package com.gxwebsoft.ai.service.impl;

import com.aliyun.bailian20231229.Client;
import com.aliyun.bailian20231229.models.AddFileResponse;
import com.gxwebsoft.ai.config.KnowledgeBaseConfig;
import com.gxwebsoft.ai.factory.KnowledgeBaseClientFactory;
import com.gxwebsoft.ai.util.AiCloudDataCenterUtil;
import com.gxwebsoft.ai.util.AiCloudKnowledgeBaseUtil;
import com.gxwebsoft.common.system.controller.FileController;
import com.gxwebsoft.common.system.entity.FileRecord;
import com.gxwebsoft.common.system.entity.User;
import lombok.extern.slf4j.Slf4j;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.gxwebsoft.ai.mapper.AiCloudFileMapper;
import com.gxwebsoft.ai.service.AiCloudFileService;
import com.gxwebsoft.ai.entity.AiCloudFile;
import com.gxwebsoft.ai.entity.AiCloudDoc;
import com.gxwebsoft.ai.service.AiCloudDocService;
import com.gxwebsoft.ai.service.KnowledgeBaseService;
import com.gxwebsoft.ai.param.AiCloudFileParam;
import com.gxwebsoft.common.core.web.PageParam;
import com.gxwebsoft.common.core.web.PageResult;
import com.gxwebsoft.oa.entity.OaCompany;
import com.gxwebsoft.oa.service.OaCompanyService;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.concurrent.CompletableFuture;

/**
 * AI云文件表Service实现
 *
 * @author yc
 */
@Slf4j
@Service
public class AiCloudFileServiceImpl extends ServiceImpl<AiCloudFileMapper, AiCloudFile> implements AiCloudFileService {

    @Resource
    private KnowledgeBaseConfig config;

    @Resource
    private KnowledgeBaseClientFactory clientFactory;

    @Resource
    private AiCloudDocService aiCloudDocService;

    @Resource
    private OaCompanyService oaCompanyService;

    @Resource
    private KnowledgeBaseService knowledgeBaseService;

    @Resource
    private FileController fileController;
    
    @Override
    public PageResult<AiCloudFile> pageRel(AiCloudFileParam param) {
        PageParam<AiCloudFile, AiCloudFileParam> page = new PageParam<>(param);
        page.setDefaultOrder("sort_number asc, upload_time desc");
        List<AiCloudFile> list = baseMapper.selectPageRel(page, param);
        return new PageResult<>(list, page.getTotal());
    }

    @Override
    public List<AiCloudFile> listRel(AiCloudFileParam param) {
        List<AiCloudFile> list = baseMapper.selectListRel(param);
        //文件名排序
        list.sort(Comparator.comparing(AiCloudFile::getFileName));
        // 排序
        PageParam<AiCloudFile, AiCloudFileParam> page = new PageParam<>();
        page.setDefaultOrder("sort_number asc, upload_time desc");
        return page.sortRecords(list);
    }

    @Override
    public AiCloudFile getByIdRel(Integer id) {
        AiCloudFileParam param = new AiCloudFileParam();
        param.setId(id);
        return param.getOne(baseMapper.selectListRel(param));
    }

    @Async
    @Override
    public CompletableFuture<String> processFileAsync(String categoryId, Integer docId, MultipartFile file, User loginUser) {
        return CompletableFuture.supplyAsync(() -> {
            try {
                String workspaceId = config.getWorkspaceId();
                Client client = clientFactory.createClient();
                AddFileResponse addFileResponse = AiCloudDataCenterUtil.uploadFile(client, workspaceId, categoryId, file);
                String fileId = addFileResponse.getBody().getData().getFileId();
                
                FileRecord fileRecord = fileController.upload(file, loginUser.getTenantId());
                
                // 保存文件信息到数据库
                AiCloudFile aiCloudFile = new AiCloudFile();
                aiCloudFile.setDocId(docId);
                aiCloudFile.setFileName(file.getOriginalFilename());
                aiCloudFile.setFileSize(file.getSize());
                aiCloudFile.setFileType(getFileExtension(file.getOriginalFilename()));
                aiCloudFile.setFileExt(getFileExtension(file.getOriginalFilename()));
                aiCloudFile.setFileId(fileId);
                aiCloudFile.setFileUrl(fileRecord.getDownloadUrl());
                aiCloudFile.setUploadTime(LocalDateTime.now());
                aiCloudFile.setWorkspaceId(workspaceId);
                
                if (loginUser != null) {
                    aiCloudFile.setUserId(loginUser.getUserId());
                    aiCloudFile.setTenantId(loginUser.getTenantId());
                }
                
                this.save(aiCloudFile);
                log.info("文件上传成功: {}", file.getOriginalFilename());
                return fileId;
                
            } catch (Exception e) {
                log.error("异步处理文件上传失败: {}", e.getMessage(), e);
                throw new RuntimeException("文件上传失败: " + file.getOriginalFilename(), e);
            }
        });
    }

    @Override
    public boolean removeFileWithCloud(Integer id) {
        AiCloudFile aiCloudFile = this.getById(id);
        if (aiCloudFile == null) {
            return false;
        }
        
        try {
            String workspaceId = config.getWorkspaceId();
            Client client = clientFactory.createClient();
            AiCloudDataCenterUtil.deleteFile(client, workspaceId, aiCloudFile.getFileId());
        } catch (Exception e) {
            log.error("删除云文件失败: {}", e.getMessage(), e);
            return false;
        }
        
        return this.removeById(id);
    }

    @Override
    public boolean removeFilesWithCloud(List<Integer> ids) {
        boolean allSuccess = true;
        for (Integer id : ids) {
            if (!removeFileWithCloud(id)) {
                allSuccess = false;
            }
        }
        return allSuccess;
    }

    @Override
    public String getFileExtension(String filename) {
        if (filename == null || filename.lastIndexOf(".") == -1) {
            return "";
        }
        return filename.substring(filename.lastIndexOf(".") + 1);
    }

    @Override
    public String getCompanyKbId(Integer docId) {
        if (docId == null) {
            return "";
        }
        AiCloudDoc aiCloudDoc = aiCloudDocService.getById(docId);
        if (aiCloudDoc == null || aiCloudDoc.getCompanyId() == null) {
            return "";
        }
        OaCompany oaCompany = oaCompanyService.getById(aiCloudDoc.getCompanyId());
        return oaCompany != null && oaCompany.getKbId() != null ? oaCompany.getKbId() : "";
    }

    @Override
    public void submitDocuments(Integer docId, List<String> fileIds) {
        if (docId == null || fileIds == null || fileIds.isEmpty()) {
            return;
        }
        String kbId = getCompanyKbId(docId);
        if (kbId == null || kbId.isEmpty()) {
            return;
        }
        // 异步添加文件
        for(String fileId : fileIds) {
            if (fileId != null && !fileId.isEmpty()) {
                knowledgeBaseService.submitDocuments(kbId, fileId);
            }
        }
    }

    @Override
    public boolean removeFileWithCloudAndIndex(Integer id) {
        AiCloudFile aiCloudFile = this.getById(id);
        if (aiCloudFile == null) {
            return false;
        }
        
        // 删除云文件
        if (!removeFileWithCloud(id)) {
            return false;
        }
        
        // 同时删除默认知识库文件
        String kbId = getCompanyKbId(aiCloudFile.getDocId());
        if (!kbId.isEmpty()) {
            try {
                String workspaceId = config.getWorkspaceId();
                Client client = clientFactory.createClient();
                AiCloudKnowledgeBaseUtil.deleteIndexDocument(client, workspaceId, kbId, Arrays.asList(aiCloudFile.getFileId()));
            } catch (Exception e) {
                log.error("删除知识库索引失败: {}", e.getMessage(), e);
                // 这里可以根据业务需求决定是否抛出异常
            }
        }
        
        return true;
    }

    @Override
    public boolean removeFilesWithCloudAndIndex(List<Integer> ids) {
        boolean allSuccess = true;
        for (Integer id : ids) {
            if (!removeFileWithCloudAndIndex(id)) {
                allSuccess = false;
            }
        }
        return allSuccess;
    }
}