RouterOS/RouterOSAssistant/Features/Backup/BackupListView.swift

import SwiftUI
import UniformTypeIdentifiers

struct BackupListView: View {
    @ObservedObject var connectionService: ConnectionService
    @StateObject private var viewModel = BackupViewModel()
    @State private var showFolderPicker = false

    var body: some View {
        NavigationStack {
            Group {
                if viewModel.backups.isEmpty {
                    ContentUnavailableView(
                        "Keine Sicherungen",
                        systemImage: "clock.arrow.circlepath",
                        description: Text("Erstelle eine Sicherung, bevor du Änderungen am Router vornimmst.")
                    )
                } else {
                    List(viewModel.backups) { backup in
                        VStack(alignment: .leading) {
                            Text(backup.host).bold()
                            Text(backup.createdAt.formatted(date: .abbreviated, time: .standard))
                                .font(.caption)
                                .foregroundStyle(.secondary)
                        }
                    }
                }
            }
            .safeAreaInset(edge: .bottom) {
                VStack(alignment: .leading, spacing: 4) {
                    Text("Speicherort")
                        .font(.caption)
                        .foregroundStyle(.secondary)
                    Text(viewModel.backupDirectoryPath)
                        .font(.caption)
                        .lineLimit(1)
                        .truncationMode(.middle)
                        .help(viewModel.backupDirectoryPath)
                    HStack {
                        Button("Ordner wählen…") { showFolderPicker = true }
                            .help("Wähle einen eigenen Ordner für neue Sicherungen, z.B. auf einer externen Festplatte oder in iCloud Drive.")
                        Button("Standard verwenden") { viewModel.resetBackupDirectoryToDefault() }
                            .help("Setzt den Speicherort zurück auf den App-eigenen Standardordner.")
                    }
                }
                .padding(8)
                .frame(maxWidth: .infinity, alignment: .leading)
                .background(.bar)
            }
            .fileImporter(
                isPresented: $showFolderPicker,
                allowedContentTypes: [.folder]
            ) { result in
                if case .success(let url) = result {
                    viewModel.setBackupDirectory(url)
                }
            }
            .navigationTitle("Sicherungen")
            .toolbar {
                ToolbarItem {
                    Button {
                        if let credentials = connectionService.credentials {
                            viewModel.createBackup(for: credentials)
                        }
                    } label: {
                        if viewModel.isCreatingBackup {
                            ProgressView()
                        } else {
                            Label("Jetzt sichern", systemImage: "square.and.arrow.down")
                        }
                    }
                    .disabled(connectionService.credentials == nil || viewModel.isCreatingBackup)
                    .help(connectionService.credentials == nil ? "Zuerst im Tab 'Verbinden' mit dem Router verbinden." : "Sicherung jetzt erstellen")
                }
            }
            .alert(
                "Sicherung fehlgeschlagen",
                isPresented: Binding(
                    get: { viewModel.errorMessage != nil },
                    set: { _ in viewModel.errorMessage = nil }
                ),
                presenting: viewModel.errorMessage
            ) { _ in
                Button("OK") {}
            } message: { message in
                Text(message)
            }
        }
        .onAppear { viewModel.load() }
    }
}

#Preview {
    BackupListView(connectionService: ConnectionService())
}