using System.Text.Json;
using SzLib.DataObjects;

namespace SzLib;

public class SzParser(ISzFileManager szFileManager)
{
    private readonly JsonSerializerOptions _jsonOptions = new() { WriteIndented = true };

    public string SerializeDatasetToJson(SzDataset dataset)
    {
        try
        {
            var jsonString = JsonSerializer.Serialize(dataset, _jsonOptions);
            return jsonString;
        }
        catch (JsonException e)
        {
            throw new Exception("Parse Error: " + e.Message);
        }
    }

    public SzDataset? DeserializeDataset(string jsonString)
    {
        try
        {
            var result = JsonSerializer.Deserialize<SzDataset>(jsonString, _jsonOptions);
            return result;
        }
        catch (Exception e)
        {
            throw new Exception("Could not deserialize JSON to type SzDataset: " + e.Message, e);
        }
    }

    public bool SaveDataset(SzDataset dataset)
    {
        var datasetDir = Path.Combine(szFileManager.DataPath, "datasets", dataset.Id);
        Directory.CreateDirectory(datasetDir);
        try
        {
            var json = SerializeDatasetToJson(dataset);
            File.WriteAllText(Path.Combine(datasetDir, "dataset.json"), json);
            return true;
        }
        catch (Exception e)
        {
            Console.WriteLine("Error saving dataset: " + e.Message);
            return false;
        }
    }

    public SzDataset? LoadDataset(string datasetId)
    {
        var datasetPath = Path.Combine(szFileManager.DataPath, "datasets", datasetId, "dataset.json");
        if (!File.Exists(datasetPath))
        {
            Console.WriteLine("Dataset not found: " + datasetId);
            return null;
        }

        try
        {
            return DeserializeDataset(File.ReadAllText(datasetPath));
        }
        catch (Exception e)
        {
            Console.WriteLine($"Error loading dataset: {e.Message}");
            return null;
        }
    }
}