using System;
using UnityEngine.InputSystem;
using UnityEngine;
#if UNITY_EDITOR
using UnityEngine.InputSystem.Editor;
#endif
using UnityEngine.InputSystem.Utilities;

namespace UnityEngine.InputSystem
{
    // ISX-1860 - #ifdef out Domain Reload specific functionality from CoreCLR
#if UNITY_EDITOR
    /// <summary>
    /// A hidden, internal object we put in the editor to bundle input system state
    /// and help us survive domain reloads.
    /// </summary>
    /// <remarks>
    /// Player doesn't need this stuff because there's no domain reloads to survive, and
    /// also doesn't have domain reloads.
    /// </remarks>
    internal class InputSystemStateManager : ScriptableObject, ISerializationCallbackReceiver
    {
        /// <summary>
        /// References the "core" input state that must survive domain reloads.
        /// </summary>
        [SerializeField] public InputSystemState systemState;

        /// <summary>
        /// Triggers Editor restart when enabling NewInput back-ends.
        /// </summary>
        [SerializeField] public bool newInputBackendsCheckedAsEnabled;

        /// <summary>
        /// Saves and restores InputSettings across domain reloads
        /// </summary>
        /// <remarks>
        /// InputSettings are serialized to JSON which this string holds.
        /// </remarks>
        [SerializeField] public string settings;

        /// <summary>
        /// Timestamp retrieved from InputRuntime.currentTime when exiting EditMode.
        /// </summary>
        /// <remarks>
        /// All input events occurring between exiting EditMode and entering PlayMode are discarded.
        /// </remarks>
        [SerializeField] public double exitEditModeTime;

        /// <summary>
        /// Timestamp retrieved from InputRuntime.currentTime when entering PlayMode.
        /// </summary>
        /// <remarks>
        /// All input events occurring between exiting EditMode and entering PlayMode are discarded.
        /// </remarks>
        [SerializeField] public double enterPlayModeTime;

        public void OnBeforeSerialize()
        {
            // Save current system state.
            if (InputSystem.s_Manager != null)
            {
                systemState.manager = InputSystem.s_Manager;
                systemState.managerState = InputSystem.s_Manager.SaveState();
            }

            if (InputSystem.s_Remote != null)
            {
                systemState.remote = InputSystem.s_Remote;
                systemState.remotingState = InputSystem.s_Remote.SaveState();
            }

            systemState.remoteConnection = InputSystem.remoteConnection;
            systemState.userSettings = InputEditorUserSettings.s_Settings;
        }

        public void OnAfterDeserialize()
        {
        }
    }
#endif // UNITY_EDITOR
}