import SwiftUI
import ServiceManagement

struct DaemonSettingsView: View {
    @Bindable var controller: DaemonController
    @ObservedObject var preferences: AppPreferences
    @State private var pendingPort = ""
    @State private var showRestartAlert = false

    var body: some View {
        TabView {
            serverTab.tabItem { Label("Server", systemImage:"server.rack") }
            buildTab.tabItem  { Label("Build",  systemImage:"hammer") }
            generalTab.tabItem { Label("General", systemImage:"gearshape") }
        }
        .padding(20).frame(width:520)
        .onAppear { pendingPort = String(preferences.port) }
        .alert("Restart Required", isPresented:$showRestartAlert) {
            Button("Restart Now") { Task { await controller.applyPortChange() } }
            Button("Later", role:.cancel) {}
        } message: { Text("Port change takes effect after restart.") }
    }

    private var serverTab: some View {
        Form {
            Section {
                HStack {
                    TextField("Port", text:$pendingPort).textFieldStyle(.roundedBorder).frame(width:80).onSubmit { applyPort() }
                    Text("Default: 8080").foregroundStyle(.secondary).font(.caption)
                    Spacer()
                    Button("Apply") { applyPort() }.disabled(pendingPort == String(preferences.port))
                }
                HStack {
                    Text("Tailscale IP").foregroundStyle(.secondary); Spacer()
                    Text(preferences.tailscaleIP).font(.system(.body,design:.monospaced))
                    Button { NSPasteboard.general.clearContents(); NSPasteboard.general.setString(preferences.tailscaleIP,forType:.string) }
                    label: { Image(systemName:"doc.on.clipboard") }.buttonStyle(.plain).foregroundStyle(.secondary)
                }
                HStack {
                    Text("Status").foregroundStyle(.secondary); Spacer()
                    HStack(spacing:6) {
                        Circle().fill(statusColor).frame(width:8,height:8)
                        Text(controller.serverState.statusLabel)
                    }
                }
                HStack(spacing:8) {
                    Button(controller.serverState.isRunning ? "Stop" : "Start") {
                        Task { if controller.serverState.isRunning { await controller.stop() } else { await controller.start() } }
                    }.tint(controller.serverState.isRunning ? .red : .green)
                    Button("Restart") { Task { await controller.restart() } }.disabled(!controller.serverState.isRunning)
                }.buttonStyle(.bordered)
            } header: { Text("Network & Status") }
        }.formStyle(.grouped)
    }

    private var buildTab: some View {
        Form {
            Section {
                HStack {
                    TextField("XXXXXXXXXX", text:$preferences.developmentTeam)
                        .textFieldStyle(.roundedBorder).font(.system(.body,design:.monospaced)).frame(width:140)
                    Button("Find It") { NSWorkspace.shared.open(URL(string:"https://developer.apple.com/account#MembershipDetailsCard")!) }
                    .buttonStyle(.link).font(.caption)
                }
                if preferences.developmentTeam.isEmpty {
                    Label("Required for code signing.", systemImage:"exclamationmark.triangle.fill").foregroundStyle(.orange).font(.caption)
                } else if preferences.developmentTeam.count == 10 {
                    Label("Team ID looks valid.", systemImage:"checkmark.circle.fill").foregroundStyle(.green).font(.caption)
                }
            } header: { Text("Development Team ID") } footer: { Text("Found at developer.apple.com/account → Membership → Team ID") }
            Section {
                Toggle("Allow Provisioning Updates", isOn:$preferences.allowProvisioningUpdates)
                Picker("Configuration", selection:$preferences.buildConfiguration) {
                    Text("Debug").tag("Debug"); Text("Release").tag("Release")
                }
            } header: { Text("Build Options") }
        }.formStyle(.grouped)
    }

    private var generalTab: some View {
        Form {
            Section {
                Toggle("Launch at Login", isOn:Binding(get:{ preferences.launchAtLogin }, set:{ preferences.launchAtLogin = $0 }))
                Toggle("Show in Dock", isOn:$preferences.showInDock)
            } header: { Text("Startup") } footer: { Text("Launch at Login is managed by macOS System Settings.") }
            Section {
                Button("Open System Login Items") { SMAppService.openSystemSettingsLoginItems() }.buttonStyle(.link)
            } header: { Text("System Settings") }
            Section {
                LabeledContent("Version", value:"1.0.0")
                LabeledContent("Vapor", value:"4.x")
                LabeledContent("Platform", value:"macOS Sequoia")
            } header: { Text("About") }
        }.formStyle(.grouped)
    }

    private var statusColor: Color {
        switch controller.serverState {
        case .running: return .green; case .starting: return .yellow; case .error: return .red; default: return .secondary
        }
    }

    private func applyPort() {
        guard let p = Int(pendingPort), p > 1024, p < 65535, p != preferences.port else { return }
        preferences.port = p
        if controller.serverState.isRunning { showRestartAlert = true }
    }
}