import { asRecord, asString } from '../api.js';
import type { SixtySClient } from '../client.js';

export default async function (client: SixtySClient, args: { province?: string }) {
  const params: Record<string, string> | undefined = args.province
    ? { province: args.province }
    : undefined;
  const data = await client.fetch('/fuel-price', params);
  const lines = ['⛽ 今日油价', ''];
  if (data.region) lines.push(`📍 ${data.region}`);
  if (data.items && Array.isArray(data.items)) {
    data.items.forEach((item: Record<string, unknown>) => {
      lines.push(`${item.name}: ${item.price_desc || `¥${item.price}/升`}`);
    });
  }
  if (data.trend) {
    const trend = asRecord(data.trend);
    lines.push('', `📊 ${asString(trend.description)}`);
  }
  return lines.join('\n');
}