app

import SwiftUI

struct ContentView: View {
    @State private var items: [TodoItem] = []
    @State private var newItemText = ""

    var body: some View {
        NavigationStack {
            List {
                ForEach(items) { item in
                    HStack {
                        Image(systemName: item.isDone ? "checkmark.circle.fill" : "circle")
                            .foregroundColor(item.isDone ? .green : .gray)
                            .onTapGesture { toggleItem(item) }

                        Text(item.title)
                            .strikethrough(item.isDone)
                            .foregroundColor(item.isDone ? .secondary : .primary)
                    }
                }
                .onDelete(perform: deleteItems)
            }
            .navigationTitle("Tasks")
            .toolbar {
                ToolbarItem(placement: .bottomBar) {
                    HStack {
                        TextField("New task...", text: $newItemText)
                            .textFieldStyle(.roundedBorder)
                        Button("Add") { addItem() }
                            .disabled(newItemText.isEmpty)
                    }
                }
            }
        }
    }

    private func addItem() {
        items.append(TodoItem(title: newItemText))
        newItemText = ""
    }

    private func toggleItem(_ item: TodoItem) {
        if let index = items.firstIndex(where: { $0.id == item.id }) {
            items[index].isDone.toggle()
        }
    }

    private func deleteItems(at offsets: IndexSet) {
        items.remove(atOffsets: offsets)
    }
}

struct TodoItem: Identifiable {
    let id = UUID()
    var title: String
    var isDone = false
}