import { i18n } from '../locale';

type I18nGlobalTranslation = {
  (key: string): string;
  (key: string, locale: string): string;
  (key: string, locale: string, list: unknown[]): string;
  (key: string, locale: string, named: Record<string, unknown>): string;
  (key: string, list: unknown[]): string;
  (key: string, named: Record<string, unknown>): string;
};

type I18nTranslationRestParameters = [string, any];

export function useI18n(namespace?: string): {
  t: I18nGlobalTranslation;
} {
  const normalFn = {
    t: (key: string) => {
      return key;
    },
  };

  if (!i18n) {
    return normalFn;
  }

  const { t, ...methods } = i18n.global;

  const tFn: I18nGlobalTranslation = (key: string, ...arg: any[]) => {
    if (!key) return '';
    if (!key.includes('.') && !namespace) return key;
    // @ts-ignore
    return t(key, ...(arg as I18nTranslationRestParameters));
  };
  return {
    ...methods,
    t: tFn,
  };
}

// Why write this function？
// Mainly to configure the vscode i18nn ally plugin. This function is only used for routing and menus. Please use useI18n for other places

// 为什么要编写此函数？
// 主要用于配合vscode i18nn ally插件。此功能仅用于路由和菜单。请在其他地方使用useI18n
export const t = (key: string) => key;
