/**
 * 货币工具函数
 */

import type { CurrencyCode } from '@/types/portfolio';

const CURRENCY_SYMBOLS: Record<string, string> = {
  'CNY': '¥',
  'USD': '$',
  'HKD': 'HK$',
  'EUR': '€',
  'GBP': '£',
  'JPY': '¥',
  'SGD': 'S$',
  'AUD': 'A$'
};

/**
 * 获取货币符号
 * @param currency - 货币代码 (CNY, USD, HKD 等)
 * @returns 货币符号
 */
export function getCurrencySymbol(currency?: string): string {
  return CURRENCY_SYMBOLS[currency?.toUpperCase() ?? 'CNY'] || '¥';
}

/**
 * 格式化金额
 * @param amount - 金额
 * @param currency - 货币代码
 * @param decimals - 小数位数
 * @returns 格式化后的金额字符串
 */
export function formatAmount(
  amount: number,
  currency: CurrencyCode | string = 'CNY',
  decimals: number = 2
): string {
  const symbol = getCurrencySymbol(currency);
  const formatted = Math.abs(amount || 0).toLocaleString('zh-CN', {
    minimumFractionDigits: decimals,
    maximumFractionDigits: decimals
  });
  const sign = amount >= 0 ? '' : '-';
  return `${sign}${symbol}${formatted}`;
}

/**
 * 格式化金额（带正负号）
 * @param amount - 金额
 * @param currency - 货币代码
 * @param decimals - 小数位数
 * @returns 格式化后的金额字符串
 */
export function formatAmountWithSign(
  amount: number,
  currency: CurrencyCode | string = 'CNY',
  decimals: number = 2
): string {
  const symbol = getCurrencySymbol(currency);
  const formatted = Math.abs(amount || 0).toLocaleString('zh-CN', {
    minimumFractionDigits: decimals,
    maximumFractionDigits: decimals
  });
  if (amount > 0) return `+${symbol}${formatted}`;
  if (amount < 0) return `-${symbol}${formatted}`;
  return `${symbol}${formatted}`;
}