <p className="text-xl font-bold text-gray-900">{summary.outOfStockCount}</p>
              </div>
            </div>
          </button>

          <button
            onClick={() => setActiveTab('brands')}
            className={`bg-white rounded-lg border p-4 hover:border-blue-300 hover:shadow-md transition-all cursor-pointer text-left ${
              activeTab === 'brands' ? 'border-blue-500' : 'border-gray-200'
            }`}
          >
            <div className="flex items-center gap-3">
              <div className="p-2 bg-purple-50 rounded-lg">
                <Tag className="w-5 h-5 text-purple-600" />
              </div>
              <div>
                <p className="text-sm text-gray-600">Brands</p>
                <p className="text-xl font-bold text-gray-900">{summary.brandCount}</p>
              </div>
            </div>
          </button>

          <button
            onClick={() => setActiveTab('categories')}
            className={`bg-white rounded-lg border p-4 hover:border-blue-300 hover:shadow-md transition-all cursor-pointer text-left ${
              activeTab === 'categories' ? 'border-blue-500' : 'border-gray-200'
            }`}
          >
            <div className="flex items-center gap-3">
              <div className="p-2 bg-orange-50 rounded-lg">
                <AlertCircle className="w-5 h-5 text-orange-600" />
              </div>
              <div>
                <p className="text-sm text-gray-600">Categories</p>
                <p className="text-xl font-bold text-gray-900">{summary.categoryCount}</p>
              </div>
            </div>
          </button>
        </div>

        {/* Content Tabs */}
        <div className="bg-white rounded-lg border border-gray-200">
          <div className="border-b border-gray-200">
            <div className="flex gap-4 px-6">
              <button
                onClick={() => {
                  setActiveTab('products');
                  setStockFilter('');
                }}
                className={`py-4 px-2 text-sm font-medium border-b-2 ${
                  activeTab === 'products'
                    ? 'border-blue-600 text-blue-600'
                    : 'border-transparent text-gray-600 hover:text-gray-900'
                }`}
              >
                Products ({summary.totalProducts})
              </button>
              <button
                onClick={() => setActiveTab('brands')}
                className={`py-4 px-2 text-sm font-medium border-b-2 ${
                  activeTab === 'brands'
                    ? 'border-blue-600 text-blue-600'
                    : 'border-transparent text-gray-600 hover:text-gray-900'
                }`}
              >
                Brands ({summary.brandCount})
              </button>
              <button
                onClick={() => setActiveTab('categories')}
                className={`py-4 px-2 text-sm font-medium border-b-2 ${
                  activeTab === 'categories'
                    ? 'border-blue-600 text-blue-600'
                    : 'border-transparent text-gray-600 hover:text-gray-900'
                }`}
              >
                Categories ({summary.categoryCount})
              </button>
            </div>
          </div>

          <div className="p-6">
            {activeTab === 'products' && (
              <div className="space-y-4">
                {/* Search and Filter */}
                <div className="flex items-center gap-4 mb-4">
                  <input
                    type="text"
                    placeholder="Search products by name or brand..."
                    value={searchQuery}
                    onChange={(e) => setSearchQuery(e.target.value)}
                    className="input input-bordered input-sm flex-1"
                  />
                  <select
                    value={stockFilter}
                    onChange={(e) => setStockFilter(e.target.value)}
                    className="select select-bordered select-sm"
                  >
                    <option value="">All Stock</option>
                    <option value="in_stock">In Stock</option>
                    <option value="out_of_stock">Out of Stock</option>
                    <option value="unknown">Unknown</option>
                  </select>
                  {(searchQuery || stockFilter) && (
                    <button
                      onClick={() => {
                        setSearchQuery('');
                        setStockFilter('');
                      }}
                      className="btn btn-sm btn-ghost"
                    >
                      Clear
                    </button>
                  )}
                  <div className="text-sm text-gray-600">
                    {totalProducts} products
                  </div>
                </div>

                {productsLoading ? (
                  <div className="text-center py-8">
                    <div className="inline-block animate-spin rounded-full h-6 w-6 border-4 border-blue-500 border-t-transparent"></div>
                    <p className="mt-2 text-sm text-gray-600">Loading products...</p>
                  </div>
                ) : products.length === 0 ? (
                  <p className="text-center py-8 text-gray-500">No products found</p>
                ) : (
                  <>
                    <div className="overflow-x-auto -mx-6 px-6">
                      <table className="table table-xs table-zebra table-pin-rows w-full">
                        <thead>
                          <tr>
                            <th>Image</th>
                            <th>Product Name</th>
                            <th>Brand</th>
                            <th>Type</th>
                            <th className="text-right">Price</th>
                            <th className="text-center">THC %</th>
                            <th className="text-center">Stock</th>
                            <th className="text-center">Qty</th>
                            <th>Last Updated</th>
                          </tr>
                        </thead>
                        <tbody>
                          {products.map((product) => (
                            <tr key={product.id}>
                              <td className="whitespace-nowrap">
                                {product.image_url ? (
                                  <img
                                    src={product.image_url}
                                    alt={product.name}
                                    className="w-12 h-12 object-cover rounded"
                                    onError={(e) => e.currentTarget.style.display = 'none'}
                                  />
                                ) : '-'}
                              </td>
                              <td className="font-medium max-w-[200px]">
                                <div className="line-clamp-2" title={product.name}>{product.name}</div>
                              </td>
                              <td className="max-w-[120px]">
                                <div className="line-clamp-2" title={product.brand || '-'}>{product.brand || '-'}</div>
                              </td>
                              <td className="whitespace-nowrap">
                                <span className="badge badge-ghost badge-sm">{product.type || '-'}</span>
                                {product.subcategory && (
                                  <span className="badge badge-ghost badge-sm ml-1">{product.subcategory}</span>
                                )}
                              </td>
                              <td className="text-right font-semibold whitespace-nowrap">
                                {product.sale_price ? (
                                  <div className="flex flex-col items-end">
                                    <span className="text-error">${product.sale_price}</span>
                                    <span className="text-gray-400 line-through text-xs">${product.regular_price}</span>
                                  </div>
                                ) : product.regular_price ? (
                                  `$${product.regular_price}`
                                ) : '-'}
                              </td>
                              <td className="text-center whitespace-nowrap">
                                {product.thc_percentage ? (
                                  <span className="badge badge-success badge-sm">{product.thc_percentage}%</span>
                                ) : '-'}
                              </td>
                              <td className="text-center whitespace-nowrap">
                                {product.stock_status === 'in_stock' ? (
                                  <span className="badge badge-success badge-sm">In Stock</span>
                                ) : product.stock_status === 'out_of_stock' ? (
                                  <span className="badge badge-error badge-sm">Out</span>
                                ) : (
                                  <span className="badge badge-warning badge-sm">Unknown</span>
                                )}
                              </td>
                              <td className="text-center whitespace-nowrap">
                                {product.total_quantity != null ? product.total_quantity : '-'}
                              </td>
                              <td className="whitespace-nowrap text-xs text-gray-500">
                                {product.updated_at ? formatDate(product.updated_at) : '-'}
                              </td>
                            </tr>
                          ))}
                        </tbody>
                      </table>
                    </div>

                    {/* Pagination */}
                    {totalPages > 1 && (
                      <div className="flex justify-center items-center gap-2 mt-4">
                        <button
                          onClick={() => setCurrentPage(prev => Math.max(1, prev - 1))}
                          disabled={currentPage === 1}
                          className="btn btn-sm btn-outline"
                        >
                          Previous
                        </button>

                        <div className="flex gap-1">
                          {Array.from({ length: Math.min(5, totalPages) }, (_, i) => {
                            let page: number;
                            if (totalPages <= 5) {
                              page = i + 1;
                            } else if (currentPage <= 3) {
                              page = i + 1;
                            } else if (currentPage >= totalPages - 2) {
                              page = totalPages - 4 + i;
                            } else {
                              page = currentPage - 2 + i;
                            }
                            return (
                              <button
                                key={page}
                                onClick={() => setCurrentPage(page)}
                                className={`btn btn-sm ${
                                  currentPage === page ? 'btn-primary' : 'btn-outline'
                                }`}
                              >
                                {page}
                              </button>
                            );
                          })}
                        </div>

                        <button
                          onClick={() => setCurrentPage(prev => Math.min(totalPages, prev + 1))}
                          disabled={currentPage === totalPages}
                          className="btn btn-sm btn-outline"
                        >
                          Next
                        </button>
                      </div>
                    )}
                  </>
                )}
              </div>
            )}

            {activeTab === 'brands' && (
              <div className="space-y-4">
                {brands.length === 0 ? (
                  <p className="text-center py-8 text-gray-500">No brands found</p>
                ) : (
                  <div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-4">
                    {brands.map((brand: any) => (
                      <button
                        key={brand.brand_name}
                        onClick={() => {
                          setActiveTab('products');
                          setSearchQuery(brand.brand_name);
                          setStockFilter('');
                        }}
                        className="border border-gray-200 rounded-lg p-4 text-center hover:border-blue-300 hover:shadow-md transition-all cursor-pointer"
                      >
                        <p className="font-medium text-gray-900 line-clamp-2">{brand.brand_name}</p>
                        <p className="text-sm text-gray-600 mt-1">
                          {brand.product_count} product{brand.product_count !== 1 ? 's' : ''}
                        </p>
                      </button>
                    ))}
                  </div>
                )}
              </div>
            )}

            {activeTab === 'categories' && (
              <div className="space-y-4">
                {categories.length === 0 ? (
                  <p className="text-center py-8 text-gray-500">No categories found</p>
                ) : (
                  <div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-4">
                    {categories.map((cat: any, idx: number) => (
                      <div
                        key={idx}
                        className="border border-gray-200 rounded-lg p-4 text-center"
                      >
                        <p className="font-medium text-gray-900">{cat.type}</p>
                        {cat.subcategory && (
                          <p className="text-sm text-gray-600">{cat.subcategory}</p>
                        )}
                        <p className="text-sm text-gray-500 mt-1">
                          {cat.product_count} product{cat.product_count !== 1 ? 's' : ''}
                        </p>
                      </div>
                    ))}
                  </div>
                )}
              </div>
            )}
          </div>
        </div>
      </div>
    </Layout>
  );
}