JSJP_Student/jiaPei/Modules/OtherModules/ExerciseModule/ViewModel/ExercisePage/RQTestQuestionsViewModel.m

//
//  RQTestQuestionsViewModel.m
//  JSJP
//
//  Created by 张嵘 on 2021/8/12.
//

#import "RQTestQuestionsViewModel.h"

@interface RQTestQuestionsViewModel ()
@property (nonatomic, readwrite, assign) RQExerciseOptionItemType exerciseOptionItemType;
@property (nonatomic, readwrite, assign) RQAnswerResultsType answerResultsType;
//@property (nonatomic, readwrite, assign) RQExerciseType exerciseType;
/// homePageCarType
@property (nonatomic, readwrite, assign) RQHomePageCarType homePageCarType;
/// homePageSubjectType
@property (nonatomic, readwrite, assign) RQHomePageSubjectType homePageSubjectType;

///    第零组       题目
@property (nonatomic, readwrite, strong) RQCommonGroupViewModel *group0;
///    第一组      选项
@property (nonatomic, readwrite, strong) RQCommonGroupViewModel *group1;
///    第二组      答案
@property (nonatomic, readwrite, strong) RQCommonGroupViewModel *group2;
///    第三组      多选题确定按钮
@property (nonatomic, readwrite, strong) RQCommonGroupViewModel *group3;
///    第四组      试题讲解
@property (nonatomic, readwrite, strong) RQExciseExplainHeaderGroupViewModel *group4;


@end

@implementation RQTestQuestionsViewModel
#pragma mark - Public Method
- (instancetype)initWithServices:(id<RQViewModelServices>)services params:(NSDictionary *)params {
    if (self = [super initWithServices:services params:params]) {
        self.exerciseOptionItemType = RQExerciseOptionItemType_Default;
        self.answerResultsType = RQAnswerResultsType_Unanswered;
//        self.exerciseType = [params[RQExerciseTypeKey] integerValue];
        self.exerciseModel = (RQExerciseModel *)params[RQViewModelUtilKey];
        self.homePageCarType = [params[RQHomePageCarTypeKey] integerValue];
        self.homePageSubjectType = [params[RQHomePageSubjectTypeKey] integerValue];
    }
    return self;
}

- (void)initialize {
    [super initialize];
    
//    self.title = @"";
    /// 隐藏导航栏的细线
    self.prefersNavigationBarBottomLineHidden = YES;
    
    ///配置数据
    [self rq_configureData];
}

- (void)dealloc {
    
}

#pragma mark - PrivateMethod
- (void)rq_configureData {
    @weakify(self)
    /// 答案
    RQExerciseAnswerItemViewModel *exerciseAnswerItemViewModel = [[RQExerciseAnswerItemViewModel alloc] initWithRQExerciseModel:self.exerciseModel];

    /// 多选题确定按钮
    RQExerciseOptionSureBtnItemViewModel *exerciseOptionSureBtnItemViewModel = [[RQExerciseOptionSureBtnItemViewModel alloc] initWithRQExerciseModel:self.exerciseModel];
    
    RQYDTJSModel *ydtJSModel = [RQ_YDT_JS_Question_Module getQuestionJSWithQuestionId:self.exerciseModel.ydtQuestionModel.ID];
    
    /// 视频讲解
    RQExerciseVideoExplainItemViewModel *exerciseVideoExplainItemViewModel = RQStringIsEmpty(ydtJSModel.short_video_url)? nil : [[RQExerciseVideoExplainItemViewModel alloc] initWithRQYDTJSModel:ydtJSModel];
    
    /// 试题讲解
    RQExercisExplainItemViewModel *exercisExplainItemViewModel = [[RQExercisExplainItemViewModel alloc] initWithRQExerciseModel:self.exerciseModel];
   
    ///
    RAC(self, dataSource) = [[RACSignal combineLatest:@[[RACObserve(self, exerciseModel) distinctUntilChanged], RACObserve(self.exerciseModel, userAnswer), [RACObserve(self.exerciseModel, answerResultsType) distinctUntilChanged],RACObserve(RQ_Exercise_Module, currentExerciseType)] reduce:^id (RQExerciseModel *exerciseModel, NSArray *userAnswer, NSNumber *answerResultsType, NSNumber *currentExerciseType) {
        @strongify(self)
        if (RQ_Exercise_Module.currentExerciseType == RQExerciseType_Recitation) {
            self.group2.itemViewModels = @[exerciseAnswerItemViewModel];
            self.group3.itemViewModels = @[];
            self.group4.itemViewModels = RQObjectIsNil(exerciseVideoExplainItemViewModel)? @[exercisExplainItemViewModel] : @[exerciseVideoExplainItemViewModel,exercisExplainItemViewModel];
        } else {
            BOOL isAnswered = (![userAnswer containsObject:@"预选Option"] && userAnswer.count > 0);
            if (isAnswered) {
                if (exerciseModel.answerResultsType == RQAnswerResultsType_Correct) {
                    if (![RQ_Exercise_Module.correctArr containsObject:exerciseModel]) {
                        NSMutableArray *corArr = RQ_Exercise_Module.correctArr.mutableCopy;
                        [corArr addObject:exerciseModel];
                        RQ_Exercise_Module.correctArr = corArr.copy;
                    }
                } else if (exerciseModel.answerResultsType == RQAnswerResultsType_Error) {
                    if (![RQ_Exercise_Module.errorArr containsObject:exerciseModel]) {
                        NSMutableArray *errArr = RQ_Exercise_Module.errorArr.mutableCopy;
                        [errArr addObject:exerciseModel];
                        RQ_Exercise_Module.errorArr = errArr.copy;
                    }
                }
            }
            self.group2.itemViewModels = isAnswered? @[exerciseAnswerItemViewModel] : @[];
            self.group3.itemViewModels = ([userAnswer containsObject:@"预选Option"] && (exerciseModel.ydtQuestionModel.Type == 3))? @[exerciseOptionSureBtnItemViewModel] : @[];
            self.group4.itemViewModels = isAnswered? ( RQObjectIsNil(exerciseVideoExplainItemViewModel)? @[exercisExplainItemViewModel] : @[exerciseVideoExplainItemViewModel,exercisExplainItemViewModel]) : @[];
            
        }
        self.group4.headerHeight = (self.group4.itemViewModels.count > 0)? RQ_FIT_HORIZONTAL(50.f) : CGFLOAT_MIN;
        return @[self.group0, self.group1, self.group2, self.group3, self.group4];
    }] deliverOnMainThread];
}
     
#pragma mark - LazyLoad
- (RQCommonGroupViewModel *)group0 {
    if (!_group0) {
        _group0 = [RQCommonGroupViewModel groupViewModel];
        RQExerciseQuestionItemViewModel *exerciseQuestionItemViewModel = [[RQExerciseQuestionItemViewModel alloc] initWithRQExerciseModel:self.exerciseModel];
        _group0.itemViewModels = @[exerciseQuestionItemViewModel];
    }
    return _group0;
}

- (RQCommonGroupViewModel *)group1 {
    @weakify(self)
    if (!_group1) {
        _group1 = [RQCommonGroupViewModel groupViewModel];
        NSArray *allOptionsArr = [@[self.exerciseModel.ydtQuestionModel.An1,
                                    self.exerciseModel.ydtQuestionModel.An2,
                                    self.exerciseModel.ydtQuestionModel.An3,
                                    self.exerciseModel.ydtQuestionModel.An4,
                                  ].rac_sequence.signal filter:^BOOL(NSString *optionString) {
            return RQStringIsNotEmpty(optionString);
        }].toArray;
        _group1.itemViewModels = [allOptionsArr.rac_sequence.signal map:^id _Nullable(NSString *optionString) {
            @strongify(self)
            return [[RQExerciseOptionItemViewModel alloc] initWithRQExerciseModel:self.exerciseModel allOptionsArr:allOptionsArr optString:optionString];
        }].toArray;
    }
    return _group1;
}

- (RQCommonGroupViewModel *)group2 {
    if (!_group2) {
        _group2 = [RQCommonGroupViewModel groupViewModel];
    }
    return _group2;
}

- (RQCommonGroupViewModel *)group3 {
    if (!_group3) {
        _group3 = [RQCommonGroupViewModel groupViewModel];
    }
    return _group3;
}

- (RQExciseExplainHeaderGroupViewModel *)group4 {
    if (!_group4) {
        _group4 = [RQExciseExplainHeaderGroupViewModel groupViewModel];
    }
    return _group4;
}
@end