package com.linghu.controller;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
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.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.linghu.model.common.ResponseResult;
import com.linghu.model.dto.HealthResponse;
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 com.linghu.model.dto.TaskListResponse;

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}")
    public Mono<ResponseResult<TaskResultResponse>> getTaskResult(@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) {
                        return updateQuestionAndReference(result)
                                .thenReturn(responseResult);
                    }
                    return Mono.just(responseResult);
                })
                .onErrorResume(e -> {
                    System.out.println("获取任务结果失败");
                    return Mono.just(ResponseResult.error(e.getMessage()));
                });
    }

    /*
     * 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);
     * 
     * // 查询关键词ID
     * LambdaQueryWrapper<Keyword> keywordQuery = new LambdaQueryWrapper<>();
     * keywordQuery.eq(Keyword::getTask_id, result.getTask_id());
     * Keyword keyword = keywordService.getOne(keywordQuery);
     * 
     * if (keyword == null) {
     * System.out.println("未找到关联的关键词，task_id: " + result.getTask_id());
     * return;
     * }
     * 
     * // 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 查询问题ID
     * LambdaQueryWrapper<Question> queryWrapper = new LambdaQueryWrapper<>();
     * queryWrapper.eq(Question::getQuestion, questionResult.getQuestion())
     * .eq(Question::getKeyword_id, keyword.getKeyword_id());
     * Question question = questionService.getOne(queryWrapper);
     * 
     * if (question != null) {
     * // 更新问题状态
     * LambdaUpdateWrapper<Question> updateWrapper = new LambdaUpdateWrapper<>();
     * updateWrapper.eq(Question::getQuestion_id, question.getQuestion_id())
     * .set(Question::getStatus, questionResult.getStatus())
     * .set(Question::getResponse, questionResult.getResponse())
     * .set(Question::getExtracted_count, questionResult.getExtracted_count())
     * .set(Question::getError, questionResult.getError())
     * .set(Question::getTimestamp, LocalDateTime.parse(
     * questionResult.getTimestamp(),
     * DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSSSS")
     * ));
     * questionService.update(updateWrapper);
     * 
     * // 2.2 保存引用数据
     * List<Reference> references = questionResult.getReferences().stream()
     * .map(ref -> {
     * Reference reference = new Reference();
     * reference.setQuestion_id(question.getQuestion_id());
     * reference.setTitle(ref.getTitle());
     * reference.setUrl(ref.getUrl());
     * reference.setDomain(ref.getDomain());
     * reference.setCreate_time(new Date());
     * return reference;
     * })
     * .collect(Collectors.toList());
     * 
     * if (!references.isEmpty()) {
     * referenceService.saveBatch(references);
     * }
     * } else {
     * System.out.println("未找到匹配的问题，question " + question.getQuestion());
     * 
     * }
     * }
     * }
     * });
     * }
     */

    private Mono<Void> updateQuestionAndReference(TaskResultResponse result) {
        return Mono.fromRunnable(() -> {
            try {
                // 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);

                // 查询关键词ID
                LambdaQueryWrapper<Keyword> keywordQuery = new LambdaQueryWrapper<>();
                keywordQuery.eq(Keyword::getTask_id, result.getTask_id());
                Keyword keyword = keywordService.getOne(keywordQuery);

                if (keyword == null) {
                    // log.error("未找到关联的关键词，task_id: {}", result.getTask_id());
                    System.out.println("未找到关联的关键词，task_id: " + result.getTask_id());
                    return;
                }

                // 2. 批量查询所有问题（假设Question有task_id和keyword_id字段）
                LambdaQueryWrapper<Question> queryWrapper = new LambdaQueryWrapper<>();
                queryWrapper.eq(Question::getKeyword_id, keyword.getKeyword_id());
                List<Question> questions = questionService.list(queryWrapper);

                // 构建问题映射表，用于快速查找
                Map<String, Question> questionMap = questions.stream()
                        .collect(Collectors.toMap(Question::getQuestion, q -> q));

                // 3. 收集所有需要更新的问题和引用
                List<Question> questionsToUpdate = new ArrayList<>();
                List<Reference> allReferences = new ArrayList<>();

                // 遍历结果，只收集数据不执行数据库操作
                for (UserResult userResult : result.getResults()) {
                    for (QuestionResult questionResult : userResult.getQuestions_results()) {
                        try {
                            Question question = questionMap.get(questionResult.getQuestion());
                            if (question != null) {
                                // 更新问题对象
                                question.setStatus(questionResult.getStatus());
                                question.setResponse(questionResult.getResponse());
                                question.setExtracted_count(questionResult.getExtracted_count());
                                question.setError(questionResult.getError());

                                // 解析时间戳
                                if (questionResult.getTimestamp() != null) {
                                    DateTimeFormatter formatter = DateTimeFormatter
                                            .ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSSSS");
                                    question.setTimestamp(
                                            LocalDateTime.parse(questionResult.getTimestamp(), formatter));
                                }

                                questionsToUpdate.add(question);

                                // 收集引用数据
                                List<Reference> references = questionResult.getReferences().stream()
                                        .map(ref -> {
                                            Reference reference = new Reference();
                                            reference.setQuestion_id(question.getQuestion_id());
                                            reference.setTitle(ref.getTitle());
                                            reference.setUrl(ref.getUrl());
                                            reference.setDomain(ref.getDomain());
                                            reference.setCreate_time(LocalDateTime.now());
                                            return reference;
                                        })
                                        .collect(Collectors.toList());

                                allReferences.addAll(references);
                            } else {
                                // log.warn("未找到匹配的问题，question: {}, keyword_id: {}",
                                // questionResult.getQuestion(), keyword.getKeyword_id());
                            }
                        } catch (Exception e) {
                            // log.error("处理问题结果失败，question: {}, error: {}",
                            // questionResult.getQuestion(), e.getMessage(), e);
                        }
                    }
                }

                // 4. 批量更新问题
                if (!questionsToUpdate.isEmpty()) {
                    questionService.updateBatchById(questionsToUpdate);
                    // log.info("成功批量更新 {} 个问题", questionsToUpdate.size());
                }

                // 5. 批量插入引用
                if (!allReferences.isEmpty()) {
                    // 分批处理，每批1000条记录，避免内存溢出
                    int batchSize = 1000;
                    for (int i = 0; i < allReferences.size(); i += batchSize) {
                        List<Reference> batch = allReferences.subList(
                                i, Math.min(i + batchSize, allReferences.size()));
                        referenceService.saveBatch(batch);
                    }
                    // log.info("成功批量插入 {} 条引用数据", allReferences.size());
                }

            } catch (Exception e) {
                // log.error("更新问题和引用数据失败，task_id: {}, error: {}",
                // result.getTask_id(), e.getMessage(), e);
                throw new RuntimeException("更新问题和引用数据失败", e);
            }
        });
    }

    @GetMapping("/tasks/all")
    @ApiOperation(value = "获取所有任务列表")
    public Mono<ResponseResult<TaskListResponse>> getAllTasks() {
        return webClient.get()
                .uri(baseUrl + "/tasks")
                .accept(MediaType.APPLICATION_JSON)
                .retrieve()
                .bodyToMono(new ParameterizedTypeReference<ResponseResult<TaskListResponse>>() {
                })
                .onErrorResume(e -> {
                    return Mono.just(ResponseResult.error("获取任务列表失败: " + e.getMessage()));
                });
    }

    @GetMapping("/health")
    public Mono<HealthResponse> checkThirdPartyHealth() {
        return webClient.get()
                .uri(baseUrl + "/health") // 假设第三方健康检查接口路径为/health
                .retrieve()
                .bodyToMono(HealthResponse.class)
                .onErrorResume(e -> Mono.just(
                        new HealthResponse("unhealthy", null, "", e.getMessage())));
    }
}