namespace OpenQuery;

public class AppConfig
{
    public string ApiKey { get; set; } = "";
    public string Model { get; set; } = "qwen/qwen3.5-flash-02-23";
    public int DefaultQueries { get; set; } = 3;
    public int DefaultChunks { get; set; } = 3;
    public int DefaultResults { get; set; } = 5;
}

public static class ConfigManager
{
    private static string GetConfigPath()
    {
        var home = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
        var configDir = Path.Combine(home, ".config", "openquery");
        if (!Directory.Exists(configDir))
        {
            Directory.CreateDirectory(configDir);
        }
        return Path.Combine(configDir, "config");
    }

    public static AppConfig Load()
    {
        var config = new AppConfig();
        var path = GetConfigPath();
        if (File.Exists(path))
        {
            var lines = File.ReadAllLines(path);
            foreach (var line in lines)
            {
                var parts = line.Split('=', 2);
                if (parts.Length == 2)
                {
                    var key = parts[0].Trim();
                    var val = parts[1].Trim();
                    if (key == "ApiKey") config.ApiKey = val;
                    if (key == "Model") config.Model = val;
                    if (key == "DefaultQueries" && int.TryParse(val, out var q)) config.DefaultQueries = q;
                    if (key == "DefaultChunks" && int.TryParse(val, out var c)) config.DefaultChunks = c;
                    if (key == "DefaultResults" && int.TryParse(val, out var r)) config.DefaultResults = r;
                }
            }
        }
        return config;
    }

    public static void Save(AppConfig config)
    {
        var path = GetConfigPath();
        var lines = new List<string>
        {
            $"ApiKey={config.ApiKey}",
            $"Model={config.Model}",
            $"DefaultQueries={config.DefaultQueries}",
            $"DefaultChunks={config.DefaultChunks}",
            $"DefaultResults={config.DefaultResults}"
        };
        File.WriteAllLines(path, lines);
    }
}