import { request } from "@cqsjjb/jjb-common-lib/http";
import { useState } from "react";
import { DICTIONARY_APP_KEY_ENUM } from "../../enum/dictionary";

/**
 * 获取数据字典
 */
function useDictionary(returnType = "object") {
  // loading状态
  const [loading, setLoading] = useState(false);
  // 用于跟踪进行中的请求数量（不暴露给外部）
  let requestCount = 0;

  // 获取数据字典
  const getDictionary = (options) => {
    if (!options)
      throw new Error("请传入 options");

    // 增加请求数量并设置loading状态
    requestCount++;
    if (requestCount > 0) {
      setLoading(true);
    }

    return new Promise((resolve, reject) => {
      const { appKey = DICTIONARY_APP_KEY_ENUM.DEFAULT, dictValue } = options;

      if (!Object.values(DICTIONARY_APP_KEY_ENUM).includes(appKey))
        throw new Error("传入的 options.appKey 不在 DICTIONARY_APP_KEY_ENUM 中");
      if (!dictValue)
        throw new Error("请传入 options.dictValue");

      // 发送请求
      request(
        "/config/dict-trees/list/by/dictValues",
        "get",
        { appKey, dictValue },
      )
        .then((res) => {
          resolve(res.data);
        })
        .catch((err) => {
          reject(err);
        })
        .finally(() => {
          // 减少请求数量并在没有进行中的请求时设置loading为false
          requestCount--;
          if (requestCount <= 0) {
            setLoading(false);
          }
        });
    });
  };

  if (returnType === "array")
    return [loading, getDictionary];
  return { loading, getDictionary };
}

export default useDictionary;