class Task {
  constructor(taskname,taskdescription,tasktype,tasktime,callback,deleteonrun = false) {
    // tasktype: 0: interval, 1: fixed time
    this.Name = taskname;
    this.Description = taskdescription;
    this.Type = tasktype;
    this.Enabled = true;
    this.Time = tasktime;
    this.LastCall = Date.now();
    this.CallCount = 0;
    this.DeleteOnRun = false;
    if (deleteonrun) this.DeleteOnRun = true;
    this.Callback = callback;
    if (!(tasktype >= 0 && tasktype <= 1)) this.Type = 0;
  }
  CheckTime() {
    let time = this.Time;
    if (this.Type == 0) time = this.LastCall + this.Time;
    if (this.Enabled && (Date.now() >= time)) {
      this.LastCall = Date.now();
      this.CallCount++;
      if (this.Type == 1 || this.DeleteOnRun == true) this.Enabled = false;
      this.Callback();
      return true;
    }
    return false;
  }
}

class ScheduleEngine {
  constructor() {
    this.Tasks = new Array();
  }

  addTask(task) {
    this.Tasks.push(task);
  }

  deleteTask(task) {
    for (let a = 0; a < this.Tasks.length; a++) {
      if (this.Tasks[a] == task) {
        this.Tasks.splice(a,1);
        return true;
      }
    }
    return false;
  }

  Tick() {
    for (let a = 0; a < this.Tasks.length; a++) {
      this.Tasks[a].CheckTime();
      if (!this.Tasks[a].Enabled && this.Tasks[a].DeleteOnRun) {
        this.Tasks.splice(a,1);
        a--;
      }
    }
  }


}