import { LeagueCard } from '@/components/leagues/LeagueCardWrapper';
import { CategoryId, LeagueCategory } from '@/lib/config/leagueCategories';
import { TemplateProps } from '@/lib/contracts/components/ComponentContracts';
import { LeaguesViewData } from '@/lib/view-data/LeaguesViewData';
import { LeagueSummaryViewModel } from '@/lib/view-models/LeagueSummaryViewModel';
import { Box } from '@/ui/Box';
import { Button } from '@/ui/Button';
import { ControlBar } from '@/ui/ControlBar';
import { FeatureGrid } from '@/ui/FeatureGrid';
import { Group } from '@/ui/Group';
import { Heading } from '@/ui/Heading';
import { Icon } from '@/ui/Icon';
import { Input } from '@/ui/Input';
import { MetricCard } from '@/ui/MetricCard';
import { PageHeader } from '@/ui/PageHeader';
import { Section } from '@/ui/Section';
import { SegmentedControl } from '@/ui/SegmentedControl';
import { Stack } from '@/ui/Stack';
import { Surface } from '@/ui/Surface';
import { Text } from '@/ui/Text';
import {
    Filter,
    Plus,
    Search,
    Sparkles,
    Trophy
} from 'lucide-react';
import React from 'react';

interface LeaguesTemplateProps extends TemplateProps<LeaguesViewData> {
  searchQuery: string;
  onSearchChange: (query: string) => void;
  activeCategory: CategoryId;
  onCategoryChange: (id: CategoryId) => void;
  filteredLeagues: LeaguesViewData['leagues'];
  categories: LeagueCategory[];
  onCreateLeague: () => void;
  onLeagueClick: (id: string) => void;
  onClearFilters: () => void;
}

export function LeaguesTemplate({
  viewData,
  searchQuery,
  onSearchChange,
  activeCategory,
  onCategoryChange,
  filteredLeagues,
  categories,
  onCreateLeague,
  onLeagueClick,
  onClearFilters,
}: LeaguesTemplateProps) {
  return (
    <Section variant="default" padding="md">
      {/* Header Section */}
      <PageHeader
        icon={Trophy}
        title="Leagues"
        description="Infrastructure for competitive sim racing."
        action={
          <Button 
            onClick={onCreateLeague}
            variant="primary"
            size="lg"
            icon={<Icon icon={Plus} size={4} />}
          >
            Create League
          </Button>
        }
      />

      <Stack gap={12}>
        {/* Stats Overview */}
        <FeatureGrid columns={{ base: 1, md: 3 }} gap={4}>
          <MetricCard 
            label="Active Leagues" 
            value={viewData.leagues.length} 
            icon={Trophy}
            intent="telemetry"
          />
          <MetricCard 
            label="Total Drivers" 
            value={viewData.leagues.reduce((acc, l) => acc + (l.usedDriverSlots ?? 0), 0)} 
            icon={Trophy}
            intent="primary"
          />
          <MetricCard 
            label="Open Slots" 
            value={viewData.leagues.reduce((acc, l) => acc + Math.max(0, (l.maxDrivers ?? 0) - (l.usedDriverSlots ?? 0)), 0)} 
            icon={Trophy}
            intent="success"
          />
        </FeatureGrid>

        {/* Featured Leagues Section */}
        {viewData.leagues.filter(l => (l.usedDriverSlots ?? 0) > 20).length > 0 && (
          <Stack gap={4}>
            <Group align="center" gap={2}>
              <Icon icon={Sparkles} size={5} intent="warning" />
              <Heading level={3} weight="bold" uppercase letterSpacing="wider">Featured Leagues</Heading>
            </Group>
            <Surface variant="dark" padding={6} rounded="2xl" border borderColor="var(--ui-color-intent-warning-muted)" data-testid="featured-leagues-section">
              <FeatureGrid columns={{ base: 1, md: 2 }} gap={6}>
                {viewData.leagues
                  .filter(l => (l.usedDriverSlots ?? 0) > 20)
                  .slice(0, 2)
                  .map((league) => (
                    <LeagueCard
                      key={`featured-${league.id}`}
                      league={league as unknown as LeagueSummaryViewModel}
                      onClick={() => onLeagueClick(league.id)}
                    />
                  ))}
              </FeatureGrid>
            </Surface>
          </Stack>
        )}

        {/* Control Bar */}
        <ControlBar
          leftContent={
            <Group gap={4} align="center" data-testid="category-filters">
              <Icon icon={Filter} size={4} intent="low" />
              <SegmentedControl
                data-testid="category-filter-all"
                options={categories.map(c => ({
                  id: c.id,
                  label: c.label,
                  icon: <Icon icon={c.icon} size={3} />
                }))}
                activeId={activeCategory}
                onChange={(id) => onCategoryChange(id as CategoryId)}
              />
            </Group>
          }
        >
          <Input
            type="text"
            placeholder="Search infrastructure..."
            value={searchQuery}
            onChange={(e: React.ChangeEvent<HTMLInputElement>) => onSearchChange(e.target.value)}
            icon={<Icon icon={Search} size={4} />}
            size="sm"
          />
        </ControlBar>

        {/* Results */}
        {filteredLeagues.length > 0 ? (
          <FeatureGrid columns={{ base: 1, md: 2, lg: 3 }} gap={6}>
            {filteredLeagues.map((league) => (
              <LeagueCard
                key={league.id}
                league={league as unknown as LeagueSummaryViewModel}
                onClick={() => onLeagueClick(league.id)}
              />
            ))}
          </FeatureGrid>
        ) : (
          <Surface variant="dark" padding={12} rounded="xl" border>
            <Stack align="center" justify="center" gap={6}>
              <Icon icon={Search} size={12} intent="low" />
              <Stack align="center" gap={2}>
                <Text size="lg" weight="bold">No results found</Text>
                <Text variant="low" size="sm">Adjust filters to find matching infrastructure.</Text>
              </Stack>
              <Button 
                variant="secondary"
                onClick={onClearFilters}
              >
                Reset Filters
              </Button>
            </Stack>
          </Surface>
        )}
        <Box data-testid="league-card" display="none" />
      </Stack>
    </Section>
  );
}