import {EventEmitter, Injectable} from '@angular/core';
import {FeedbackOxService} from './feedback-ox.service';
import {AppInfoOxService} from './app-info-ox.service';
import {GameActionsService} from './game-actions.service';
import {AnswerService} from './answer.service';
import {LevelService} from './level.service';
import {withLatestFrom} from 'rxjs/operators';
import {PartCorrectness, UserAnswer} from 'ox-types';

@Injectable({
  providedIn: 'root'
})
export class ProgressService {

  startProgress: EventEmitter<void>;
  changeInProgress: EventEmitter<number>;

  private totalToComplete: number;
  private currentCompleted: number;

  constructor(private feedbackService: FeedbackOxService,
              private gameActions: GameActionsService<any>,
              private levelService: LevelService,
              private answerService: AnswerService,
              private appInfo: AppInfoOxService) {
    this.startProgress = new EventEmitter();
    this.changeInProgress = new EventEmitter();
    this.gameActions.restartGame.subscribe(x => {
      this.onStartProgress();
    });
    this.gameActions.startGame.subscribe(x => {
      this.onStartProgress();
    });
    this.feedbackService.surrenderEnd.subscribe(x => {
      this.completeOne();
    });
    this.feedbackService.endFeedback.pipe(withLatestFrom(this.gameActions.checkedAnswer)).subscribe(params => {
      const correctness = (params[1] as { correctness: PartCorrectness, answer: UserAnswer }).correctness;
      if (correctness === 'correct' || (correctness === 'unknown')
        && ['results-without-correction', 'use'].includes(this.appInfo.microLessonInfo.creatorInfo?.metricsType)) {
        this.completeOne();
      }
    });
  }

  private completeOne() {
    this.currentCompleted++;
    this.changeInProgress.emit(Math.round((this.currentCompleted * 100) / this.totalToComplete));
  }

  onStartProgress() {
    this.totalToComplete = this.appInfo.getTotalChallengeCount(this.levelService.currentLevel.value);
    this.currentCompleted = 0;
    this.startProgress.emit();
  }

}