//
//  WebViewController.m
//  AIIM
//
//  Created by on 2025/10/23.
//

#import "WebViewController.h"
#import <WebKit/WebKit.h>

@interface WebViewController () <WKNavigationDelegate, WKUIDelegate>

@property (nonatomic, strong) WKWebView *webView;
@property (nonatomic, strong) UIProgressView *progressView;
@property (nonatomic, strong) UIButton *backButton;
@property (nonatomic, strong) UILabel *titleLabel;

@end

@implementation WebViewController

#pragma mark - Lifecycle

- (instancetype)initWithURL:(NSURL *)url {
    return [self initWithURL:url title:nil];
}

- (instancetype)initWithURL:(NSURL *)url title:(NSString *)title {
    self = [super init];
    if (self) {
        _url = url;
        self.title = title;
        self.hidesBottomBarWhenPushed = YES;
    }
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self setupUI];
    [self setupNavigationBar];
    [self setupWebView];
    
    if (self.url) {
        [self loadURL:self.url];
    }
}

- (void)dealloc {
    [self.webView removeObserver:self forKeyPath:@"estimatedProgress"];
    [self.webView removeObserver:self forKeyPath:@"title"];
    [self.webView removeObserver:self forKeyPath:@"canGoBack"];
    [self.webView removeObserver:self forKeyPath:@"canGoForward"];
}

#pragma mark - UI Setup

- (void)setupUI {
    self.view.backgroundColor = [UIColor blackColor];
    
}

- (void)setupWebView {
    // 配置 WKWebView
    WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
    configuration.allowsInlineMediaPlayback = YES;
    configuration.mediaTypesRequiringUserActionForPlayback = WKAudiovisualMediaTypeNone;
    
    // 创建 WKWebView
    self.webView = [[WKWebView alloc] initWithFrame:CGRectZero configuration:configuration];
    self.webView.navigationDelegate = self;
    self.webView.UIDelegate = self;
    self.webView.allowsBackForwardNavigationGestures = YES;
    
    [self.view addSubview:self.webView];
    [self.webView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.bottom.equalTo(self.view);
        make.top.equalTo(self.titleLabel.mas_bottom).mas_offset(0);
    }];
    
    // 添加 KVO 监听
    [self.webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionNew context:nil];
    [self.webView addObserver:self forKeyPath:@"title" options:NSKeyValueObservingOptionNew context:nil];
    [self.webView addObserver:self forKeyPath:@"canGoBack" options:NSKeyValueObservingOptionNew context:nil];
    [self.webView addObserver:self forKeyPath:@"canGoForward" options:NSKeyValueObservingOptionNew context:nil];
}

- (void)setupNavigationBar {

    self.titleLabel = [UILabel new];
    self.titleLabel.text = self.title;
    self.titleLabel.textColor = [UIColor whiteColor];
    self.titleLabel.font = SYSBFONT(18);
    [self.view addSubview:self.titleLabel];
    [self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerX.equalTo(self.view);
        make.width.mas_lessThanOrEqualTo(200);
        make.top.equalTo(self.view).mas_offset(STATUS_Height);
        make.height.mas_equalTo(44);
    }];
    
    self.backButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [self.backButton setImage:kImageMake(@"fanhui") forState:UIControlStateNormal];
    [self.backButton addTarget:self action:@selector(goBack) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.backButton];
    [self.backButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.view).mas_offset(10);
        make.centerY.equalTo(self.titleLabel);
        make.size.mas_equalTo(CGSizeMake(32, 32));
    }];
    
    
    // 进度条
    self.progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];
    self.progressView.progressTintColor = globalColor(GCTypeGreen);
    self.progressView.trackTintColor = [UIColor clearColor];
    self.progressView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:self.progressView];
    
    [self.progressView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.equalTo(self.view);
        make.top.equalTo(self.titleLabel.mas_bottom).mas_offset(0);
        make.height.mas_equalTo(2);
    }];
}

#pragma mark - Actions

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

- (void)goBack {
    if ([self.webView canGoBack]) {
        [self.webView goBack];
    } else {
        [self.navigationController popViewControllerAnimated:YES];
    }
}

#pragma mark - Private Methods

- (void)loadURL:(NSURL *)url {
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [self.webView loadRequest:request];
}


#pragma mark - KVO

- (void)observeValueForKeyPath:(NSString *)keyPath
                      ofObject:(id)object
                        change:(NSDictionary<NSKeyValueChangeKey,id> *)change
                       context:(void *)context {
    
    if ([keyPath isEqualToString:@"estimatedProgress"]) {
        // 更新进度条
        float progress = [[change objectForKey:NSKeyValueChangeNewKey] floatValue];
        [self.progressView setProgress:progress animated:YES];
        
        // 进度完成时隐藏进度条
        if (progress >= 1.0) {
            dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                self.progressView.hidden = YES;
            });
        } else {
            self.progressView.hidden = NO;
        }
    }
    else if ([keyPath isEqualToString:@"title"]) {
        NSString *title = [change objectForKey:NSKeyValueChangeNewKey];
        self.title = title.length > 0 ? title : @"网页";
        self.titleLabel.text = self.title;
    }
    else if ([keyPath isEqualToString:@"canGoBack"] || [keyPath isEqualToString:@"canGoForward"]) {
        // 更新导航按钮状态
        
    }
}

#pragma mark - WKNavigationDelegate

- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {
    self.progressView.hidden = NO;
}

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
    
}

- (void)webView:(WKWebView *)webView didFailNavigation:(WKNavigation *)navigation withError:(NSError *)error {
    if (error.code != NSURLErrorCancelled) {
        UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"加载失败"
                                                                       message:error.localizedDescription
                                                                preferredStyle:UIAlertControllerStyleAlert];
        
        UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"确定"
                                                           style:UIAlertActionStyleDefault
                                                         handler:nil];
        [alert addAction:okAction];
        
        [self presentViewController:alert animated:YES completion:nil];
    }
}

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
    
    NSURL *url = navigationAction.request.URL;
    
    // 处理特殊 URL scheme
    if (![url.scheme isEqualToString:@"http"] && ![url.scheme isEqualToString:@"https"]) {
        // 尝试打开外部应用
        if ([[UIApplication sharedApplication] canOpenURL:url]) {
            [[UIApplication sharedApplication] openURL:url options:@{} completionHandler:nil];
        }
        decisionHandler(WKNavigationActionPolicyCancel);
        return;
    }
    
    decisionHandler(WKNavigationActionPolicyAllow);
}

@end