/*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/

#import "RCTReloadCommand.h"

#import "RCTAssert.h"
#import "RCTKeyCommands.h"
#import "RCTUtils.h"

static NSHashTable<id<RCTReloadListener>> *listeners;
static NSLock *listenersLock;
static NSURL *bundleURL;

NSString *const RCTTriggerReloadCommandNotification = @"RCTTriggerReloadCommandNotification";
NSString *const RCTTriggerReloadCommandReasonKey = @"reason";
NSString *const RCTTriggerReloadCommandBundleURLKey = @"bundleURL";

void RCTRegisterReloadCommandListener(id<RCTReloadListener> listener)
{
if (!listenersLock) {
listenersLock = [NSLock new];
}
[listenersLock lock];
if (!listeners) {
listeners = [NSHashTable weakObjectsHashTable];
}
#if RCT_DEV
RCTAssertMainQueue(); // because registerKeyCommandWithInput: must be called on the main thread
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
[[RCTKeyCommands sharedInstance] registerKeyCommandWithInput:@"r"
modifierFlags:UIKeyModifierCommand
action:^(__unused UIKeyCommand *command) {
RCTTriggerReloadCommandListeners(@"Command + R");
}];
});
#endif
[listeners addObject:listener];
[listenersLock unlock];
}

void RCTTriggerReloadCommandListeners(NSString *reason)
{
[listenersLock lock];
[[NSNotificationCenter defaultCenter] postNotificationName:RCTTriggerReloadCommandNotification
object:nil
userInfo:@{
RCTTriggerReloadCommandReasonKey : RCTNullIfNil(reason),
RCTTriggerReloadCommandBundleURLKey : RCTNullIfNil(bundleURL)
}];

for (id<RCTReloadListener> l in [listeners allObjects]) {
[l didReceiveReloadCommand];
}
[listenersLock unlock];
}

void RCTReloadCommandSetBundleURL(NSURL *URL)
{
bundleURL = URL;
}