//

//  TranformFadeView.swift

//  Swift-Animations

//

//  Created by YouXianMing on 16/8/20.

//  Copyright © 2016年 YouXianMing. All rights reserved.

//

import UIKit

enum TranformFadeViewAnimatedType : Int {

    case Fade, Show

}

// MARK: TranformFadeView

class TranformFadeView: UIView {

    // MARK: Convenience init.

    convenience init(frame: CGRect, verticalCount : Int, horizontalCount : Int, fadeDuradtion : NSTimeInterval, animationGapDuration : NSTimeInterval) {

        self.init(frame: frame)

        self.verticalCount        = verticalCount

        self.horizontalCount      = horizontalCount

        self.fadeDuradtion        = fadeDuradtion

        self.animationGapDuration = animationGapDuration

        self.makeConfigEffective()

    }

    // MARK: Properies & funcs.

    /// The content imageView's image.

    var image : UIImage? {

        get { return imageView.image}

        set(newVal) { imageView.image = newVal}

    }

    /// The content imageView's contentMode.

    var imageContentMode: UIViewContentMode {

        get { return imageView.contentMode}

        set(newVal) { imageView.contentMode = newVal}

    }

    /// Vertical direction view's count.

    var verticalCount        : Int!

    /// Horizontal direction view's count.

    var horizontalCount      : Int!

    /// One of the maskView's animation duration, default is 1.0

    var fadeDuradtion        : NSTimeInterval! = 

    /// The animation duration two subViews from allMaskView, default is 0.2

    var animationGapDuration : NSTimeInterval! = 0.2

    /**

     Make the config effective.

     */

    func makeConfigEffective() {

        if verticalCount <  || horizontalCount <  {

            return;

        }

        if allMaskView != nil {

            allMaskView.removeFromSuperview()

        }

        countNumArray.removeAll()

        allMaskView = UIView(frame: bounds)

        maskView    = allMaskView

        let height         = bounds.size.height

        let width          = bounds.size.width

        let maskViewHeight = height / CGFloat(verticalCount)

        let maskViewWidth  = width  / CGFloat(horizontalCount)

        var count : Int =

        for horizontal in  ..< horizontalCount {

            for vertical in  ..< verticalCount {

                let frame                = CGRectMake(maskViewWidth * CGFloat(horizontal), maskViewHeight * CGFloat(vertical), maskViewWidth, maskViewHeight)

                let maskView             = UIView(frame: frame)

                maskView.tag             = maskViewTag + count

                maskView.backgroundColor = UIColor.blackColor()

                allMaskView.addSubview(maskView)

                count = count + ;

            }

        }

        maskViewCount = count

        for i in  ..< maskViewCount {

            countNumArray.append(i)

        }

    }

    /**

     Start transform to fade or show state.

     - parameter animated:    Animated or not.

     - parameter transformTo: Show or fade.

     */

    func start(animated animated : Bool, transformTo : TranformFadeViewAnimatedType) {

        if animated == true {

            let tmpFadeDuradtion = fadeDuradtion        <  ? 1.0 : fadeDuradtion

            let tmpGapDuration   = animationGapDuration <  ? 0.2 : animationGapDuration

            for i in  ..< maskViewCount {

                let tmpView = allMaskView.viewWithTag(maskViewTag + i)

                UIView.animateWithDuration(tmpFadeDuradtion, delay: NSTimeInterval(i) * tmpGapDuration, options: .CurveLinear, animations: {

                    switch transformTo {

                    case .Fade :

                        tmpView?.alpha = 0.0

                    case .Show :

                        tmpView?.alpha = 1.0

                    }

                    }, completion: nil)

            }

        } else {

            for i in  ..< maskViewCount {

                let tmpView = allMaskView.viewWithTag(maskViewTag + i)

                    switch transformTo {

                    case .Fade :

                        tmpView?.alpha = 0.0

                    case .Show :

                        tmpView?.alpha = 1.0

                    }

            }

        }

    }

    // MARK: System methods & Private properties

    private var imageView     : UIImageView!

    private var allMaskView   : UIView!

    private var maskViewCount : Int!

    private var countNumArray : [Int]!

    private var maskViewTag   : Int = 

    override init(frame: CGRect) {

        super.init(frame: frame)

        imageView                     = UIImageView(frame: bounds)

        imageView.layer.masksToBounds = true

        countNumArray                 = [Int]()

        self.addSubview(imageView)

    }

    required init?(coder aDecoder: NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

}