//
//  CameraViewController.m
//  AIIM
//
//  Created by qitewei on 2025/6/5.
//

#import "CameraViewController.h"

@interface CameraViewController ()
@property (nonatomic, strong) CameraUtility *cameraUtility;
@property (nonatomic, strong) UIView *previewView;
@property (nonatomic, strong) UIButton *captureButton;
@property (nonatomic, strong) UIButton *switchCameraButton;
@property (nonatomic, strong) UIButton *flashButton;
@property (nonatomic, strong) UIButton *closeButton;
@property (nonatomic, strong) UIProgressView *progressView;
@property (nonatomic, strong) UILabel *timeLabel;

@property (nonatomic, strong) UIImage * takePictrue;
@property (nonatomic, strong) NSURL * takeVideoURL;
@end

@implementation CameraViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setupUI];
    [self setupCamera];
    [self checkCameraPermission];
}

- (void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];
    self.previewView.frame = self.view.bounds;
    self.cameraUtility.previewLayer.frame = self.previewView.bounds;
}

- (void)dealloc {
    [self.cameraUtility stopRunning];
}

#pragma mark - 初始化设置

- (void)setupUI {
    self.view.backgroundColor = [UIColor blackColor];
    
    // 预览视图
    self.previewView = [[UIView alloc] initWithFrame:self.view.bounds];
    [self.view addSubview:self.previewView];
    
    // 关闭按钮
    self.closeButton = [UIButton buttonWithType:UIButtonTypeCustom];
    self.closeButton.frame = CGRectMake(20, STATUS_Height + 20, 44, 44);
    [self.closeButton setImage:[UIImage imageNamed:@"common_close_white"] forState:UIControlStateNormal];
    [self.closeButton addTarget:self action:@selector(closeButtonTapped) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.closeButton];
    
    // 切换摄像头按钮
    self.switchCameraButton = [UIButton buttonWithType:UIButtonTypeCustom];
    self.switchCameraButton.frame = CGRectMake(CGRectGetWidth(self.view.frame) - 64, STATUS_Height + 20, 44, 44);
    [self.switchCameraButton setImage:[UIImage imageNamed:@"switch_camera"] forState:UIControlStateNormal];
    [self.switchCameraButton addTarget:self action:@selector(switchCameraButtonTapped) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.switchCameraButton];
    
    // 闪光灯按钮
    self.flashButton = [UIButton buttonWithType:UIButtonTypeCustom];
    self.flashButton.frame = CGRectMake(CGRectGetWidth(self.view.frame) - 64, CGRectGetMaxY(self.switchCameraButton.frame) + 20, 44, 44);
    [self.flashButton setImage:[UIImage imageNamed:@"flash_off"] forState:UIControlStateNormal];
    [self.flashButton addTarget:self action:@selector(flashButtonTapped) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.flashButton];
    
    // 拍摄按钮
    CGFloat buttonWidth = 70;
    self.captureButton = [UIButton buttonWithType:UIButtonTypeCustom];
    self.captureButton.frame = CGRectMake((CGRectGetWidth(self.view.frame) - buttonWidth)/2, CGRectGetHeight(self.view.frame) - buttonWidth - 50, buttonWidth, buttonWidth);
    self.captureButton.backgroundColor = [UIColor whiteColor];
    self.captureButton.layer.cornerRadius = buttonWidth/2;
    self.captureButton.layer.masksToBounds = YES;
    self.captureButton.layer.borderWidth = 5;
    self.captureButton.layer.borderColor = [UIColor colorWithWhite:1 alpha:0.5].CGColor;
    [self.view addSubview:self.captureButton];
    
    // 长按手势识别
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
    longPress.minimumPressDuration = 0.3;
    [self.captureButton addGestureRecognizer:longPress];
    
    // 单击手势识别
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
    [self.captureButton addGestureRecognizer:tap];
    [tap requireGestureRecognizerToFail:longPress];
    
    // 进度条
    self.progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];
    self.progressView.frame = CGRectMake(20, CGRectGetMinY(self.captureButton.frame) - 30, CGRectGetWidth(self.view.frame) - 40, 3);
    self.progressView.progressTintColor = [UIColor greenColor];
    self.progressView.trackTintColor = [UIColor clearColor];
    self.progressView.progress = 0;
    self.progressView.hidden = YES;
    [self.view addSubview:self.progressView];
    
    // 时间标签
    self.timeLabel = [[UILabel alloc] initWithFrame:CGRectMake((CGRectGetWidth(self.view.frame) - 100)/2, CGRectGetMinY(self.progressView.frame) - 30, 100, 20)];
    self.timeLabel.textColor = [UIColor whiteColor];
    self.timeLabel.textAlignment = NSTextAlignmentCenter;
    self.timeLabel.font = [UIFont boldSystemFontOfSize:16];
    self.timeLabel.hidden = YES;
    [self.view addSubview:self.timeLabel];
}

- (void)setupCamera {
    self.cameraUtility = [[CameraUtility alloc] initWithPreviewView:self.previewView];
    self.cameraUtility.aspectRatioMode = CameraAspectRatioModeScreen; // 匹配屏幕比例
    self.cameraUtility.delegate = self;
}

#pragma mark - 权限检查

- (void)checkCameraPermission {
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    
    switch (status) {
        case AVAuthorizationStatusAuthorized:
            [self.cameraUtility startRunning];
            break;
            
        case AVAuthorizationStatusNotDetermined: {
            [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    if (granted) {
                        [self.cameraUtility startRunning];
                    } else {
                        [self showPermissionDeniedAlert];
                    }
                });
            }];
            break;
        }
            
        default:
            [self showPermissionDeniedAlert];
            break;
    }
}

- (void)showPermissionDeniedAlert {
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:NSLocalizedString(@"Permission_camera_title", @"")
                                                                   message:NSLocalizedString(@"Permission_camera_alter", @"")
                                                            preferredStyle:UIAlertControllerStyleAlert];
    
    [alert addAction:[UIAlertAction actionWithTitle:NSLocalizedString(@"Common_cancel", @"") style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        [self dismissViewControllerAnimated:YES completion:nil];
    }]];
    
    [alert addAction:[UIAlertAction actionWithTitle:NSLocalizedString(@"Common_goToSetting", @"") style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString] options:@{} completionHandler:nil];
    }]];
    
    [self presentViewController:alert animated:YES completion:nil];
}

#pragma mark - 按钮事件

- (void)closeButtonTapped {
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (void)switchCameraButtonTapped {
    [self.cameraUtility switchCamera];
}

- (void)flashButtonTapped {
    switch (self.cameraUtility.flashMode) {
        case CameraUtilityFlashModeOff:
            self.cameraUtility.flashMode = CameraUtilityFlashModeOn;
            [self.flashButton setImage:[UIImage imageNamed:@"flash_on"] forState:UIControlStateNormal];
            break;
            
        case CameraUtilityFlashModeOn:
            self.cameraUtility.flashMode = CameraUtilityFlashModeAuto;
            [self.flashButton setImage:[UIImage imageNamed:@"flash_auto"] forState:UIControlStateNormal];
            break;
            
        case CameraUtilityFlashModeAuto:
            self.cameraUtility.flashMode = CameraUtilityFlashModeOff;
            [self.flashButton setImage:[UIImage imageNamed:@"flash_off"] forState:UIControlStateNormal];
            break;
    }
}

- (void)handleTap:(UITapGestureRecognizer *)gesture {
    if (gesture.state == UIGestureRecognizerStateEnded) {
        [self.cameraUtility takePhoto];
    }
}

- (void)handleLongPress:(UILongPressGestureRecognizer *)gesture {
    switch (gesture.state) {
        case UIGestureRecognizerStateBegan:
            [self startVideoRecording];
            break;
            
        case UIGestureRecognizerStateEnded:
        case UIGestureRecognizerStateCancelled:
        case UIGestureRecognizerStateFailed:
            [self stopVideoRecording];
            break;
            
        default:
            break;
    }
}

#pragma mark - 视频录制控制

- (void)startVideoRecording {
    self.progressView.hidden = NO;
    self.timeLabel.hidden = NO;
    self.progressView.progress = 0;
    self.timeLabel.text = @"00:00";
    
    [UIView animateWithDuration:0.3 animations:^{
        self.captureButton.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.3, 1.3);
        self.captureButton.backgroundColor = [UIColor redColor];
    }];
    
    [self.cameraUtility startRecordingVideo];
}

- (void)stopVideoRecording {
    [UIView animateWithDuration:0.3 animations:^{
        self.captureButton.transform = CGAffineTransformIdentity;
        self.captureButton.backgroundColor = [UIColor whiteColor];
    } completion:^(BOOL finished) {
        self.progressView.hidden = YES;
        self.timeLabel.hidden = YES;
    }];
    
    [self.cameraUtility stopRecordingVideo];
}

#pragma mark - CameraUtilityDelegate

- (void)cameraUtilityDidFinishTakingPhoto:(UIImage *)photo {
    // 处理拍摄的照片
    self.takePictrue = photo;
    [self showPreviewWithImage:photo];
}

- (void)cameraUtilityDidFinishRecordingVideo:(NSURL *)videoURL {
    // 处理拍摄的视频
    self.takeVideoURL = videoURL;
    [self showPreviewWithVideo:videoURL];
}

- (void)cameraUtilityDidOccurError:(NSError *)error {
    // 处理错误
    NSLog(@"Camera error: %@", error.localizedDescription);
    [self showErrorAlert:error.localizedDescription];
}

- (void)cameraUtilityRecordingProgress:(CGFloat)progress {
    // 更新录制进度
    self.progressView.progress = progress;
    
    // 更新时间显示
    NSInteger seconds = (NSInteger)(progress * 60);
    self.timeLabel.text = [NSString stringWithFormat:@"00:%02ld", (long)seconds];
}

#pragma mark - 预览处理

- (void)showPreviewWithImage:(UIImage *)image {
    // 创建预览视图控制器
    UIViewController *previewVC = [[UIViewController alloc] init];
    previewVC.view.backgroundColor = [UIColor blackColor];
    
    // 添加图片视图
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:previewVC.view.bounds];
    imageView.contentMode = UIViewContentModeScaleAspectFit;
    imageView.image = image;
    [previewVC.view addSubview:imageView];
    
    // 添加操作按钮
    UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
    backButton.frame = CGRectMake(20, STATUS_Height + 20, 44, 44);
    [backButton setImage:[UIImage imageNamed:@"fanhui"] forState:UIControlStateNormal];
    [backButton addTarget:self action:@selector(dismissPreview) forControlEvents:UIControlEventTouchUpInside];
    [previewVC.view addSubview:backButton];
    
    UIButton *sendButton = [UIButton buttonWithType:UIButtonTypeCustom];
    sendButton.frame = CGRectMake(CGRectGetWidth(self.view.frame) - 100, CGRectGetHeight(self.view.frame) - 60, 80, 40);
    [sendButton setTitle:NSLocalizedString(@"Common_send", @"") forState:UIControlStateNormal];
    [sendButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    sendButton.backgroundColor = globalColor(GCTypeGreen);
    sendButton.layer.cornerRadius = 4;
    [sendButton addTarget:self action:@selector(sendImage:) forControlEvents:UIControlEventTouchUpInside];
    [previewVC.view addSubview:sendButton];
    
    // 显示预览
    previewVC.modalPresentationStyle = UIModalPresentationFullScreen;
    [self presentViewController:previewVC animated:YES completion:nil];
}

- (void)showPreviewWithVideo:(NSURL *)videoURL {
    // 创建预览视图控制器
    UIViewController *previewVC = [[UIViewController alloc] init];
    previewVC.view.backgroundColor = [UIColor blackColor];
    
    // 添加视频播放器
    AVPlayer *player = [AVPlayer playerWithURL:videoURL];
    AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
    playerLayer.frame = previewVC.view.bounds;
    [previewVC.view.layer addSublayer:playerLayer];
    [player play];
    
    // 添加操作按钮
    UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
    backButton.frame = CGRectMake(20, STATUS_Height + 20, 44, 44);
    [backButton setImage:[UIImage imageNamed:@"fanhui"] forState:UIControlStateNormal];
    [backButton addTarget:self action:@selector(dismissPreview) forControlEvents:UIControlEventTouchUpInside];
    [previewVC.view addSubview:backButton];
    
    UIButton *sendButton = [UIButton buttonWithType:UIButtonTypeCustom];
    sendButton.frame = CGRectMake(CGRectGetWidth(self.view.frame) - 100, CGRectGetHeight(self.view.frame) - 60, 80, 40);
    [sendButton setTitle:NSLocalizedString(@"Common_send", @"") forState:UIControlStateNormal];
    [sendButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    sendButton.backgroundColor = globalColor(GCTypeGreen);
    sendButton.layer.cornerRadius = 4;
    [sendButton addTarget:self action:@selector(sendVideo:) forControlEvents:UIControlEventTouchUpInside];
    [previewVC.view addSubview:sendButton];
    
    // 显示预览
    previewVC.modalPresentationStyle = UIModalPresentationFullScreen;
    [self presentViewController:previewVC animated:YES completion:nil];
}

#pragma mark - 预览操作

- (void)dismissPreview {
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (void)sendImage:(UIButton *)sender {
    // 这里实现图片发送逻辑
    [self dismissPreview];
    [self dismissViewControllerAnimated:YES completion:nil];
    !self.takePhotoFinishBlock ?: self.takePhotoFinishBlock(self.takePictrue);
}

- (void)sendVideo:(UIButton *)sender {
    // 这里实现视频发送逻辑
    [self dismissPreview];
    [self dismissViewControllerAnimated:YES completion:nil];
    !self.takeVideoFinishBlock ?: self.takeVideoFinishBlock(self.takeVideoURL);
}

#pragma mark - 辅助方法

- (CGFloat)safeAreaTop {
    if (@available(iOS 11.0, *)) {
        return self.view.safeAreaInsets.top;
    }
    return 20;
}

- (void)showErrorAlert:(NSString *)message {
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:NSLocalizedString(@"Common_wrong", @"")
                                                                   message:message
                                                            preferredStyle:UIAlertControllerStyleAlert];
    [alert addAction:[UIAlertAction actionWithTitle:NSLocalizedString(@"Common_confirm", @"") style:UIAlertActionStyleDefault handler:nil]];
    [self presentViewController:alert animated:YES completion:nil];
}

- (void)showMessage:(NSString *)message {
    UILabel *messageLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 150, 40)];
    messageLabel.center = CGPointMake(self.view.center.x, self.view.center.y - 100);
    messageLabel.backgroundColor = [UIColor colorWithWhite:0 alpha:0.7];
    messageLabel.textColor = [UIColor whiteColor];
    messageLabel.textAlignment = NSTextAlignmentCenter;
    messageLabel.text = message;
    messageLabel.layer.cornerRadius = 5;
    messageLabel.layer.masksToBounds = YES;
    [self.view addSubview:messageLabel];
    
    [UIView animateWithDuration:0.3 delay:1.5 options:UIViewAnimationOptionCurveEaseOut animations:^{
        messageLabel.alpha = 0;
    } completion:^(BOOL finished) {
        [messageLabel removeFromSuperview];
    }];
}

@end