#import "GoogleWrapper.h"
#import <UIKit/UIKit.h>
#import <GoogleSignIn/GoogleSignIn.h>
#import "platform/apple/JsbBridgeWrapper.h"
#include "application/ApplicationManager.h"
#include "application/BaseApplication.h"
#include "base/Scheduler.h"
#include "engine/BaseEngine.h"

@interface GoogleWrapper ()
@property(nonatomic) BOOL initialized;
@property(nonatomic) BOOL loginPending;
@end
@implementation GoogleWrapper
+ (instancetype)shared {
    static GoogleWrapper *instance;
    static dispatch_once_t once;
    dispatch_once(&once, ^{ instance = [GoogleWrapper new]; });
    return instance;
}
- (void)registerBridge {
    // Must be capture-free: Creator 3.8.8's MRC bridge releases this block.
    static OnScriptEventListener const listener = ^(NSString *payload) {
        dispatch_async(dispatch_get_main_queue(), ^{ [[GoogleWrapper shared] handlePayload:payload]; });
    };
    [[JsbBridgeWrapper sharedInstance] addScriptEventListener:@"google.request" listener:listener];
}
- (BOOL)handleURL:(NSURL *)url { return [GIDSignIn.sharedInstance handleURL:url]; }
- (void)reply:(NSDictionary *)request data:(NSDictionary *)data cancelled:(BOOL)cancelled error:(NSString *)error {
    NSMutableDictionary *response = [@{@"requestId": request[@"requestId"], @"method": request[@"method"],
        @"success": @(!error), @"cancelled": @(cancelled)} mutableCopy];
    if (data) response[@"data"] = data;
    if (error) response[@"error"] = @{@"code": @"GOOGLE_IOS_ERROR", @"message": error};
    NSData *json = [NSJSONSerialization dataWithJSONObject:response options:0 error:nil];
    NSString *payload = [[NSString alloc] initWithData:json encoding:NSUTF8StringEncoding];
    auto app = CC_CURRENT_APPLICATION();
    if (!app || !app->getEngine() || !payload) return;
    app->getEngine()->getScheduler()->performFunctionInCocosThread([payload]() {
        [[JsbBridgeWrapper sharedInstance] dispatchEventToScript:@"google.response" arg:payload];
    });
}
- (void)handlePayload:(NSString *)payload {
    id decoded = [NSJSONSerialization JSONObjectWithData:[payload dataUsingEncoding:NSUTF8StringEncoding] options:0 error:nil];
    if (![decoded isKindOfClass:NSDictionary.class]) return;
    NSDictionary *request = decoded;
    if (![request[@"requestId"] isKindOfClass:NSString.class] || ![request[@"method"] isKindOfClass:NSString.class]) return;
    NSString *method = request[@"method"];
    @try {
        if (self.loginPending) {
            [self reply:request data:nil cancelled:NO error:@"Google 登录仍在进行中。"];
        } else if ([method isEqualToString:@"init"]) {
            NSDictionary *params = [request[@"params"] isKindOfClass:NSDictionary.class] ? request[@"params"] : @{};
            NSString *clientID = [NSBundle.mainBundle objectForInfoDictionaryKey:@"GIDClientID"];
            NSString *serverID = params[@"webClientId"];
            if (![clientID isKindOfClass:NSString.class] || ![clientID hasSuffix:@".apps.googleusercontent.com"] ||
                [clientID containsString:@"YOUR_"] || ![serverID isKindOfClass:NSString.class] ||
                ![serverID hasSuffix:@".apps.googleusercontent.com"]) {
                [self reply:request data:nil cancelled:NO error:@"请配置 Info.plist 的 GIDClientID（iOS）及 AppConfig.GoogleID（Web）。"];
                return;
            }
            NSArray *parts = [[clientID componentsSeparatedByString:@"."] reverseObjectEnumerator].allObjects;
            NSString *scheme = [parts componentsJoinedByString:@"."];
            BOOL found = NO;
            for (NSDictionary *type in [NSBundle.mainBundle objectForInfoDictionaryKey:@"CFBundleURLTypes"]) {
                if ([type[@"CFBundleURLSchemes"] containsObject:scheme]) found = YES;
            }
            if (!found) {
                [self reply:request data:nil cancelled:NO error:@"Info.plist 缺少 Google iOS Client ID 对应的反向 URL Scheme。"];
                return;
            }
            GIDSignIn.sharedInstance.configuration = [[GIDConfiguration alloc] initWithClientID:clientID serverClientID:serverID];
            self.initialized = YES;
            [self reply:request data:@{} cancelled:NO error:nil];
        } else if (!self.initialized) {
            [self reply:request data:nil cancelled:NO error:@"Google SDK 未初始化。"];
        } else if ([method isEqualToString:@"logout"]) {
            [GIDSignIn.sharedInstance signOut];
            [self reply:request data:@{} cancelled:NO error:nil];
        } else if ([method isEqualToString:@"login"]) {
            UIViewController *presenter = UIApplication.sharedApplication.delegate.window.rootViewController;
            while (presenter.presentedViewController) presenter = presenter.presentedViewController;
            if (!presenter || UIApplication.sharedApplication.applicationState != UIApplicationStateActive) {
                [self reply:request data:nil cancelled:NO error:@"请在游戏前台且系统授权弹窗关闭后重试 Google 登录。"];
                return;
            }
            self.loginPending = YES;
            [GIDSignIn.sharedInstance signInWithPresentingViewController:presenter completion:^(GIDSignInResult *result, NSError *error) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    self.loginPending = NO;
                    BOOL cancelled = [error.domain isEqualToString:kGIDSignInErrorDomain] && error.code == kGIDSignInErrorCodeCanceled;
                    if (error) {
                        [self reply:request data:nil cancelled:cancelled error:cancelled ? nil : error.localizedDescription];
                        return;
                    }
                    GIDGoogleUser *user = result.user;
                    if (!user.idToken.tokenString.length) {
                        [self reply:request data:nil cancelled:NO error:@"Google 未返回 ID Token。"];
                        return;
                    }
                    [self reply:request data:@{@"idToken": user.idToken.tokenString,
                        @"userId": user.userID ?: @"", @"displayName": user.profile.name ?: @"",
                        @"email": user.profile.email ?: @""} cancelled:NO error:nil];
                });
            }];
        } else {
            [self reply:request data:nil cancelled:NO error:@"不支持的 Google 方法。"];
        }
    } @catch (NSException *exception) {
        if ([method isEqualToString:@"login"]) self.loginPending = NO;
        [self reply:request data:nil cancelled:NO error:exception.reason ?: @"Google SDK 调用失败。"];
    }
}
@end