AIEmoji/AIEmoji/Business/VIewTool/ImagesAnimateScrollView.swift

//
//  ImagesAnimateScrollView.swift
//  ContactPoster
//
//  Created by TSYH on 2024/3/4.
//

import UIKit

class ImagesAnimateScrollView: UIView {
    enum `Direction` {
        case leftToRight
        case rightToLeft
        case topToBottom
        case bottomToTop
    }
    
    lazy var imageView1 = UIImageView()
    lazy var imageView2 = UIImageView()
    
    var animationImageName: String? {
        didSet {
            if let imageName = animationImageName,
               let image = UIImage(named: imageName) {
                imageView1.image = image
                imageView2.image = image
                imageView1.frame.size = image.size
                imageView2.frame.size = image.size
                
                imageView1.contentMode = .scaleAspectFill
                imageView2.contentMode = .scaleAspectFill
            }
        }
    }
    
    lazy var direction: `Direction` = .leftToRight
    lazy var margin: CGFloat = 16.0
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupObser()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupObser()
    }
    
    func setupObser() {
        clipsToBounds = true
        NotificationCenter.default.addObserver(self, selector: #selector(onAppActiveNotify(_:)), name: UIApplication.didBecomeActiveNotification, object: nil)
    }
    
    @objc func onAppActiveNotify(_ notify: Notification) {
        DispatchQueue.main.async {
            self.startAnimation()
        }
    }
    
    func setupSubviews() {
        if imageView1.superview == nil {
            addSubview(imageView1)
            addSubview(imageView2)
            switch direction {
            case .leftToRight:
                imageView1.x = width-imageView1.width
                imageView1.y = 0
                imageView2.y = 0
                imageView2.x = imageView1.x-imageView2.width-margin
            case .rightToLeft:
                imageView1.x = 0
                imageView1.y = 0
                imageView2.y = 0
                imageView2.x = imageView1.width+margin
            case .topToBottom:
                imageView1.x = 0
                imageView1.y = height-imageView1.height
                imageView2.x = 0
                imageView2.y = imageView1.y-imageView2.height-margin
            case .bottomToTop:
                imageView1.x = 0
                imageView1.y = 0
                imageView2.x = 0
                imageView2.y = imageView1.height+margin
            }
        }
    }
    
    func startAnimation() {
        setupSubviews()
        
        for iv in [imageView1, imageView2] {
            iv.layer.removeAllAnimations()
        }
        
        var moveAnim = CABasicAnimation(keyPath: "position.x")
        switch direction {
        case .leftToRight:
            moveAnim.byValue = imageView1.width
        case .rightToLeft:
            moveAnim.byValue = -imageView1.width
        case .topToBottom:
            moveAnim = CABasicAnimation(keyPath: "position.y")
            moveAnim.byValue = imageView1.height
        case .bottomToTop:
            moveAnim = CABasicAnimation(keyPath: "position.y")
            moveAnim.byValue = -imageView1.height
        }
        moveAnim.duration = 36
        moveAnim.repeatCount = .greatestFiniteMagnitude
        imageView1.layer.add(moveAnim, forKey: "move")
        imageView2.layer.add(moveAnim, forKey: "move")
    }
}