//
//  LXDanMuTrackView.m
//  LXAnimationTest
//
//  Created by lianxiang on 2018/8/14.
//  Copyright © 2018年 com.giga.ios. All rights reserved.
//

#import "LXDanMuTrackView.h"

@implementation LXDanMuTrackView

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

-(void)dataConfig{
    
    _showingArray = [[NSMutableArray alloc] init];
    _waitShowArray = [[NSMutableArray alloc] init];
    
}

- (void)appendWithCustomView:(UIView *)view{
    
    view.frame = CGRectMake(self.frame.size.width,view.frame.origin.y, view.frame.size.width,view.frame.size.height);
    view.center = CGPointMake(view.center.x, TRACK_HEIGHT/2);
    if (_showingArray.count) {
        UIView *lastView = [_showingArray lastObject];
        //最右侧的那条弹幕还没有完全出现在屏幕中
        if (CGRectGetMaxX(lastView.frame) + TRACK_HORIZONTAL_PADDING > self.frame.size.width || _waitShowArray.count) {
            //把这条弹幕加到等待数组中
            [_waitShowArray addObject:view];
        }else{
            //加入轨道
            [self addSubview:view];
            //加入展示数组
            [_showingArray addObject:view];
            
        }
    }else{
        
        [self addSubview:view];
        [_showingArray addObject:view];
    }
}

- (void)moveViewWithSpeed:(float)speed{
    //正在展示的弹幕自减一次
    for (UIView *view in _showingArray) {
        view.frame = CGRectMake(view.frame.origin.x - speed, view.frame.origin.y, view.frame.size.width, view.frame.size.height);
        
    }
    //正在展示的弹幕
    if (_showingArray.count){
        UIView *firstView = [_showingArray firstObject];
        UIView *lastView = [_showingArray lastObject];
        
        if (CGRectGetMaxX(firstView.frame) < 0) {
            //已移除屏幕 remove
            [firstView removeFromSuperview];
            [_showingArray removeObjectAtIndex:0];
            
        }
        if (_waitShowArray.count) {
            //最右侧的view 已经完全出现
            if (CGRectGetMaxX(lastView.frame) + TRACK_HORIZONTAL_PADDING  <= self.frame.size.width) {
                //转移数组
                [_showingArray addObject:[_waitShowArray firstObject]];
                [_waitShowArray removeObjectAtIndex:0];
                [self addSubview:[_showingArray lastObject]];
                
            }
        }
    }
}
- (float)rightOutScreenWidth
{
    float outScreenWidth = 0.0;
    //如果等待数组中有值
    if (_waitShowArray.count)
    {
        //先遍历所有等待数组中的view，累加长度和间距
        for (UIView *view in _waitShowArray)
        {
            outScreenWidth += view.frame.size.width + TRACK_HORIZONTAL_PADDING;
        }
    }
    
    //如果展示数组中有值
    if (_showingArray.count)
    {
        //拿出最右侧的view
        UIView *lastView = [_showingArray lastObject];
        //算出出屏宽
        float rightOutWidth = CGRectGetMaxX(lastView.frame) - self.frame.size.width;
        if (rightOutWidth < 0)
        {
            rightOutWidth = 0;
        }
        outScreenWidth += rightOutWidth;
    }
    
    return outScreenWidth;
}

//清理轨道
- (void)cleanTrack
{
    for (UIView *view in _showingArray)
    {
        [view removeFromSuperview];
    }
    [_showingArray removeAllObjects];
    [_waitShowArray removeAllObjects];
    
}
@end