import SwiftUI

public struct AIButtonStyle: ButtonStyle {
    public enum Kind: Hashable {
        case primary
        case secondary
        case danger

        var foregroundColor: Color {
            switch self {
            case .primary, .danger: return .white
            case .secondary: return AITheme.ink
            }
        }

        var backgroundColor: Color {
            switch self {
            case .primary: return AITheme.primary
            case .secondary: return AITheme.surface
            case .danger: return AITheme.danger
            }
        }
    }

    public enum Size: Hashable {
        case compact
        case regular
        case large
    }

    private let kind: Kind
    private let size: Size

    public init(kind: Kind = .secondary, size: Size = .regular) {
        self.kind = kind
        self.size = size
    }

    public func makeBody(configuration: Configuration) -> some View {
        let height: CGFloat = switch size {
        case .compact: AITheme.compactButtonHeight
        case .large: AITheme.largeButtonHeight
        case .regular: AITheme.buttonHeight
        }

        configuration.label
            .font(.system(size: 15, weight: .semibold))
            .foregroundStyle(kind.foregroundColor)
            .frame(minWidth: 44, minHeight: height)
            .padding(.horizontal, 14)
            .background(kind.backgroundColor)
            .clipShape(RoundedRectangle(cornerRadius: AITheme.buttonRadius))
            .overlay {
                RoundedRectangle(cornerRadius: AITheme.buttonRadius)
                    .strokeBorder(kind == .secondary ? AITheme.line : .clear)
            }
            .opacity(configuration.isPressed ? 0.78 : 1)
    }
}