using ReactorMaintenance.Simulation;
using FileAccess = Godot.FileAccess;

namespace ReactorMaintenance.Godot.Data;

public static class LevelStateLoader
{
    public static LevelState Load(string path)
    {
        if (string.IsNullOrWhiteSpace(path))
            throw new ArgumentException("Level path must not be null or empty.", nameof(path));

        if (!FileAccess.FileExists(path))
            throw new FileNotFoundException($"Level file not found: {path}");

        var json = FileAccess.GetFileAsString(path);
        if (string.IsNullOrWhiteSpace(json))
            throw new InvalidOperationException($"Level file is empty: {path}");

        try
        {
            return LevelSerializer.Deserialize(json);
        }
        catch (InvalidOperationException)
        {
            throw;
        }
        catch (Exception ex)
        {
            throw new InvalidOperationException(
                $"Failed to deserialize level from {path}: {ex.Message}", ex);
        }
    }
}