/*!
 * iOS SDK
 *
 * Tencent is pleased to support the open source community by making
 * Hippy available.
 *
 * Copyright (C) 2019 THL A29 Limited, a Tencent company.
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#import "HippyDevMenu.h"
#import "HippyEventDispatcher.h"
#import "HippyKeyCommands.h"
#import "HippyWebSocketProxy.h"
#import "HippyAssert.h"
#import "HippyUtils.h"
#import "HippyDefines.h"
#import "HippyBridge+ModuleManage.h"
#include <objc/runtime.h>

#if HIPPY_DEV

static NSString *const HippyShowDevMenuNotification = @"HippyShowDevMenuNotification";
static NSString *const HippyDevMenuSettingsKey = @"HippyDevMenu";

@implementation UIWindow (HippyDevMenu)

- (void)hippy_motionEnded:(__unused UIEventSubtype)motion withEvent:(UIEvent *)event {
    if (event.subtype == UIEventSubtypeMotionShake) {
        [[NSNotificationCenter defaultCenter] postNotificationName:HippyShowDevMenuNotification object:nil];
    }
}

@end

typedef NS_ENUM(NSInteger, HippyDevMenuType) { HippyDevMenuTypeButton, HippyDevMenuTypeToggle };

@interface HippyDevMenuItem ()

@property (nonatomic, assign, readonly) HippyDevMenuType type;
@property (nonatomic, copy, readonly) NSString *key;
@property (nonatomic, copy, readonly) NSString *title;
@property (nonatomic, copy, readonly) NSString *selectedTitle;
@property (nonatomic, copy) id value;

@end

@implementation HippyDevMenuItem {
    id _handler;  // block
}

- (instancetype)initWithType:(HippyDevMenuType)type
                         key:(NSString *)key
                       title:(NSString *)title
               selectedTitle:(NSString *)selectedTitle
                     handler:(id /* block */)handler {
    if ((self = [super init])) {
        _type = type;
        _key = [key copy];
        _title = [title copy];
        _selectedTitle = [selectedTitle copy];
        _handler = [handler copy];
        _value = nil;
    }
    return self;
}

+ (instancetype)buttonItemWithTitle:(NSString *)title handler:(void (^)(void))handler {
    return [[self alloc] initWithType:HippyDevMenuTypeButton key:nil title:title selectedTitle:nil handler:handler];
}

+ (instancetype)toggleItemWithKey:(NSString *)key
                            title:(NSString *)title
                    selectedTitle:(NSString *)selectedTitle
                          handler:(void (^)(BOOL selected))handler {
    return [[self alloc] initWithType:HippyDevMenuTypeToggle key:key title:title selectedTitle:selectedTitle handler:handler];
}

- (void)callHandler {
    switch (_type) {
        case HippyDevMenuTypeButton: {
            if (_handler) {
                ((void (^)(void))_handler)();
            }
            break;
        }
        case HippyDevMenuTypeToggle: {
            if (_handler) {
                ((void (^)(BOOL selected))_handler)([_value boolValue]);
            }
            break;
        }
    }
}

@end

@interface HippyDevMenu () <HippyBridgeModule, HippyInvalidating> {
    __weak UIAlertController *_actionSheet;
    NSMutableArray<HippyDevMenuItem *> *_extraMenuItems;
    NSUserDefaults *_defaults;
}

@end

@implementation HippyDevMenu

@synthesize bridge = _bridge;

HIPPY_EXPORT_MODULE()

+ (void)initialize {
    // We're swizzling here because it's poor form to override methods in a category,
    // however UIWindow doesn't actually implement motionEnded:withEvent:, so there's
    // no need to call the original implementation.
    HippySwapInstanceMethods([UIWindow class], @selector(motionEnded:withEvent:), @selector(hippy_motionEnded:withEvent:));
}

- (instancetype)init {
    if ((self = [super init])) {
        NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];

        [notificationCenter addObserver:self selector:@selector(showOnShake) name:HippyShowDevMenuNotification object:nil];

        _defaults = [NSUserDefaults standardUserDefaults];
        _shakeToShow = YES;
    }
    return self;
}

- (void)setBridge:(HippyBridge *)bridge {
    _bridge = bridge;

#if TARGET_OS_SIMULATOR || TARGET_OS_MACCATALYST
    if (bridge.debugMode) {
        HippyKeyCommands *commands = [HippyKeyCommands sharedInstance];
        __weak __typeof(self) weakSelf = self;
        
        // Toggle debug menu
        [commands registerKeyCommandWithInput:@"d"
                                modifierFlags:UIKeyModifierCommand
                                       action:^(__unused UIKeyCommand *command) {
            [weakSelf toggle];
        }];
    }
#endif /* TARGET_OS_SIMULATOR || TARGET_OS_MACCATALYST */
}

- (dispatch_queue_t)methodQueue {
    return dispatch_get_main_queue();
}

- (void)invalidate {
    [_actionSheet dismissViewControllerAnimated:YES completion:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)showOnShake {
    if (_shakeToShow) {
        [self show];
    }
}

- (void)toggle {
    if (!self.bridge.debugMode)
        return;
    if (_actionSheet) {
        [_actionSheet dismissViewControllerAnimated:YES completion:^(void) {
        }];
        _actionSheet = nil;
    } else {
        [self show];
    }
}

- (void)addItem:(HippyDevMenuItem *)item {
    [_extraMenuItems addObject:item];
}

- (NSArray<HippyDevMenuItem *> *)menuItems {
    NSMutableArray<HippyDevMenuItem *> *items = [NSMutableArray new];

    // Add built-in items
    __weak HippyDevMenu *weakSelf = self;
    [items addObject:[HippyDevMenuItem buttonItemWithTitle:@"Reload" handler:^{
        [weakSelf reload];
    }]];
    // Add extra items
    [items addObjectsFromArray:_extraMenuItems];
    return items;
}

HIPPY_EXPORT_METHOD(reload) {
    [_bridge requestReload];
}

HIPPY_EXPORT_METHOD(show) {
    if (_actionSheet || !_bridge || HippyRunningInAppExtension()) {
        return;
    }
    
    NSString *title = [NSString stringWithFormat:@"Hippy: Development (%@)", [_bridge moduleName]];
    // On larger devices we don't have an anchor point for the action sheet
    UIAlertControllerStyle style = [[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone ?
    UIAlertControllerStyleActionSheet : UIAlertControllerStyleAlert;
    _actionSheet = [UIAlertController alertControllerWithTitle:title
                                                       message:nil
                                                preferredStyle:style];
    
    NSArray<HippyDevMenuItem *> *items = [self menuItems];
    for (HippyDevMenuItem *item in items) {
        switch (item.type) {
            case HippyDevMenuTypeButton: {
                [_actionSheet addAction:[UIAlertAction actionWithTitle:item.title
                                                                 style:UIAlertActionStyleDefault
                                                               handler:^(__unused UIAlertAction *action) {
                    // Cancel button tappped.
                    [item callHandler];
                }]];
                break;
            }
            default:
                break;
        }
    }
    
    [_actionSheet addAction:[UIAlertAction actionWithTitle:@"Cancel"
                                                     style:UIAlertActionStyleCancel
                                                   handler:^(__unused UIAlertAction *action) {
    }]];
    
    [HippyPresentedViewController() presentViewController:_actionSheet animated:YES completion:nil];
}

@end

#else  // Unavailable when not in dev mode

@implementation HippyDevMenu

- (void)show {
}
- (void)reload {
}
- (void)addItem:(__unused NSString *)title handler:(__unused dispatch_block_t)handler {
}
- (void)addItem:(__unused HippyDevMenu *)item {
}

@end

#endif

@implementation HippyBridge (HippyDevMenu)

- (HippyDevMenu *)devMenu {
#if HIPPY_DEV
    return [self moduleForClass:[HippyDevMenu class]];
#else
    return nil;
#endif
}

@end