using System.Diagnostics.CodeAnalysis;

namespace Config;

public sealed class ConfigSource
{
    public required string Path { get; init; }
    public required ConfigFormat Format { get; init; }
    public bool Optional { get; init; } = true;

    public override string ToString()
    {
        return $"{Format}:{Path} (Optional={Optional})";
    }

    public static bool TryGuess(string path, [NotNullWhen(true)] out ConfigSource? source)
    {
        source = null;
        var ext = System.IO.Path.GetExtension(path).ToLowerInvariant();
        var fmt = ext switch
        {
            ".json" => ConfigFormat.Json,
            ".ini" => ConfigFormat.Ini,
            ".xml" => ConfigFormat.Xml,
            ".toml" => ConfigFormat.Toml,
            _ => (ConfigFormat?)null
        };

        if (fmt is null) return false;
        source = new ConfigSource { Path = path, Format = fmt.Value };
        return true;
    }
}