import SwiftUI

struct RootTabs: View {
    @EnvironmentObject private var appModel: NodeAppModel
    @EnvironmentObject private var voiceWake: VoiceWakeManager
    @AppStorage(VoiceWakePreferences.enabledKey) private var voiceWakeEnabled: Bool = false
    @State private var selectedTab: Int = 0
    @State private var voiceWakeToastText: String?
    @State private var toastDismissTask: Task<Void, Never>?

    var body: some View {
        TabView(selection: self.$selectedTab) {
            ScreenTab()
                .tabItem { Label("Screen", systemImage: "rectangle.and.hand.point.up.left") }
                .tag(0)

            VoiceTab()
                .tabItem { Label("Voice", systemImage: "mic") }
                .tag(1)

            SettingsTab()
                .tabItem { Label("Settings", systemImage: "gearshape") }
                .tag(2)
        }
        .overlay(alignment: .topLeading) {
            StatusPill(
                bridge: self.bridgeStatus,
                voiceWakeEnabled: self.voiceWakeEnabled,
                onTap: { self.selectedTab = 2 })
                .padding(.leading, 10)
                .safeAreaPadding(.top, 10)
        }
        .overlay(alignment: .topLeading) {
            if let voiceWakeToastText, !voiceWakeToastText.isEmpty {
                VoiceWakeToast(command: voiceWakeToastText)
                    .padding(.leading, 10)
                    .safeAreaPadding(.top, 58)
                    .transition(.move(edge: .top).combined(with: .opacity))
            }
        }
        .onChange(of: self.voiceWake.lastTriggeredCommand) { _, newValue in
            guard let newValue else { return }
            let trimmed = newValue.trimmingCharacters(in: .whitespacesAndNewlines)
            guard !trimmed.isEmpty else { return }

            self.toastDismissTask?.cancel()
            withAnimation(.spring(response: 0.25, dampingFraction: 0.85)) {
                self.voiceWakeToastText = trimmed
            }

            self.toastDismissTask = Task {
                try? await Task.sleep(nanoseconds: 2_300_000_000)
                await MainActor.run {
                    withAnimation(.easeOut(duration: 0.25)) {
                        self.voiceWakeToastText = nil
                    }
                }
            }
        }
        .onDisappear {
            self.toastDismissTask?.cancel()
            self.toastDismissTask = nil
        }
    }

    private var bridgeStatus: StatusPill.BridgeState {
        if self.appModel.bridgeServerName != nil { return .connected }

        let text = self.appModel.bridgeStatusText.trimmingCharacters(in: .whitespacesAndNewlines)
        if text.localizedCaseInsensitiveContains("connecting") ||
            text.localizedCaseInsensitiveContains("reconnecting")
        {
            return .connecting
        }

        if text.localizedCaseInsensitiveContains("error") {
            return .error
        }

        return .disconnected
    }
}