/*
 * Copyright (C) 2015 - 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
 * 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 CosmicMind 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

open class PulseView: View, Pulseable {
    /// A Pulse reference.
    fileprivate var pulse: PulseMotion!
    
    /// PulseAnimation value.
    open var pulseAnimation: PulseAnimation {
        get {
            return pulse.animation
        }
        set(value) {
            pulse.animation = value
        }
    }
    
    /// PulseAnimation color.
    @IBInspectable
    open var pulseColor: UIColor {
        get {
            return pulse.color
        }
        set(value) {
            pulse.color = value
        }
    }
    
    /// Pulse opacity.
    @IBInspectable
    open var pulseOpacity: CGFloat {
        get {
            return pulse.opacity
        }
        set(value) {
            pulse.opacity = value
        }
    }
	
    /**
     Triggers the pulse animation.
     - Parameter point: A Optional point to pulse from, otherwise pulses
     from the center.
     */
    open func pulse(point: CGPoint? = nil) {
        let p = point ?? center
        
        pulse.expand(point: p)
        Motion.delay(time: 0.35) { [weak self] in
            self?.pulse.contract()
        }
    }
    
    /**
     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.
     */
    open override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesBegan(touches, with: event)
        pulse.expand(point: layer.convert(touches.first!.location(in: self), from: layer))
    }
    
    /**
     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.
     */
    open override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesEnded(touches, with: event)
        pulse.contract()
    }
    
    /**
     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.
     */
    open override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesCancelled(touches, with: event)
        pulse.contract()
    }
    
    /**
     Prepares the view instance when intialized. When subclassing,
     it is recommended to override the prepare method
     to initialize property values and other setup operations.
     The super.prepare method should always be called immediately
     when subclassing.
     */
    open override func prepare() {
        super.prepare()
        preparePulse()
    }
}

extension PulseView {
    /// Prepares the pulse motion.
    fileprivate func preparePulse() {
        pulse = PulseMotion(pulseView: self, pulseLayer: visualLayer)
    }
}
