using System.Text;
using Azaion.Common.DTO.Config;
using Azaion.Common.Extensions;
using Newtonsoft.Json;

namespace Azaion.Common.Services;

public class FileConfigurationStore : IConfigurationStore
{
    private readonly string _configPath;
    private readonly IFileSystem _fileSystem;
    private static readonly Guid SaveConfigTaskId = Guid.NewGuid();

    public FileConfigurationStore(string configPath, IFileSystem fileSystem)
    {
        _configPath = configPath;
        _fileSystem = fileSystem;
    }

    public async Task<AppConfig> LoadAsync(CancellationToken ct = default)
    {
        if (!_fileSystem.FileExists(_configPath))
            return new AppConfig();
        
        var json = Encoding.UTF8.GetString(await _fileSystem.ReadAllBytesAsync(_configPath, ct));
        return JsonConvert.DeserializeObject<AppConfig>(json) ?? new AppConfig();
    }

    public Task SaveAsync(AppConfig config, CancellationToken ct = default)
    {
        ThrottleExt.Throttle(async () =>
        {
            var publicConfig = new
            {
                config.LoaderClientConfig,
                config.InferenceClientConfig,
                config.GpsDeniedClientConfig,
                config.DirectoriesConfig,
                config.UIConfig,
                config.CameraConfig
            };
            var json = JsonConvert.SerializeObject(publicConfig, Formatting.Indented);
            await _fileSystem.WriteAllBytesAsync(_configPath, Encoding.UTF8.GetBytes(json), ct);
        }, SaveConfigTaskId, TimeSpan.FromSeconds(5));
        
        return Task.CompletedTask;
    }
}