using System.Text.Json;

namespace JevOverlay.Core;

public static class OverlayConfig
{
    public const string FileName = "JevOverlay.conf";

    public static string LoadLogPath(string modDirectory)
    {
        using var document = JsonDocument.Parse(File.ReadAllText(Path.Combine(modDirectory, FileName)));
        var root = document.RootElement;
        if (root.ValueKind != JsonValueKind.Object ||
            !root.TryGetProperty("log_path", out var value) ||
            value.ValueKind != JsonValueKind.String ||
            string.IsNullOrWhiteSpace(value.GetString()) ||
            !Path.IsPathFullyQualified(value.GetString()!))
            throw new FormatException("log_path must be an absolute file path.");
        return Path.GetFullPath(value.GetString()!);
    }
}