edu-saas-ios/MusicGradeExam/MusicGradeExam/UI/Classroom/View/MainContainer/ClassroomMainContainer.m

//
//  ClassroomMainContainer.m
//  StudentDaya
//
//  Created by Kyle on 2020/6/12.
//  Copyright © 2020 DayaMusic. All rights reserved.
//

#import "ClassroomMainContainer.h"
#import "RTCService.h"
#import "LocalRenderManager.h"

@interface ClassroomMainContainer ()

@property (nonatomic, strong) UIView *tapGestureView;
@property (nonatomic) CGRect currentVideoFrame;
@property (nonatomic) CGRect originVideoFrame;

@end

@implementation ClassroomMainContainer

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        self.backgroundColor = [UIColor colorWithHexString:@"141414" alpha:1];
        [self addSubview:self.emptyView];
        [self addSubview:self.videoBackView];
        [self.videoBackView addSubview:self.videoView];
        self.originVideoFrame = self.videoBackView.frame;
        self.currentVideoFrame = self.originVideoFrame;
    }
    return self;
}


- (void)didChangeRole:(Role)role {
    [self.emptyView changeRole:role];
}

- (void)containerViewRenderView:(RoomMember *)member {
    self.videoBackView.hidden = NO;
    self.videoView.hidden = NO;
    if([[ClassroomService sharedService].currentRoom.currentMemberId isEqualToString:member.userId]) {
        RoomMember *curMemeber =[ClassroomService sharedService].currentRoom.currentMember;
        [[RTCService sharedInstance] renderLocalVideoOnView:self.videoView cameraEnable:curMemeber.cameraEnable];
        [LocalRenderManager shareInstance].hadRenderMainView = YES;
    }else {
        [LocalRenderManager shareInstance].hadRenderMainView = NO;
        [[RTCService sharedInstance] exchangeRemoteUserAVStreamToNomalSteam:member.userId callback:^{
            [[RTCService sharedInstance] renderRemoteVideoOnView:self.videoView forUser:member.userId];
        }];
    }
    self.member = member;
}

- (void)cancelRenderView {
    [LocalRenderManager shareInstance].hadRenderMainView = NO;
    // 如何关闭了摄像头，可能导致videoView 遮挡控制事件
    [self updateVideoViewFrame:NO];
    self.videoBackView.hidden = YES;
}


#pragma mark - private method

- (void)updateVideoViewFrame:(BOOL)isFull {
    self.currentVideoFrame = self.frame;
    if(isFull) {
        [self.superview addSubview:self.videoBackView];
        [self.superview bringSubviewToFront:self.videoBackView];
        CGFloat width = 0.0f;
        CGFloat height = 0.0f;
        
        height = kScreen_Width / 4.0f * 3;
        if (height > kScreenHeight) {
            height = kScreenHeight;
        }
        width = height / 3.0f * 4;

        self.videoView.frame = CGRectMake((kScreenWidth - width) / 2.0f, 0, width, height);
    }else {
        [self.videoBackView removeFromSuperview];
        [self addSubview:self.videoBackView];
        self.currentVideoFrame = self.originVideoFrame;
        self.videoView.frame = CGRectMake(0, 0, CGRectGetWidth(self.currentVideoFrame), CGRectGetHeight(self.currentVideoFrame));
    }
    self.videoBackView.frame = self.currentVideoFrame;
}

#pragma mark - getter
- (UIView *)videoBackView {
    if (!_videoBackView) {
        CGFloat width = 0.0f;
        CGFloat height = 0.0f;
        height = kScreenHeight - 20;
        width = height / 3.0f * 4;
        if (width > kScreenWidth - 180) {
            width = kScreenWidth - 180;
            height = width / 4.0f * 3;
        }
        _videoBackView = [[UIView alloc] initWithFrame:CGRectMake(10, 10, width, height)];
        _videoBackView.backgroundColor = [UIColor colorWithHexString:@"141414" alpha:1];
    }
    return _videoBackView;
}


- (UIView *)videoView {
    if(!_videoView) {
        CGFloat width = 0.0f;
        CGFloat height = 0.0f;
        height = kScreenHeight - 20;
        width = height / 3.0f * 4;
        if (width > kScreenWidth - 180) {
            width = kScreenWidth - 180;
            height = width / 4.0f * 3;
        }
        _videoView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, width, height)];
    }
    return _videoView;
}

- (EmptyView *)emptyView {
    if (!_emptyView) {
        CGFloat width = 0.0f;
        CGFloat height = 0.0f;
        height = kScreenHeight - 20;
        width = height / 3.0f * 4;
        if (width > kScreenWidth - 180) {
            width = kScreenWidth - 180;
            height = width / 4.0f * 3;
        }
        _emptyView = [[EmptyView alloc] initWithFrame:CGRectMake(10, 10, width, height) role:[ClassroomService sharedService].currentRoom.currentMember.role];
    }
    return _emptyView;
}

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/

@end