/**
 * 리포트 관리 컨트롤러
 */

import { Request, Response, NextFunction } from "express";
import reportService from "../services/reportService";
import {
  CreateReportRequest,
  UpdateReportRequest,
  SaveLayoutRequest,
  CreateTemplateRequest,
} from "../types/report";
import path from "path";
import fs from "fs";

export class ReportController {
  /**
   * 리포트 목록 조회
   * GET /api/admin/reports
   */
  async getReports(req: Request, res: Response, next: NextFunction) {
    try {
      const {
        page = "1",
        limit = "20",
        searchText = "",
        reportType = "",
        useYn = "Y",
        sortBy = "created_at",
        sortOrder = "DESC",
      } = req.query;

      const result = await reportService.getReports({
        page: parseInt(page as string, 10),
        limit: parseInt(limit as string, 10),
        searchText: searchText as string,
        reportType: reportType as string,
        useYn: useYn as string,
        sortBy: sortBy as string,
        sortOrder: sortOrder as "ASC" | "DESC",
      });

      return res.json({
        success: true,
        data: result,
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 리포트 상세 조회
   * GET /api/admin/reports/:reportId
   */
  async getReportById(req: Request, res: Response, next: NextFunction) {
    try {
      const { reportId } = req.params;

      const report = await reportService.getReportById(reportId);

      if (!report) {
        return res.status(404).json({
          success: false,
          message: "리포트를 찾을 수 없습니다.",
        });
      }

      return res.json({
        success: true,
        data: report,
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 리포트 생성
   * POST /api/admin/reports
   */
  async createReport(req: Request, res: Response, next: NextFunction) {
    try {
      const data: CreateReportRequest = req.body;
      const userId = (req as any).user?.userId || "SYSTEM";

      // 필수 필드 검증
      if (!data.reportNameKor || !data.reportType) {
        return res.status(400).json({
          success: false,
          message: "리포트명과 리포트 타입은 필수입니다.",
        });
      }

      const reportId = await reportService.createReport(data, userId);

      return res.status(201).json({
        success: true,
        data: {
          reportId,
        },
        message: "리포트가 생성되었습니다.",
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 리포트 수정
   * PUT /api/admin/reports/:reportId
   */
  async updateReport(req: Request, res: Response, next: NextFunction) {
    try {
      const { reportId } = req.params;
      const data: UpdateReportRequest = req.body;
      const userId = (req as any).user?.userId || "SYSTEM";

      const success = await reportService.updateReport(reportId, data, userId);

      if (!success) {
        return res.status(400).json({
          success: false,
          message: "수정할 내용이 없습니다.",
        });
      }

      return res.json({
        success: true,
        message: "리포트가 수정되었습니다.",
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 리포트 삭제
   * DELETE /api/admin/reports/:reportId
   */
  async deleteReport(req: Request, res: Response, next: NextFunction) {
    try {
      const { reportId } = req.params;

      const success = await reportService.deleteReport(reportId);

      if (!success) {
        return res.status(404).json({
          success: false,
          message: "리포트를 찾을 수 없습니다.",
        });
      }

      return res.json({
        success: true,
        message: "리포트가 삭제되었습니다.",
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 리포트 복사
   * POST /api/admin/reports/:reportId/copy
   */
  async copyReport(req: Request, res: Response, next: NextFunction) {
    try {
      const { reportId } = req.params;
      const userId = (req as any).user?.userId || "SYSTEM";

      const newReportId = await reportService.copyReport(reportId, userId);

      if (!newReportId) {
        return res.status(404).json({
          success: false,
          message: "리포트를 찾을 수 없습니다.",
        });
      }

      return res.status(201).json({
        success: true,
        data: {
          reportId: newReportId,
        },
        message: "리포트가 복사되었습니다.",
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 레이아웃 조회
   * GET /api/admin/reports/:reportId/layout
   */
  async getLayout(req: Request, res: Response, next: NextFunction) {
    try {
      const { reportId } = req.params;

      const layout = await reportService.getLayout(reportId);

      if (!layout) {
        return res.status(404).json({
          success: false,
          message: "레이아웃을 찾을 수 없습니다.",
        });
      }

      // components JSON 파싱
      const layoutData = {
        ...layout,
        components: layout.components ? JSON.parse(layout.components) : [],
      };

      return res.json({
        success: true,
        data: layoutData,
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 레이아웃 저장
   * PUT /api/admin/reports/:reportId/layout
   */
  async saveLayout(req: Request, res: Response, next: NextFunction) {
    try {
      const { reportId } = req.params;
      const data: SaveLayoutRequest = req.body;
      const userId = (req as any).user?.userId || "SYSTEM";

      // 필수 필드 검증
      if (
        !data.canvasWidth ||
        !data.canvasHeight ||
        !data.pageOrientation ||
        !data.components
      ) {
        return res.status(400).json({
          success: false,
          message: "필수 레이아웃 정보가 누락되었습니다.",
        });
      }

      await reportService.saveLayout(reportId, data, userId);

      return res.json({
        success: true,
        message: "레이아웃이 저장되었습니다.",
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 템플릿 목록 조회
   * GET /api/admin/reports/templates
   */
  async getTemplates(req: Request, res: Response, next: NextFunction) {
    try {
      const templates = await reportService.getTemplates();

      return res.json({
        success: true,
        data: templates,
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 템플릿 생성
   * POST /api/admin/reports/templates
   */
  async createTemplate(req: Request, res: Response, next: NextFunction) {
    try {
      const data: CreateTemplateRequest = req.body;
      const userId = (req as any).user?.userId || "SYSTEM";

      // 필수 필드 검증
      if (!data.templateNameKor || !data.templateType) {
        return res.status(400).json({
          success: false,
          message: "템플릿명과 템플릿 타입은 필수입니다.",
        });
      }

      const templateId = await reportService.createTemplate(data, userId);

      return res.status(201).json({
        success: true,
        data: {
          templateId,
        },
        message: "템플릿이 생성되었습니다.",
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 현재 리포트를 템플릿으로 저장
   * POST /api/admin/reports/:reportId/save-as-template
   */
  async saveAsTemplate(req: Request, res: Response, next: NextFunction) {
    try {
      const { reportId } = req.params;
      const { templateNameKor, templateNameEng, description } = req.body;
      const userId = (req as any).user?.userId || "SYSTEM";

      // 필수 필드 검증
      if (!templateNameKor) {
        return res.status(400).json({
          success: false,
          message: "템플릿명은 필수입니다.",
        });
      }

      const templateId = await reportService.saveAsTemplate(
        reportId,
        templateNameKor,
        templateNameEng,
        description,
        userId
      );

      return res.status(201).json({
        success: true,
        data: {
          templateId,
        },
        message: "템플릿이 저장되었습니다.",
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 레이아웃 데이터로 직접 템플릿 생성 (리포트 저장 불필요)
   * POST /api/admin/reports/templates/create-from-layout
   */
  async createTemplateFromLayout(
    req: Request,
    res: Response,
    next: NextFunction
  ) {
    try {
      const {
        templateNameKor,
        templateNameEng,
        templateType,
        description,
        layoutConfig,
        defaultQueries = [],
      } = req.body;
      const userId = (req as any).user?.userId || "SYSTEM";

      // 필수 필드 검증
      if (!templateNameKor) {
        return res.status(400).json({
          success: false,
          message: "템플릿명은 필수입니다.",
        });
      }

      if (!layoutConfig) {
        return res.status(400).json({
          success: false,
          message: "레이아웃 설정은 필수입니다.",
        });
      }

      const templateId = await reportService.createTemplateFromLayout(
        templateNameKor,
        templateNameEng,
        templateType || "GENERAL",
        description,
        layoutConfig,
        defaultQueries,
        userId
      );

      return res.status(201).json({
        success: true,
        data: {
          templateId,
        },
        message: "템플릿이 생성되었습니다.",
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 템플릿 삭제
   * DELETE /api/admin/reports/templates/:templateId
   */
  async deleteTemplate(req: Request, res: Response, next: NextFunction) {
    try {
      const { templateId } = req.params;

      const success = await reportService.deleteTemplate(templateId);

      if (!success) {
        return res.status(404).json({
          success: false,
          message: "템플릿을 찾을 수 없거나 시스템 템플릿입니다.",
        });
      }

      return res.json({
        success: true,
        message: "템플릿이 삭제되었습니다.",
      });
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 쿼리 실행
   * POST /api/admin/reports/:reportId/queries/:queryId/execute
   */
  async executeQuery(req: Request, res: Response, next: NextFunction) {
    try {
      const { reportId, queryId } = req.params;
      const { parameters = {}, sqlQuery, externalConnectionId } = req.body;

      const result = await reportService.executeQuery(
        reportId,
        queryId,
        parameters,
        sqlQuery,
        externalConnectionId
      );

      return res.json({
        success: true,
        data: result,
      });
    } catch (error: any) {
      return res.status(400).json({
        success: false,
        message: error.message || "쿼리 실행에 실패했습니다.",
      });
    }
  }

  /**
   * 외부 DB 연결 목록 조회 (활성화된 것만)
   * GET /api/admin/reports/external-connections
   */
  async getExternalConnections(
    req: Request,
    res: Response,
    next: NextFunction
  ) {
    try {
      const { ExternalDbConnectionService } = await import(
        "../services/externalDbConnectionService"
      );

      const result = await ExternalDbConnectionService.getConnections({
        is_active: "Y",
        company_code: req.body.companyCode || "",
      });

      return res.json(result);
    } catch (error) {
      return next(error);
    }
  }

  /**
   * 이미지 파일 업로드
   * POST /api/admin/reports/upload-image
   */
  async uploadImage(req: Request, res: Response, next: NextFunction) {
    try {
      if (!req.file) {
        return res.status(400).json({
          success: false,
          message: "이미지 파일이 필요합니다.",
        });
      }

      const companyCode = req.body.companyCode || "SYSTEM";
      const file = req.file;

      // 파일 저장 경로 생성
      const uploadDir = path.join(
        process.cwd(),
        "uploads",
        `company_${companyCode}`,
        "reports"
      );

      // 디렉토리가 없으면 생성
      if (!fs.existsSync(uploadDir)) {
        fs.mkdirSync(uploadDir, { recursive: true });
      }

      // 고유한 파일명 생성 (타임스탬프 + 원본 파일명)
      const timestamp = Date.now();
      const safeFileName = file.originalname.replace(/[^a-zA-Z0-9._-]/g, "_");
      const fileName = `${timestamp}_${safeFileName}`;
      const filePath = path.join(uploadDir, fileName);

      // 파일 저장
      fs.writeFileSync(filePath, file.buffer);

      // 웹에서 접근 가능한 URL 반환
      const fileUrl = `/uploads/company_${companyCode}/reports/${fileName}`;

      return res.json({
        success: true,
        data: {
          fileName,
          fileUrl,
          originalName: file.originalname,
          size: file.size,
          mimeType: file.mimetype,
        },
      });
    } catch (error) {
      return next(error);
    }
  }
}

export default new ReportController();