import type { FetchDataResult, IngestionSourceResult } from '../api/ingestion';

export type IngestionToastType = 'success' | 'error' | 'info';

export interface IngestionStatusSummary {
  toastType: IngestionToastType;
  message: string;
}

export function summarizeIngestionResult(
  result: FetchDataResult | null | undefined,
  fallbackLabel: string,
): IngestionStatusSummary {
  const sources = result?.sources;
  if (!sources) {
    return {
      toastType: 'success',
      message: `Data fetched for ${fallbackLabel}`,
    };
  }

  const entries = Object.entries(sources) as [string, IngestionSourceResult][];
  const parts = entries.map(([name, info]) => {
    const label = name.charAt(0).toUpperCase() + name.slice(1);
    if (info.status === 'ok') {
      return `${label} ✓`;
    }
    if (info.status === 'warning') {
      return `${label} ⚠${info.message ? `: ${info.message}` : ': no data'}`;
    }
    if (info.status === 'skipped') {
      return `${label}: skipped${info.message ? ` (${info.message})` : ''}`;
    }
    return `${label} ✗${info.message ? `: ${info.message}` : ''}`;
  });

  const hasError = entries.some(([, source]) => source.status === 'error');
  const hasWarning = entries.some(([, source]) => source.status === 'warning');
  const hasSkip = entries.some(([, source]) => source.status === 'skipped');
  // A warning (e.g. 0 bars returned) must not read as success.
  const toastType: IngestionToastType = hasError ? 'error' : hasWarning || hasSkip ? 'info' : 'success';

  return {
    toastType,
    message: parts.join(' · '),
  };
}