using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;

public class ShapeEditorCache : ScriptableObject
{
    static ShapeEditorCache m_Instance;
    public static ShapeEditorCache instance
    {
        get
        {
            if (!m_Instance)
                m_Instance = FindObjectOfType<ShapeEditorCache>();
            if (!m_Instance)
            {
                m_Instance = ScriptableObject.CreateInstance<ShapeEditorCache>();
                m_Instance.hideFlags = HideFlags.HideAndDontSave;
            }
            return m_Instance;
        }
    }
    public static bool IsValid()
    {
        return m_Instance != null;
    }
    public static void InvalidateCache()
    {
        if (m_Instance)
        {
            Undo.ClearUndo(m_Instance);
            DestroyImmediate(m_Instance);
        }
    }
    public static void RecordUndo()
    {
        RecordUndo(Undo.GetCurrentGroupName());
    }
    public static void RecordUndo(string undoName)
    {
        if (m_Instance)
            Undo.RegisterCompleteObjectUndo(m_Instance, undoName);
    }
    public static ISelection GetSelection()
    {
        if (instance)
            return instance.selection;
        return null;
    }
    public static void ClearSelection()
    {
        if (instance)
            instance.selection.Clear();
    }
    public ISelection selection
    {
        get { return m_Selection; }
    }
    public bool rightTangentChanged
    {
        get { return m_RightTangentChanged; }
        set { m_RightTangentChanged = value; }
    }
    public Vector3 leftTangent
    {
        get { return m_LeftTangent; }
        set { m_LeftTangent = value; }
    }
    public Vector3 rightTangent
    {
        get { return m_RightTangent; }
        set { m_RightTangent = value; }
    }
    [SerializeField]
    SerializableSelection m_Selection = new SerializableSelection();
    [SerializeField]
    bool m_RightTangentChanged;
    [SerializeField]
    Vector3 m_LeftTangent;
    [SerializeField]
    Vector3 m_RightTangent;
}