'use client';

import { Package, Search, X } from 'lucide-react';
import * as React from 'react';
import { TransferListingCard } from '@/components/chuyen-nhuong/transfer-listing-card';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import {
  type SearchTransferListingsParams,
  type TransferCategory,
  type TransferListingStatus,
  CATEGORY_ICONS,
  CATEGORY_LABELS,
  STATUS_LABELS,
} from '@/lib/chuyen-nhuong-api';
import { useTransferListingsSearch } from '@/lib/hooks/use-chuyen-nhuong';

const PAGE_SIZE = 12;

const DISTRICTS = [
  'Quận 1', 'Quận 2', 'Quận 3', 'Quận 4', 'Quận 5', 'Quận 6', 'Quận 7',
  'Quận 8', 'Quận 9', 'Quận 10', 'Quận 11', 'Quận 12', 'Bình Thạnh',
  'Gò Vấp', 'Phú Nhuận', 'Tân Bình', 'Tân Phú', 'Thủ Đức',
];

export default function ChuyenNhuongPage() {
  const [filters, setFilters] = React.useState<SearchTransferListingsParams>({
    page: 1,
    limit: PAGE_SIZE,
  });
  const [searchInput, setSearchInput] = React.useState('');

  const { data, isLoading, isError } = useTransferListingsSearch(filters);

  const handleSearch = (e: React.FormEvent) => {
    e.preventDefault();
    setFilters((prev) => ({ ...prev, q: searchInput.trim() || undefined, page: 1 }));
    window.scrollTo({ top: 0, behavior: 'smooth' });
  };

  const handleCategoryChange = (category: TransferCategory | undefined) => {
    setFilters((prev) => ({ ...prev, category, page: 1 }));
    window.scrollTo({ top: 0, behavior: 'smooth' });
  };

  const updateFilter = (key: keyof SearchTransferListingsParams, value: string) => {
    setFilters((prev) => ({ ...prev, [key]: value || undefined, page: 1 }));
  };

  const handlePageChange = (page: number) => {
    setFilters((prev) => ({ ...prev, page }));
    window.scrollTo({ top: 0, behavior: 'smooth' });
  };

  const handleClear = () => {
    setSearchInput('');
    setFilters({ page: 1, limit: PAGE_SIZE });
  };

  const hasFilters = filters.q || filters.category || filters.status || filters.district;

  return (
    <div className="mx-auto max-w-7xl px-4 py-6">
      {/* Page header */}
      <div className="mb-6">
        <h1 className="text-2xl font-bold md:text-3xl">Chuyển Nhượng</h1>
        <p className="mt-1 text-muted-foreground">
          Tìm kiếm nội thất, thiết bị và mặt bằng chuyển nhượng
        </p>
      </div>

      {/* Search bar */}
      <div className="space-y-3">
        <form onSubmit={handleSearch} className="flex gap-2">
          <div className="relative flex-1">
            <Search className="absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
            <Input
              placeholder="Tìm kiếm theo tên, quận, loại hình..."
              value={searchInput}
              onChange={(e) => setSearchInput(e.target.value)}
              className="pl-9"
            />
          </div>
          <Button type="submit" size="sm">Tìm</Button>
        </form>

        {/* Filters */}
        <div className="flex flex-wrap gap-2">
          <select
            value={filters.district ?? ''}
            onChange={(e) => updateFilter('district', e.target.value)}
            className="rounded-md border bg-background px-3 py-1.5 text-sm"
            aria-label="Quận/Huyện"
          >
            <option value="">Quận/Huyện</option>
            {DISTRICTS.map((d) => (
              <option key={d} value={d}>{d}</option>
            ))}
          </select>

          <select
            value={filters.status ?? ''}
            onChange={(e) => updateFilter('status', e.target.value)}
            className="rounded-md border bg-background px-3 py-1.5 text-sm"
            aria-label="Trạng thái"
          >
            <option value="">Trạng thái</option>
            {(Object.entries(STATUS_LABELS) as [TransferListingStatus, string][]).map(([value, label]) => (
              <option key={value} value={value}>{label}</option>
            ))}
          </select>

          {hasFilters && (
            <Button variant="ghost" size="sm" onClick={handleClear} className="gap-1">
              <X className="h-3.5 w-3.5" />
              Xóa bộ lọc
            </Button>
          )}
        </div>
      </div>

      {/* Category tabs */}
      <div className="mt-4 flex gap-1 overflow-x-auto border-b" role="tablist">
        <button
          role="tab"
          aria-selected={!filters.category}
          className={`shrink-0 border-b-2 px-4 py-2 text-sm font-medium transition-colors ${
            !filters.category
              ? 'border-primary text-primary'
              : 'border-transparent text-muted-foreground hover:text-foreground'
          }`}
          onClick={() => handleCategoryChange(undefined)}
        >
          Tất cả
        </button>
        {(Object.entries(CATEGORY_LABELS) as [TransferCategory, string][]).map(([key, label]) => (
          <button
            key={key}
            role="tab"
            aria-selected={filters.category === key}
            className={`shrink-0 border-b-2 px-4 py-2 text-sm font-medium transition-colors ${
              filters.category === key
                ? 'border-primary text-primary'
                : 'border-transparent text-muted-foreground hover:text-foreground'
            }`}
            onClick={() => handleCategoryChange(key)}
          >
            {CATEGORY_ICONS[key]} {label}
          </button>
        ))}
      </div>

      {/* Results */}
      <div className="mt-6">
        {isLoading ? (
          <div className="grid gap-6 sm:grid-cols-2 lg:grid-cols-3">
            {Array.from({ length: 6 }).map((_, i) => (
              <div
                key={i}
                className="h-72 animate-pulse rounded-lg bg-muted"
              />
            ))}
          </div>
        ) : isError ? (
          <div className="py-12 text-center">
            <p className="text-muted-foreground">
              Không thể tải danh sách chuyển nhượng. Vui lòng thử lại.
            </p>
            <Button
              variant="outline"
              className="mt-4"
              onClick={() => setFilters({ ...filters })}
            >
              Thử lại
            </Button>
          </div>
        ) : data && data.data.length > 0 ? (
          <>
            <p className="mb-4 text-sm text-muted-foreground">
              {data.total} tin chuyển nhượng được tìm thấy
            </p>

            <div className="grid gap-6 sm:grid-cols-2 lg:grid-cols-3">
              {data.data.map((listing) => (
                <TransferListingCard key={listing.id} listing={listing} />
              ))}
            </div>

            {/* Pagination */}
            {data.totalPages > 1 && (
              <div className="mt-8 flex items-center justify-center gap-2">
                <Button
                  variant="outline"
                  size="sm"
                  disabled={filters.page === 1}
                  onClick={() => handlePageChange((filters.page || 1) - 1)}
                >
                  Trước
                </Button>
                <span className="text-sm text-muted-foreground">
                  Trang {data.page} / {data.totalPages}
                </span>
                <Button
                  variant="outline"
                  size="sm"
                  disabled={data.page >= data.totalPages}
                  onClick={() => handlePageChange((filters.page || 1) + 1)}
                >
                  Sau
                </Button>
              </div>
            )}
          </>
        ) : (
          <div className="py-12 text-center">
            <Package className="mx-auto h-12 w-12 text-muted-foreground/30" />
            <p className="mt-4 text-lg font-medium">Không tìm thấy tin chuyển nhượng</p>
            <p className="mt-1 text-sm text-muted-foreground">
              Thử thay đổi bộ lọc để tìm kiếm nhiều hơn
            </p>
          </div>
        )}
      </div>
    </div>
  );
}