package cn.yinlihupo.controller.ai;

import cn.yinlihupo.common.core.BaseResponse;
import cn.yinlihupo.common.util.ResultUtils;
import cn.yinlihupo.common.util.SecurityUtils;
import cn.yinlihupo.domain.vo.KbDocumentVO;
import cn.yinlihupo.service.ai.AiKnowledgeBaseService;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.util.List;

/**
 * AI知识库控制器
 * 提供知识库文件上传、管理等功能
 */
@Slf4j
@RestController
@RequestMapping("/ai/kb")
@RequiredArgsConstructor
@Tag(name = "AI知识库", description = "AI知识库文档管理相关接口")
public class AiKnowledgeBaseController {

    private final AiKnowledgeBaseService knowledgeBaseService;

    /**
     * 上传文件到知识库
     *
     * @param projectId 项目ID
     * @param file      文件
     * @return 文档信息
     */
    @PostMapping("/upload")
    @Operation(summary = "上传文件", description = "上传文件到项目知识库，支持PDF、Word、TXT等格式")
    public BaseResponse<KbDocumentVO> uploadFile(
            @RequestParam Long projectId,
            @RequestParam MultipartFile file) {
        Long userId = SecurityUtils.getCurrentUserId();
        if (userId == null) {
            return ResultUtils.error("用户未登录");
        }

        if (projectId == null) {
            return ResultUtils.error("项目ID不能为空");
        }

        if (file == null || file.isEmpty()) {
            return ResultUtils.error("文件不能为空");
        }

        try {
            KbDocumentVO doc = knowledgeBaseService.uploadFile(projectId, file, userId);
            return ResultUtils.success("上传成功", doc);
        } catch (Exception e) {
            log.error("上传文件失败: {}", e.getMessage(), e);
            return ResultUtils.error("上传失败: " + e.getMessage());
        }
    }

    /**
     * 获取项目知识库文档列表
     *
     * @param projectId 项目ID
     * @return 文档列表
     */
    @GetMapping("/documents")
    @Operation(summary = "获取文档列表", description = "获取指定项目的知识库文档列表")
    public BaseResponse<List<KbDocumentVO>> getDocuments(
            @RequestParam Long projectId) {
        Long userId = SecurityUtils.getCurrentUserId();
        if (userId == null) {
            return ResultUtils.error("用户未登录");
        }

        if (projectId == null) {
            return ResultUtils.error("项目ID不能为空");
        }

        try {
            List<KbDocumentVO> documents = knowledgeBaseService.getProjectDocuments(projectId);
            return ResultUtils.success("查询成功", documents);
        } catch (Exception e) {
            log.error("获取文档列表失败: {}", e.getMessage(), e);
            return ResultUtils.error("获取文档列表失败: " + e.getMessage());
        }
    }

    /**
     * 删除知识库文档
     *
     * @param docId 文档UUID
     * @return 操作结果
     */
    @DeleteMapping("/document/{docId}")
    @Operation(summary = "删除文档", description = "删除指定的知识库文档")
    public BaseResponse<Void> deleteDocument(@PathVariable String docId) {
        Long userId = SecurityUtils.getCurrentUserId();
        if (userId == null) {
            return ResultUtils.error("用户未登录");
        }

        try {
            knowledgeBaseService.deleteDocument(docId, userId);
            return ResultUtils.success("删除成功", null);
        } catch (Exception e) {
            log.error("删除文档失败: {}", e.getMessage(), e);
            return ResultUtils.error("删除失败: " + e.getMessage());
        }
    }

    /**
     * 重新索引文档
     *
     * @param docId 文档UUID
     * @return 操作结果
     */
    @PostMapping("/document/{docId}/reindex")
    @Operation(summary = "重新索引文档", description = "重新解析并索引指定的文档")
    public BaseResponse<Void> reindexDocument(@PathVariable String docId) {
        Long userId = SecurityUtils.getCurrentUserId();
        if (userId == null) {
            return ResultUtils.error("用户未登录");
        }

        try {
            knowledgeBaseService.reindexDocument(docId, userId);
            return ResultUtils.success("重新索引已启动", null);
        } catch (Exception e) {
            log.error("重新索引文档失败: {}", e.getMessage(), e);
            return ResultUtils.error("重新索引失败: " + e.getMessage());
        }
    }
}