//
//  FKSegmentControl.m
//  FirstLink
//
//  Created by jack on 16/5/10.
//  Copyright © 2016年 FirstLink. All rights reserved.
//

#import "FKSegmentControl.h"

@interface FKSegmentItemView : UIControl
@property (nonatomic, strong) UILabel *titleLabel;
@end

@implementation FKSegmentItemView

- (instancetype)initWithFrame:(CGRect)frame{
    if (self = [super initWithFrame:frame]) {
        [self addAllSubviews];
    }
    return self;
}

- (void)addAllSubviews{
    [self addSubview:self.titleLabel];
    [self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.center.equalTo(self);
    }];
}

- (void)setSelected:(BOOL)selected{
    
    [super setSelected:selected];
    
    if (selected) {
        self.backgroundColor = UIColorFromRGB(0xccccccc);
//        self.titleLabel.textColor = UIColorFromRGB(0x4a4a4a);
    }else{
        self.backgroundColor = UIColorFromRGB(0xffffff);
//        self.titleLabel.textColor = UIColorFromRGB(0x9b9b9b);
    }
}

- (UILabel *)titleLabel{
    if (_titleLabel == nil) {
        _titleLabel = [[UILabel alloc]init];
        _titleLabel.font = [UIFont systemFontOfSize:14];
        _titleLabel.textColor = UIColorFromRGB(0x4a4a4a);
    }
    return _titleLabel;
}

@end

////////////////////////////////////////////////////////////////////////////////////////////////////////////

@interface FKSegmentControl ()
@property (nonatomic, strong) NSMutableArray *itemViewArrayM;
@end

@implementation FKSegmentControl

- (instancetype)initWithIndexTitles:(NSArray *)titleArray{
    if (self = [super init]) {
        
        self.titleArray = titleArray;
        
        self.layer.cornerRadius = 3.0f;
        self.layer.borderColor = UIColorFromRGB(0xccccccc).CGColor;
        self.layer.borderWidth = 0.5;
        self.clipsToBounds = YES;
        
        [self buildSubviewWithTitleArray:self.titleArray];
    }
    return self;
}

- (void)buildSubviewWithTitleArray:(NSArray *)titleArray{
    
    if (titleArray.count == 0) return;
    
    for (UIView *view in self.subviews) {
        if ([view isKindOfClass:[FKSegmentItemView class]]){
            [view removeFromSuperview];
        }
    }
    
    for (FKSegmentItemView *itemView in self.itemViewArrayM) {
        [itemView setSelected:NO];
    }
    
    while (self.itemViewArrayM.count < titleArray.count) {
        FKSegmentItemView *itemView = [[FKSegmentItemView alloc]init];
        
        [itemView addTarget:self
                     action:@selector(clickItemView:)
           forControlEvents:UIControlEventTouchUpInside];
        
        [self.itemViewArrayM addObject:itemView];
    }
    
    UIView *uperView = nil;
    for (NSInteger i = 0; i < titleArray.count; i++) {
        FKSegmentItemView *itemView = self.itemViewArrayM[i];
        itemView.titleLabel.text = titleArray[i];
        itemView.selected = NO;
        if (i == self.defaultSelectIndex) itemView.selected = YES;
        
        [self addSubview:itemView];
        [itemView mas_makeConstraints:^(MASConstraintMaker *make) {
            if (i == 0){
                make.left.equalTo(self);
            }else if (i == titleArray.count - 1){
                make.left.equalTo(uperView.mas_right);
                make.right.equalTo(self);
            }else{
                make.left.equalTo(uperView.mas_right);
                make.right.equalTo(self);
            }
            
            if (uperView){
                make.width.equalTo(uperView);
            }
            make.top.bottom.equalTo(self);
        }];
        
        uperView = itemView;
    }
    
}

- (void)clickItemView:(FKSegmentItemView *)sender{
    
    if (sender.selected) return;
    
    [self resetAllSelectedState];
    sender.selected = YES;
    
    NSUInteger index = [self.itemViewArrayM indexOfObject:sender];
    if (self.changeIndex){
        self.changeIndex(index);
    }
}

- (void)resetAllSelectedState{
    for (FKSegmentItemView *itemView in self.subviews) {
        if ([itemView isKindOfClass:[FKSegmentItemView class]]){
            itemView.selected = NO;
        }
    }
}

- (NSMutableArray *)itemViewArrayM{
    if (_itemViewArrayM == nil) {
        _itemViewArrayM = [[NSMutableArray alloc]init];
    }
    return _itemViewArrayM;
}

@end