package com.gxwebsoft.ai.controller;

import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.gxwebsoft.ai.dto.AuditContentRequest;
import com.gxwebsoft.ai.entity.AiCloudDoc;
import com.gxwebsoft.ai.entity.AiCloudFile;
import com.gxwebsoft.ai.service.AiHistoryService;
import com.gxwebsoft.ai.utils.ExcelExportTool;
import com.gxwebsoft.common.core.web.ApiResult;
import com.gxwebsoft.common.core.web.BaseController;
import com.gxwebsoft.common.system.entity.User;
import com.gxwebsoft.pwl.entity.PwlProjectLibrary;
import com.gxwebsoft.pwl.service.PwlProjectLibraryService;
import com.gxwebsoft.ai.service.AiCloudDocService;
import com.gxwebsoft.ai.service.AiCloudFileService;
import com.gxwebsoft.ai.service.KnowledgeBaseService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.ResponseBody;
import cn.hutool.core.util.StrUtil;
import cn.hutool.crypto.digest.DigestUtil;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.*;
import java.util.function.Function;
import java.util.stream.Collectors;

/**
 * 审计内容基础控制器
 */
@Slf4j
public abstract class BaseAuditContentController extends BaseController {
    
    @Autowired
    protected AiCloudDocService aiCloudDocService;
    
    @Autowired
    protected AiCloudFileService aiCloudFileService;
    
    @Autowired
    protected KnowledgeBaseService knowledgeBaseService;
    
    @Autowired
    protected PwlProjectLibraryService pwlProjectLibraryService;
    
    @Autowired
    protected AiHistoryService aiHistoryService;
    
    // 历史记录有效期（分钟）
    protected static final int HISTORY_EXPIRE_MINUTES = 10;
    
    /**
     * 通用的表格数据生成方法
     */
    protected ApiResult<?> generateTableData(AuditContentRequest request, String interfaceName, Function<GenerateParams, JSONObject> generateFunction) {
        final User loginUser = getLoginUser();
        String requestHistory = request.getHistory();
        request.setHistory("");
        
        // 检查历史记录
        String requestHash = generateRequestHash(request, interfaceName);
        var history = aiHistoryService.getValidHistory(requestHash, interfaceName, HISTORY_EXPIRE_MINUTES);
        if (history != null) {
            log.info("返回历史数据，请求哈希: {}", requestHash);
            return success(JSONObject.parseObject(history.getResponseData()));
        }
        request.setHistory(requestHistory);
        
        String kbIdTmp = "";
        String libraryKbIds = "";
        
        try {
            // 创建临时知识库（如果需要）
            if (hasUploadedFiles(request)) {
                kbIdTmp = createTempKnowledgeBase(request);
            }
            
            // 查询项目库信息
            libraryKbIds = getLibraryKbIds(request.getLibraryIds());
            
            // 生成数据
            String knowledgeBaseId = getKnowledgeBaseId(kbIdTmp, request.getKbIds());
            GenerateParams params = new GenerateParams(knowledgeBaseId, libraryKbIds, request.getProjectLibrary(), loginUser.getUsername(), request.getHistory(), request.getSuggestion());
            
            JSONObject result = generateFunction.apply(params);
            
            if(result.getBoolean("success")) {
                // 保存到历史记录
                saveToHistory(request, interfaceName, requestHash, result, loginUser);
            }
            
            return success(result);
        } catch (Exception e) {
            log.error("生成表格数据失败，接口: {}", interfaceName, e);
            return fail("生成表格数据失败: " + e.getMessage());
        } finally {
            cleanupTempKnowledgeBase(kbIdTmp);
        }
    }
    
    /**
     * 生成请求哈希
     */
    protected String generateRequestHash(AuditContentRequest request, String interfaceName) {
        String requestJson = JSONObject.toJSONString(request);
        return DigestUtil.md5Hex(interfaceName + ":" + requestJson);
    }
    
    /**
     * 保存到历史记录
     */
    protected void saveToHistory(AuditContentRequest request, String interfaceName, String requestHash, JSONObject result, User loginUser) {
        try {
            aiHistoryService.saveHistory(request.getProjectId(), requestHash, interfaceName, JSONObject.toJSONString(request), result.toJSONString(), loginUser.getUserId(), loginUser.getUsername(), loginUser.getTenantId());
        } catch (Exception e) {
            log.warn("保存历史记录失败", e);
        }
    }
    
    /**
     * 检查是否有上传的文件
     */
    protected boolean hasUploadedFiles(AuditContentRequest request) {
        return !request.getDocList().isEmpty() || !request.getFileList().isEmpty();
    }
    
    /**
     * 获取知识库ID
     */
    protected String getKnowledgeBaseId(String tempKbId, String requestKbIds) {
        return StrUtil.isNotBlank(tempKbId) ? tempKbId : requestKbIds;
    }
    
    /**
     * 获取项目库KB IDs
     */
    protected String getLibraryKbIds(String libraryIds) {
        if (StrUtil.isBlank(libraryIds)) {
            return "";
        }
        List<String> idList = StrUtil.split(libraryIds, ',');
        List<PwlProjectLibrary> ret = pwlProjectLibraryService.list(new LambdaQueryWrapper<PwlProjectLibrary>().in(PwlProjectLibrary::getId, idList));
        return ret.stream().map(PwlProjectLibrary::getKbId).filter(StrUtil::isNotBlank).collect(Collectors.joining(","));
    }
    
    /**
     * 创建临时知识库并提交文档
     */
    protected String createTempKnowledgeBase(AuditContentRequest request) {
        String kbIdTmp = knowledgeBaseService.createKnowledgeBaseTemp();
        // 收集文档ID
        Set<Integer> docIds = request.getDocList().stream().flatMap(docId -> aiCloudDocService.getSelfAndChildren(docId).stream()).map(AiCloudDoc::getId).collect(Collectors.toSet());
        // 查询相关文件
        List<AiCloudFile> fileList = getRelatedFiles(docIds, request.getFileList());
        // 提取文件ID并提交到知识库
        Set<String> kbFileIds = fileList.stream().map(AiCloudFile::getFileId).collect(Collectors.toSet());
        if (!kbFileIds.isEmpty()) {
            knowledgeBaseService.submitDocuments(kbIdTmp, new ArrayList<>(kbFileIds));
        }
        return kbIdTmp;
    }
    
    /**
     * 获取相关文件列表
     */
    protected List<AiCloudFile> getRelatedFiles(Set<Integer> docIds, List<Integer> fileList) {
        LambdaQueryWrapper<AiCloudFile> queryWrapper = new LambdaQueryWrapper<AiCloudFile>()
                .in(!docIds.isEmpty(), AiCloudFile::getDocId, docIds)
                .or(!fileList.isEmpty())
                .in(!fileList.isEmpty(), AiCloudFile::getId, fileList);
        return aiCloudFileService.list(queryWrapper);
    }
    
    /**
     * 清理临时知识库
     */
    protected void cleanupTempKnowledgeBase(String kbId) {
        if (StrUtil.isNotBlank(kbId)) {
            try {
                knowledgeBaseService.deleteIndex(kbId);
            } catch (Exception e) {
                log.warn("删除临时知识库失败: {}", kbId, e);
            }
        }
    }
    
    /**
     * 通用的Excel导出方法
     */
    protected <T> void exportToExcel(Map<String, Object> request, HttpServletResponse response, 
                                  String sheetName, Function<List<Map<String, Object>>, List<T>> converter, 
                                  Class<T> entityClass) {
        List<Map<String, Object>> dataList = (List<Map<String, Object>>) request.get("data");
        String companyName = (String) request.get("companyName");
        
        List<T> exportData = converter.apply(dataList);
        
        String fileName = sheetName + "_" + (companyName != null ? companyName : "未知公司");
        String title = companyName != null ? companyName + " - " + sheetName : sheetName;
        
        ExcelExportTool.exportExcel(exportData, entityClass, fileName, sheetName, title, response);
    }
    
    /**
     * 带审计时间的Excel导出方法
     */
    protected <T> void exportToExcelWithAuditTime(Map<String, Object> request, HttpServletResponse response, 
                                                String sheetName, Function<List<Map<String, Object>>, List<T>> converter, 
                                                Class<T> entityClass) {
        List<Map<String, Object>> dataList = (List<Map<String, Object>>) request.get("data");
        String companyName = (String) request.get("companyName");
        String auditTime = (String) request.get("auditTime");
        
        List<T> exportData = converter.apply(dataList);
        
        String fileName = sheetName + "_" + (companyName != null ? companyName : "未知公司");
        String title = companyName != null ? companyName + " - " + sheetName : sheetName;
        
        if (auditTime != null) {
            title += "（审计时间：" + auditTime + "）";
        }
        
        ExcelExportTool.exportExcel(exportData, entityClass, fileName, sheetName, title, response);
    }
    
    /**
     * 参数包装类
     */
    protected static class GenerateParams {
        public final String knowledgeBaseId;
        public final String libraryKbIds;
        public final String projectLibrary;
        public final String username;
        public final String history;
        public final String suggestion;
        
        public GenerateParams(String knowledgeBaseId, String libraryKbIds, String projectLibrary, String username, String history, String suggestion) {
            this.knowledgeBaseId = knowledgeBaseId;
            this.libraryKbIds = libraryKbIds;
            this.projectLibrary = projectLibrary;
            this.username = username;
            this.history = history;
            this.suggestion = suggestion;
        }
    }
    
    // ========== 通用的工具方法 ==========
    
    /**
     * 获取字符串值
     */
    protected String getStringValue(Map<String, Object> map, String key) {
        Object value = map.get(key);
        return value != null ? value.toString() : "";
    }
    
    /**
     * 格式化底稿索引
     */
    protected String formatWorkPaperIndex(Object workPaperIndex) {
        if (workPaperIndex == null) {
            return "";
        }
        
        if (workPaperIndex instanceof List) {
            List<?> list = (List<?>) workPaperIndex;
            return String.join(", ", list.stream()
                    .map(Object::toString)
                    .collect(Collectors.toList()));
        }
        
        return workPaperIndex.toString();
    }
}