import SwiftUI

// MARK: - Chart height scaling
//
// Charts declare a base height for compact width. Containers with a wider
// canvas (regular width: iPad, iPhone Duo inner screen, Mac windows) raise the
// scale so plots gain vertical room instead of just stretching horizontally.

extension EnvironmentValues {
    @Entry var chartHeightScale: CGFloat = 1
}

private struct ChartFrameModifier: ViewModifier {
    @Environment(\.chartHeightScale) private var scale
    let base: CGFloat

    func body(content: Content) -> some View {
        content.frame(height: base * scale)
    }
}

extension View {
    /// Fixed chart height that follows `chartHeightScale` from the environment.
    func chartFrame(height: CGFloat) -> some View {
        modifier(ChartFrameModifier(base: height))
    }

    /// Floating label background: Liquid Glass on iOS 26+, material fallback.
    @ViewBuilder
    func floatingPillBackground() -> some View {
        if #available(iOS 26.0, *) {
            self.glassEffect(.regular, in: .capsule)
        } else {
            self
                .background(.regularMaterial, in: Capsule())
                .shadow(color: .black.opacity(0.12), radius: 6, y: 2)
        }
    }
}