import { getConversationKey } from "./utils";
let myProfileCache;
const profileCache = {};
const groupMembersCache = {};
export default class Service {
  constructor(config) {
    this.config = config;
  }
  getUserProfile(id) {
    if (!this.config.getUserProfile) {
      return Promise.reject(new Error("Method getUserProfile is not defined!"));
    }
    if (myProfileCache) {
      return Promise.resolve(myProfileCache);
    }
    return this.config.getUserProfile(id).then(res => {
      myProfileCache = res;
      return myProfileCache;
    });
  }
  getConversationProfile(conversations) {
    if (!this.config.getConversationProfile) {
      return Promise.reject(
        new Error("Method getConversationProfile is not defined!")
      );
    }
    // 临时存放从缓存取出的数据
    const temp = [];
    for (let i = 0; i < conversations.length; i++) {
      const conversation = conversations[i];
      const key = getConversationKey(conversation);
      const profile = profileCache[key];
      if (profile) {
        // 缓存中存在的数据，不再查询
        conversations.splice(i, 1);
        temp.push(profile);
        i--;
      }
    }
    return this.config.getConversationProfile(conversations).then(profiles => {
      // 对数据进行缓存
      profiles.forEach(profile => {
        if (profile && profile.targetId && profile.conversationType) {
          const key = getConversationKey(profile);
          profileCache[key] = profile;
        }
      });
      // 将之前的临时数据合并
      return [...profiles, ...temp];
    });
  }
  getGroupMembers(conversation) {
    if (!this.config.getGroupMembers) {
      return Promise.reject(
        new Error("Method getGroupMembers is not defined!")
      );
    }

    const key = getConversationKey(conversation);
    if (groupMembersCache[key]) {
      return Promise.resolve(groupMembersCache[key]);
    }
    return this.config.getGroupMembers(conversation).then(res => {
      console.log(res, "res");
      const key = getConversationKey(conversation);
      if (res) {
        groupMembersCache[key] = res;
        return groupMembersCache[key];
      }
      return null;
    });
  }
  clearMyProfileCache() {
    myProfileCache = null;
  }
}