import DiscoverySearchBar from '@/components/discovery/DiscoverySearchBar';
import MatchCardImage from '@/components/discovery/MatchCardImage';
import MatchCardMetadata from '@/components/discovery/MatchCardMetadata';
import MatchCardPricing from '@/components/discovery/MatchCardPricing';
import { MainLayout } from '@/components/layout/MainLayout';
import Badge from '@/components/ui/Badge';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/Card';
import { EmptyState } from '@/components/ui/EmptyState';
import Flex from '@/components/ui/Flex';
import Grid from '@/components/ui/Grid';
import { Container } from '@/components/ui/layout';
import { LoadingState } from '@/components/ui/LoadingState';
import Stack from '@/components/ui/Stack';
import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/Tabs';
import { Heading, Text } from '@/components/ui/Typography';
import { useTranslation } from '@/hooks/useI18n';
import { useNavigation } from '@/hooks/useNavigation';
import { universalSearch, type DiscoveryMatch, type SearchQuery } from '@/services/discovery-api';
import { MapPin, Package, Users, Wrench } from 'lucide-react';
import { useEffect, useState } from 'react';
import { useSearchParams } from 'react-router-dom';

export default function DiscoveryPage() {
  const { t } = useTranslation();
  const { handleFooterNavigate } = useNavigation();
  const [searchParams, setSearchParams] = useSearchParams();
  const [loading, setLoading] = useState(false);
  const [hasSearched, setHasSearched] = useState(false);
  const [hasActiveSearch, setHasActiveSearch] = useState(false); // Track if there's an actual search query
  const [activeTab, setActiveTab] = useState('all');
  const [results, setResults] = useState<{
    products: DiscoveryMatch[];
    services: DiscoveryMatch[];
    community: DiscoveryMatch[];
  }>({
    products: [],
    services: [],
    community: [],
  });

  const initialQuery: SearchQuery = {
    query: searchParams.get('q') || undefined,
    categories: searchParams.get('category') ? [searchParams.get('category')!] : undefined,
    radius_km: searchParams.get('radius') ? parseFloat(searchParams.get('radius')!) : undefined,
    limit: 20,
  };

  const handleSearch = async (query: SearchQuery) => {
    setLoading(true);
    try {
      const response = await universalSearch(query);
      setResults({
        products: response.product_matches || [],
        services: response.service_matches || [],
        community: response.community_matches || [],
      });
      setHasSearched(true);

      // Determine if this is an actual search (has query, category, or filters) vs just browsing
      const isActiveSearch = !!(
        query.query?.trim() ||
        query.categories?.length ||
        query.min_price != null ||
        query.max_price != null ||
        query.availability_status ||
        query.tags?.length
      );
      setHasActiveSearch(isActiveSearch);

      // Update URL params
      const newParams = new URLSearchParams();
      if (query.query) newParams.set('q', query.query);
      if (query.categories?.[0]) newParams.set('category', query.categories[0]);
      if (query.radius_km) newParams.set('radius', query.radius_km.toString());
      setSearchParams(newParams);
    } catch (error) {
      console.error('Search failed:', error);
      setHasSearched(true);
      setHasActiveSearch(false);
    } finally {
      setLoading(false);
    }
  };

  useEffect(() => {
    // Perform initial search on page load
    // If query params exist, use them; otherwise perform a default browse to show available listings
    if (searchParams.get('q') || searchParams.get('category')) {
      handleSearch(initialQuery);
    } else {
      // Browse mode: show available listings without search filters
      // This is not a "search" so hasActiveSearch will be false
      handleSearch({ limit: 20 });
    }
  }, []);

  const renderMatchCard = (match: DiscoveryMatch) => {
    const item = match.product || match.service || match.community_listing;
    if (!item) return null;

    const isProduct = !!match.product;
    const isService = !!match.service;
    const isCommunity = !!match.community_listing;

    // Get organization information
    const orgName = match.organization?.name || '';

    // Get images
    const images = isProduct
      ? match.product?.Images
      : isService
        ? []
        : match.community_listing?.images || [];
    const hasImage = images && images.length > 0;

    // Get item ID
    const itemId = isProduct
      ? match.product?.ID
      : isService
        ? match.service?.ID
        : match.community_listing?.id || Math.random().toString();

    // Get category
    const category = isProduct
      ? match.product?.Category
      : isService
        ? match.service?.Type
        : match.community_listing?.category;

    // Get title
    const title = isProduct
      ? match.product?.Name
      : isService
        ? match.service?.Domain
        : match.community_listing?.title;

    // Get description
    const description = isProduct
      ? match.product?.Description
      : isService
        ? match.service?.Description
        : match.community_listing?.description;

    // Get availability status
    const availabilityStatus = isProduct
      ? match.product?.AvailabilityStatus
      : isService
        ? match.service?.AvailabilityStatus
        : match.community_listing?.availability_status;

    // Get tags
    const tags = isProduct
      ? match.product?.Tags || []
      : isService
        ? match.service?.Tags || []
        : match.community_listing?.tags || [];

    return (
      <Card
        key={match.match_type + '-' + itemId}
        className="hover:shadow-lg transition-shadow overflow-hidden"
      >
        {/* Product/Service Image */}
        {hasImage && <MatchCardImage imageUrl={images[0]} alt={title || 'Product image'} />}

        <CardHeader>
          <Flex justify="between" align="start" gap="sm">
            <div className="flex-1 min-w-0">
              {/* Category Badge */}
              {category && (
                <div className="mb-2">
                  <Badge variant="outline" className="text-xs">
                    {category}
                  </Badge>
                </div>
              )}

              {/* Title */}
              <CardTitle className="text-lg mb-1">{title}</CardTitle>

              {/* Description */}
              {description && (
                <CardDescription className="line-clamp-2 text-sm">{description}</CardDescription>
              )}
            </div>
            {hasActiveSearch && (
              <Badge variant="secondary" className="ml-2 shrink-0">
                {t('discoveryPage.match', { score: Math.round(match.relevance_score * 100) })}
              </Badge>
            )}
          </Flex>
        </CardHeader>

        <CardContent>
          <Stack spacing="md">
            {/* Pricing */}
            {isProduct && match.product && (
              <MatchCardPricing
                type="product"
                unitPrice={match.product.UnitPrice ?? null}
                moq={match.product.MOQ}
                onRequestTKey="discoveryPage.priceOnRequest"
              />
            )}

            {isService && match.service && (
              <MatchCardPricing
                type="service"
                hourlyRate={match.service.HourlyRate ?? null}
                serviceAreaKm={match.service.ServiceAreaKm}
                onRequestTKey="discoveryPage.priceOnRequest"
              />
            )}

            {isCommunity && match.community_listing && (
              <MatchCardPricing
                type="community"
                price={match.community_listing.price ?? null}
                priceType={match.community_listing.price_type}
                freeTKey="discoveryPage.free"
              />
            )}

            {/* Metadata */}
            <MatchCardMetadata
              organizationName={orgName}
              distanceKm={match.distance_km}
              availabilityStatus={availabilityStatus}
              tags={tags}
              organizationLabelTKey={t('discoveryPage.organization')}
              distanceTKey="discoveryPage.distance"
            />
          </Stack>
        </CardContent>
      </Card>
    );
  };

  return (
    <MainLayout onNavigate={handleFooterNavigate}>
      <Container size="2xl" className="py-8">
        <div className="mb-8">
          <Heading level="h1" tKey="discoveryPage.title" className="mb-2" />
          <Text variant="muted" tKey="discoveryPage.subtitle" />
        </div>

        <div className="mb-6">
          <DiscoverySearchBar onSearch={handleSearch} initialQuery={initialQuery} />
        </div>

        {loading ? (
          <LoadingState message={t('discoveryPage.loading')} size="lg" />
        ) : (
          <Tabs value={activeTab} onValueChange={setActiveTab} className="w-full">
            <TabsList>
              <TabsTrigger value="all">
                {t('discoveryPage.tabs.all')} (
                {results.products.length + results.services.length + results.community.length})
              </TabsTrigger>
              <TabsTrigger value="products">
                <Package className="h-4 w-4 mr-2" />
                {t('discoveryPage.tabs.products')} ({results.products.length})
              </TabsTrigger>
              <TabsTrigger value="services">
                <Wrench className="h-4 w-4 mr-2" />
                {t('discoveryPage.tabs.services')} ({results.services.length})
              </TabsTrigger>
              <TabsTrigger value="community">
                <Users className="h-4 w-4 mr-2" />
                {t('discoveryPage.tabs.community')} ({results.community.length})
              </TabsTrigger>
            </TabsList>

            <TabsContent value="all" className="mt-6">
              <Grid cols={{ sm: 1, md: 2, lg: 3 }} gap="md">
                {[...results.products, ...results.services, ...results.community]
                  .sort((a, b) => {
                    // When browsing (no active search), don't sort by relevance score
                    // When searching, sort by relevance score (higher = better match)
                    if (hasActiveSearch) {
                      return b.relevance_score - a.relevance_score;
                    }
                    // For browsing, maintain original order or sort by date/name
                    return 0;
                  })
                  .map((match) => renderMatchCard(match))}
              </Grid>
              {hasSearched &&
                results.products.length === 0 &&
                results.services.length === 0 &&
                results.community.length === 0 && (
                  <EmptyState type="search" title={t('discoveryPage.results.noResults')} />
                )}
            </TabsContent>

            <TabsContent value="products" className="mt-6">
              <Grid cols={{ sm: 1, md: 2, lg: 3 }} gap="md">
                {results.products.map((match) => renderMatchCard(match))}
              </Grid>
              {results.products.length === 0 && (
                <EmptyState type="no-data" title={t('discoveryPage.results.noProducts')} />
              )}
            </TabsContent>

            <TabsContent value="services" className="mt-6">
              <Grid cols={{ sm: 1, md: 2, lg: 3 }} gap="md">
                {results.services.map((match) => renderMatchCard(match))}
              </Grid>
              {results.services.length === 0 && (
                <EmptyState type="no-data" title={t('discoveryPage.results.noServices')} />
              )}
            </TabsContent>

            <TabsContent value="community" className="mt-6">
              <Grid cols={{ sm: 1, md: 2, lg: 3 }} gap="md">
                {results.community.map((match) => renderMatchCard(match))}
              </Grid>
              {results.community.length === 0 && (
                <EmptyState type="no-data" title={t('discoveryPage.results.noCommunity')} />
              )}
            </TabsContent>
          </Tabs>
        )}
      </Container>
    </MainLayout>
  );
}