/**
 * 채번 규칙 관리 컨트롤러
 */

import { Router, Response } from "express";
import { authenticateToken, AuthenticatedRequest } from "../middleware/authMiddleware";
import { numberingRuleService } from "../services/numberingRuleService";
import { logger } from "../utils/logger";

const router = Router();

// 규칙 목록 조회 (전체)
router.get("/", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;

  try {
    const rules = await numberingRuleService.getRuleList(companyCode);
    return res.json({ success: true, data: rules });
  } catch (error: any) {
    logger.error("규칙 목록 조회 실패", { error: error.message });
    return res.status(500).json({ success: false, error: error.message });
  }
});

// 메뉴별 사용 가능한 규칙 조회
router.get("/available/:menuObjid?", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;
  const menuObjid = req.params.menuObjid ? parseInt(req.params.menuObjid) : undefined;

  logger.info("📥 메뉴별 채번 규칙 조회 요청", { companyCode, menuObjid });

  try {
    const rules = await numberingRuleService.getAvailableRulesForMenu(companyCode, menuObjid);
    
    logger.info("✅ 메뉴별 채번 규칙 조회 성공 (컨트롤러)", { 
      companyCode, 
      menuObjid,
      rulesCount: rules.length 
    });
    
    return res.json({ success: true, data: rules });
  } catch (error: any) {
    logger.error("❌ 메뉴별 사용 가능한 규칙 조회 실패 (컨트롤러)", {
      error: error.message,
      errorCode: error.code,
      errorStack: error.stack,
      companyCode,
      menuObjid,
    });
    return res.status(500).json({ success: false, error: error.message });
  }
});

// 화면용 채번 규칙 조회 (테이블 기반 필터링 - 간소화)
router.get("/available-for-screen", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;
  const { tableName } = req.query;

  try {
    // tableName 필수 검증
    if (!tableName || typeof tableName !== "string") {
      return res.status(400).json({
        success: false,
        error: "tableName is required",
      });
    }

    const rules = await numberingRuleService.getAvailableRulesForScreen(
      companyCode,
      tableName
    );

    logger.info("화면용 채번 규칙 조회 성공", {
      companyCode,
      tableName,
      count: rules.length,
    });

    return res.json({ success: true, data: rules });
  } catch (error: any) {
    logger.error("화면용 채번 규칙 조회 실패", {
      error: error.message,
      tableName,
    });
    return res.status(500).json({
      success: false,
      error: error.message,
    });
  }
});

// 특정 규칙 조회
router.get("/:ruleId", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;
  const { ruleId } = req.params;

  try {
    const rule = await numberingRuleService.getRuleById(ruleId, companyCode);
    if (!rule) {
      return res.status(404).json({ success: false, error: "규칙을 찾을 수 없습니다" });
    }
    return res.json({ success: true, data: rule });
  } catch (error: any) {
    logger.error("규칙 조회 실패", { error: error.message });
    return res.status(500).json({ success: false, error: error.message });
  }
});

// 규칙 생성
router.post("/", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;
  const userId = req.user!.userId;
  const ruleConfig = req.body;

  try {
    if (!ruleConfig.ruleId || !ruleConfig.ruleName) {
      return res.status(400).json({ success: false, error: "규칙 ID와 규칙명은 필수입니다" });
    }

    if (!Array.isArray(ruleConfig.parts) || ruleConfig.parts.length === 0) {
      return res.status(400).json({ success: false, error: "최소 1개 이상의 규칙 파트가 필요합니다" });
    }

    const newRule = await numberingRuleService.createRule(ruleConfig, companyCode, userId);
    return res.status(201).json({ success: true, data: newRule });
  } catch (error: any) {
    if (error.code === "23505") {
      return res.status(409).json({ success: false, error: "이미 존재하는 규칙 ID입니다" });
    }
    logger.error("규칙 생성 실패", { error: error.message });
    return res.status(500).json({ success: false, error: error.message });
  }
});

// 규칙 수정
router.put("/:ruleId", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;
  const { ruleId } = req.params;
  const updates = req.body;

  try {
    const updatedRule = await numberingRuleService.updateRule(ruleId, updates, companyCode);
    return res.json({ success: true, data: updatedRule });
  } catch (error: any) {
    if (error.message.includes("찾을 수 없거나")) {
      return res.status(404).json({ success: false, error: error.message });
    }
    logger.error("규칙 수정 실패", { error: error.message });
    return res.status(500).json({ success: false, error: error.message });
  }
});

// 규칙 삭제
router.delete("/:ruleId", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;
  const { ruleId } = req.params;

  try {
    await numberingRuleService.deleteRule(ruleId, companyCode);
    return res.json({ success: true, message: "규칙이 삭제되었습니다" });
  } catch (error: any) {
    if (error.message.includes("찾을 수 없거나")) {
      return res.status(404).json({ success: false, error: error.message });
    }
    logger.error("규칙 삭제 실패", { error: error.message });
    return res.status(500).json({ success: false, error: error.message });
  }
});

// 코드 미리보기 (순번 증가 없음)
router.post("/:ruleId/preview", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;
  const { ruleId } = req.params;

  try {
    const previewCode = await numberingRuleService.previewCode(ruleId, companyCode);
    return res.json({ success: true, data: { generatedCode: previewCode } });
  } catch (error: any) {
    logger.error("코드 미리보기 실패", { error: error.message });
    return res.status(500).json({ success: false, error: error.message });
  }
});

// 코드 할당 (저장 시점에 실제 순번 증가)
router.post("/:ruleId/allocate", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;
  const { ruleId } = req.params;

  try {
    const allocatedCode = await numberingRuleService.allocateCode(ruleId, companyCode);
    return res.json({ success: true, data: { generatedCode: allocatedCode } });
  } catch (error: any) {
    logger.error("코드 할당 실패", { error: error.message });
    return res.status(500).json({ success: false, error: error.message });
  }
});

// 코드 생성 (기존 호환성 유지, deprecated)
router.post("/:ruleId/generate", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;
  const { ruleId } = req.params;

  try {
    const generatedCode = await numberingRuleService.generateCode(ruleId, companyCode);
    return res.json({ success: true, data: { generatedCode } });
  } catch (error: any) {
    logger.error("코드 생성 실패", { error: error.message });
    return res.status(500).json({ success: false, error: error.message });
  }
});

// 시퀀스 초기화
router.post("/:ruleId/reset", authenticateToken, async (req: AuthenticatedRequest, res: Response) => {
  const companyCode = req.user!.companyCode;
  const { ruleId } = req.params;

  try {
    await numberingRuleService.resetSequence(ruleId, companyCode);
    return res.json({ success: true, message: "시퀀스가 초기화되었습니다" });
  } catch (error: any) {
    logger.error("시퀀스 초기화 실패", { error: error.message });
    return res.status(500).json({ success: false, error: error.message });
  }
});

export default router;