using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using gehGassi.Dto;
using gehGassiApp.Core.Interfaces;
using gehGassiApp.Core.Mapper;
using gehGassiApp.Core.Resources;
using gehGassiApp.Domain.AppVersions;
using Platform = gehGassiApp.Domain.Common.Platform;

namespace gehGassiApp.Core.Services
{
    /// <summary>
    /// Service der die aktuelle AppVersion am Server ermitteln kann
    /// </summary>
    public class AppVersionService : IAppVersionService
    {
        private readonly ICommunicationService _communicationService;

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="communicationService">Instanz eines ICommunicationService</param>
        public AppVersionService(ICommunicationService communicationService)
        {
            _communicationService = communicationService;
        }


        /// <summary>
        /// Holen der aktuellen Version am Server für die gewählte Plattform
        /// </summary>
        /// <param name="platform">Plattform</param>
        /// <param name="language">Sprache</param>
        /// <param name="accessToken">Aktuelles Accesstoken</param>
        /// <param name="token">CancellationToken</param>
        /// <returns>CommunicationResult</returns>
        public async Task<CommunicationResult<AppVersionCheck>> CheckCurrentAppVersionAsync(Platform platform, string language, string accessToken, CancellationToken token)
        {
            var result = new CommunicationResult<AppVersionCheck>() { Value = null };

            var isConnected = await _communicationService.IsConnected();
            if (isConnected)
            {
                var checkResult = await _communicationService.CheckCurrentAppVersionAsync(platform.ToDto(), language, accessToken, token);
                if (checkResult.Success)
                    return checkResult;
            }
            else
            {
                result.Success = false;
                result.ErrorCode = CommunicationErrors.ServerNoConnection;
                result.ErrorMessage = Errors.Server_NoConnection;
            }

            return result;
        }

        /// <summary>
        /// Holen der aktuellen Version am Server für die gewählte Plattform
        /// </summary>
        /// <param name="platform">Plattform</param>
        /// <param name="language">Sprache</param>
        /// <param name="accessToken">Aktuelles Accesstoken</param>
        /// <param name="token">CancellationToken</param>
        /// <returns>CommunicationResult</returns>
        public async Task<CommunicationResult<AppVersion>> GetCurrentAppVersionAsync(Platform platform, string language, string accessToken, CancellationToken token)
        {
            var result = new CommunicationResult<AppVersion>() { Value = null };

            var isConnected = await _communicationService.IsConnected();
            if (isConnected)
            {
                var checkResult = await _communicationService.GetCurrentAppVersionAsync(platform.ToDto(), language, accessToken, token);
                if (checkResult.Success)
                    return checkResult;
            }
            else
            {
                result.Success = false;
                result.ErrorCode = CommunicationErrors.ServerNoConnection;
                result.ErrorMessage = Errors.Server_NoConnection;
            }

            return result;
        }
    }
}