/**
 * 노드 기반 데이터 플로우 API
 */

import { Router, Request, Response } from "express";
import { query, queryOne } from "../../database/db";
import { logger } from "../../utils/logger";
import { NodeFlowExecutionService } from "../../services/nodeFlowExecutionService";
import { AuthenticatedRequest } from "../../types/auth";
import { authenticateToken } from "../../middleware/authMiddleware";

const router = Router();

/**
 * 플로우 목록 조회
 */
router.get("/", async (req: AuthenticatedRequest, res: Response) => {
  try {
    const userCompanyCode = req.user?.companyCode;

    let sqlQuery = `
      SELECT 
        flow_id as "flowId",
        flow_name as "flowName",
        flow_description as "flowDescription",
        company_code as "companyCode",
        created_at as "createdAt",
        updated_at as "updatedAt"
      FROM node_flows
    `;

    const params: any[] = [];

    // 슈퍼 관리자가 아니면 회사별 필터링
    if (userCompanyCode && userCompanyCode !== "*") {
      sqlQuery += ` WHERE company_code = $1`;
      params.push(userCompanyCode);
    }

    sqlQuery += ` ORDER BY updated_at DESC`;

    const flows = await query(sqlQuery, params);

    return res.json({
      success: true,
      data: flows,
    });
  } catch (error) {
    logger.error("플로우 목록 조회 실패:", error);
    return res.status(500).json({
      success: false,
      message: "플로우 목록을 조회하지 못했습니다.",
    });
  }
});

/**
 * 플로우 상세 조회
 */
router.get("/:flowId", async (req: Request, res: Response) => {
  try {
    const { flowId } = req.params;

    const flow = await queryOne(
      `
      SELECT 
        flow_id as "flowId",
        flow_name as "flowName",
        flow_description as "flowDescription",
        flow_data as "flowData",
        created_at as "createdAt",
        updated_at as "updatedAt"
      FROM node_flows
      WHERE flow_id = $1
      `,
      [flowId]
    );

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

    return res.json({
      success: true,
      data: flow,
    });
  } catch (error) {
    logger.error("플로우 조회 실패:", error);
    return res.status(500).json({
      success: false,
      message: "플로우를 조회하지 못했습니다.",
    });
  }
});

/**
 * 플로우 저장 (신규)
 */
router.post("/", async (req: AuthenticatedRequest, res: Response) => {
  try {
    const { flowName, flowDescription, flowData } = req.body;
    const userCompanyCode = req.user?.companyCode || "*";

    if (!flowName || !flowData) {
      return res.status(400).json({
        success: false,
        message: "플로우 이름과 데이터는 필수입니다.",
      });
    }

    const result = await queryOne(
      `
      INSERT INTO node_flows (flow_name, flow_description, flow_data, company_code)
      VALUES ($1, $2, $3, $4)
      RETURNING flow_id as "flowId"
      `,
      [flowName, flowDescription || "", flowData, userCompanyCode]
    );

    logger.info(
      `플로우 저장 성공: ${result.flowId} (회사: ${userCompanyCode})`
    );

    return res.json({
      success: true,
      message: "플로우가 저장되었습니다.",
      data: {
        flowId: result.flowId,
      },
    });
  } catch (error) {
    logger.error("플로우 저장 실패:", error);
    return res.status(500).json({
      success: false,
      message: "플로우를 저장하지 못했습니다.",
    });
  }
});

/**
 * 플로우 수정
 */
router.put("/", async (req: Request, res: Response) => {
  try {
    const { flowId, flowName, flowDescription, flowData } = req.body;

    if (!flowId || !flowName || !flowData) {
      return res.status(400).json({
        success: false,
        message: "플로우 ID, 이름, 데이터는 필수입니다.",
      });
    }

    await query(
      `
      UPDATE node_flows
      SET flow_name = $1,
          flow_description = $2,
          flow_data = $3,
          updated_at = NOW()
      WHERE flow_id = $4
      `,
      [flowName, flowDescription || "", flowData, flowId]
    );

    logger.info(`플로우 수정 성공: ${flowId}`);

    return res.json({
      success: true,
      message: "플로우가 수정되었습니다.",
      data: {
        flowId,
      },
    });
  } catch (error) {
    logger.error("플로우 수정 실패:", error);
    return res.status(500).json({
      success: false,
      message: "플로우를 수정하지 못했습니다.",
    });
  }
});

/**
 * 플로우 삭제
 */
router.delete("/:flowId", async (req: Request, res: Response) => {
  try {
    const { flowId } = req.params;

    await query(
      `
      DELETE FROM node_flows
      WHERE flow_id = $1
      `,
      [flowId]
    );

    logger.info(`플로우 삭제 성공: ${flowId}`);

    return res.json({
      success: true,
      message: "플로우가 삭제되었습니다.",
    });
  } catch (error) {
    logger.error("플로우 삭제 실패:", error);
    return res.status(500).json({
      success: false,
      message: "플로우를 삭제하지 못했습니다.",
    });
  }
});

/**
 * 플로우 실행
 * POST /api/dataflow/node-flows/:flowId/execute
 */
router.post("/:flowId/execute", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  try {
    const { flowId } = req.params;
    const contextData = req.body;

    logger.info(`🚀 플로우 실행 요청: flowId=${flowId}`, {
      contextDataKeys: Object.keys(contextData),
      userId: req.user?.userId,
      companyCode: req.user?.companyCode,
    });

    // 사용자 정보를 contextData에 추가
    const enrichedContextData = {
      ...contextData,
      userId: req.user?.userId,
      userName: req.user?.userName,
      companyCode: req.user?.companyCode,
    };

    // 플로우 실행
    const result = await NodeFlowExecutionService.executeFlow(
      parseInt(flowId, 10),
      enrichedContextData
    );

    return res.json({
      success: result.success,
      message: result.message,
      data: result,
    });
  } catch (error) {
    logger.error("플로우 실행 실패:", error);
    return res.status(500).json({
      success: false,
      message:
        error instanceof Error
          ? error.message
          : "플로우 실행 중 오류가 발생했습니다.",
    });
  }
});

export default router;