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

#import "LXDanMuManager.h"
#import "LXDanMuTrackView.h"

@implementation LXDanMuManager

+ (LXDanMuManager *)shareInstance{
    static LXDanMuManager *managerInstance = nil;
    static dispatch_once_t once;
    dispatch_once(&once, ^{
        managerInstance = [[self alloc] init];
    });
    return  managerInstance;
}

- (void)createDanmuWithTrackSpeedArray:(NSArray *)trackSpeedArray centerY:(float)centerY trackWidth:(float)trackWidth showInView:(UIView *)inView{
    _superView = inView;
    _trackSpeedArray = trackSpeedArray;
    _centerY = centerY;
    _trackWidth = trackWidth;
    _trackArray = [[NSMutableArray alloc] init];
    [self initUI];
}

-(void)initUI{
    _baseView = [[UIView alloc] initWithFrame:CGRectMake(0, 0,_trackWidth, 0)];
    _baseView.userInteractionEnabled = NO;
    [_superView addSubview:_baseView];
    
    for (int i = 0; i<_trackSpeedArray.count; i++) {
        
        LXDanMuTrackView *trackView  = [[LXDanMuTrackView alloc] initWithFrame:CGRectMake(0, (TRACK_HEIGHT + TRACK_VERTICAL_PADDING) * i, _baseView.frame.size.width, TRACK_HEIGHT)];
        [_baseView addSubview:trackView];
        [_trackArray addObject:trackView];
        if (_trackSpeedArray.count - 1 == i) {
            _baseView.frame = CGRectMake(_baseView.frame.origin.x, _baseView.frame.origin.y, _baseView.frame.size.width,CGRectGetMaxY(trackView.frame));
            _baseView.center = CGPointMake(_baseView.center.x, _centerY);
        }
    }
}

-(void)start{
    
    if (_timer) {
        return;
    }
    _timer = [NSTimer timerWithTimeInterval:0.01 target:self selector:@selector(startAction) userInfo:nil repeats:YES];
    [[NSRunLoop currentRunLoop] addTimer:_timer forMode:NSRunLoopCommonModes];

}

- (void)pause{
    [_timer invalidate];
    _timer = nil;
}

- (void)stop{
    
    [_timer invalidate];
    _timer = nil;
    for (LXDanMuTrackView *trackView in _trackArray) {
        [trackView cleanTrack];
    }
}

- (void)destory{
    
    [_timer invalidate];
    _timer = nil;
    for (LXDanMuTrackView * trackView in _trackArray) {
        [trackView cleanTrack];
        [trackView removeFromSuperview];
    }
    [_trackArray removeAllObjects];
    [_baseView removeFromSuperview];
    _trackSpeedArray = nil;
    _superView = nil;
    _baseView = nil;
    _trackArray = nil;
    
}

-(void)startAction{
    
    for (int i = 0; i < _trackArray.count; i++) {
        //执行轨道定时器方法
        LXDanMuTrackView *trackView = _trackArray[i];
        [trackView moveViewWithSpeed:[_trackSpeedArray[i] floatValue]];
    
    }
}

-(UIView *)baseView{
    if (!_baseView) {
        _baseView = [[UIView alloc] initWithFrame:CGRectMake(0, 0,_trackWidth, 0)];
        
    }
    return _baseView;
}

//自定义的view（注意，最高不能超过轨道的高，会出问题）
- (void)appendDanMuWithCustomView:(UIView *)customView toTrackIndex:(NSInteger)trackIndex
{
    //trackIndex 插入弹幕的轨道（为-1则代表自动寻找最不拥挤的轨道插入）
    NSInteger realTrackIndex = trackIndex;
    if (realTrackIndex == -1) {
        realTrackIndex = [self findTheMinTotalWidthTrack];
    }
    LXDanMuTrackView *trackView = _trackArray[realTrackIndex];
    [trackView appendWithCustomView:customView];
    
}

/**
 找到最短右侧出屏幕和等待数组总长度最短的轨道序号
 
 @return 轨道的序号
 */

- (int)findTheMinTotalWidthTrack
{
    LXDanMuTrackView *firstTrackView = _trackArray[0];
    int minWidthIndex = 0;
    float minWidth = [firstTrackView rightOutScreenWidth];
    for (int i = 0; i<_trackArray.count; i++)
    {
        LXDanMuTrackView *trackView = _trackArray[i];
        float trackRightOutScreenWidth = [trackView rightOutScreenWidth];
        if (trackRightOutScreenWidth < minWidth)
        {
            minWidth = trackRightOutScreenWidth;
            minWidthIndex = i;
        }
    }
    return minWidthIndex;
}

@end