import 'dart:async';
import 'dart:io';

import 'package:oto_cli/cli/commands/command_base.dart';
import 'package:dart_framework/utils/system_util.dart';
import 'package:oto_cli/cli/commands/scheduler/scheduler_manager.dart';

class CommandScheduler extends CommandBase {

  @override
  Map<String, List<String>> get arguments => {
        '-l': ["Shows the currently operational schedulers."],
        '-r {file}': ["Register the defined file (yaml) with the scheduler."],
        '-u {alias}': ["Unregister schedules registered with the scheduler based on alias."]
      };
  @override
  String get name => 'scheduler';
  final SchedulerManager _scheduler = SchedulerManager();

  @override
  Future execute(List<String> parameters) async {
    for (var i = 0; i < parameters.length; ++i) {
      var item = parameters[i];
      if (item.startsWith('-l')) {
        await _scheduler.showList();
        break;
      } else if (item.startsWith('-r')) {
        var file = '';
        if (parameters.length > i + 1) {
          file = parameters[i + 1];
        } else {
          file = item.replaceFirst('-r', '').trimLeft();
        }
        await _scheduler.regist(file);
        exit(0);
      } else if (item.startsWith('-u')) {
        var alias = '';
        if (parameters.length > i + 1) {
          alias = parameters[i + 1];
        } else {
          alias = item.replaceFirst('-u', '').trimLeft();
        }
        await _scheduler.unregist(alias);
        break;
      } else if (item.startsWith('-s')) { //hidden: start process
        await _scheduler.start();
        break;
      } else if (item.startsWith('-t')) { //hidden: terminate process
        await _scheduler.terminate();
        break;
      } else {
        printHelp();
      }
    }
    return simpleFuture;
  }

  @override
  String getDescription() {
    return ':::: Run as a service on the background.';
  }
}