import { Card, FormField } from '@/components/ui';
import Button from '@/components/ui/Button';
import Flex from '@/components/ui/Flex';
import Grid from '@/components/ui/Grid';
import Input from '@/components/ui/Input';
import Select from '@/components/ui/Select';
import Stack from '@/components/ui/Stack';
import { useTranslation } from '@/hooks/useI18n';
import { getCategories, type SearchQuery } from '@/services/discovery-api';
import { useQuery } from '@tanstack/react-query';
import { Filter, MapPin, Search } from 'lucide-react';
import React, { useMemo, useState } from 'react';

interface DiscoverySearchBarProps {
  onSearch: (query: SearchQuery) => void;
  initialQuery?: SearchQuery;
  showFilters?: boolean;
}

export default function DiscoverySearchBar({
  onSearch,
  initialQuery,
  showFilters = true,
}: DiscoverySearchBarProps) {
  const { t } = useTranslation();
  const [query, setQuery] = useState(initialQuery?.query || '');
  const [category, setCategory] = useState(initialQuery?.categories?.[0] || '');
  const [radius, setRadius] = useState(initialQuery?.radius_km?.toString() || '50');
  const [showAdvanced, setShowAdvanced] = useState(false);

  // Fetch categories from backend
  const { data: categoriesData, isLoading: categoriesLoading } = useQuery({
    queryKey: ['discovery-categories'],
    queryFn: getCategories,
    staleTime: 1000 * 60 * 60, // Cache for 1 hour
  });

  // Combine all categories for the dropdown
  const allCategories = useMemo(() => {
    if (!categoriesData) return [];
    // Combine all category types, removing duplicates
    const combined = [
      ...categoriesData.products,
      ...categoriesData.services,
      ...categoriesData.community,
    ];
    // Remove duplicates and sort
    return Array.from(new Set(combined)).sort();
  }, [categoriesData]);

  const handleSearch = () => {
    const searchQuery: SearchQuery = {
      query: query || undefined,
      categories: category ? [category] : undefined,
      radius_km: radius ? parseFloat(radius) : undefined,
      limit: 20,
    };

    // Try to get user location if available
    if (navigator.geolocation) {
      navigator.geolocation.getCurrentPosition(
        (position) => {
          searchQuery.latitude = position.coords.latitude;
          searchQuery.longitude = position.coords.longitude;
          onSearch(searchQuery);
        },
        () => {
          // Location denied or unavailable, search without location
          onSearch(searchQuery);
        }
      );
    } else {
      onSearch(searchQuery);
    }
  };

  const handleKeyPress = (e: React.KeyboardEvent<HTMLInputElement>) => {
    if (e.key === 'Enter') {
      handleSearch();
    }
  };

  return (
    <Stack className="w-full">
      <Flex gap="sm">
        <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
            type="text"
            placeholder={t('discoveryPage.searchPlaceholder')}
            value={query}
            onChange={(e) => setQuery(e.target.value)}
            onKeyPress={handleKeyPress}
            className="pl-10"
          />
        </div>
        <Button onClick={handleSearch} size="default">
          {t('discoveryPage.searchButton')}
        </Button>
      </Flex>

      {showFilters && (
        <Flex wrap="wrap" gap="sm">
          <Select
            value={category}
            onChange={(e) => setCategory(e.target.value)}
            className="w-[180px]"
            disabled={categoriesLoading}
          >
            <option value="">{t('discoveryPage.allCategories')}</option>
            {categoriesLoading ? (
              <option value="" disabled>
                Loading...
              </option>
            ) : (
              allCategories.map((cat) => (
                <option key={cat} value={cat}>
                  {cat.charAt(0).toUpperCase() + cat.slice(1).replace(/_/g, ' ')}
                </option>
              ))
            )}
          </Select>

          <div className="relative flex-1 min-w-[120px]">
            <MapPin className="absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
            <Input
              type="number"
              placeholder={t('discoveryPage.radius')}
              value={radius}
              onChange={(e) => setRadius(e.target.value)}
              className="pl-10"
            />
          </div>

          <Button variant="outline" size="sm" onClick={() => setShowAdvanced(!showAdvanced)}>
            <Filter className="mr-2 h-4 w-4" />
            {t('discoveryPage.filters')}
          </Button>
        </Flex>
      )}

      {showAdvanced && showFilters && (
        <Card className="p-4">
          <Stack spacing="sm">
            <Grid cols={2} gap="md">
              <FormField label={t('discoveryPage.minPrice')}>
                <Input
                  type="number"
                  placeholder="0"
                  value={initialQuery?.min_price?.toString() || ''}
                />
              </FormField>
              <FormField label={t('discoveryPage.maxPrice')}>
                <Input
                  type="number"
                  placeholder="1000"
                  value={initialQuery?.max_price?.toString() || ''}
                />
              </FormField>
            </Grid>
            <FormField label={t('discoveryPage.availability')}>
              <Select defaultValue={initialQuery?.availability_status || ''}>
                <option value="">{t('discoveryPage.any')}</option>
                <option value="available">{t('discoveryPage.available')}</option>
                <option value="limited">{t('discoveryPage.limited')}</option>
                <option value="out_of_stock">{t('discoveryPage.outOfStock')}</option>
              </Select>
            </FormField>
          </Stack>
        </Card>
      )}
    </Stack>
  );
}