//
//  RQExerciseOptionItemViewModel.m
//  SDJK
//
//  Created by 张嵘 on 2021/8/12.
//

#import "RQExerciseOptionItemViewModel.h"

@interface RQExerciseOptionItemViewModel ()
@property (nonatomic, readwrite, strong) RQExerciseModel *exerciseModel;
@property (nonatomic, readwrite, assign) RQExerciseOptionItemType exerciseOptionItemType;
@property (nonatomic, readwrite, strong) NSMutableAttributedString *optsString;
@property (nonatomic, readwrite, assign) RQExerciseType exerciseType;

@end

@implementation RQExerciseOptionItemViewModel
/// init
- (instancetype)initWithRQExerciseModel:(RQExerciseModel *)exerciseModel opts:(NSString *)opts RQExerciseOptionItemType:(RQExerciseOptionItemType)exerciseOptionItemType exerciseType:(RQExerciseType)exerciseType {
    if (self = [super init]) {
        self.exerciseModel = exerciseModel;
        self.exerciseOptionItemType = exerciseOptionItemType;
        self.exerciseType = exerciseType;
        opts = [opts containsString:@"×"]? @"错误" : ([opts containsString:@"√"]? @"正确" : opts);
        self.optsString = [[NSMutableAttributedString alloc] initWithString:opts];
        UIColor *noKeywordColor = RQ_MAIN_LINE_COLOR_1;
        switch (exerciseOptionItemType) {
            case RQExerciseOptionItemType_Correct_CorrectOption:
            case RQExerciseOptionItemType_Error_CorrectOption:{
                noKeywordColor = RQ_MAIN_TEXT_COLOR_GREEN;
            }
                break;
                
            case RQExerciseOptionItemType_Correct_ErrorOption:
            case RQExerciseOptionItemType_Error_ErrorOption:{
                noKeywordColor = RQ_MAIN_TEXT_COLOR_RED;
            }
                break;
                
            case RQExerciseOptionItemType_Multiple_Primary: {
                noKeywordColor = RQ_MAIN_COLOR;
            }
                break;
                
            default: {
                noKeywordColor = RQ_MAIN_TEXT_COLOR_1;
            }
                break;
        }
        
        if (RQStringIsNotEmpty(exerciseModel.answerkeyword) && exerciseModel.isShowSkillExplanation) {
            [[[exerciseModel.answerkeyword componentsSeparatedByString:@"-"].rac_sequence.signal deliverOnMainThread] subscribeNext:^(NSString * _Nullable answerkeyword) {
                NSRange targetRange = NSMakeRange(0, opts.length);
                NSRange range = targetRange;
                [_optsString addAttribute:NSForegroundColorAttributeName value:noKeywordColor range:range];
                while (true) {
                    range = [opts rangeOfString:answerkeyword options:NSLiteralSearch range:targetRange];
                    if (range.location != NSNotFound) {
                        targetRange = NSMakeRange(NSMaxRange(range), opts.length-NSMaxRange(range));
                        
                        [_optsString addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:RQ_Exercise_Module.exerciseFontSize + 2] range:range];
                        [_optsString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:RQ_Exercise_Module.exerciseFontSize] range:targetRange];
                        [_optsString addAttribute:NSForegroundColorAttributeName value:(exerciseModel.answerResultsType !=  RQAnswerResultsType_Unanswered)? noKeywordColor : RQ_MAIN_TEXT_COLOR_RED range:range];
                        [_optsString addAttribute:NSForegroundColorAttributeName value:noKeywordColor range:targetRange];
                        
                    } else {
                        break;
                    }
                }
                
            } completed:^{
                
            }];

        } else {
            [_optsString addAttribute:NSForegroundColorAttributeName value:noKeywordColor range:NSMakeRange(0, opts.length)];
        }
    }
        
    
    
    
    return self;
}

- (NSString *)itemClassName {
    return @"RQExerciseOptionCell";
}
@end