using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;
using PhxhSDK;
using Sirenix.OdinInspector;
using UnityEngine;
using Object = UnityEngine.Object;
#if UNITY_EDITOR
using UnityEditor;
#endif

/// <summary>
/// 记录所有场景/prefab后处理的数据
/// </summary>
[CreateAssetMenu(menuName = "Object后处理数据")]
public class PostProcessData : SerializedScriptableObject
{
    [Serializable]
    private class PostProcessPathData
    {
        public string originPath;

        public string postProcessPath;
        
        //public Object asset;

        public string hashCode;
    }

    private const string PATH = "Assets/Scenes/ObjectPostProcessData.asset";

    private static PostProcessData _instance;

    public static PostProcessData Instance
    {
        get
        {
            if (_instance == null)
            {
                // Debug.Log("load Instance");
                #if UNITY_EDITOR
                _instance = UnityEditor.AssetDatabase.LoadAssetAtPath<PostProcessData>(PATH);
                #else
                _instance = AssetManager.Instance.LoadAsset<PostProcessData>(PATH);
                #endif
                // Debug.Log($"load finish isnull:{_instance == null}");
            }

            return _instance;
        }
    }

    [ReadOnly]
    [SerializeField]
    [Searchable]
    private Dictionary<string, PostProcessPathData> _allPostProcessPathData = new();

    #region API

    public string GetPostProcessedPath(string originPath)
    {
        if (!_allPostProcessPathData.TryGetValue(originPath, out var data))
        {
            return originPath;
        }

        return data.postProcessPath;
    }
    
    public bool TryGetPostProcessedPath(string originPath, out string postProcessPath)
    {
        if (!_allPostProcessPathData.TryGetValue(originPath, out var data))
        {
            postProcessPath = originPath;
            return false;
        }

        postProcessPath = data.postProcessPath;
        return true;
    }

#if UNITY_EDITOR
    public void AddPostProcessData(Object asset, string postProcessPath)
    {
        if (!EditorUtility.IsPersistent(asset))
        {
            return;
        }

        EditorUtility.SetDirty(this);
        var originPath = AssetDatabase.GetAssetPath(asset);
        if (!_allPostProcessPathData.TryGetValue(originPath, out var data))
        {
            data = new PostProcessPathData();
            _allPostProcessPathData.Add(originPath, data);
        }

        data.originPath = originPath;
        data.postProcessPath = postProcessPath;
        //data.asset = asset;
        data.hashCode = CalculateMD5Hash(originPath);
    }

    public bool ShouldPostProcess(string assetPath)
    {
        if (!_allPostProcessPathData.TryGetValue(assetPath, out var savedData))
            return true;

        var newHashCode = CalculateMD5Hash(assetPath);
        return newHashCode != savedData.hashCode;
    }

    public bool ShouldPostProcess(Object asset)
    {
        var path = AssetDatabase.GetAssetPath(asset);
        return ShouldPostProcess(path);
    }
#endif

    #endregion

#if UNITY_EDITOR
    private string CalculateMD5Hash(string filePath)
    {
        if (!File.Exists(filePath))
        {
            DebugUtil.LogError($"filePath is null!");
            return null;
        }
        using (var md5 = MD5.Create())
        {
            var allText = File.ReadAllText(filePath);
            allText = allText.Replace("\r\n", "\r");
            byte[] hashBytes = md5.ComputeHash(System.Text.Encoding.UTF8.GetBytes(allText));
            return BitConverter.ToString(hashBytes).Replace("-", "").ToLowerInvariant();
        }
    }
#endif

#if UNITY_EDITOR
    [Button("重新计算Hash值(点击后可以防止后处理所有场景)")]
    public void ReCalculateHashCode()
    {
        EditorUtility.SetDirty(this);
        foreach (var kv in _allPostProcessPathData)
        {
            kv.Value.hashCode = CalculateMD5Hash(kv.Value.originPath);
        }

        AssetDatabase.SaveAssets();
    }
    
    [Button("重置Hash值(点击后可以后处理所有场景)")]
    public void ReSetHashCode()
    {
        EditorUtility.SetDirty(this);
        foreach (var kv in _allPostProcessPathData)
        {
            kv.Value.hashCode = "";
        }

        AssetDatabase.SaveAssets();
    }
#endif
}