using System.Text.Json;
using System.Text.Json.Serialization;

namespace AnchorCli;

internal sealed class AnchorConfig
{
    public string ApiKey { get; set; } = "";
    public string Model { get; set; } = "qwen/qwen3.5-27b";

    // ── Persistence ──────────────────────────────────────────────────────

    private static string ConfigPath =>
        Path.Combine(
            Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
            "anchor", "config.json");

    public static AnchorConfig Load()
    {
        try
        {
            if (File.Exists(ConfigPath))
            {
                var json = File.ReadAllText(ConfigPath);
                return JsonSerializer.Deserialize(json, AppJsonContext.Default.AnchorConfig)
                    ?? new AnchorConfig();
            }
        }
        catch { /* fall through to defaults */ }

        return new AnchorConfig();
    }

    public void Save()
    {
        Directory.CreateDirectory(Path.GetDirectoryName(ConfigPath)!);
        var json = JsonSerializer.Serialize(this, AppJsonContext.Default.AnchorConfig);
        File.WriteAllText(ConfigPath, json);
    }
}