using System.Xml.Serialization;
using TechHelper.Client.AI;
using TechHelper.Services;
using Entities.DTO;
using System.Net.Http.Json;
using Newtonsoft.Json;
using TechHelper.Client.Pages.Exam;


namespace TechHelper.Client.Exam
{
	public class ExamService : IExamService
	{
		private IAIService aIService;
		private IHttpClientFactory httpClientFactory;

		public ExamService(IAIService aIService,
			IHttpClientFactory httpClientFactory)
		{
			this.aIService = aIService;
			this.httpClientFactory = httpClientFactory;
		}

		public ApiResponse ConvertToXML<T>(string xmlContent)
		{
			string cleanedXml = xmlContent.Trim();
			XmlSerializer serializer = new XmlSerializer(typeof(T));

			using (StringReader reader = new StringReader(cleanedXml))
			{
				try
				{
					T deserializedObject = (T)serializer.Deserialize(reader);

					// 成功时返回 ApiResponse
					return new ApiResponse
					{
						Status = true,
						Result = deserializedObject,
						Message = "XML 反序列化成功。"
					};
				}
				catch (InvalidOperationException ex)
				{
					return new ApiResponse
					{
						Status = false,
						Result = null,
						Message = $"XML 反序列化操作错误: {ex.Message}. 内部异常: {ex.InnerException?.Message ?? "无"}"
					};
				}
				catch (Exception ex)
				{
					return new ApiResponse
					{
						Status = false,
						Result = null,
						Message = $"处理 XML 反序列化时发生未知错误: {ex.Message}"
					};
				}
			}
		}

		public async Task<ApiResponse> DividExam(string examContent)
		{
			try
			{
				string respon = await aIService.CallGLM(examContent, AIConfiguration.BreakQuestions);

				if (respon != null)
				{
					return new ApiResponse
					{
						Status = true,
						Result = respon,
						Message = "试题分割成功。"
					};
				}
				else
				{
					return new ApiResponse
					{
						Status = false,
						Result = null,
						Message = "AI 服务未能返回有效内容，或返回内容为空。"
					};
				}
			}
			catch (Exception ex)
			{
				return new ApiResponse
				{
					Status = false,
					Result = null,
					Message = $"处理试题分割时发生内部错误: {ex.Message}"
				};
			}
		}

		public async Task<ApiResponse> FormatExam(string examContent)
		{
			try
			{
				string respon = await aIService.CallGLM(examContent, AIConfiguration.Format);

				if (respon != null)
				{
					return new ApiResponse
					{
						Status = true,
						Result = respon,
						Message = "试题格式化成功。"
					};
				}
				else
				{
					return new ApiResponse
					{
						Status = false,
						Result = null,
						Message = "AI 服务未能返回有效内容，或返回内容为空。"
					};
				}
			}
			catch (Exception ex)
			{
				return new ApiResponse
				{
					Status = false,
					Result = null,
					Message = $"处理试题格式化时发生内部错误: {ex.Message}"
				};
			}
		}

		public async Task<ApiResponse> GetAllExam(string user)
		{
			using (var client = httpClientFactory.CreateClient("Default"))
			{
				var response = await client.GetAsync($"exam/getAllPreview?user={user}");


				if (response.IsSuccessStatusCode)
				{
					var content = await response.Content.ReadAsStringAsync();
					var result = JsonConvert.DeserializeObject<List<ExamDto>>(content);
					return ApiResponse.Success(result: result);
				}
				else
				{
					return ApiResponse.Error(await response.Content.ReadAsStringAsync());
				}
			}
		}

		public async Task<ApiResponse> GetExam(Guid guid)
		{
			return ApiResponse.Success("HELLO");
		}

		public async Task<ApiResponse> ParseSingleQuestionGroup(string examContent)
		{
			try
			{
				string respon = await aIService.CallGLM(examContent, AIConfiguration.ParseSignelQuestion2);

				if (respon != null)
				{
					return new ApiResponse
					{
						Status = true,
						Result = respon,
						Message = "试题解析成功。"
					};
				}
				else
				{
					return new ApiResponse
					{
						Status = false,
						Result = null,
						Message = "AI 服务未能返回有效内容，或返回内容为空。"
					};
				}
			}
			catch (Exception ex)
			{
				return new ApiResponse
				{
					Status = false,
					Result = null,
					Message = $"处理试题解析时发生内部错误: {ex.Message}"
				};
			}
		}

		public async Task<ApiResponse> SaveParsedExam(ExamDto examDto)
		{
			using (var client = httpClientFactory.CreateClient("Default"))
			{
				var respont = await client.PostAsJsonAsync("exam/add",
					examDto);

				if (respont.StatusCode == System.Net.HttpStatusCode.OK)
				{
					return new ApiResponse(true, "ok");
				}
				return new ApiResponse("false");
			}
		}
	}
}