using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Diagnostics;
using Microsoft.Extensions.Caching.Memory;
using System.Net;

namespace Diligent.WebAPI.Business.Services
{
    public class ScreeningTestService : IScreeningTestService
    {
        private readonly ScreeningTestSettings _settings;
        private readonly ILogger<ScreeningTestService> _logger;
        private readonly IMemoryCache _memoryCache;

        public ScreeningTestService(IOptions<ScreeningTestSettings> settings, ILogger<ScreeningTestService> logger, IMemoryCache memoryCache)
        {
            _settings = settings.Value;
            _logger = logger;
            _memoryCache = memoryCache;
        }
        public async Task<BaseResult<IEnumerable<TestMicroserviceRequest>>> GetScreening()
        {
            string token = await GetToken();
            _logger.LogInformation($"Start calling microservice to get tests request");
            var httpClient = new HttpClient();
            var request = new HttpRequestMessage(HttpMethod.Get, _settings.Url + "tests");
            request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", token);

            _logger.LogInformation("Initilazing http call to microservice");
            HttpResponseMessage httpResponseMessage;
            try
            {
                _logger.LogInformation("Calling microservis to get test");
                httpResponseMessage = httpClient.SendAsync(request).Result;
            }
            catch (Exception ex)
            {
                _logger.LogError($"Error in call: {ex.Message}");
                return new BaseResult<IEnumerable<TestMicroserviceRequest>>
                {
                    IsSuccess = false,
                    DataObject = new List<TestMicroserviceRequest>()
                };
            }

            if (httpResponseMessage.StatusCode == HttpStatusCode.Unauthorized)
            {
                _logger.LogError("Error: Unauthorized");
                return new BaseResult<IEnumerable<TestMicroserviceRequest>>
                {
                    IsSuccess = false,
                    DataObject = new List<TestMicroserviceRequest>()
                };
            }

            if (httpResponseMessage.StatusCode != HttpStatusCode.OK)
            {
                _logger.LogError("Error");
                return new BaseResult<IEnumerable<TestMicroserviceRequest>>
                {
                    IsSuccess = false,
                    DataObject = new List<TestMicroserviceRequest>()
                };
            }

            var response = httpResponseMessage.Content.ReadAsStringAsync().Result;
            var resultData = JsonConvert.DeserializeObject<IEnumerable<TestMicroserviceRequest>>(response);
            _logger.LogInformation($"Call pass and it received: {resultData.Count()} records");
            return new BaseResult<IEnumerable<TestMicroserviceRequest>>
            {
                DataObject = resultData
            };

        }

        private async Task<string> GetToken()
        {
            string token = "";
            if (_memoryCache.TryGetValue("JWT", out string t))
            {
                token = t;
            }
            else
            {
                var result = await LoginToScreening();
                var cacheEntryOptions = new MemoryCacheEntryOptions()
                   .SetSlidingExpiration(TimeSpan.FromSeconds(60))
                   .SetAbsoluteExpiration(TimeSpan.FromSeconds(3600))
                   .SetPriority(CacheItemPriority.Normal)
                   .SetSize(1024);
                _memoryCache.Set("JWT", result.Token, cacheEntryOptions);
                token = result.Token;
            }

            return token;
        }

        public async Task<AuthSuccessResponse> LoginToScreening()
        {
            _logger.LogInformation($"Start calling microservice to login");
            var httpClient = new HttpClient();
            var requestUri = new Uri(string.Format(_settings.Url + "auth"));
            var httpContent = new StringContent(System.Text.Json.JsonSerializer.Serialize(new AuthMicroserviceRequest
            {
                Email = _settings.Email,
                Password = _settings.Password
            }),
                                        Encoding.UTF8,
                                        "application/json");
            var response = await httpClient.PostAsync(requestUri, httpContent);
            var content = await response.Content.ReadAsStringAsync();
            try
            {
                var result = JsonConvert.DeserializeObject<AuthSuccessResponse>(content);
                var expires = result.Expires.Value - DateTime.Now;
                var cacheEntryOptions = new MemoryCacheEntryOptions()
                   .SetSlidingExpiration(TimeSpan.FromSeconds(60))
                   .SetAbsoluteExpiration(expires)
                   .SetPriority(CacheItemPriority.Normal)
                   .SetSize(1024);
                _memoryCache.Set("JWT", result.Token, cacheEntryOptions);
                _logger.LogInformation($"Call pass and it received: {result}");

                return result;
            }
            catch (Exception ex)
            {
                _logger.LogInformation($"Error in call: ");
                return new AuthSuccessResponse { Token = "" };
            }
        }

        public async Task<bool> SendTest(TestMicroserviceInviteRequest test)
        {
            string token = await GetToken();
            _logger.LogInformation($"Start calling microservice to send test request");
            var httpClient = new HttpClient();
            var request = new HttpRequestMessage(HttpMethod.Post, _settings.Url + "tests");
            request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", token);
            var httpContent = new StringContent(System.Text.Json.JsonSerializer.Serialize(test),
                                        Encoding.UTF8,
                                        "application/json");
            request.Content = httpContent;


            _logger.LogInformation("Initilazing http call to microservice");
            HttpResponseMessage httpResponseMessage;
            try
            {
                _logger.LogInformation("Calling microservis to send test");
                httpResponseMessage = httpClient.SendAsync(request).Result;
            }
            catch (Exception ex)
            {
                _logger.LogError($"Error in call: {ex.Message}");
                return false;
            }

            if (httpResponseMessage.StatusCode == HttpStatusCode.Unauthorized)
            {
                _logger.LogError("Error: Unauthorized");
                return false;
            }

            if (httpResponseMessage.StatusCode != HttpStatusCode.OK)
            {
                _logger.LogError("Error");
                return false;
            }

            _logger.LogInformation($"Call pass");
            return true;
        }
    }
}