import { Request, Response  } from 'express';
import { HandlerContext } from './common';
import { Prehandler } from './prehandler';
import { Service } from './service';
import { Application } from './app';
import { Job, RecurrenceRule, RecurrenceSpecDateRange, RecurrenceSpecObjLit} from 'node-schedule';

type ScheduleHandler = () => void;

interface ScheduleRepeatOptions {
  cron: string;
  date: Date;
  rule: RecurrenceRule | RecurrenceSpecDateRange | RecurrenceSpecObjLit;
}

type ScheduleRepeatConfigGenerator = (app: Application) => ScheduleRepeatOptions;

type ScheduleRepeat = ScheduleRepeatConfigGenerator | ScheduleRepeatOptions;

interface ScheduleCreateOption {
  name: string;
  repeat: ScheduleRepeat;
  service: Service;
  handler: Function;
}

export interface ScheduleJobCallbackOptions {
  fireDate: Date;
}

type ScheduleJobCallback = (options: ScheduleJobCallbackOptions) => void;

export declare class Schedule {
  static Create(options: ScheduleCreateOption): Schedule;
  constructor(options: ScheduleCreateOption);
  scheduleJob(app: Application): Promise<void>;
  cancel(): void;
  invoke(): void;

  readonly name: string;
  readonly repeat: ScheduleRepeat;
  readonly service: Service;
  readonly handler: ScheduleJobCallback;

  private _name: string;
  private _repeat: ScheduleRepeat;
  private _service: Service;
  private _handler: ScheduleJobCallback;
  private _job: Job;
}