using Microsoft.Extensions.Localization;

using MongoDB.Entities;

using PrivaPub.ClientModels;
using PrivaPub.ClientModels.User.Avatar;
using PrivaPub.Models;
using PrivaPub.Models.User;
using PrivaPub.Resources;
using PrivaPub.StaticServices;

using System.Security.Cryptography;

namespace PrivaPub.Services.ClientToServer.Private
{
	public interface IPrivateAvatarUsersService
	{
		Task<WebResult> UpdateAvatar(UpdateAvatarForm form);
		Task<WebResult> InsertAvatar(InsertAvatarForm form);
	}

	public class PrivateAvatarUsersService : IPrivateAvatarUsersService
	{
		readonly AppConfigurationService _appConfiguration;
		readonly DbEntities _dbEntities;
		readonly IStringLocalizer<GenericRes> _localizer;
		readonly ILogger<PrivateAvatarUsersService> _logger;

		public PrivateAvatarUsersService(AppConfigurationService appConfiguration,
			DbEntities dbEntities,
			IStringLocalizer<GenericRes> localizer,
			ILogger<PrivateAvatarUsersService> logger)
		{
			_appConfiguration = appConfiguration;
			_dbEntities = dbEntities;
			_localizer = localizer;
			_logger = logger;
		}

		public async Task<WebResult> InsertAvatar(InsertAvatarForm form)
		{
			var result = new WebResult();
			try
			{
				if (await _dbEntities.Avatars.Match(a => a.UserName == form.UserName).ExecuteAnyAsync())
					return result.Invalidate(_localizer["The username '{0}' is already take.", form.UserName]);

				if (!await IsValidRootUser(form.RootId))
					return result.Invalidate(_localizer["You can't do this action because of your account status."]);

				var newAvatar = new Avatar
				{
					Name = form.Name,
					UserName = form.UserName,
					Biography = form.Biography,
					Fields = form.Fields,
					PersonalNote = form.PersonalNote,
				};
				if (!form.Settings.IsDefault)
					newAvatar.Settings = new()
					{
						IsDefault = false,
						DarkThemeIndexColour = form.Settings.DarkThemeIndexColour,
						IconsThemeIndexColour = form.Settings.IconsThemeIndexColour,
						LanguageCode = form.Settings.LanguageCode,
						LightThemeIndexColour = form.Settings.LightThemeIndexColour,
						PreferSystemTheming = form.Settings.PreferSystemTheming,
						ThemeIsDarkGray = form.Settings.ThemeIsDarkGray,
						ThemeIsDarkMode = form.Settings.ThemeIsDarkMode,
						ThemeIsLightGray = form.Settings.ThemeIsLightGray
					};

				if (_appConfiguration.AppConfiguration == default)
					await _appConfiguration.Init();

				newAvatar.Url = _appConfiguration.AppConfiguration.BackendBaseAddress + $"/peasants/{form.UserName}";
				newAvatar.Domain = _appConfiguration.AppConfiguration.BackendBaseAddress;
				newAvatar.InboxURL = _appConfiguration.AppConfiguration.BackendBaseAddress + $"/peasants/{form.UserName}/mouth";
				newAvatar.OutboxURL = _appConfiguration.AppConfiguration.BackendBaseAddress + $"/peasants/{form.UserName}/anus";
				var rsa = RSA.Create();
				newAvatar.PrivateKey = rsa.ExportRSAPrivateKeyPem();
				newAvatar.PublicKey = rsa.ExportRSAPublicKeyPem();

				await newAvatar.SaveAsync();
				result.Data = newAvatar;

				return result;
			}
			catch (Exception ex)
			{
				_logger.LogError(ex, $"{nameof(PrivateAvatarUsersService)}.{nameof(InsertAvatar)}");
				return result.Invalidate(_localizer["Error: {0}", ex.ToString()], exception: ex);
			}
		}

		public async Task<WebResult> UpdateAvatar(UpdateAvatarForm form)
		{
			var result = new WebResult();
			try
			{

			}
			catch (Exception ex)
			{
				_logger.LogError(ex, $"{nameof(PrivateAvatarUsersService)}.{nameof(UpdateAvatar)}");
				return result.Invalidate(_localizer["Error: {0}", ex.ToString()], exception: ex);
			}
		}

		async ValueTask<bool> IsValidRootUser(string rootUserId) =>
			await _dbEntities.RootUsers.MatchID(rootUserId)
			.Match(ru => !ru.DeletedAt.HasValue)
			.ExecuteAnyAsync();
	}
}