'use client';

import { useState } from 'react';
import { useParams } from 'next/navigation';
import { PageWrapper } from '@/components/shared/state/PageWrapper';
import { LeagueAdminScheduleTemplate } from '@/templates/LeagueAdminScheduleTemplate';
import {
  useLeagueAdminStatus,
  useLeagueSeasons,
  useLeagueAdminSchedule
} from "@/hooks/league/useLeagueScheduleAdminPageData";
import { useEffectiveDriverId } from "@/hooks/useEffectiveDriverId";
import { useMutation, useQueryClient } from '@tanstack/react-query';
import { useInject } from '@/lib/di/hooks/useInject';
import { LEAGUE_SERVICE_TOKEN } from '@/lib/di/tokens';
import { Box } from '@/ui/Box';
import { Stack } from '@/ui/Stack';
import { Text } from '@/ui/Text';
import { Card } from '@/ui/Card';
import { Heading } from '@/ui/Heading';

export function LeagueAdminSchedulePageClient() {
  const params = useParams();
  const leagueId = params.id as string;
  const currentDriverId = useEffectiveDriverId() || '';
  const queryClient = useQueryClient();
  
  const leagueService = useInject(LEAGUE_SERVICE_TOKEN);

  // Form state
  const [seasonId, setSeasonId] = useState<string>('');
  const [track, setTrack] = useState('');
  const [car, setCar] = useState('');
  const [scheduledAtIso, setScheduledAtIso] = useState('');
  const [editingRaceId, setEditingRaceId] = useState<string | null>(null);

  // Check admin status using domain hook
  const { data: isAdmin, isLoading: isAdminLoading } = useLeagueAdminStatus(leagueId, currentDriverId);

  // Load seasons using domain hook
  const { data: seasonsData, isLoading: seasonsLoading } = useLeagueSeasons(leagueId, !!isAdmin);

  // Auto-select season
  const selectedSeasonId = seasonId || (seasonsData && seasonsData.length > 0
    ? (seasonsData.find((s) => s.status === 'active') ?? seasonsData[0])?.seasonId
    : '');

  // Load schedule using domain hook
  const { data: schedule, isLoading: scheduleLoading } = useLeagueAdminSchedule(leagueId, selectedSeasonId, !!isAdmin);

  // Mutations
  const publishMutation = useMutation({
    mutationFn: async () => {
      if (!schedule || !selectedSeasonId) return null;
      return schedule.published
        ? await leagueService.unpublishAdminSchedule(leagueId, selectedSeasonId)
        : await leagueService.publishAdminSchedule(leagueId, selectedSeasonId);
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['adminSchedule', leagueId, selectedSeasonId] });
    },
  });

  const saveMutation = useMutation({
    mutationFn: async () => {
      if (!selectedSeasonId || !scheduledAtIso) return null;
      
      if (!editingRaceId) {
        return await leagueService.createAdminScheduleRace(leagueId, selectedSeasonId, {
          track,
          car,
          scheduledAtIso,
        });
      } else {
        return await leagueService.updateAdminScheduleRace(leagueId, selectedSeasonId, editingRaceId, {
          ...(track ? { track } : {}),
          ...(car ? { car } : {}),
          ...(scheduledAtIso ? { scheduledAtIso } : {}),
        });
      }
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['adminSchedule', leagueId, selectedSeasonId] });
      // Reset form
      setTrack('');
      setCar('');
      setScheduledAtIso('');
      setEditingRaceId(null);
    },
  });

  const deleteMutation = useMutation({
    mutationFn: async (raceId: string) => {
      return await leagueService.deleteAdminScheduleRace(leagueId, selectedSeasonId, raceId);
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['adminSchedule', leagueId, selectedSeasonId] });
    },
  });

  // Derived states
  const isLoading = isAdminLoading || seasonsLoading || scheduleLoading;
  const isPublishing = publishMutation.isPending;
  const isSaving = saveMutation.isPending;
  const isDeleting = deleteMutation.variables || null;

  // Handlers
  const handleSeasonChange = (newSeasonId: string) => {
    setSeasonId(newSeasonId);
    setEditingRaceId(null);
    setTrack('');
    setCar('');
    setScheduledAtIso('');
  };

  const handlePublishToggle = () => {
    publishMutation.mutate();
  };

  const handleAddOrSave = () => {
    if (!scheduledAtIso) return;
    saveMutation.mutate();
  };

  const handleEdit = (raceId: string) => {
    if (!schedule) return;
    const race = schedule.races.find((r) => r.id === raceId);
    if (!race) return;

    setEditingRaceId(raceId);
    setTrack('');
    setCar('');
    setScheduledAtIso(race.scheduledAt.toISOString());
  };

  const handleDelete = (raceId: string) => {
    const confirmed = window.confirm('Delete this race?');
    if (!confirmed) return;
    deleteMutation.mutate(raceId);
  };

  const handleCancelEdit = () => {
    setEditingRaceId(null);
    setTrack('');
    setCar('');
    setScheduledAtIso('');
  };

  // Prepare template data
  const templateData = schedule && seasonsData && selectedSeasonId
    ? {
        published: schedule.published,
        races: schedule.races.map(r => ({
          id: r.id,
          name: r.name,
          track: r.track || '',
          car: r.car || '',
          scheduledAt: r.scheduledAt.toISOString(),
        })),
        seasons: seasonsData.map(s => ({
          seasonId: s.seasonId,
          name: s.name,
        })),
        seasonId: selectedSeasonId,
      }
    : undefined;

  // Render admin access required if not admin
  if (!isLoading && !isAdmin) {
    return (
      <Stack gap={6}>
        <Card>
          <Box p={6} textAlign="center">
            <Heading level={3}>Admin Access Required</Heading>
            <Box mt={2}>
              <Text size="sm" color="text-gray-400">Only league admins can manage the schedule.</Text>
            </Box>
          </Box>
        </Card>
      </Stack>
    );
  }

  // Template component that wraps the actual template with all props
  const TemplateWrapper = ({ data }: { data: typeof templateData }) => {
    if (!data) return null;
    
    return (
      <LeagueAdminScheduleTemplate
        viewData={data}
        onSeasonChange={handleSeasonChange}
        onPublishToggle={handlePublishToggle}
        onAddOrSave={handleAddOrSave}
        onEdit={handleEdit}
        onDelete={handleDelete}
        onCancelEdit={handleCancelEdit}
        track={track}
        car={car}
        scheduledAtIso={scheduledAtIso}
        editingRaceId={editingRaceId}
        isPublishing={isPublishing}
        isSaving={isSaving}
        isDeleting={isDeleting}
        setTrack={setTrack}
        setCar={setCar}
        setScheduledAtIso={setScheduledAtIso}
      />
    );
  };

  return (
    <PageWrapper
      data={templateData}
      isLoading={isLoading}
      error={null}
      Template={TemplateWrapper}
      loading={{ variant: 'full-screen', message: 'Loading schedule admin...' }}
      empty={{
        title: 'No schedule data available',
        description: 'Unable to load schedule administration data',
      }}
    />
  );
}