/**

* iOS specific timer functions implementation.

*/

var timeoutCallbacks = {};

class TimerTargetImpl extends NSObject {

static new(): TimerTargetImpl {

return <TimerTargetImpl>super.new();

}

private _callback: Function;

public initWithCallback(callback: Function): TimerTargetImpl {

this._callback = callback;

return this;

}

public tick(timer): void {

this._callback();

}

public static ObjCExposedMethods = {

"tick": { returns: interop.types.void, params: [NSTimer] }

};

}

function createTimerAndGetId(callback: Function, milliseconds: number, shouldRepeat: boolean): number {

var id = new Date().getUTCMilliseconds();

var timerTarget = TimerTargetImpl.new().initWithCallback(callback);

var timer = NSTimer.scheduledTimerWithTimeIntervalTargetSelectorUserInfoRepeats(milliseconds / 1000, timerTarget, "tick", null, shouldRepeat);

if (!timeoutCallbacks[id]) {

timeoutCallbacks[id] = timer;

}

return id;

}

export function setTimeout(callback: Function, milliseconds = 0): number {

return createTimerAndGetId(callback, milliseconds, false);

}

export function clearTimeout(id: number): void {

if (timeoutCallbacks[id]) {

timeoutCallbacks[id].invalidate();

timeoutCallbacks[id] = null;

}

}

export function setInterval(callback: Function, milliseconds = 0): number {

return createTimerAndGetId(callback, milliseconds, true);

}

export var clearInterval = clearTimeout;