using System.IO;
using System.IO.Compression;
using System.Text;
using Superlazy;
using Superlazy.Loader;
using UnityEngine;

public interface IGameSaver
{
    public void Init();

    void Set(string key, SLEntity value);

    SLEntity Get(string key, SLEntity defaultValue);
}

public class RuntimeSaver : IGameSaver
{
    private SLEntity entity;

    public void Init()
    {
        if (File.Exists(@"./Saves/Save.sav"))
        {
            var yaml = LoadCompressedTextFromFile(@"./Saves/Save.sav");
            entity = YamlLoader.LoadYaml(yaml);
        }
        else
        {
            var text = PlayerPrefs.GetString("Save", "");
            entity = YamlLoader.LoadYaml(text);
        }
    }

    public SLEntity Get(string path, SLEntity defaultValue)
    {
        if (defaultValue == null) return entity.Get(path);
        if (entity.Get(path)) return entity.Get(path);

        return defaultValue;
    }

    public void Set(string path, SLEntity value)
    {
        entity.Set(path, value);
        SaveCompressedTextToFile(YamlLoader.SaveToYaml(entity), @"./Saves/Save.sav");
    }

    private string LoadCompressedTextFromFile(string filePath)
    {
        using var fileStream = File.OpenRead(filePath);
        using var gzipStream = new GZipStream(fileStream, CompressionMode.Decompress);
        using var resultStream = new MemoryStream();
        gzipStream.CopyTo(resultStream);
        var decompressedData = resultStream.ToArray();
        return Encoding.UTF8.GetString(decompressedData);
    }

    private void SaveCompressedTextToFile(string text, string filePath)
    {
        // 압축할 텍스트를 UTF8 바이트 배열로 변환
        var data = Encoding.UTF8.GetBytes(text);

        // 경로가 없으면 디렉토리 생성
        var directory = Path.GetDirectoryName(filePath);
        if (!Directory.Exists(directory))
        {
            Directory.CreateDirectory(directory);
        }

        // 파일 스트림 열고 압축된 데이터를 기록
        using var fileStream = File.Create(filePath);
        using var gzipStream = new GZipStream(fileStream, CompressionMode.Compress);
        gzipStream.Write(data, 0, data.Length);
    }
}

public class RuntimePlayerPrefSaver : IGameSaver
{
    private SLEntity entity;

    public void Init()
    {
        var text = PlayerPrefs.GetString("SaveData", "");
        entity = JsonLoader.LoadJson(text);
    }

    public SLEntity Get(string path, SLEntity defaultValue)
    {
        if (defaultValue == null) return entity.Get(path);
        if (entity.Get(path)) return entity.Get(path);

        return defaultValue;
    }

    public void Set(string path, SLEntity value)
    {
        entity.Set(path, value);
        PlayerPrefs.SetString("SaveData", JsonLoader.SaveToJson(entity, -1, true));
    }
}

public class PlayerPrefOptionSaver : IGameSaver
{
    private SLEntity entity;

    public void Init()
    {
        var text = PlayerPrefs.GetString("Options", "");
        entity = YamlLoader.LoadYaml(text);
    }

    public SLEntity Get(string path, SLEntity defaultValue)
    {
        if (defaultValue == null) return entity.Get(path);
        if (entity.Get(path)) return entity.Get(path);

        return defaultValue;
    }

    public void Set(string path, SLEntity value)
    {
        entity.Set(path, value);
        PlayerPrefs.SetString("Options", YamlLoader.SaveToYaml(entity));
    }
}

public class FileSaver : IGameSaver
{
    private SLEntity entity;
    private readonly string filePath;

    public FileSaver(string path)
    {
        filePath = path;
    }

    public void Init()
    {
        if (File.Exists(filePath))
        {
            using var file = File.OpenText(filePath);
            var yaml = file.ReadToEnd();
            entity = YamlLoader.LoadYaml(yaml);
        }
        else
        {
            entity = SLEntity.Empty;
        }
    }

    public SLEntity Get(string path, SLEntity defaultValue)
    {
        if (defaultValue == null) return entity.Get(path);
        if (entity.Get(path)) return entity.Get(path);

        return defaultValue;
    }

    public void Set(string path, SLEntity value)
    {
        entity.Set(path, value);
        var yaml = YamlLoader.SaveToYaml(entity);
        File.WriteAllText(this.filePath, yaml);
    }
}

// TODO: SLSystem과 통합
public static class SLGameSaver
{
    private static IGameSaver saver = new DefaultSaver();
    private static IGameSaver optionSaver = new DefaultSaver();

    public static void Init(IGameSaver inst, IGameSaver optionInst)
    {
        saver = inst;
        saver.Init();

        optionSaver = optionInst;
        optionSaver.Init();
    }

    public static void Set(string key, SLEntity value) => saver.Set(key, value);

    public static SLEntity Get(string key, SLEntity deafaultValue = null) => saver.Get(key, deafaultValue);

    public static void OptionSet(string key, SLEntity value) => optionSaver.Set(key, value);

    public static SLEntity OptionGet(string key, SLEntity deafaultValue = null) => optionSaver.Get(key, deafaultValue);
}

public class DefaultSaver : IGameSaver
{
    public void Init()
    {
    }

    public SLEntity Get(string path, SLEntity defaultValue)
    {
        return defaultValue;
    }

    public void Set(string path, SLEntity value)
    {
    }
}