// 数字格式化工具
export const numberUtils = {
  // 格式化数字，添加千分位分隔符
  format: (num: number, decimalPlaces: number = 0): string => {
    if (isNaN(num)) return '0';
    return num.toFixed(decimalPlaces).replace(/\B(?=(\d{3})+(?!\d))/g, ',');
  },

  // 格式化大数字为K、M、B等形式
  formatLarge: (num: number, decimalPlaces: number = 1): string => {
    if (isNaN(num)) return '0';

    const thresholds = [
      { value: 1, symbol: '' },
      { value: 1000, symbol: 'K' },
      { value: 1000000, symbol: 'M' },
      { value: 1000000000, symbol: 'B' },
      { value: 1000000000000, symbol: 'T' }
    ];

    // 找到合适的阈值
    const threshold = thresholds
      .reverse()
      .find(threshold => num >= threshold.value);

    if (!threshold) return '0';

    // 计算并格式化
    const result = num / threshold.value;
    return `${result.toFixed(decimalPlaces)}${threshold.symbol}`;
  },

  // 格式化数字为中文形式（万、亿等）
  formatChinese: (num: number, decimalPlaces: number = 1): string => {
    if (isNaN(num)) return '0';

    const thresholds = [
      { value: 1, symbol: '' },
      { value: 10000, symbol: '万' },
      { value: 100000000, symbol: '亿' }
    ];

    // 找到合适的阈值
    const threshold = thresholds
      .reverse()
      .find(threshold => num >= threshold.value);

    if (!threshold) return '0';

    // 计算并格式化
    const result = num / threshold.value;
    return `${result.toFixed(decimalPlaces)}${threshold.symbol}`;
  }
};