'use client';

import React from 'react';
import Breadcrumbs from '@/components/layout/Breadcrumbs';
import { Button } from '@/ui/Button';
import { Box } from '@/ui/Box';
import { Stack } from '@/ui/Stack';
import { Text } from '@/ui/Text';
import { Container } from '@/ui/Container';
import { Icon } from '@/ui/Icon';
import { Grid } from '@/ui/Grid';
import { GridItem } from '@/ui/GridItem';
import { Skeleton } from '@/ui/Skeleton';
import { InfoBox } from '@/ui/InfoBox';
import { RaceJoinButton } from '@/components/races/RaceJoinButton';
import { RaceHero } from '@/components/races/RaceHero';
import { RaceUserResult } from '@/components/races/RaceUserResult';
import { RaceEntryList } from '@/components/races/RaceEntryList';
import { RaceDetailCard } from '@/components/races/RaceDetailCard';
import { LeagueSummaryCard } from '@/components/leagues/LeagueSummaryCard';
import {
  AlertTriangle,
  ArrowLeft,
  CheckCircle2,
  Clock,
  PlayCircle,
  Trophy,
  XCircle,
  Scale,
} from 'lucide-react';
import { Surface } from '@/ui/Surface';
import { Card } from '@/ui/Card';

export interface RaceDetailEntryViewModel {
  id: string;
  name: string;
  avatarUrl: string;
  country: string;
  rating?: number | null;
  isCurrentUser: boolean;
}

export interface RaceDetailUserResultViewModel {
  position: number;
  startPosition: number;
  positionChange: number;
  incidents: number;
  isClean: boolean;
  isPodium: boolean;
  ratingChange?: number;
}

export interface RaceDetailLeague {
  id: string;
  name: string;
  description?: string;
  settings: {
    maxDrivers: number;
    qualifyingFormat: string;
  };
}

export interface RaceDetailRace {
  id: string;
  track: string;
  car: string;
  scheduledAt: string;
  status: 'scheduled' | 'running' | 'completed' | 'cancelled';
  sessionType: string;
}

export interface RaceDetailRegistration {
  isUserRegistered: boolean;
  canRegister: boolean;
}

export interface RaceDetailViewData {
  race: RaceDetailRace;
  league?: RaceDetailLeague;
  entryList: RaceDetailEntryViewModel[];
  registration: RaceDetailRegistration;
  userResult?: RaceDetailUserResultViewModel;
  canReopenRace: boolean;
}

export interface RaceDetailTemplateProps {
  viewData?: RaceDetailViewData;
  isLoading: boolean;
  error?: Error | null;
  // Actions
  onBack: () => void;
  onRegister: () => void;
  onWithdraw: () => void;
  onCancel: () => void;
  onReopen: () => void;
  onEndRace: () => void;
  onFileProtest: () => void;
  onResultsClick: () => void;
  onStewardingClick: () => void;
  onLeagueClick: (leagueId: string) => void;
  onDriverClick: (driverId: string) => void;
  // User state
  currentDriverId?: string;
  isOwnerOrAdmin?: boolean;
  // UI State
  animatedRatingChange: number;
  // Loading states
  mutationLoading?: {
    register?: boolean;
    withdraw?: boolean;
    cancel?: boolean;
    reopen?: boolean;
    complete?: boolean;
  };
}

export function RaceDetailTemplate({
  viewData,
  isLoading,
  error,
  onBack,
  onRegister,
  onWithdraw,
  onCancel,
  onReopen,
  onEndRace,
  onFileProtest,
  onResultsClick,
  onStewardingClick,
  onDriverClick,
  isOwnerOrAdmin = false,
  animatedRatingChange,
  mutationLoading = {},
}: RaceDetailTemplateProps) {
  if (isLoading) {
    return (
      <Container size="lg" py={8}>
        <Stack gap={6}>
          <Skeleton width="8rem" height="1.5rem" />
          <Skeleton width="100%" height="12rem" />
          <Grid cols={3} gap={6}>
            <GridItem colSpan={2}>
              <Skeleton width="100%" height="16rem" />
            </GridItem>
            <Skeleton width="100%" height="16rem" />
          </Grid>
        </Stack>
      </Container>
    );
  }

  if (error || !viewData || !viewData.race) {
    return (
      <Container size="md" py={8}>
        <Stack gap={6}>
          <Breadcrumbs items={[{ label: 'Races', href: '/races' }, { label: 'Error' }]} />

          <Card>
            <Stack align="center" gap={4} py={12}>
              <Surface variant="muted" rounded="full" padding={4}>
                <Icon icon={AlertTriangle} size={8} color="#f59e0b" />
              </Surface>
              <Box>
                <Text weight="medium" color="text-white" block mb={1}>{error instanceof Error ? error.message : error || 'Race not found'}</Text>
                <Text size="sm" color="text-gray-500">
                  The race you&apos;re looking for doesn&apos;t exist or has been removed.
                </Text>
              </Box>
              <Button
                variant="secondary"
                onClick={onBack}
              >
                Back to Races
              </Button>
            </Stack>
          </Card>
        </Stack>
      </Container>
    );
  }

  const { race, league, entryList, userResult } = viewData;

  const statusConfig = {
    scheduled: {
      icon: Clock,
      variant: 'primary' as const,
      label: 'Scheduled',
      description: 'This race is scheduled and waiting to start',
    },
    running: {
      icon: PlayCircle,
      variant: 'success' as const,
      label: 'LIVE NOW',
      description: 'This race is currently in progress',
    },
    completed: {
      icon: CheckCircle2,
      variant: 'default' as const,
      label: 'Completed',
      description: 'This race has finished',
    },
    cancelled: {
      icon: XCircle,
      variant: 'warning' as const,
      label: 'Cancelled',
      description: 'This race has been cancelled',
    },
  };

  const config = statusConfig[race.status] || statusConfig.scheduled;

  const breadcrumbItems = [
    { label: 'Races', href: '/races' },
    ...(league ? [{ label: league.name, href: `/leagues/${league.id}` }] : []),
    { label: race.track },
  ];

  return (
    <Container size="lg" py={8}>
      <Stack gap={6}>
        {/* Navigation Row */}
        <Stack direction="row" align="center" justify="between">
          <Breadcrumbs items={breadcrumbItems} />
          <Button
            variant="secondary"
            onClick={onBack}
            size="sm"
            icon={<Icon icon={ArrowLeft} size={4} />}
          >
            Back
          </Button>
        </Stack>

        {/* User Result */}
        {userResult && (
          <RaceUserResult 
            {...userResult} 
            animatedRatingChange={animatedRatingChange} 
          />
        )}

        {/* Hero Header */}
        <RaceHero 
          track={race.track}
          scheduledAt={race.scheduledAt}
          car={race.car}
          status={race.status}
          statusConfig={config}
        />

        <Grid cols={12} gap={6}>
          <GridItem lgSpan={8} colSpan={12}>
            <Stack gap={6}>
              <RaceDetailCard 
                track={race.track}
                car={race.car}
                sessionType={race.sessionType}
                statusLabel={config.label}
                statusColor={config.variant === 'success' ? '#10b981' : config.variant === 'primary' ? '#3b82f6' : '#9ca3af'}
              />

              <RaceEntryList 
                entries={entryList}
                onDriverClick={onDriverClick}
              />
            </Stack>
          </GridItem>

          <GridItem lgSpan={4} colSpan={12}>
            <Stack gap={6}>
              {league && <LeagueSummaryCard league={league} />}

              {/* Actions Card */}
              <Card>
                <Stack gap={4}>
                  <Text size="xl" weight="bold" color="text-white">Actions</Text>
                  <Stack gap={3}>
                    <RaceJoinButton
                      raceStatus={race.status}
                      isUserRegistered={viewData.registration.isUserRegistered}
                      canRegister={viewData.registration.canRegister}
                      onRegister={onRegister}
                      onWithdraw={onWithdraw}
                      onCancel={onCancel}
                      onReopen={onReopen}
                      onEndRace={onEndRace}
                      canReopenRace={viewData.canReopenRace}
                      isOwnerOrAdmin={isOwnerOrAdmin}
                      isLoading={mutationLoading}
                    />

                    {race.status === 'completed' && (
                      <>
                        <Button variant="primary" fullWidth onClick={onResultsClick} icon={<Icon icon={Trophy} size={4} />}>
                          View Results
                        </Button>
                        {userResult && (
                          <Button variant="secondary" fullWidth onClick={onFileProtest} icon={<Icon icon={Scale} size={4} />}>
                            File Protest
                          </Button>
                        )}
                        <Button variant="secondary" fullWidth onClick={onStewardingClick} icon={<Icon icon={Scale} size={4} />}>
                          Stewarding
                        </Button>
                      </>
                    )}
                  </Stack>
                </Stack>
              </Card>

              {/* Status Info */}
              <InfoBox 
                icon={config.icon}
                title={config.label}
                description={config.description}
                variant={config.variant}
              />
            </Stack>
          </GridItem>
        </Grid>
      </Stack>
    </Container>
  );
}