//
//  ActionButton.swift
//  Blackjack
//
//  Reusable styled button for game actions.
//

import SwiftUI
import CasinoKit

struct ActionButton: View {
    let title: String
    let icon: String?
    let style: ButtonStyle
    let action: () -> Void
    
    enum ButtonStyle {
        case primary      // Gold gradient (Deal, New Round)
        case destructive  // Red (Clear)
        case secondary    // Subtle white
        case custom(Color) // Game-specific colors (Hit, Stand, etc.)
        
        var foregroundColor: Color {
            switch self {
            case .primary: return .black
            case .destructive, .secondary, .custom: return .white
            }
        }
    }
    
    init(_ title: String, icon: String? = nil, style: ButtonStyle = .primary, action: @escaping () -> Void) {
        self.title = title
        self.icon = icon
        self.style = style
        self.action = action
    }
    
    var body: some View {
        Button(action: action) {
            HStack(spacing: Design.Spacing.small) {
                if let icon = icon {
                    Image(systemName: icon)
                }
                Text(title)
                    .lineLimit(1)
                    .minimumScaleFactor(CasinoDesign.MinScaleFactor.relaxed)
            }
            .font(.system(size: Design.BaseFontSize.large, weight: .semibold))
            .foregroundStyle(style.foregroundColor)
            .padding(.horizontal, Design.Spacing.large)
            .padding(.vertical, Design.Spacing.medium)
            .background(backgroundView)
        }
        .accessibilityLabel(title)
    }
    
    @ViewBuilder
    private var backgroundView: some View {
        switch style {
        case .primary:
            Capsule()
                .fill(
                    LinearGradient(
                        colors: [Color.Button.goldLight, Color.Button.goldDark],
                        startPoint: .top,
                        endPoint: .bottom
                    )
                )
        case .destructive:
            Capsule()
                .fill(Color.red.opacity(Design.Opacity.heavy))
        case .secondary:
            Capsule()
                .fill(Color.white.opacity(Design.Opacity.hint))
        case .custom(let color):
            Capsule()
                .fill(color)
        }
    }
}

// MARK: - Previews

#Preview("Primary") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        ActionButton("Deal", icon: "play.fill", style: .primary) {}
    }
}

#Preview("Destructive") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        ActionButton("Clear", icon: "xmark.circle", style: .destructive) {}
    }
}

#Preview("Custom Colors") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        HStack(spacing: Design.Spacing.medium) {
            ActionButton("Hit", style: .custom(Color.Button.hit)) {}
            ActionButton("Stand", style: .custom(Color.Button.stand)) {}
            ActionButton("Double", style: .custom(Color.Button.doubleDown)) {}
        }
    }
}