TodosApp/Todos/View/TagBarView.swift

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

import SwiftUI
import SwiftData

struct TagBarView: View {
  @Binding var tags: [Tag]
  @AppStorage(UserDefaultsKeys.UrlHints) var allHints = CodableArray<URLHint>()

  @State private var active: String = ""
  @FocusState private var isFocused: Bool
  
  var body: some View {
    HStack {
      ForEach($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) {
            tags.removeAll(where: { $0.id.isEmpty })
          }
      }
      .scaledToFit()
      TextField("Tag", text: $active)
        .onSubmit {
          if !active.isEmpty && !tags.contains(where: { $0.like(active) }) {
            tags.append(Tag(id: active))
          }
          active = ""
        }
    }
  }
}

#Preview {
  @Previewable @State var tags = Array<Tag>()
  @Previewable @State var allHints = CodableArray([
    URLHint(prefix: "RPD:", replacement: "http://localhost/")
  ])
  TagBarView(tags: $tags)
}