Atoll/DynamicIsland/components/HoverButton.swift

//
//  HoverButton.swift
//  DynamicIsland
//
//  Created by Kraigo on 04.09.2024.
//

import SwiftUI

struct HoverButton: View {
    var icon: String
    var iconColor: Color = .white;
    var scale: Image.Scale = .medium
    var pressEffect: PressEffect? = nil
    var action: () -> Void
    var contentTransition: ContentTransition = .symbolEffect;
    
    @State private var isHovering = false
    @State private var pressOffset: CGFloat = 0

    var body: some View {
        let size = CGFloat(scale == .large ? 40 : 30)
        
        Button(action: {
            triggerPressEffect()
            action()
        }) {
            Rectangle()
                .fill(.clear)
                .contentShape(Rectangle())
                .frame(width: size, height: size)
                .overlay {
                    Capsule()
                        .fill(isHovering ? Color.gray.opacity(0.2) : .clear)
                        .frame(width: size, height: size)
                        .overlay {
                            Image(systemName: icon)
                                .foregroundColor(iconColor)
                                .contentTransition(contentTransition)
                                .font(scale == .large ? .largeTitle : .body)
                        }
                }
        }
        .buttonStyle(PlainButtonStyle())
        .offset(x: pressOffset)
        .onHover { hovering in
            withAnimation(.smooth(duration: 0.3)) {
                isHovering = hovering
            }
        }
    }

    private func triggerPressEffect() {
        guard let pressEffect else { return }

        switch pressEffect {
        case .nudge(let amount):
            withAnimation(.spring(response: 0.2, dampingFraction: 0.55)) {
                pressOffset = amount
            }
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.16) {
                withAnimation(.spring(response: 0.28, dampingFraction: 0.72)) {
                    pressOffset = 0
                }
            }
        }
    }

    enum PressEffect {
        case nudge(CGFloat)
    }
}