// MIT License

//

// Copyright (c) 2017-2026 MessageKit

//

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to deal

// in the Software without restriction, including without limitation the rights

// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

// copies of the Software, and to permit persons to whom the Software is

// furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included in all

// copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

// SOFTWARE.

import UIKit

open class PlayButtonView: UIView {

// MARK: Lifecycle

// MARK: - Initializers

public override init(frame: CGRect) {

super.init(frame: frame)

setupSubviews()

setupConstraints()

setupView()

}

required public init?(coder aDecoder: NSCoder) {

super.init(coder: aDecoder)

setupSubviews()

setupConstraints()

setupView()

}

// MARK: Open

// MARK: - Methods

open override func layoutSubviews() {

super.layoutSubviews()

guard !cacheFrame.equalTo(frame) else { return }

cacheFrame = frame

updateTriangleConstraints()

applyCornerRadius()

applyTriangleMask()

}

// MARK: Public

public let blurView = UIVisualEffectView(effect: UIBlurEffect(style: .light))

public let triangleView = UIView()

// MARK: Private

private var triangleCenterXConstraint: NSLayoutConstraint?

private var cacheFrame: CGRect = .zero

private func setupSubviews() {

addSubview(blurView)

addSubview(triangleView)

}

private func setupView() {

triangleView.clipsToBounds = true

triangleView.backgroundColor = .black

blurView.clipsToBounds = true

backgroundColor = .clear

}

private func setupConstraints() {

triangleView.translatesAutoresizingMaskIntoConstraints = false

let centerX = triangleView.centerXAnchor.constraint(equalTo: centerXAnchor)

let centerY = triangleView.centerYAnchor.constraint(equalTo: centerYAnchor)

let width = triangleView.widthAnchor.constraint(equalTo: widthAnchor, multiplier: 0.5)

let height = triangleView.heightAnchor.constraint(equalTo: heightAnchor, multiplier: 0.5)

triangleCenterXConstraint = centerX

NSLayoutConstraint.activate([centerX, centerY, width, height])

blurView.translatesAutoresizingMaskIntoConstraints = false

NSLayoutConstraint.activate([

blurView.centerXAnchor.constraint(equalTo: centerXAnchor),

blurView.centerYAnchor.constraint(equalTo: centerYAnchor),

blurView.heightAnchor.constraint(equalTo: heightAnchor),

blurView.widthAnchor.constraint(equalTo: widthAnchor),

])

}

private func triangleMask(for frame: CGRect) -> CAShapeLayer {

let shapeLayer = CAShapeLayer()

let trianglePath = UIBezierPath()

let point1 = CGPoint(x: frame.minX, y: frame.minY)

let point2 = CGPoint(x: frame.maxX, y: frame.maxY / 2)

let point3 = CGPoint(x: frame.minX, y: frame.maxY)

trianglePath.move(to: point1)

trianglePath.addLine(to: point2)

trianglePath.addLine(to: point3)

trianglePath.close()

shapeLayer.path = trianglePath.cgPath

return shapeLayer

}

private func updateTriangleConstraints() {

triangleCenterXConstraint?.constant = triangleView.frame.width / 8

}

private func applyTriangleMask() {

let rect = CGRect(origin: .zero, size: triangleView.bounds.size)

triangleView.layer.mask = triangleMask(for: rect)

}

private func applyCornerRadius() {

blurView.layer.cornerRadius = frame.width / 2

}

}