TodosApp/Todos/View/TagBarView.swift

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

import SwiftUI
import SwiftData

struct TagBarView: View {
  @Environment(\.modelContext) private var modelContext
  @Binding var task: Task
  @AppStorage(UserDefaultsKeys.UrlHints) var allHints = CodableArray<URLHint>()

  @State private var active: String = ""
  @FocusState private var isFocused: Bool

  var body: some View {
    HStack {
      ForEach($task.tags) { tag in
        let url = allHints.filter({ $0.matches(tag.wrappedValue) })
          .first?.url(tag.wrappedValue)
        if url != nil {
          Link(destination: url!) {
            Label("", systemImage: "link")
          }
          .padding(.leading, -8)
          .padding(.trailing, -10)
        }

        TextField("", text: tag.id)
          .focused($isFocused)
          .onChange(of: isFocused) {
            task.tags.removeAll(where: { $0.id.isEmpty })
          }
      }
      .scaledToFit()
      TextField("Tag", text: $active)
        .onSubmit(addItem)
    }
  }

  private func addItem() {
    if !active.isEmpty && !task.tags.contains(where: { $0.like(active) }) {
      let newTag = Tag(id: active, parent: task)
      modelContext.insert(newTag)
      task.tags.append(newTag)
    }
    active = ""
  }
}

#Preview {
  @Previewable @State var task = Task()
  TagBarView(task: $task)
}