din/compose

import Foundation
import SwiftUI

public struct ComposeNavigationBarStyle {
    
    public var background : AnyView
    public var foregroundColor : Color
    public var tintColor : Color
    
    public var height : CGFloat
    public var horizontalPadding : CGFloat
    
    public var shouldShowDivider : Bool
    
    public var alwaysCenterTitle : Bool
    
    public var isOverlayingContent : Bool
    
    public var normalFont : Font
    public var largeFont : Font

    public var backButtonContent : (@escaping () -> Void) -> AnyView
    
    public init<Background : View, BackButtonContent : ComposeNavigationBackButtonContent>(
        background : Background = Color.clear,
        foregroundColor : Color = .clear,
        tintColor : Color = .blue,
        height : CGFloat = 44,
        horizontalPadding : CGFloat = 24,
        shouldShowDivider : Bool = false,
        alwaysCenterTitle : Bool = false,
        isOverlayingContent : Bool = false,
        normalFont : Font = .system(size: 16, weight: .semibold, design: .default),
        largeFont: Font = .system(size: 18, weight: .regular),
        backButtonContent : BackButtonContent.Type = ComposeNavigationBackButtonDefaultContent.self
    ) {
        self.background = AnyView(background)
        self.foregroundColor = foregroundColor
        self.tintColor = tintColor
        self.height = height
        self.horizontalPadding = horizontalPadding
        self.shouldShowDivider = shouldShowDivider
        self.alwaysCenterTitle = alwaysCenterTitle
        self.isOverlayingContent = isOverlayingContent
        self.normalFont = normalFont
        self.largeFont = largeFont
        self.backButtonContent = { action in AnyView(BackButtonContent.init(action: action)) }
    }

}

private struct ComposeNavigationBarStyleKey : EnvironmentKey {
    
    static let defaultValue: ComposeNavigationBarStyle = ComposeNavigationBarStyle()
    
}

extension EnvironmentValues {
    
    public var composeNavigationBarStyle : ComposeNavigationBarStyle {
        get { self[ComposeNavigationBarStyleKey.self] }
        set { self[ComposeNavigationBarStyleKey.self] = newValue }
    }
    
}

extension View {
    
    public func composeNavigationBarStyle(_ style : ComposeNavigationBarStyle) -> some View {
        self.environment(\.composeNavigationBarStyle, style)
    }
    
}