TodosApp/Todos/View/ContentView.swift

//
//  ContentView.swift
//  Todos
//
//  Created by Sam Jaffe on 2/28/26.
//

import SwiftUI
import SwiftData

struct ContentView: View {
  @Environment(\.modelContext) private var modelContext
  @Query private var items: [Category]

  var body: some View {
    NavigationSplitView {
      List {
        ForEach(items) { item in
          NavigationLink {
            CategoryPanelView(item: item)
          } label: {
            CategorySidebarView(name: Bindable(item).name)
          } .contextMenu {
            Button(action: { deleteItem(item: item) }) {
              Label("Delete", systemImage: "trash")
            }
          }
        }
        .onDelete(perform: deleteItems)
      }
      .navigationSplitViewColumnWidth(min: 180, ideal: 200)
      .toolbar {
        ToolbarItem {
          Button(action: addItem) {
            Label("New Category", systemImage: "plus")
          }
        }
      }
    } detail: {
        Text("Select an item")
    }
  }

  private func addItem() {
    withAnimation {
      let newItem = Category(timestamp: Date())
      let count = items.count(where: { $0.name.starts(with: "New Category") })
      if (count > 0) {
        newItem.name += " (\(count))"
      }
      modelContext.insert(newItem)
    }
  }
  
  private func deleteItem(item: Category) {
    withAnimation {
      modelContext.delete(item)
    }
  }

  private func deleteItems(offsets: IndexSet) {
    withAnimation {
      for index in offsets {
        modelContext.delete(items[index])
      }
    }
  }
}

#Preview {
  ContentView()
      .modelContainer(for: Category.self, inMemory: true)
}