// 本地存储

import Dexie  from 'dexie'
import { formatData } from './utils'

class IndexDb {
  private db:any
  constructor() {
    this.db = new Dexie('collectInfo-page-info');
    this.db.version(1).stores({
      infoTables: '++id'
    });
  }

  addItemToDb(data: any, success: Function) {
    const maxNum = (window as any).CollectCurrentPageInfoIndexDbSizeRecordNum || 2000;
    const add = () => {
      this.db.infoTables.add({info: formatData([data])}).then(() => {
        success();
      }).catch(() => {
        success();
      })
    };

    this.db.infoTables.count((num: number) => {
      console.log(num, maxNum)
      if (num < maxNum) {
        add();
      } else {
        // 先删除最早的一条记录
        this.db.infoTables.toCollection().first((item: any) => {
          this.removeItemFromDb(item.id, () => {
            add();
          });
        });
      }
    })
  }
  
  
  removeItemFromDb(id: number, callback: Function) {
    this.db.infoTables.delete(id).then(() => {
      callback();
    });
  }

  clear() {
    this.db.infoTables.clear();
  }

  getAllItemToDb(callback: Function) {
    this.db.infoTables.toArray().then((res: any)=> {
      console.log(res);
      callback && callback(res);
    })
  }
}

export default IndexDb