const CURRENCY_NAME_MAP = {
  CNY: '人民币',
  RMB: '人民币',
  USD: '美元',
  EUR: '欧元',
  JPY: '日元',
  GBP: '英镑',
};

const CURRENCY_UNIT_MAP = {
  CNY: '元',
  RMB: '元',
  USD: '美元',
  EUR: '欧元',
  JPY: '日元',
  GBP: '英镑',
};

const CURRENCY_NAME_TO_UNIT = {
  人民币: '元',
  美元: '美元',
  欧元: '欧元',
  日元: '日元',
  英镑: '英镑',
};

/**
 * 归一化币种代码（CNY → RMB）
 */
export function normalizeCurrencyCode(value, fallback = 'RMB') {
  const raw =
    typeof value === 'object'
      ? value?.dictKey || value?.value || value?.code || value?.dictValue || ''
      : value;
  const normalized = String(raw || fallback)
    .trim()
    .toUpperCase();
  const code = normalized.includes(' - ') ? normalized.split(' - ')[0].trim() : normalized;
  if (!code) return fallback;
  return code === 'CNY' ? 'RMB' : code;
}

/**
 * 币种中文名称
 */
export function currencyName(value) {
  const text = String(value || '');
  if (text.includes(' - ')) return text.slice(text.indexOf(' - ') + 3);
  return CURRENCY_NAME_MAP[text.toUpperCase()] || text;
}

/**
 * 金额单位文案：RMB/CNY → 元，USD → 美元
 */
export function currencyUnit(value) {
  const text = String(value || '');
  let code = text;
  if (text.includes(' - ')) {
    code = text.split(' - ')[0].trim();
  }
  const upperCode = code.toUpperCase();
  if (CURRENCY_UNIT_MAP[upperCode]) {
    return CURRENCY_UNIT_MAP[upperCode];
  }
  if (CURRENCY_NAME_TO_UNIT[code]) {
    return CURRENCY_NAME_TO_UNIT[code];
  }
  return text || '元';
}

/**
 * 将计价单位前缀替换为当前币种单位，如 元/吨 → 美元/吨
 */
export function remapPriceUnitCurrency(priceUnit, currency) {
  const text = String(priceUnit || '').trim();
  if (!text || !text.includes('/')) return text;
  const suffix = text.slice(text.indexOf('/'));
  return `${currencyUnit(currency)}${suffix}`;
}

/**
 * 按数量单位生成默认计价单位
 */
export function resolvePriceUnitByQuantityUnit(quantityUnit, currency = 'RMB') {
  const unit = currencyUnit(currency);
  return (
    {
      吨: `${unit}/吨`,
      方: `${unit}/立方`,
      件: `${unit}/件`,
    }[String(quantityUnit || '').trim()] || ''
  );
}

/**
 * 将字典中的计价单位选项映射到当前币种
 */
export function mapFeeUnitOptions(options = [], currency = 'RMB') {
  const unit = currencyUnit(currency);
  return (options || []).map(item => {
    const label = String(item.label || item.value || '');
    const value = String(item.value || item.label || '');
    return {
      ...item,
      label: label.replace(/^元/, unit).replace(/^人民币/, unit),
      value: value.replace(/^元/, unit).replace(/^人民币/, unit),
    };
  });
}