#nullable enable
using System;
using System.Diagnostics;
using JetBrains.Annotations;
using Robust.Client.GameObjects.Components.UserInterface;
using Robust.Shared.GameObjects.Components.UserInterface;
using Content.Client.GameObjects.Components.Atmos;
using Content.Shared.GameObjects.Components.Atmos;
using Robust.Shared.Localization;

namespace Content.Client.GameObjects.Components.Atmos
{
    /// <summary>
    /// Initializes a <see cref="GasCanisterWindow"/> and updates it when new server messages are received.
    /// </summary>
    [UsedImplicitly]
    public class GasCanisterBoundUserInterface : BoundUserInterface
    {

        private GasCanisterWindow? _window;

        public GasCanisterBoundUserInterface(ClientUserInterfaceComponent owner, object uiKey) : base(owner, uiKey)
        {

        }


        /// <summary>
        /// When a button is pressed, send a network message to the server
        /// </summary>
        /// <param name="button">Which button has been pressed, as an enum item</param>
        private void ButtonPressed(UiButton button)
        {
            SendMessage(new UiButtonPressedMessage(button));
        }


        /// <summary>
        /// When the release pressure is changed
        /// </summary>
        /// <param name="value">The pressure value</param>
        private void ReleasePressureButtonPressed(float value)
        {
            SendMessage(new ReleasePressureButtonPressedMessage(value));
        }


        protected override void Open()
        {
            base.Open();

            _window = new GasCanisterWindow();
            _window.Title = Loc.GetString("Gas Canister");

            _window.OpenCentered();
            _window.OnClose += Close;

            // Bind buttons OnPressed event
            foreach (ReleasePressureButton btn in _window.ReleasePressureButtons)
            {
                btn.OnPressed += _ => ReleasePressureButtonPressed(btn.PressureChange);
            }

            // Bind events
            _window.EditLabelBtn.OnPressed += _ => EditLabel();
            _window.ToggleValve.OnPressed += _ => ToggleValve();
        }


        /// <summary>
        /// Called when the edit label button is pressed
        /// </summary>
        private void EditLabel()
        {
            // Obligatory check because bool isn't nullable
            if (_window == null) return;

            if (_window.LabelInputEditable)
            {
                if (_window.LabelInput.Text != _window.OldLabel)
                    SendMessage(new CanisterLabelChangedMessage(_window.LabelInput.Text));

                _window.LabelInputEditable = false;
            }
            else
            {
                _window.LabelInputEditable = true;
                _window.LabelInput.HasKeyboardFocus();
            }
        }


        private void ToggleValve()
        {
            SendMessage(new UiButtonPressedMessage(UiButton.ValveToggle));
        }


        /// <summary>
        /// Update the UI state based on server-sent info
        /// </summary>
        /// <param name="state"></param>
        protected override void UpdateState(BoundUserInterfaceState state)
        {
            base.UpdateState(state);

            if (!(state is GasCanisterBoundUserInterfaceState cast))
            {
                return;
            }

            _window?.UpdateState(cast);
        }

        protected override void Dispose(bool disposing)
        {
            base.Dispose(disposing);
            if (!disposing) return;
            _window?.Dispose();
        }
    }
}