import SwiftUI
import AppKit

/// The menu-bar panel: permission statuses, backend health, and a link to
/// Settings. Shown when the user clicks the status-bar item.
struct MenuBarView: View {
    @EnvironmentObject private var settings: AppSettings
    @EnvironmentObject private var permissions: PermissionsManager
    @EnvironmentObject private var health: SparkControlHealth

    var body: some View {
        NavigationStack {
            VStack(alignment: .leading, spacing: 12) {
                header
                Divider()
                permissionsSection
                Divider()
                backendSection
                Divider()
                footer
            }
            .padding(14)
            .frame(width: 320)
        }
        .onAppear { permissions.refresh() }
        .task { await refreshHealth() }
    }

    private var header: some View {
        VStack(alignment: .leading, spacing: 2) {
            Text("Ten31 Transcripts").font(.headline)
            Text("Phase 0 · setup & status")
                .font(.caption)
                .foregroundStyle(.secondary)
        }
    }

    private var permissionsSection: some View {
        VStack(alignment: .leading, spacing: 8) {
            Text("Permissions").font(.subheadline).bold()
            PermissionRow(
                title: "Microphone",
                state: permissions.microphone,
                onGrant: permissions.requestMicrophone,
                onOpenSettings: { permissions.openSettings(.microphone) }
            )
            PermissionRow(
                title: "Screen Recording",
                state: permissions.screenRecording,
                onGrant: permissions.requestScreenRecording,
                onOpenSettings: { permissions.openSettings(.screenRecording) }
            )
            PermissionRow(
                title: "Accessibility",
                state: permissions.accessibility,
                onGrant: permissions.requestAccessibility,
                onOpenSettings: { permissions.openSettings(.accessibility) }
            )
        }
    }

    private var backendSection: some View {
        VStack(alignment: .leading, spacing: 8) {
            HStack {
                Text("Backend").font(.subheadline).bold()
                Spacer()
                Button("Check") { Task { await refreshHealth() } }
                    .disabled(health.status == .checking)
            }
            Text(settings.backendBaseURL)
                .font(.caption)
                .foregroundStyle(.secondary)
                .lineLimit(1)
                .truncationMode(.middle)
            HStack(spacing: 8) {
                StatusDot(color: healthColor)
                Text(healthText).font(.caption)
            }
        }
    }

    private var footer: some View {
        HStack {
            NavigationLink("Settings…") {
                SettingsView()
            }
            Spacer()
            Button("Quit") { NSApplication.shared.terminate(nil) }
        }
    }

    private func refreshHealth() async {
        await health.check(
            baseURL: settings.backendBaseURL,
            skipTLS: settings.skipTLSVerification
        )
    }

    private var healthColor: Color {
        switch health.status {
        case .online:   return .green
        case .offline:  return .red
        case .checking: return .orange
        case .unknown:  return .gray
        }
    }

    private var healthText: String {
        switch health.status {
        case .unknown:            return "Not checked yet"
        case .checking:           return "Checking…"
        case .online(let detail): return "Online · \(detail)"
        case .offline(let error): return "Offline · \(error)"
        }
    }
}