// generated by bun run generate from the SwiftUI SDK and codegen/catalog.ts.
// edit the generator or catalog, then regenerate.
import SwiftUI
import UIKit

private final class PickerModel: ObservableObject {
  @Published var controlled = OneNativeControlled<String>("")
  @Published var label: String = ""
  @Published var disabled: Bool = false
  @Published var options: [OneNativePickerOption] = []
  @Published var pickerStyle: String = "automatic"
  @Published var accessibility = OneNativeAccessibility()
  @Published var swiftStyle = OneNativeStyle()
  var active = false
  var onSDKEvent: ((String, String) -> Void)?
  func emitSDKEvent(_ name: String, _ value: String) { if active { onSDKEvent?(name, value) } }

  var onChange: ((String, Int, Int) -> Void)?
  func change(_ value: String) {
    guard active, !disabled, controlled.value != value else { return }
    controlled.change(value)
    onChange?(value, controlled.eventCount, controlled.revision)
  }
}
@objcMembers public final class OneNativePickerView: UIView, OneNativeComposable {
  public var onSDKEvent: ((String, String) -> Void)?

  public var onChange: ((String, Int, Int) -> Void)?
  private var model = PickerModel()
  public var onHeight: ((CGFloat) -> Void)?
  private var controller: OneNativeHostingController<OneNativeMeasuredStandalone<PickerContent>>?
  public override init(frame: CGRect) { super.init(frame: frame) }
  required init?(coder: NSCoder) { fatalError("init(coder:) is unavailable") }
  public func configureAccessibility(_ label: String, hint: String, value: String, identifier: String) {
    let next = OneNativeAccessibility(label: label, hint: hint, value: value, identifier: identifier)
    if model.accessibility != next { model.accessibility = next }
  }
  public func configureStyle(_ style: [String: Any]) {
    let next = OneNativeStyle(dictionary: style)
    if model.swiftStyle != next {
      let previousRows = model.swiftStyle.sdkModifiers.filter { $0.first?.hasPrefix("listRow") == true }
      let nextRows = next.sdkModifiers.filter { $0.first?.hasPrefix("listRow") == true }
      model.swiftStyle = next
      if previousRows != nextRows { compositionParent?.refreshRow(for: self) }
    }
  }
  public func configure(_ value: String, acknowledgedEvent: Int, revision: Int, label: String, disabled: Bool, pickerStyle: String) {
    if let next = model.controlled.applying(value, acknowledged: acknowledgedEvent, revision: revision) { model.controlled = next }
    if model.label != label { model.label = label }
    if model.disabled != disabled { model.disabled = disabled }
    if model.pickerStyle != pickerStyle { model.pickerStyle = pickerStyle }
  }
  public func setOptions(_ items: [[String: Any]]) { model.options = items.map { OneNativePickerOption(value: $0["value"] as! String, label: $0["label"] as! String) } }

  private weak var compositionParent: OneNativeCompositionParent?
  public func compositionContent() -> AnyView { AnyView(PickerContent(model: model)) }
  // composed, activation follows the parent: a subtree mounted before root attachment
  // stays silent until the root attaches.
  public func composeInto(_ parent: OneNativeCompositionParent) {
    controller?.detach(); controller = nil
    compositionParent = parent
    bindCallbacks()
    model.active = parent.compositionActive
  }
  public func decompose() { compositionParent = nil; model.active = false }
  public func propagateActive(_ active: Bool) { model.active = active }
  public override func didMoveToWindow() { super.didMoveToWindow(); updateHost() }
  public override func layoutSubviews() { super.layoutSubviews(); updateHost() }
  private func bindCallbacks() {
    model.onSDKEvent = { [weak self] name, value in self?.onSDKEvent?(name, value) }

    model.onChange = { [weak self] value, count, revision in self?.onChange?(value, count, revision) }
  }
  private func updateHost() {
    guard compositionParent == nil else { return }
    model.active = false
    guard window != nil else { controller?.detach(); return }
    if controller == nil {
      bindCallbacks()
      controller = OneNativeHostingController(rootView: OneNativeMeasuredStandalone(content: PickerContent(model: model), onHeight: { [weak self] height in self?.onHeight?(height) }))
    }
    controller?.attach(to: self)
    model.active = controller?.isAttached == true
  }
  public func reset() {
    compositionParent = nil
    model.active = false; model.onSDKEvent = nil; model.onChange = nil
    controller?.detach(); controller = nil; model = PickerModel()
  }
}
private struct PickerContent: View {
  @ObservedObject var model: PickerModel
  var body: some View {
    Picker(selection: Binding(
        get: { model.controlled.value },
        set: { value in model.change(value) }
      )) {
        ForEach(model.options, id: \.value) { option in
          Text(option.label).tag(option.value)
        }
      } label: {
        Text(model.label)
      }
      .oneNativePickerStyle(model.pickerStyle)
      .oneNativeSegmentedFill(model.pickerStyle)
      .disabled(model.disabled)
      .oneNativeAccessibility(model.accessibility)
      .oneNativeStyle(model.swiftStyle, emit: model.emitSDKEvent)
  }
}
private extension View {
  // a segmented picker spans its row the way Settings does instead of hugging its
  // segments, so callers never have to encode the fill themselves.
  @ViewBuilder func oneNativeSegmentedFill(_ style: String) -> some View {
    if style == "segmented" { self.frame(maxWidth: .infinity) }
    else { self }
  }
}