import { PrismaClient } from "@prisma/client";
import { logger } from "../utils/logger";

const prisma = new PrismaClient();

export interface CodeCategory {
  category_code: string;
  category_name: string;
  category_name_eng?: string | null;
  description?: string | null;
  sort_order: number;
  is_active: string;
  created_date?: Date | null;
  created_by?: string | null;
  updated_date?: Date | null;
  updated_by?: string | null;
}

export interface CodeInfo {
  code_category: string;
  code_value: string;
  code_name: string;
  code_name_eng?: string | null;
  description?: string | null;
  sort_order: number;
  is_active: string;
  created_date?: Date | null;
  created_by?: string | null;
  updated_date?: Date | null;
  updated_by?: string | null;
}

export interface GetCategoriesParams {
  search?: string;
  isActive?: boolean;
  page?: number;
  size?: number;
}

export interface GetCodesParams {
  search?: string;
  isActive?: boolean;
}

export interface CreateCategoryData {
  categoryCode: string;
  categoryName: string;
  categoryNameEng?: string;
  description?: string;
  sortOrder?: number;
  isActive?: string;
}

export interface CreateCodeData {
  codeValue: string;
  codeName: string;
  codeNameEng?: string;
  description?: string;
  sortOrder?: number;
  isActive?: string;
}

export class CommonCodeService {
  /**
   * 카테고리 목록 조회
   */
  async getCategories(params: GetCategoriesParams) {
    try {
      const { search, isActive, page = 1, size = 20 } = params;

      let whereClause: any = {};

      if (search) {
        whereClause.OR = [
          { category_name: { contains: search, mode: "insensitive" } },
          { category_code: { contains: search, mode: "insensitive" } },
        ];
      }

      if (isActive !== undefined) {
        whereClause.is_active = isActive ? "Y" : "N";
      }

      const offset = (page - 1) * size;

      const [categories, total] = await Promise.all([
        prisma.code_category.findMany({
          where: whereClause,
          orderBy: [{ sort_order: "asc" }, { category_code: "asc" }],
          skip: offset,
          take: size,
        }),
        prisma.code_category.count({ where: whereClause }),
      ]);

      logger.info(
        `카테고리 조회 완료: ${categories.length}개, 전체: ${total}개`
      );

      return {
        data: categories,
        total,
      };
    } catch (error) {
      logger.error("카테고리 조회 중 오류:", error);
      throw error;
    }
  }

  /**
   * 카테고리별 코드 목록 조회
   */
  async getCodes(categoryCode: string, params: GetCodesParams) {
    try {
      const { search, isActive } = params;

      let whereClause: any = {
        code_category: categoryCode,
      };

      if (search) {
        whereClause.OR = [
          { code_name: { contains: search, mode: "insensitive" } },
          { code_value: { contains: search, mode: "insensitive" } },
        ];
      }

      if (isActive !== undefined) {
        whereClause.is_active = isActive ? "Y" : "N";
      }

      const codes = await prisma.code_info.findMany({
        where: whereClause,
        orderBy: [{ sort_order: "asc" }, { code_value: "asc" }],
      });

      logger.info(`코드 조회 완료: ${categoryCode} - ${codes.length}개`);

      return codes;
    } catch (error) {
      logger.error(`코드 조회 중 오류 (${categoryCode}):`, error);
      throw error;
    }
  }

  /**
   * 카테고리 생성
   */
  async createCategory(data: CreateCategoryData, createdBy: string) {
    try {
      const category = await prisma.code_category.create({
        data: {
          category_code: data.categoryCode,
          category_name: data.categoryName,
          category_name_eng: data.categoryNameEng,
          description: data.description,
          sort_order: data.sortOrder || 0,
          is_active: "Y",
          created_by: createdBy,
          updated_by: createdBy,
        },
      });

      logger.info(`카테고리 생성 완료: ${data.categoryCode}`);
      return category;
    } catch (error) {
      logger.error("카테고리 생성 중 오류:", error);
      throw error;
    }
  }

  /**
   * 카테고리 수정
   */
  async updateCategory(
    categoryCode: string,
    data: Partial<CreateCategoryData>,
    updatedBy: string
  ) {
    try {
      // 디버깅: 받은 데이터 로그
      logger.info(`카테고리 수정 데이터:`, { categoryCode, data });
      const category = await prisma.code_category.update({
        where: { category_code: categoryCode },
        data: {
          category_name: data.categoryName,
          category_name_eng: data.categoryNameEng,
          description: data.description,
          sort_order: data.sortOrder,
          is_active:
            typeof data.isActive === "boolean"
              ? data.isActive
                ? "Y"
                : "N"
              : data.isActive, // boolean이면 "Y"/"N"으로 변환
          updated_by: updatedBy,
          updated_date: new Date(),
        },
      });

      logger.info(`카테고리 수정 완료: ${categoryCode}`);
      return category;
    } catch (error) {
      logger.error(`카테고리 수정 중 오류 (${categoryCode}):`, error);
      throw error;
    }
  }

  /**
   * 카테고리 삭제
   */
  async deleteCategory(categoryCode: string) {
    try {
      await prisma.code_category.delete({
        where: { category_code: categoryCode },
      });

      logger.info(`카테고리 삭제 완료: ${categoryCode}`);
    } catch (error) {
      logger.error(`카테고리 삭제 중 오류 (${categoryCode}):`, error);
      throw error;
    }
  }

  /**
   * 코드 생성
   */
  async createCode(
    categoryCode: string,
    data: CreateCodeData,
    createdBy: string
  ) {
    try {
      const code = await prisma.code_info.create({
        data: {
          code_category: categoryCode,
          code_value: data.codeValue,
          code_name: data.codeName,
          code_name_eng: data.codeNameEng,
          description: data.description,
          sort_order: data.sortOrder || 0,
          is_active: "Y",
          created_by: createdBy,
          updated_by: createdBy,
        },
      });

      logger.info(`코드 생성 완료: ${categoryCode}.${data.codeValue}`);
      return code;
    } catch (error) {
      logger.error(
        `코드 생성 중 오류 (${categoryCode}.${data.codeValue}):`,
        error
      );
      throw error;
    }
  }

  /**
   * 코드 수정
   */
  async updateCode(
    categoryCode: string,
    codeValue: string,
    data: Partial<CreateCodeData>,
    updatedBy: string
  ) {
    try {
      // 디버깅: 받은 데이터 로그
      logger.info(`코드 수정 데이터:`, { categoryCode, codeValue, data });
      const code = await prisma.code_info.update({
        where: {
          code_category_code_value: {
            code_category: categoryCode,
            code_value: codeValue,
          },
        },
        data: {
          code_name: data.codeName,
          code_name_eng: data.codeNameEng,
          description: data.description,
          sort_order: data.sortOrder,
          is_active:
            typeof data.isActive === "boolean"
              ? data.isActive
                ? "Y"
                : "N"
              : data.isActive, // boolean이면 "Y"/"N"으로 변환
          updated_by: updatedBy,
          updated_date: new Date(),
        },
      });

      logger.info(`코드 수정 완료: ${categoryCode}.${codeValue}`);
      return code;
    } catch (error) {
      logger.error(`코드 수정 중 오류 (${categoryCode}.${codeValue}):`, error);
      throw error;
    }
  }

  /**
   * 코드 삭제
   */
  async deleteCode(categoryCode: string, codeValue: string) {
    try {
      await prisma.code_info.delete({
        where: {
          code_category_code_value: {
            code_category: categoryCode,
            code_value: codeValue,
          },
        },
      });

      logger.info(`코드 삭제 완료: ${categoryCode}.${codeValue}`);
    } catch (error) {
      logger.error(`코드 삭제 중 오류 (${categoryCode}.${codeValue}):`, error);
      throw error;
    }
  }

  /**
   * 카테고리별 옵션 조회 (화면관리용)
   */
  async getCodeOptions(categoryCode: string) {
    try {
      const codes = await prisma.code_info.findMany({
        where: {
          code_category: categoryCode,
          is_active: "Y",
        },
        select: {
          code_value: true,
          code_name: true,
          code_name_eng: true,
          sort_order: true,
        },
        orderBy: [{ sort_order: "asc" }, { code_value: "asc" }],
      });

      const options = codes.map((code) => ({
        value: code.code_value,
        label: code.code_name,
        labelEng: code.code_name_eng,
      }));

      logger.info(`코드 옵션 조회 완료: ${categoryCode} - ${options.length}개`);
      return options;
    } catch (error) {
      logger.error(`코드 옵션 조회 중 오류 (${categoryCode}):`, error);
      throw error;
    }
  }

  /**
   * 코드 순서 변경
   */
  async reorderCodes(
    categoryCode: string,
    codes: Array<{ codeValue: string; sortOrder: number }>,
    updatedBy: string
  ) {
    try {
      // 먼저 존재하는 코드들을 확인
      const existingCodes = await prisma.code_info.findMany({
        where: {
          code_category: categoryCode,
          code_value: { in: codes.map((c) => c.codeValue) },
        },
        select: { code_value: true },
      });

      const existingCodeValues = existingCodes.map((c) => c.code_value);
      const validCodes = codes.filter((c) =>
        existingCodeValues.includes(c.codeValue)
      );

      if (validCodes.length === 0) {
        throw new Error(
          `카테고리 ${categoryCode}에 순서를 변경할 유효한 코드가 없습니다.`
        );
      }

      const updatePromises = validCodes.map(({ codeValue, sortOrder }) =>
        prisma.code_info.update({
          where: {
            code_category_code_value: {
              code_category: categoryCode,
              code_value: codeValue,
            },
          },
          data: {
            sort_order: sortOrder,
            updated_by: updatedBy,
            updated_date: new Date(),
          },
        })
      );

      await Promise.all(updatePromises);

      const skippedCodes = codes.filter(
        (c) => !existingCodeValues.includes(c.codeValue)
      );
      if (skippedCodes.length > 0) {
        logger.warn(
          `코드 순서 변경 시 존재하지 않는 코드들을 건너뜀: ${skippedCodes.map((c) => c.codeValue).join(", ")}`
        );
      }

      logger.info(
        `코드 순서 변경 완료: ${categoryCode} - ${validCodes.length}개 (전체 ${codes.length}개 중)`
      );
    } catch (error) {
      logger.error(`코드 순서 변경 중 오류 (${categoryCode}):`, error);
      throw error;
    }
  }
}