using System;
using System.Collections;
using System.Reflection;
using UnityEditor;
using UnityEngine;

#if UNITY_2018_1_OR_NEWER
public class RuntimeGizmosPreset : AssetPostprocessor
{
    static void OnPostprocessAllAssets(string[] importedAssets, string[] deletedAssets, string[] movedAssets, string[] movedFromAssetPaths)
    {
        foreach (string s in importedAssets)
        {
            if (s.Contains("RuntimeGizmosPreset.cs"))
            {
                AddLayer("Gizmos");
                AddLayer("Nav");
                return;
            }
        }
    }

    static void AddTag(string tag)
    {
        if (!HasTag(tag))
        {
            SerializedObject tagManager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/TagManager.asset")[0]);
            SerializedProperty it = tagManager.GetIterator();
            while (it.NextVisible(true))
            {
                if (it.name == "tags")
                {
                    for (int i = 0; i < it.arraySize; i++)
                    {
                        SerializedProperty dataPoint = it.GetArrayElementAtIndex(i);
                        if (string.IsNullOrEmpty(dataPoint.stringValue))
                        {
                            dataPoint.stringValue = tag;
                            tagManager.ApplyModifiedProperties();
                            return;
                        }
                    }
                }
            }
        }
    }

    static void AddLayer(string layer)
    {
        if (!HasLayer(layer))
        {
            SerializedObject tagMagager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/Tagmanager.asset"));
            SerializedProperty it = tagMagager.GetIterator();
            while (it.NextVisible(true))
            {
                if (it.name.Equals("layers"))
                {
                    for (int i = 0; i < it.arraySize; i++)
                    {
                        if (i <= 7)
                        {
                            continue;
                        }
                        SerializedProperty sp = it.GetArrayElementAtIndex(i);
                        if (string.IsNullOrEmpty(sp.stringValue))
                        {
                            sp.stringValue = layer;
                            tagMagager.ApplyModifiedProperties();
                            Debug.Log("success");
                            return;
                        }
                    }
                }
            }
        }
    }

    static bool HasTag(string tag)
    {
        for (int i = 0; i < UnityEditorInternal.InternalEditorUtility.tags.Length; i++)
        {
            if (UnityEditorInternal.InternalEditorUtility.tags[i].Contains(tag))
                return true;
        }
        return false;
    }

    static bool HasLayer(string layer)
    {
        SerializedObject tagManager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/Tagmanager.asset"));
        SerializedProperty it = tagManager.GetIterator();
        while (it.NextVisible(true))
        {
            if (it.name.Equals("layers"))
            {
                for (int i = 0; i < it.arraySize; i++)
                {
                    if (i <= 7)
                    {
                        continue;
                    }
                    SerializedProperty sp = it.GetArrayElementAtIndex(i);
                    if (!string.IsNullOrEmpty(sp.stringValue))
                    {
                        if (sp.stringValue.Equals(layer))
                        {
                            sp.stringValue = string.Empty;
                            tagManager.ApplyModifiedProperties();
                        }
                    }
                }
            }
        }
        for (int i = 0; i < UnityEditorInternal.InternalEditorUtility.layers.Length; i++)
        {
            if (UnityEditorInternal.InternalEditorUtility.layers[i].Contains(layer))
            {
                return true;
            }
        }
        return false;
    }

}
#endif