package com.linghu.controller;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.ParameterizedTypeReference;
import org.springframework.http.*;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.reactive.function.client.WebClient;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;

import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.linghu.model.common.ResponseResult;
import com.linghu.model.dto.SearchTaskRequest;
import com.linghu.model.entity.Keyword;
import com.linghu.model.entity.Question;
import com.linghu.model.entity.User;
import com.linghu.service.KeywordService;
import com.linghu.service.QuestionService;
import com.linghu.service.ReferenceService;
import com.linghu.utils.JwtUtils;
import com.linghu.model.dto.SearchTaskResponse;
import com.linghu.model.dto.TaskStatusResponse;
import com.linghu.model.dto.TaskCancelResponse;

import io.jsonwebtoken.lang.Collections;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import reactor.core.publisher.Mono;

import org.springframework.web.bind.annotation.*;
import org.springframework.http.HttpStatus;
import com.linghu.model.dto.TaskResultResponse;
import com.linghu.model.dto.TaskResultResponse.QuestionResult;
import com.linghu.model.dto.TaskResultResponse.UserResult;
import com.linghu.model.entity.Reference;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/collect")
@Api(value = "采集接口", tags = "采集管理")
public class CollectController {

    @Autowired
    private ReferenceService referenceService;

    @Value("${linghu.url}")
    private String baseUrl;

    @Autowired
    private WebClient webClient;

    @Autowired
    private JwtUtils jwtUtils;
    @Autowired
    private KeywordService keywordService;
    @Autowired
    private QuestionService questionService;

    @PostMapping("/search")
    @ApiOperation(value = "开始采集")
    public Mono<ResponseResult<SearchTaskResponse>> createSearchTask(
            @RequestBody SearchTaskRequest searchTaskRequest,
            HttpServletRequest request) {
        String token = request.getHeader("Authorization");
        User user = jwtUtils.parseToken(token);
        List<User> users = new ArrayList<>();
        users.add(user);
        searchTaskRequest.setUsers(users);

        return webClient.post()
                .uri(baseUrl + "/search")
                .contentType(MediaType.APPLICATION_JSON)
                .bodyValue(searchTaskRequest)
                .retrieve()
                .bodyToMono(new ParameterizedTypeReference<ResponseResult<SearchTaskResponse>>() {
                })
                .flatMap(responseResult -> {
                    // 提取任务ID
                    SearchTaskResponse taskResponse = responseResult.getData();
                    if (taskResponse != null && taskResponse.getTask_id() != null) {
                        // 保存任务ID到关键词
                        LambdaUpdateWrapper<Keyword> updateWrapper = new LambdaUpdateWrapper<>();
                        updateWrapper.eq(Keyword::getKeyword_id, searchTaskRequest.getKeyword_id());
                        updateWrapper.set(Keyword::getTask_id, taskResponse.getTask_id());
                        keywordService.update(updateWrapper);
                        // 可选：更新响应中的其他信息
                        // taskResponse.setMessage("任务已提交并保存，ID: " + taskResponse.getTaskId());
                    }
                    return Mono.just(responseResult);
                })
                .onErrorResume(e -> {
                    return Mono.just(ResponseResult.error("调用失败: " + e.getMessage()));
                });
    }

    @ApiOperation(value = "查询任务状态")
    @GetMapping("/status")
    public Mono<TaskStatusResponse> getTaskStatus(String taskId) {
        return webClient.get()
                .uri(baseUrl + "/tasks/" + taskId)
                .accept(MediaType.APPLICATION_JSON)
                .retrieve()
                .onStatus(HttpStatus::is4xxClientError, response -> response.bodyToMono(String.class)
                        .flatMap(errorBody -> Mono.error(new RuntimeException("任务不存在: " + errorBody))))
                .bodyToMono(TaskStatusResponse.class)
                .flatMap(result -> {
                    TaskStatusResponse taskStatusResponse = result;
                    if (taskStatusResponse != null && taskStatusResponse.getStatus() != null) {
                        List<Question> updateQuestions = taskStatusResponse.getQuestions_status().stream()
                                .map(qs -> {
                                    Question question = new Question();
                                    question.setQuestion_id(qs.getQuestion_id());
                                    question.setStatus(qs.getStatus());
                                    return question;
                                }).collect(Collectors.toList());

                        questionService.updateBatchById(updateQuestions);
                    }
                    return Mono.just(result);
                });
    }

    @PostMapping("/cancel/{taskId}")
    @ApiOperation(value = "取消任务")
    public Mono<ResponseResult<TaskCancelResponse>> cancelTask(@PathVariable String taskId) {
        return webClient.post()
                .uri(baseUrl + "/tasks/" + taskId + "/cancel")
                .contentType(MediaType.APPLICATION_JSON)
                .bodyValue(Collections.emptyMap()) // 添加空请求体
                .retrieve()
                .onStatus(HttpStatus::isError, response -> {
                    if (response.statusCode() == HttpStatus.NOT_FOUND) {
                        return response.bodyToMono(String.class)
                                .flatMap(errorBody -> Mono.error(new RuntimeException("任务不存在")));
                    } else if (response.statusCode() == HttpStatus.BAD_REQUEST) {
                        return response.bodyToMono(String.class)
                                .flatMap(errorBody -> Mono.error(new RuntimeException("任务已经完成，无法取消")));
                    }
                    return response.createException().flatMap(Mono::error);
                })
                .bodyToMono(TaskCancelResponse.class)
                .map(data -> ResponseResult.success(data))
                .onErrorResume(e -> {
                    if (e.getMessage().contains("任务不存在")) {
                        return Mono.just(ResponseResult.error(404, "任务不存在"));
                    } else if (e.getMessage().contains("无法取消")) {
                        return Mono.just(ResponseResult.error(400, "任务已完成，无法取消"));
                    }
                    return Mono.just(ResponseResult.error(500, "取消任务失败: " + e.getMessage()));
                });
    }
    // @ApiOperation(value = "获取任务结果")
    // @GetMapping("/tasks/{taskId}/result")
    // public Mono<ResponseResult<TaskResultResponse>> getTaskResult(@PathVariable
    // String taskId) {
    // return webClient.get()
    // .uri(baseUrl + "/tasks/" + taskId + "/result")
    // .retrieve()
    // .onStatus(HttpStatus::isError, response -> response.bodyToMono(String.class)
    // .flatMap(errorBody -> Mono.error(new RuntimeException("获取结果失败: " +
    // errorBody))))
    // .bodyToMono(TaskResultResponse.class)
    // .flatMap(result -> {
    // // 更新keyword状态
    // LambdaUpdateWrapper<Keyword> keywordWrapper = new LambdaUpdateWrapper<>();
    // keywordWrapper.eq(Keyword::getTask_id, taskId)
    // .set(Keyword::getStatus, "completed");
    // keywordService.update(keywordWrapper);

    // // 更新question信息并收集references
    // List<Question> updateQuestions = new ArrayList<>();
    // List<Reference> references = new ArrayList<>();

    // result.getResults().forEach(userResult -> {
    // userResult.getQuestions_results().forEach(qResult -> {
    // Question question = new Question();
    // question.setQuestion_id(qResult.getQuestion_id());
    // question.setResponse(qResult.getResponse());
    // question.setStatus(qResult.getStatus());
    // updateQuestions.add(question);

    // // 转换references
    // references.addAll(qResult.getReferences().stream()
    // .map(ref -> new Reference(
    // qResult.getQuestion_id(),
    // ref.getTitle(),
    // ref.getUrl(),
    // ref.getDomain(),
    // result.getTask_id(),
    // ))
    // .collect(Collectors.toList()));
    // });
    // });

    // // 批量更新和插入
    // if (!updateQuestions.isEmpty()) {
    // questionService.updateBatchById(updateQuestions);
    // }
    // if (!references.isEmpty()) {
    // referenceService.saveBatch(references);
    // }

    // return Mono.just(ResponseResult.success(result));
    // })
    // .onErrorResume(e -> Mono.just(ResponseResult.error(e.getMessage())));
    // }

    // @ApiOperation(value = "获取任务结果")
    // @GetMapping("/tasks/{taskId}/result")
    // public Mono<ResponseResult<TaskResultResponse>>
    // getTaskResultlMono(@PathVariable String taskId) {
    // return webClient.get()
    // .uri(baseUrl + "/tasks/" + taskId + "/result")
    // .accept(MediaType.APPLICATION_JSON)
    // .retrieve()
    // .onStatus(HttpStatus::is4xxClientError, response -> {
    // if (response.statusCode() == HttpStatus.NOT_FOUND) {
    // return response.bodyToMono(String.class)
    // .flatMap(errorBody -> Mono.error(new RuntimeException("任务不存在")));
    // } else if (response.statusCode() == HttpStatus.BAD_REQUEST) {
    // return response.bodyToMono(String.class)
    // .flatMap(errorBody -> Mono.error(new RuntimeException("任务未完成，无法获取结果")));
    // }
    // return response.createException().flatMap(Mono::error);
    // })
    // .bodyToMono(new
    // ParameterizedTypeReference<ResponseResult<TaskResultResponse>>() {})
    // .flatMap(responseResult -> {
    // TaskResultResponse result = responseResult.getData();
    // if (result != null && result.getResults() != null) {
    // // 处理结果并更新数据库
    // return updateQuestionAndReference(result)
    // .thenReturn(responseResult);
    // }
    // return Mono.just(responseResult);
    // })
    // .onErrorResume(e -> {

    // return Mono.just(ResponseResult.error(e.getMessage()));
    // });
    // }

    // 更新问题和引用数据
    // private Mono<Void> updateQuestionAndReference(TaskResultResponse result) {
    // return Mono.fromRunnable(() -> {
    // // 1. 更新关键词状态
    // LambdaUpdateWrapper<Keyword> keywordUpdate = new LambdaUpdateWrapper<>();
    // keywordUpdate.eq(Keyword::getTask_id, result.getTask_id())
    // .set(Keyword::getStatus, "completed");
    // keywordService.update(keywordUpdate);

    // // 2. 处理每个用户的问题结果
    // for (UserResult userResult : result.getResults()) {
    // for (QuestionResult questionResult : userResult.getQuestions_results()) {
    // // 2.1 更新问题状态
    // LambdaUpdateWrapper<Question> questionUpdate = new LambdaUpdateWrapper<>();
    // questionUpdate.eq(Question::getTa, result.getTask_id())
    // .eq(Question::getContent, questionResult.getQuestion())
    // .set(Question::getStatus, questionResult.getStatus())
    // .set(Question::getResponse, questionResult.getResponse())
    // .set(Question::getProcessTime,
    // LocalDateTime.parse(questionResult.getTimestamp()));
    // questionService.update(questionUpdate);

    // // 2.2 保存引用数据
    // List<Reference> references = questionResult.getReferences().stream()
    // .map(ref -> {
    // Reference reference = new Reference();
    // reference.setQuestionId(questionService.getOne(questionUpdate).getId());
    // reference.setTitle(ref.getTitle());
    // reference.setUrl(ref.getUrl());
    // reference.setDomain(ref.getDomain());
    // reference.setCreateTime(LocalDateTime.now());
    // return reference;
    // })
    // .collect(Collectors.toList());

    // if (!references.isEmpty()) {
    // referenceService.saveBatch(references);
    // }
    // }
    // }
    // });
    // }

}