/*
* 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 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

@IBDesignable
public class MaterialTableViewCell : UITableViewCell {
	/**
	A CAShapeLayer used to manage elements that would be affected by
	the clipToBounds property of the backing layer. For example, this
	allows the dropshadow effect on the backing layer, while clipping
	the image to a desired shape within the visualLayer.
	*/
	public private(set) lazy var visualLayer: CAShapeLayer = CAShapeLayer()
	
	/**
	A base delegate reference used when subclassing View.
	*/
	public weak var delegate: MaterialDelegate?
	
	/// 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 = Color.grey.base
	
	/// The type of PulseAnimation.
	public var pulseAnimation: PulseAnimation = .pointWithBacking {
		didSet {
			visualLayer.masksToBounds = .centerRadialBeyondBounds != pulseAnimation
		}
	}
	
	/// A property that accesses the backing layer's backgroundColor.
	@IBInspectable public override var backgroundColor: UIColor? {
		didSet {
			layer.backgroundColor = backgroundColor?.cgColor
		}
	}
	
	/// A property that accesses the layer.frame.origin.x property.
	@IBInspectable public var x: CGFloat {
		get {
			return layer.frame.origin.x
		}
		set(value) {
			layer.frame.origin.x = value
		}
	}
	
	/// A property that accesses the layer.frame.origin.y property.
	@IBInspectable public var y: CGFloat {
		get {
			return layer.frame.origin.y
		}
		set(value) {
			layer.frame.origin.y = value
		}
	}
	
	/**
	A property that accesses the layer.frame.size.width property.
	When setting this property in conjunction with the shape property having a
	value that is not .none, the height will be adjusted to maintain the correct
	shape.
	*/
	@IBInspectable public var width: CGFloat {
		get {
			return layer.frame.size.width
		}
		set(value) {
			layer.frame.size.width = value
		}
	}
	
	/**
	A property that accesses the layer.frame.size.height property.
	When setting this property in conjunction with the shape property having a
	value that is not .none, the width will be adjusted to maintain the correct
	shape.
	*/
	@IBInspectable public var height: CGFloat {
		get {
			return layer.frame.size.height
		}
		set(value) {
			layer.frame.size.height = value
		}
	}
	
	/// Enables automatic shadowPath sizing.
	@IBInspectable public var shadowPathAutoSizeEnabled: Bool = true {
		didSet {
			if shadowPathAutoSizeEnabled {
				layoutShadowPath()
			}
		}
	}
	
	/**
	A property that sets the cornerRadius of the backing layer. If the shape
	property has a value of .circle when the cornerRadius is set, it will
	become .none, as it no longer maintains its circle shape.
	*/
	public var cornerRadiusPreset: RadiusPreset = .none {
		didSet {
			if let v: RadiusPreset = cornerRadiusPreset {
				cornerRadius = RadiusPresetToValue(preset: v)
			}
		}
	}
	
	/// A property that accesses the layer.cornerRadius.
	@IBInspectable public var cornerRadius: CGFloat {
		get {
			return layer.cornerRadius
		}
		set(value) {
			layer.cornerRadius = value
			layoutShadowPath()
		}
	}
	
	/// A preset property to set the borderWidth.
	public var borderWidthPreset: BorderWidthPreset = .none {
		didSet {
			borderWidth = BorderWidthPresetToValue(preset: borderWidthPreset)
		}
	}
	
	/**
	An initializer that initializes the object with a NSCoder object.
	- Parameter aDecoder: A NSCoder instance.
	*/
	public required init?(coder aDecoder: NSCoder) {
		super.init(coder: aDecoder)
		prepareView()
	}
	
	/**
	An initializer that initializes the object.
	- Parameter style: A UITableViewCellStyle enum.
	- Parameter reuseIdentifier: A String identifier.
	*/
	public override init(style: UITableViewCellStyle, reuseIdentifier: String!) {
		super.init(style: style, reuseIdentifier: reuseIdentifier)
		prepareView()
	}
	
	public override func layoutSublayersOfLayer(layer: CALayer) {
		super.layoutSublayersOfLayer(layer)
		if self.layer == layer {
			layoutVisualLayer()
		}
	}
	
	public override func layoutSubviews() {
		super.layoutSubviews()
		layoutShadowPath()
	}
	
	/**
	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: MaterialTableViewCell = 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)
	}
	
	/**
	Prepares the view instance when intialized. When subclassing,
	it is recommended to override the prepareView method
	to initialize property values and other setup operations.
	The super.prepareView method should always be called immediately
	when subclassing.
	*/
	public func prepareView() {
		selectionStyle = .none
		separatorInset = UIEdgeInsetsZero
		contentScaleFactor = Device.scale
		imageView?.isUserInteractionEnabled = false
		textLabel?.isUserInteractionEnabled = false
		detailTextLabel?.isUserInteractionEnabled = false
		prepareVisualLayer()
	}
	
	/// Prepares the visualLayer property.
	internal func prepareVisualLayer() {
		visualLayer.zPosition = 0
		visualLayer.masksToBounds = true
		contentView.layer.addSublayer(visualLayer)
	}
	
	/// Manages the layout for the visualLayer property.
	internal func layoutVisualLayer() {
		visualLayer.frame = bounds
		visualLayer.cornerRadius = cornerRadius
	}
	
	/// Sets the shadow path.
	internal func layoutShadowPath() {
		if shadowPathAutoSizeEnabled {
			if .none == depth {
				shadowPath = nil
			} else if nil == shadowPath {
				shadowPath = UIBezierPath(roundedRect: bounds, cornerRadius: cornerRadius).CGPath
			} else {
				animate(MaterialAnimation.shadowPath(UIBezierPath(roundedRect: bounds, cornerRadius: cornerRadius).CGPath, duration: 0))
			}
		}
	}
}
