import { Box, FileInput, Group, Stack, TextInput, Textarea, Title } from "@mantine/core";
import { useForm, UseFormInput } from "@mantine/form";
import { LinkIcon } from "@phosphor-icons/react";
import { Tournament, TournamentFormInput } from "@/features/tournaments/types";
import { DateInputSheet } from "../../../components/date-input";
import { isNotEmpty } from "@mantine/form";
import toast from '@/lib/sonner';
import { logger } from "..";
import { useQueryClient, useMutation } from "@tanstack/react-query";
import { tournamentQueries } from "@/features/tournaments/queries";
import { updateTournament } from "@/features/tournaments/server";
import { useRouter } from "@tanstack/react-router";
import Button from "@/components/button";

interface EditTournamentProps {
  tournament: Tournament;
}

const EditTournament = ({ tournament }: EditTournamentProps) => {
  const router = useRouter();
  const queryClient = useQueryClient();

  const config: UseFormInput<TournamentFormInput> = {
    initialValues: {
      name: tournament.name || '',
      location: tournament.location || '',
      desc: tournament.desc || '',
      start_time: tournament.start_time || '',
      enroll_time: tournament.enroll_time || '',
      end_time: tournament.end_time || '',
      rules: tournament.rules || '',
      logo: undefined, // Always start with no file selected
    },
    onSubmitPreventDefault: 'always',
    validate: {
      name: isNotEmpty('Name is required'),
      location: isNotEmpty('Location is required'),
      start_time: isNotEmpty('Start time is required'),
      enroll_time: isNotEmpty('Enrollment time is required'),
    }
  };

  const form = useForm(config);

  const { mutate: editTournament, isPending } = useMutation({
    mutationFn: (data: Partial<TournamentFormInput>) => 
      updateTournament({ data: { id: tournament.id, updates: data } }),
    onSuccess: (updatedTournament) => {
      if (updatedTournament) {
        queryClient.invalidateQueries({ queryKey: tournamentQueries.list().queryKey });
        queryClient.setQueryData(
          tournamentQueries.details(updatedTournament.id).queryKey,
          updatedTournament
        );
      }
    }
  });

  const handleSubmit = async (values: TournamentFormInput) => {
    const { logo, ...tournamentData } = values;
    
    editTournament(tournamentData, {
      onSuccess: async (updatedTournament) => {
        if (logo && updatedTournament) {
          try {
            const formData = new FormData();
            formData.append('tournamentId', updatedTournament.id);
            formData.append('logo', logo);

            const response = await fetch('/api/tournaments/upload-logo', {
              method: 'POST',
              body: formData,
            });

            if (!response.ok) {
              const error = await response.json();
              throw new Error(error.error || 'Failed to upload logo');
            }

            const result = await response.json();
            
            queryClient.setQueryData(
              tournamentQueries.details(result.tournament!.id).queryKey,
              result.tournament
            );
            
            toast.success('Tournament updated successfully!');
          } catch (error: any) {
            toast.error(`Tournament updated but logo upload failed: ${error.message}`);
            logger.error('Tournament logo upload error', error);
          }
        } else {
          toast.success('Tournament updated successfully!');
        }
        
        router.history.back();
      },
      onError: (error: any) => {
        toast.error(`Failed to update tournament: ${error.message}`);
        logger.error('Tournament update error', error);
      }
    });
  };

  return (
    <Box w="100%" maw={600} mx="auto" p="lg">
      <Stack gap="lg">
        <Title order={2}>Edit Tournament</Title>
        
        <form onSubmit={form.onSubmit(handleSubmit)}>
          <Stack gap="md">
            <TextInput
              label="Name"
              withAsterisk
              key={form.key('name')}
              {...form.getInputProps('name')}
            />
            
            <TextInput
              label="Location"
              withAsterisk
              key={form.key('location')}
              {...form.getInputProps('location')}
            />

            <Textarea
              label="Description"
              key={form.key('desc')}
              {...form.getInputProps('desc')}
              minRows={3}
            />

            <Textarea
              label="Rules"
              key={form.key('rules')}
              {...form.getInputProps('rules')}
              minRows={4}
            />

            <FileInput
              key={form.key('logo')}
              accept="image/png,image/jpeg,image/gif,image/jpg"
              label="Change Logo"
              leftSection={<LinkIcon size={16} />}
              {...form.getInputProps('logo')}
            />

            <DateInputSheet
              label="Start Date"
              withAsterisk
              value={form.values.start_time}
              onChange={(value) => form.setFieldValue('start_time', value)}
              error={form.errors.start_time}
            />

            <DateInputSheet
              label="Enrollment Due"
              withAsterisk
              value={form.values.enroll_time}
              onChange={(value) => form.setFieldValue('enroll_time', value)}
              error={form.errors.enroll_time}
            />

            <DateInputSheet
              label="End Date (Optional)"
              value={form.values.end_time || ''}
              onChange={(value) => form.setFieldValue('end_time', value)}
              error={form.errors.end_time}
            />

            <Group justify="flex-end" mt="lg">
              <Button 
                variant="light" 
                onClick={() => router.history.back()}
                disabled={isPending}
              >
                Cancel
              </Button>
              <Button 
                type="submit" 
                loading={isPending}
              >
                Update Tournament
              </Button>
            </Group>
          </Stack>
        </form>
      </Stack>
    </Box>
  );
};

export default EditTournament;