//
//  MP_CircularProgressView.swift
//  MusicPlayer
//
//  Created by 忆海16 on 2024/5/14.
//

import Foundation
import UIKit

class CircularProgressView: UIView {
    
    private var progressLayer = CAShapeLayer()
    private var trackLayer = CAShapeLayer()
    private var progress: CGFloat = 0 {
        didSet {
            progressLayer.strokeEnd = progress
        }
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupLayers()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupLayers()
    }
    
    private func setupLayers() {
        // Track layer (background circle)
        let center = CGPoint(x: bounds.width / 2, y: bounds.height / 2)
        let circularPath = UIBezierPath(arcCenter: center, radius: bounds.width / 2, startAngle: -CGFloat.pi / 2, endAngle: 3 * CGFloat.pi / 2, clockwise: true)
        
        trackLayer.path = circularPath.cgPath
        trackLayer.strokeColor = UIColor.lightGray.cgColor
        trackLayer.lineWidth = 3
        trackLayer.fillColor = UIColor.clear.cgColor
        layer.addSublayer(trackLayer)
        
        // Progress layer (foreground circle)
        progressLayer.path = circularPath.cgPath
        progressLayer.strokeColor = UIColor.green.cgColor
        progressLayer.lineWidth = 3
        progressLayer.fillColor = UIColor.clear.cgColor
        progressLayer.lineCap = .round
        progressLayer.strokeEnd = 0
        layer.addSublayer(progressLayer)
    }
    
    func setProgress(to progress: CGFloat) {
        self.progress = progress
    }
}