TodosApp/Todos/View/ProjectPanelView.swift

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

import SwiftUI
import SwiftData

struct ProjectPanelView: View {
  @Environment(\.modelContext) private var modelContext
  @AppStorage(UserDefaultsKeys.Category) var allGroups = CodableArray<Category>()

  @Bindable var item: Project
  @State private var empty = Category()

  var body: some View {
    let style = Date.FormatStyle(date: .numeric, time: .standard)
    HStack {
      Text(item.name)
          .font(.title)
          .padding(.leading, 10)
      Spacer()
      Button(action: addItem) {
        Image(systemName: "plus")
      }
        .help("New Task")
        .padding(.trailing, 10)
    }
    HStack {
      if !item.category.isEmpty {
        let grp = $allGroups.first(where: { $0.name.wrappedValue == item.category })
        ColorPicker("", selection: grp!.color).disabled(true).scaledToFit()
      }
      Picker("", selection: $item.category) {
        Text(empty.name).tag("")
        ForEach(allGroups) { group in
          Text(group.name)
        }
      }.help("Default category for new Tasks")
      Text("Created on \(item.timestamp, format: style)")
    }
    List {
      ForEach($item.tasks) { task in
        TaskView(task: task)
        .contextMenu {
          Button(action: {
            deleteItem(item: task.wrappedValue, fromProject: item)
          }) {
            Label("Delete", systemImage: "trash")
          }
        }
      }
    }
  }
  
  private func addItem() {
    withAnimation {
      let newTask = Task(name: "New Task", parent: item)
      modelContext.insert(newTask)
      item.tasks.append(newTask)
    }
  }

  private func deleteItem(item: Task, fromProject: Project) {
    withAnimation {
      fromProject.tasks.removeAll(where: { $0.id == item.id })
      modelContext.delete(item)
    }
  }
}

#Preview {
  @Previewable @State var item = Project(timestamp: Date())
  ProjectPanelView(item: item)
}