using InnovEnergy.Lib.Utils;
using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;

namespace InnovEnergy.API.DataModel;

public partial record Data
{
    private static readonly JsonSerializerSettings PersistenceJsonSettings = new JsonSerializerSettings
    {
        Formatting        = Formatting.Indented,
        NullValueHandling = NullValueHandling.Include,
        ContractResolver  = new CamelCasePropertyNamesContractResolver(),
        TypeNameHandling  = TypeNameHandling.Auto
    };

    public static readonly JsonSerializerSettings WireFormatJsonSettings = new JsonSerializerSettings
    {
        Formatting        = Formatting.Indented,
        NullValueHandling = NullValueHandling.Ignore,
        ContractResolver  = new CamelCasePropertyNamesContractResolver(),
        TypeNameHandling  = TypeNameHandling.None
    };

    public static Data   Load()     => GetLastVersion().Apply(Load);
    public static String LoadJson() => GetLastVersion().Apply(LoadJson);

    public static Data Load(Int32 sequenceNb)
    {
        var json = LoadJson(sequenceNb);
        return JsonConvert.DeserializeObject<Data>(json, PersistenceJsonSettings)!;
    }

    public static String LoadJson(Int32 sequenceNb)
    {
        var jsonFile = System.IO.Path.Combine(Program.RootDir, sequenceNb + ".json");

        Console.WriteLine($"loaded {jsonFile}");

        return jsonFile.Apply(File.ReadAllText);
    }

    public void Save(String editAction, String user)
    {
        var version = Edit.Version + 1;

        Edit = new Edit(editAction, user, version);

        var path = System.IO.Path.Combine(Program.RootDir, version + ".json");
        var json = SerializeJson();

        File.WriteAllText(path, json);
    }

    public String SerializeJson()
    {
        return JsonConvert.SerializeObject(this, PersistenceJsonSettings);
    }

    private static String Base64Hash(DataElement element)
    {
        return element
            .GetHashCode()
            .Apply(BitConverter.GetBytes)
            .Apply(Convert.ToBase64String)
            .Apply(TrimEq);
    }

    private static String TrimEq(String h) => h.TrimEnd('=');

    private static Int32 GetLastVersion()
    {
        return Directory
            .EnumerateFiles(Program.RootDir, "*.json")
            .Select(System.IO.Path.GetFileNameWithoutExtension)
            .Where(f => f!.All(Char.IsDigit))
            .OrderBy(f => f)
            .Last()
            .Apply(Int32.Parse!);
    }

    //public override String ToString() => JsonConvert.SerializeObject(this, WireFormatJsonSettings);
}