using System.Text.Json;

namespace NozCli.Core.Config;

public class LocalConfig
{
    public string  ServerUrl { get; set; } = string.Empty;
    public string  Token     { get; set; } = string.Empty;

    // ~/.config/noz/config.json
    private static readonly string ConfigPath = Path.Combine(
        Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
        ".config", "noz", "config.json"
    );

    public static LocalConfig? Load()
    {
        if (!File.Exists(ConfigPath)) return null;
        var json = File.ReadAllText(ConfigPath);
        return JsonSerializer.Deserialize<LocalConfig>(json, JsonOptions);
    }

    public void Save()
    {
        Directory.CreateDirectory(Path.GetDirectoryName(ConfigPath)!);
        // 0600 — only owner can read
        var json = JsonSerializer.Serialize(this, JsonOptions);
        File.WriteAllText(ConfigPath, json);
        if (!OperatingSystem.IsWindows())
            File.SetUnixFileMode(ConfigPath, UnixFileMode.UserRead | UnixFileMode.UserWrite);
    }

    public static bool Exists() => File.Exists(ConfigPath);

    private static readonly JsonSerializerOptions JsonOptions = new()
    {
        WriteIndented        = true,
        PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
    };
}