'use client';

import React, { useState } from 'react';
import { AlertCircle } from 'lucide-react';
import { useInject } from '@/lib/di/hooks/useInject';
import { RACE_RESULTS_SERVICE_TOKEN } from '@/lib/di/tokens';
import { FilePicker } from '@/ui/FilePicker';
import { Box } from '@/ui/Box';
import { Text } from '@/ui/Text';
import { Stack } from '@/ui/Stack';
import { InfoBox } from '@/ui/InfoBox';

interface ImportResultsFormProps {
  raceId: string;
  onSuccess: (results: unknown[]) => void;
  onError: (error: string) => void;
}

export function ImportResultsForm({ raceId, onSuccess, onError }: ImportResultsFormProps) {
  const [uploading, setUploading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const raceResultsService = useInject(RACE_RESULTS_SERVICE_TOKEN);

  const handleFileChange = async (event: React.ChangeEvent<HTMLInputElement>) => {
    const file = event.target.files?.[0];
    if (!file) return;

    setUploading(true);
    setError(null);

    try {
      const content = await file.text();
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
      const results = (raceResultsService as any).parseAndTransformCSV(content, raceId);
      onSuccess(results);
    } catch (err) {
      const errorMessage =
        err instanceof Error ? err.message : 'Failed to parse CSV file';
      setError(errorMessage);
      onError(errorMessage);
    } finally {
      setUploading(false);
      event.target.value = '';
    }
  };

  return (
    <Stack gap={4}>
      <FilePicker
        label="Upload Results CSV"
        description="CSV format: driverId, position, fastestLap, incidents, startPosition"
        accept=".csv"
        onChange={handleFileChange}
        disabled={uploading}
      />

      {error && (
        <InfoBox 
          variant="warning"
          icon={AlertCircle}
          title="Error"
          description={error}
        />
      )}

      {uploading && (
        <Text align="center" color="text-gray-400" size="sm">
          Parsing CSV and importing results...
        </Text>
      )}

      <Box p={4} bg="bg-iron-gray/20" rounded="lg">
        <Text weight="semibold" block mb={2} size="xs" color="text-gray-500">CSV Example:</Text>
        <Box as="pre" color="text-gray-400">
{`driverId,position,fastestLap,incidents,startPosition
550e8400-e29b-41d4-a716-446655440001,1,92.456,0,3
550e8400-e29b-41d4-a716-446655440002,2,92.789,1,1
550e8400-e29b-41d4-a716-446655440003,3,93.012,2,2`}
        </Box>
      </Box>
    </Stack>
  );
}
