import { BaseStore } from 'base-store';
import { FastStore } from 'fast-store';
import { toPromise } from '../utils';
declare var wx;
const fastStore = new FastStore();

export class Store extends BaseStore {
  constructor() {
    super()
  }

  getInfo () {
    return toPromise(wx.getStorageInfo);
  }

  set (key: string, data: any, fast?:boolean) {
    if(fast) fastStore.set(key, data);
    return toPromise(wx.setStorage, { key, data }).then(() => {
      return this.get(key, fast);
    });
  }

  get (key: string, fast?:boolean) {
    if(fast){
      const fastValue = fastStore.get(key);
      if(fastValue) return Promise.resolve(fastValue);
      return new Promise((resolve) => {
        return toPromise(wx.getStorage, { key }).then((res:any) => {
          resolve(res.data);
          fastStore.set(key, res.data);
        }, () => {
          resolve(null); // 读取出错也从这里走，结果返回null
          fastStore.set(key, null);
        });
      });
    }else{
      return new Promise((resolve) => {
        return toPromise(wx.getStorage, { key }).then((res:any) => {
          resolve(res.data);
        }, () => {
          resolve(null); // 读取出错也从这里走，结果返回null
        });
      });
    }
  }

  remove (key: string) {
    fastStore.remove(key);
    return toPromise(wx.removeStorage, { key });
  }

  clear () {
    fastStore.clear();
    return toPromise(wx.clearStorage);
  }

  base (storeName, fast?:boolean) {
    return {
      set: (key: string, data) => {
        return this.get(storeName).then((res) => {
          res = res || {};
          res[key] = data;
          return this.set(storeName, res).then(() => {
            return data;
          });
        });
      },
      get: (key: string) => {
        return this.get(storeName).then((res) => {
          res = res || {};
          return res[key];
        });
      },
      getAll: () => {
        return this.get(storeName).then((res) => {
          return res || {};
        });
      },
      remove: (key: string) => {
        return this.get(storeName).then((res) => {
          res[key] = null;
          delete res[key];
          return this.set(storeName, res);
        });
      },
      clear: () => {
        return this.clear();
      }
    }
  }

  // 页面存储
  page = (pageName:string) => {
    return this.base('page.' + pageName);
  }
}