//  🖥️ TUIKit — Terminal UI Kit for Swift
//  MainMenuPage.swift
//
//  Created by LAYERED.work
//  CC BY-NC-SA 4.0

import TUIkit

/// The main menu page.
///
/// Displays a centered menu with all available demos and
/// feature highlight boxes at the bottom.
struct MainMenuPage: View {
    @Binding var currentPage: DemoPage
    @Binding var menuSelection: Int

    var body: some View {
        VStack(spacing: 1) {
            Spacer(minLength: 1)

            HStack {
                Spacer()
                Menu(
                    title: "Select a Demo",
                    items: [
                        MenuItem(label: "Text Styles", shortcut: "1"),
                        MenuItem(label: "Colors", shortcut: "2"),
                        MenuItem(label: "Container Views", shortcut: "3"),
                        MenuItem(label: "Overlays & Modals", shortcut: "4"),
                        MenuItem(label: "Layout System", shortcut: "5"),
                        MenuItem(label: "Buttons & Focus", shortcut: "6"),
                        MenuItem(label: "Spinners", shortcut: "7"),
                        MenuItem(label: "Block Theme Colors", shortcut: "8"),
                    ],
                    selection: $menuSelection,
                    onSelect: { index in
                        // Navigate to the selected page
                        if let page = DemoPage(rawValue: index + 1) {
                            currentPage = page
                        }
                    },
                    selectedColor: .palette.accent,
                    // borderStyle uses appearance default
                    borderColor: .palette.border
                )
                Spacer()
            }

            Spacer(minLength: 1)

            // Feature highlights (centered)
            HStack {
                Spacer()
                HStack(spacing: 3) {
                    featureBox("Pure Swift", "No ncurses")
                    featureBox("Declarative", "SwiftUI-like")
                    featureBox("Composable", "View protocol")
                }
                Spacer()
            }

            Spacer()
        }
        .appHeader {
            VStack {
                HStack {
                    Text("TUIkit Example App").bold().foregroundColor(.palette.accent)
                    Spacer()
                    Text("TUIkit v\(tuiKitVersion)").foregroundColor(.palette.foregroundTertiary)
                }
                Text("A SwiftUI-like framework for Terminal User Interfaces")
                    .foregroundColor(.palette.foregroundSecondary)
                    .italic()
            }
        }
    }

    /// Creates a small feature highlight box.
    ///
    /// The border style is automatically derived from the current appearance.
    private func featureBox(_ title: String, _ subtitle: String) -> some View {
        VStack {
            Text(title)
                .bold()
                .foregroundColor(.palette.accent)
            Text(subtitle)
                .foregroundColor(.palette.foregroundSecondary)
        }
        .padding(EdgeInsets(horizontal: 2, vertical: 1))
        .border(color: .palette.border)  // Uses appearance default borderStyle
    }
}