//
//  ContextGaugeView.swift
//  Poche
//
//  Author:  Simon-Pierre Boucher
//  Contact: contact@spboucher.ai
//

import SwiftUI

/// Discreet context gauge (CLAUDE.md §5): a thin line, never a token count.
struct ContextGaugeView: View {
    let ratio: Double

    var body: some View {
        GeometryReader { proxy in
            ZStack(alignment: .leading) {
                Capsule()
                    .fill(Color.primary.opacity(0.06))
                Capsule()
                    .fill(fillStyle)
                    .frame(width: max(4, proxy.size.width * min(ratio, 1)))
            }
        }
        .frame(height: 3)
        .opacity(ratio < 0.05 ? 0 : 0.85)
        .animation(.easeInOut(duration: 0.3), value: ratio)
        .accessibilityHidden(true)
    }

    private var fillStyle: AnyShapeStyle {
        switch ratio {
        case ..<0.6: AnyShapeStyle(Theme.accentGradient)
        case ..<0.85: AnyShapeStyle(Color.orange)
        default: AnyShapeStyle(Color.red)
        }
    }
}