/**
 * 用于处理，记录 学习的情况
 */
const studyDurationKey='xus_duration';
const studyVideoKeyPre='xus_video';

/**
 * 设置视频的播放时间
 * @param {} courseId
 * @param {*} time
 */
const setVideoTime=function(courseId,time){
  localStorage.setItem(studyVideoKeyPre+'_'+courseId,time);
}

/**
 * 设置本地存储的学习时长
 */
const setStudyDuration=function(duration){
  //console.log(duration,'设置时长');
  localStorage.setItem(studyDurationKey,duration);
}

/**
 * 清除本地记录的学习时长
 */
const clearStudyDuration=function(){
  localStorage.setItem(studyDurationKey,0);
}

const getStudyDuration=function(){
  let speedValue=localStorage.getItem(studyDurationKey);
  if(speedValue){
    //console.log(speedValue,'speedValue');
    return Number(speedValue);
  }else{
    return 0;
  }
}
/**
 * 追加学习时长
 * @param Number duration  学习时长(秒)
 */
const appendStudyDuration=function(duration){
  let speedValue=localStorage.getItem(studyDurationKey);
  if(speedValue){
    localStorage.setItem(studyDurationKey,Number(speedValue)+duration);
  }else{
    localStorage.setItem(studyDurationKey,duration);
  }
}

export default {
  getStudyDuration,
  setStudyDuration,
  clearStudyDuration,
  appendStudyDuration
}