/*
* Copyright (C) 2015 - 2016, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.io>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
*	*	Redistributions of source code must retain the above copyright notice, this
*		list of conditions and the following disclaimer.
*
*	*	Redistributions in binary form must reproduce the above copyright notice,
*		this list of conditions and the following disclaimer in the documentation
*		and/or other materials provided with the distribution.
*
*	*	Neither the name of Material nor the names of its
*		contributors may be used to endorse or promote products derived from
*		this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

import UIKit

public class MaterialPulseView : MaterialView {
	/// An Array of pulse layers.
	public private(set) lazy var pulseLayers: Array<CAShapeLayer> = Array<CAShapeLayer>()
	
	/// The opcaity value for the pulse animation.
	@IBInspectable public var pulseOpacity: CGFloat = 0.25
	
	/// The color of the pulse effect.
	@IBInspectable public var pulseColor: UIColor = MaterialColor.grey.base
	
	/// The type of PulseAnimation.
	public var pulseAnimation: PulseAnimation = .AtPointWithBacking {
		didSet {
			visualLayer.masksToBounds = .CenterRadialBeyondBounds != pulseAnimation
		}
	}
	
	/**
	Triggers the pulse animation.
	- Parameter point: A Optional point to pulse from, otherwise pulses
	from the center.
	*/
	public func pulse(point: CGPoint? = nil) {
		let p: CGPoint = nil == point ? CGPointMake(CGFloat(width / 2), CGFloat(height / 2)) : point!
		MaterialAnimation.pulseExpandAnimation(layer, visualLayer: visualLayer, pulseColor: pulseColor, pulseOpacity: pulseOpacity, point: p, width: width, height: height, pulseLayers: &pulseLayers, pulseAnimation: pulseAnimation)
		MaterialAnimation.delay(0.35) { [weak self] in
			if let s: MaterialPulseView = self {
				MaterialAnimation.pulseContractAnimation(s.layer, visualLayer: s.visualLayer, pulseColor: s.pulseColor, pulseLayers: &s.pulseLayers, pulseAnimation: s.pulseAnimation)
			}
		}
	}
	
	/**
	A delegation method that is executed when the view has began a
	touch event.
	- Parameter touches: A set of UITouch objects.
	- Parameter event: A UIEvent object.
	*/
	public override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
		super.touchesBegan(touches, withEvent: event)
		MaterialAnimation.pulseExpandAnimation(layer, visualLayer: visualLayer, pulseColor: pulseColor, pulseOpacity: pulseOpacity, point: layer.convertPoint(touches.first!.locationInView(self), fromLayer: layer), width: width, height: height, pulseLayers: &pulseLayers, pulseAnimation: pulseAnimation)
	}
	
	/**
	A delegation method that is executed when the view touch event has
	ended.
	- Parameter touches: A set of UITouch objects.
	- Parameter event: A UIEvent object.
	*/
	public override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
		super.touchesEnded(touches, withEvent: event)
		MaterialAnimation.pulseContractAnimation(layer, visualLayer: visualLayer, pulseColor: pulseColor, pulseLayers: &pulseLayers, pulseAnimation: pulseAnimation)
	}
	
	/**
	A delegation method that is executed when the view touch event has
	been cancelled.
	- Parameter touches: A set of UITouch objects.
	- Parameter event: A UIEvent object.
	*/
	public override func touchesCancelled(touches: Set<UITouch>?, withEvent event: UIEvent?) {
		super.touchesCancelled(touches, withEvent: event)
		MaterialAnimation.pulseContractAnimation(layer, visualLayer: visualLayer, pulseColor: pulseColor, pulseLayers: &pulseLayers, pulseAnimation: pulseAnimation)
	}
}
