import SwiftUI

#if os(macOS)
import AppKit
#elseif canImport(UIKit)
import UIKit
#endif

public enum IdP {
    public static let tint = Color("IdPTint")
    public static let cardRadius: CGFloat = 22
    public static let controlRadius: CGFloat = 14
    public static let badgeRadius: CGFloat = 8

    static func horizontalPadding(compact: Bool) -> CGFloat {
        compact ? 16 : 24
    }

    static func verticalPadding(compact: Bool) -> CGFloat {
        compact ? 16 : 24
    }
}

extension Color {
    static var idpGroupedBackground: Color {
        #if os(macOS)
        Color(nsColor: .windowBackgroundColor)
        #elseif os(watchOS)
        .black
        #else
        Color(uiColor: .systemGroupedBackground)
        #endif
    }

    static var idpSecondaryGroupedBackground: Color {
        #if os(macOS)
        Color(nsColor: .controlBackgroundColor)
        #elseif os(watchOS)
        Color.white.opacity(0.08)
        #else
        Color(uiColor: .secondarySystemGroupedBackground)
        #endif
    }

    static var idpTertiaryFill: Color {
        #if os(macOS)
        Color(nsColor: .quaternaryLabelColor).opacity(0.08)
        #elseif os(watchOS)
        Color.white.opacity(0.12)
        #else
        Color(uiColor: .tertiarySystemFill)
        #endif
    }

    static var idpSeparator: Color {
        #if os(macOS)
        Color(nsColor: .separatorColor)
        #elseif os(watchOS)
        Color.white.opacity(0.14)
        #else
        Color(uiColor: .separator)
        #endif
    }
}

extension View {
    func idpScreenPadding(compact: Bool) -> some View {
        padding(.horizontal, IdP.horizontalPadding(compact: compact))
            .padding(.vertical, IdP.verticalPadding(compact: compact))
    }

    @ViewBuilder
    func idpInlineNavigationTitle() -> some View {
        #if os(macOS)
        self
        #else
        navigationBarTitleDisplayMode(.inline)
        #endif
    }

    @ViewBuilder
    func idpTabBarChrome() -> some View {
        #if os(macOS)
        self
        #else
        toolbarBackground(.visible, for: .tabBar)
            .toolbarBackground(.regularMaterial, for: .tabBar)
        #endif
    }

    @ViewBuilder
    func idpSearchable(text: Binding<String>, isPresented: Binding<Bool>) -> some View {
        #if os(macOS)
        searchable(text: text, isPresented: isPresented)
        #else
        searchable(text: text, isPresented: isPresented, placement: .navigationBarDrawer(displayMode: .always))
        #endif
    }
}

extension ToolbarItemPlacement {
    static var idpTrailingToolbar: ToolbarItemPlacement {
        #if os(macOS)
        .primaryAction
        #else
        .topBarTrailing
        #endif
    }
}