StackTransformViewOptions+Layout.swift

//
//  StackTransformViewOptions+Layout.swift
//  CollectionViewPagingLayout
//
//  Created by Amir on 28/03/2021.
//  Copyright © 2021 Amir Khorsandi. All rights reserved.
//

import UIKit
import Foundation

public extension StackTransformViewOptions {
    enum Layout: String, CaseIterable {
        case transparent
        case perspective
        case rotary
        case vortex
        case reverse
        case blur
    }

    static func layout(_ layout: Layout) -> Self {
        switch layout {
        case .transparent:
            return Self(
                scaleFactor: 0.12,
                minScale: 0.0,
                maxStackSize: 4,
                alphaFactor: 0.2,
                bottomStackAlphaSpeedFactor: 10,
                topStackAlphaSpeedFactor: 0.1,
                popAngle: .pi / 10,
                popOffsetRatio: .init(width: -1.45, height: 0.3)
            )
        case .perspective:
            return Self(
                scaleFactor: 0.1,
                minScale: 0.2,
                maxStackSize: 6,
                spacingFactor: 0.08,
                alphaFactor: 0.0,
                perspectiveRatio: 0.3,
                shadowRadius: 5,
                popAngle: .pi / 10,
                popOffsetRatio: .init(width: -1.45, height: 0.3),
                stackPosition: CGPoint(x: 1, y: 0)
            )
        case .rotary:
            return Self(
                scaleFactor: -0.03,
                minScale: 0.2,
                maxStackSize: 3,
                spacingFactor: 0.01,
                alphaFactor: 0.1,
                shadowRadius: 8,
                stackRotateAngel: .pi / 16,
                popAngle: .pi / 4,
                popOffsetRatio: .init(width: -1.45, height: 0.4),
                stackPosition: CGPoint(x: 0, y: 1)
            )
        case .vortex:
            return Self(
                scaleFactor: -0.15,
                minScale: 0.2,
                maxScale: nil,
                maxStackSize: 4,
                spacingFactor: 0,
                alphaFactor: 0.4,
                topStackAlphaSpeedFactor: 1,
                perspectiveRatio: -0.3,
                shadowEnabled: false,
                popAngle: .pi,
                popOffsetRatio: .zero,
                stackPosition: CGPoint(x: 0, y: 1)
            )
        case .reverse:
            return Self(
                scaleFactor: 0.1,
                maxScale: nil,
                maxStackSize: 4,
                spacingFactor: 0.08,
                shadowRadius: 8,
                popAngle: -.pi / 4,
                popOffsetRatio: .init(width: 1.45, height: 0.4),
                stackPosition: CGPoint(x: -1, y: -0.2),
                reverse: true
            )
        case .blur:
            return Self(
                scaleFactor: 0.1,
                maxScale: nil,
                maxStackSize: 7,
                spacingFactor: 0.06,
                topStackAlphaSpeedFactor: 0.1,
                perspectiveRatio: 0.04,
                shadowRadius: 8,
                popAngle: -.pi / 4,
                popOffsetRatio: .init(width: 1.45, height: 0.4),
                stackPosition: CGPoint(x: -1, y: 0),
                reverse: true,
                blurEffectEnabled: true,
                maxBlurEffectRadius: 0.08
            )
        }
    }
}