ERP-node/backend-node/src/services/screenManagementService.ts

import prisma from "../config/database";
import {
  ScreenDefinition,
  CreateScreenRequest,
  UpdateScreenRequest,
  LayoutData,
  SaveLayoutRequest,
  ScreenTemplate,
  MenuAssignmentRequest,
  PaginatedResponse,
  ComponentData,
  ColumnInfo,
  ColumnWebTypeSetting,
  WebType,
  WidgetData,
} from "../types/screen";
import { generateId } from "../utils/generateId";

// 백엔드에서 사용할 테이블 정보 타입
interface TableInfo {
  tableName: string;
  tableLabel: string;
  columns: ColumnInfo[];
}

export class ScreenManagementService {
  // ========================================
  // 화면 정의 관리
  // ========================================

  /**
   * 화면 정의 생성
   */
  async createScreen(
    screenData: CreateScreenRequest,
    userCompanyCode: string
  ): Promise<ScreenDefinition> {
    // 화면 코드 중복 확인
    const existingScreen = await prisma.screen_definitions.findUnique({
      where: { screen_code: screenData.screenCode },
    });

    if (existingScreen) {
      throw new Error("이미 존재하는 화면 코드입니다.");
    }

    const screen = await prisma.screen_definitions.create({
      data: {
        screen_name: screenData.screenName,
        screen_code: screenData.screenCode,
        table_name: screenData.tableName,
        company_code: screenData.companyCode,
        description: screenData.description,
        created_by: screenData.createdBy,
      },
    });

    return this.mapToScreenDefinition(screen);
  }

  /**
   * 회사별 화면 목록 조회 (페이징 지원)
   */
  async getScreensByCompany(
    companyCode: string,
    page: number = 1,
    size: number = 20
  ): Promise<PaginatedResponse<ScreenDefinition>> {
    const whereClause =
      companyCode === "*" ? {} : { company_code: companyCode };

    const [screens, total] = await Promise.all([
      prisma.screen_definitions.findMany({
        where: whereClause,
        skip: (page - 1) * size,
        take: size,
        orderBy: { created_date: "desc" },
      }),
      prisma.screen_definitions.count({ where: whereClause }),
    ]);

    return {
      data: screens.map((screen) => this.mapToScreenDefinition(screen)),
      pagination: {
        page,
        size,
        total,
        totalPages: Math.ceil(total / size),
      },
    };
  }

  /**
   * 화면 목록 조회 (간단 버전)
   */
  async getScreens(companyCode: string): Promise<ScreenDefinition[]> {
    const whereClause =
      companyCode === "*" ? {} : { company_code: companyCode };

    const screens = await prisma.screen_definitions.findMany({
      where: whereClause,
      orderBy: { created_date: "desc" },
    });

    return screens.map((screen) => this.mapToScreenDefinition(screen));
  }

  /**
   * 화면 정의 조회
   */
  async getScreenById(screenId: number): Promise<ScreenDefinition | null> {
    const screen = await prisma.screen_definitions.findUnique({
      where: { screen_id: screenId },
    });

    return screen ? this.mapToScreenDefinition(screen) : null;
  }

  /**
   * 화면 정의 조회 (회사 코드 검증 포함)
   */
  async getScreen(
    screenId: number,
    companyCode: string
  ): Promise<ScreenDefinition | null> {
    const whereClause: any = { screen_id: screenId };

    // 회사 코드가 '*'가 아닌 경우 회사별 필터링
    if (companyCode !== "*") {
      whereClause.company_code = companyCode;
    }

    const screen = await prisma.screen_definitions.findUnique({
      where: whereClause,
    });

    return screen ? this.mapToScreenDefinition(screen) : null;
  }

  /**
   * 화면 정의 수정
   */
  async updateScreen(
    screenId: number,
    updateData: UpdateScreenRequest,
    userCompanyCode: string
  ): Promise<ScreenDefinition> {
    // 권한 확인
    const existingScreen = await prisma.screen_definitions.findUnique({
      where: { screen_id: screenId },
    });

    if (!existingScreen) {
      throw new Error("화면을 찾을 수 없습니다.");
    }

    if (
      userCompanyCode !== "*" &&
      existingScreen.company_code !== userCompanyCode
    ) {
      throw new Error("이 화면을 수정할 권한이 없습니다.");
    }

    const screen = await prisma.screen_definitions.update({
      where: { screen_id: screenId },
      data: {
        screen_name: updateData.screenName,
        description: updateData.description,
        is_active: updateData.isActive ? "Y" : "N",
        updated_by: updateData.updatedBy,
        updated_date: new Date(),
      },
    });

    return this.mapToScreenDefinition(screen);
  }

  /**
   * 화면 정의 삭제
   */
  async deleteScreen(screenId: number, userCompanyCode: string): Promise<void> {
    // 권한 확인
    const existingScreen = await prisma.screen_definitions.findUnique({
      where: { screen_id: screenId },
    });

    if (!existingScreen) {
      throw new Error("화면을 찾을 수 없습니다.");
    }

    if (
      userCompanyCode !== "*" &&
      existingScreen.company_code !== userCompanyCode
    ) {
      throw new Error("이 화면을 삭제할 권한이 없습니다.");
    }

    await prisma.screen_definitions.delete({
      where: { screen_id: screenId },
    });
  }

  // ========================================
  // 테이블 관리
  // ========================================

  /**
   * 테이블 목록 조회
   */
  async getTables(companyCode: string): Promise<TableInfo[]> {
    try {
      // PostgreSQL에서 사용 가능한 테이블 목록 조회
      const tables = await prisma.$queryRaw<Array<{ table_name: string }>>`
        SELECT table_name 
        FROM information_schema.tables 
        WHERE table_schema = 'public' 
        AND table_type = 'BASE TABLE'
        ORDER BY table_name
      `;

      // 각 테이블의 컬럼 정보도 함께 조회
      const tableInfos: TableInfo[] = [];

      for (const table of tables) {
        const columns = await this.getTableColumns(
          table.table_name,
          companyCode
        );
        if (columns.length > 0) {
          tableInfos.push({
            tableName: table.table_name,
            tableLabel: this.getTableLabel(table.table_name),
            columns: columns,
          });
        }
      }

      return tableInfos;
    } catch (error) {
      console.error("테이블 목록 조회 실패:", error);
      throw new Error("테이블 목록을 조회할 수 없습니다.");
    }
  }

  /**
   * 테이블 컬럼 정보 조회
   */
  async getTableColumns(
    tableName: string,
    companyCode: string
  ): Promise<ColumnInfo[]> {
    try {
      // 테이블 컬럼 정보 조회
      const columns = await prisma.$queryRaw<
        Array<{
          column_name: string;
          data_type: string;
          is_nullable: string;
          column_default: string | null;
          character_maximum_length: number | null;
          numeric_precision: number | null;
          numeric_scale: number | null;
        }>
      >`
        SELECT 
          column_name,
          data_type,
          is_nullable,
          column_default,
          character_maximum_length,
          numeric_precision,
          numeric_scale
        FROM information_schema.columns 
        WHERE table_schema = 'public' 
        AND table_name = ${tableName}
        ORDER BY ordinal_position
      `;

      // column_labels 테이블에서 웹타입 정보 조회 (있는 경우)
      const webTypeInfo = await prisma.column_labels.findMany({
        where: { table_name: tableName },
        select: {
          column_name: true,
          web_type: true,
          column_label: true,
          detail_settings: true,
        },
      });

      // 컬럼 정보 매핑
      return columns.map((column) => {
        const webTypeData = webTypeInfo.find(
          (wt) => wt.column_name === column.column_name
        );

        return {
          tableName: tableName,
          columnName: column.column_name,
          columnLabel:
            webTypeData?.column_label ||
            this.getColumnLabel(column.column_name),
          dataType: column.data_type,
          webType:
            (webTypeData?.web_type as WebType) ||
            this.inferWebType(column.data_type),
          isNullable: column.is_nullable,
          columnDefault: column.column_default || undefined,
          characterMaximumLength: column.character_maximum_length || undefined,
          numericPrecision: column.numeric_precision || undefined,
          numericScale: column.numeric_scale || undefined,
          detailSettings: webTypeData?.detail_settings || undefined,
        };
      });
    } catch (error) {
      console.error("테이블 컬럼 조회 실패:", error);
      throw new Error("테이블 컬럼 정보를 조회할 수 없습니다.");
    }
  }

  /**
   * 테이블 라벨 생성
   */
  private getTableLabel(tableName: string): string {
    // snake_case를 읽기 쉬운 형태로 변환
    return tableName
      .replace(/_/g, " ")
      .replace(/\b\w/g, (l) => l.toUpperCase())
      .replace(/\s+/g, " ")
      .trim();
  }

  /**
   * 컬럼 라벨 생성
   */
  private getColumnLabel(columnName: string): string {
    // snake_case를 읽기 쉬운 형태로 변환
    return columnName
      .replace(/_/g, " ")
      .replace(/\b\w/g, (l) => l.toUpperCase())
      .replace(/\s+/g, " ")
      .trim();
  }

  /**
   * 데이터 타입으로부터 웹타입 추론
   */
  private inferWebType(dataType: string): WebType {
    const lowerType = dataType.toLowerCase();

    if (lowerType.includes("char") || lowerType.includes("text")) {
      return "text";
    } else if (
      lowerType.includes("int") ||
      lowerType.includes("numeric") ||
      lowerType.includes("decimal")
    ) {
      return "number";
    } else if (lowerType.includes("date") || lowerType.includes("time")) {
      return "date";
    } else if (lowerType.includes("bool")) {
      return "checkbox";
    } else {
      return "text";
    }
  }

  // ========================================
  // 레이아웃 관리
  // ========================================

  /**
   * 레이아웃 저장
   */
  async saveLayout(
    screenId: number,
    layoutData: LayoutData,
    companyCode: string
  ): Promise<void> {
    console.log(`=== 레이아웃 저장 시작 ===`);
    console.log(`화면 ID: ${screenId}`);
    console.log(`컴포넌트 수: ${layoutData.components.length}`);

    // 권한 확인
    const existingScreen = await prisma.screen_definitions.findUnique({
      where: { screen_id: screenId },
    });

    if (!existingScreen) {
      throw new Error("화면을 찾을 수 없습니다.");
    }

    if (companyCode !== "*" && existingScreen.company_code !== companyCode) {
      throw new Error("이 화면의 레이아웃을 저장할 권한이 없습니다.");
    }

    // 기존 레이아웃 삭제
    await prisma.screen_layouts.deleteMany({
      where: { screen_id: screenId },
    });

    // 새 레이아웃 저장
    for (const component of layoutData.components) {
      const { id, ...componentData } = component;

      console.log(`저장 중인 컴포넌트:`, {
        id: component.id,
        type: component.type,
        position: component.position,
        size: component.size,
        parentId: component.parentId,
        title: (component as any).title,
      });

      // Prisma JSON 필드에 맞는 타입으로 변환
      const properties: any = {
        ...componentData,
        position: {
          x: component.position.x,
          y: component.position.y,
          z: component.position.z || 1, // z 값 포함
        },
        size: {
          width: component.size.width,
          height: component.size.height,
        },
      };

      await prisma.screen_layouts.create({
        data: {
          screen_id: screenId,
          component_type: component.type,
          component_id: component.id,
          parent_id: component.parentId || null,
          position_x: component.position.x,
          position_y: component.position.y,
          width: component.size.width,
          height: component.size.height,
          properties: properties,
        },
      });
    }

    console.log(`=== 레이아웃 저장 완료 ===`);
  }

  /**
   * 레이아웃 조회
   */
  async getLayout(
    screenId: number,
    companyCode: string
  ): Promise<LayoutData | null> {
    console.log(`=== 레이아웃 로드 시작 ===`);
    console.log(`화면 ID: ${screenId}`);

    // 권한 확인
    const existingScreen = await prisma.screen_definitions.findUnique({
      where: { screen_id: screenId },
    });

    if (!existingScreen) {
      return null;
    }

    if (companyCode !== "*" && existingScreen.company_code !== companyCode) {
      throw new Error("이 화면의 레이아웃을 조회할 권한이 없습니다.");
    }

    const layouts = await prisma.screen_layouts.findMany({
      where: { screen_id: screenId },
      orderBy: { display_order: "asc" },
    });

    console.log(`DB에서 조회된 레이아웃 수: ${layouts.length}`);

    if (layouts.length === 0) {
      return {
        components: [],
        gridSettings: { columns: 12, gap: 16, padding: 16 },
      };
    }

    const components: ComponentData[] = layouts.map((layout) => {
      const properties = layout.properties as any;
      const component = {
        id: layout.component_id,
        type: layout.component_type as any,
        position: {
          x: layout.position_x,
          y: layout.position_y,
          z: properties?.position?.z || 1, // z 값 복원
        },
        size: { width: layout.width, height: layout.height },
        parentId: layout.parent_id,
        ...properties,
      };

      console.log(`로드된 컴포넌트:`, {
        id: component.id,
        type: component.type,
        position: component.position,
        size: component.size,
        parentId: component.parentId,
        title: (component as any).title,
      });

      return component;
    });

    console.log(`=== 레이아웃 로드 완료 ===`);
    console.log(`반환할 컴포넌트 수: ${components.length}`);

    return {
      components,
      gridSettings: { columns: 12, gap: 16, padding: 16 },
    };
  }

  // ========================================
  // 템플릿 관리
  // ========================================

  /**
   * 템플릿 목록 조회 (회사별)
   */
  async getTemplatesByCompany(
    companyCode: string,
    type?: string,
    isPublic?: boolean
  ): Promise<ScreenTemplate[]> {
    const whereClause: any = {};

    if (companyCode !== "*") {
      whereClause.company_code = companyCode;
    }

    if (type) {
      whereClause.template_type = type;
    }

    if (isPublic !== undefined) {
      whereClause.is_public = isPublic;
    }

    const templates = await prisma.screen_templates.findMany({
      where: whereClause,
      orderBy: { created_date: "desc" },
    });

    return templates.map(this.mapToScreenTemplate);
  }

  /**
   * 템플릿 생성
   */
  async createTemplate(
    templateData: Partial<ScreenTemplate>
  ): Promise<ScreenTemplate> {
    const template = await prisma.screen_templates.create({
      data: {
        template_name: templateData.templateName!,
        template_type: templateData.templateType!,
        company_code: templateData.companyCode!,
        description: templateData.description,
        layout_data: templateData.layoutData
          ? JSON.parse(JSON.stringify(templateData.layoutData))
          : null,
        is_public: templateData.isPublic || false,
        created_by: templateData.createdBy,
      },
    });

    return this.mapToScreenTemplate(template);
  }

  // ========================================
  // 메뉴 할당 관리
  // ========================================

  /**
   * 화면-메뉴 할당
   */
  async assignScreenToMenu(
    screenId: number,
    assignmentData: MenuAssignmentRequest
  ): Promise<void> {
    // 중복 할당 방지
    const existingAssignment = await prisma.screen_menu_assignments.findFirst({
      where: {
        screen_id: screenId,
        menu_objid: assignmentData.menuObjid,
        company_code: assignmentData.companyCode,
      },
    });

    if (existingAssignment) {
      throw new Error("이미 할당된 화면입니다.");
    }

    await prisma.screen_menu_assignments.create({
      data: {
        screen_id: screenId,
        menu_objid: assignmentData.menuObjid,
        company_code: assignmentData.companyCode,
        display_order: assignmentData.displayOrder || 0,
        created_by: assignmentData.createdBy,
      },
    });
  }

  /**
   * 메뉴별 화면 목록 조회
   */
  async getScreensByMenu(
    menuObjid: number,
    companyCode: string
  ): Promise<ScreenDefinition[]> {
    const assignments = await prisma.screen_menu_assignments.findMany({
      where: {
        menu_objid: menuObjid,
        company_code: companyCode,
        is_active: "Y",
      },
      include: {
        screen: true,
      },
      orderBy: { display_order: "asc" },
    });

    return assignments.map((assignment) =>
      this.mapToScreenDefinition(assignment.screen)
    );
  }

  /**
   * 화면-메뉴 할당 해제
   */
  async unassignScreenFromMenu(
    screenId: number,
    menuObjid: number,
    companyCode: string
  ): Promise<void> {
    await prisma.screen_menu_assignments.deleteMany({
      where: {
        screen_id: screenId,
        menu_objid: menuObjid,
        company_code: companyCode,
      },
    });
  }

  // ========================================
  // 테이블 타입 연계
  // ========================================

  /**
   * 컬럼 정보 조회 (웹 타입 포함)
   */
  async getColumnInfo(tableName: string): Promise<ColumnInfo[]> {
    const columns = await prisma.$queryRaw`
      SELECT 
        c.column_name,
        COALESCE(cl.column_label, c.column_name) as column_label,
        c.data_type,
        COALESCE(cl.web_type, 'text') as web_type,
        c.is_nullable,
        c.column_default,
        c.character_maximum_length,
        c.numeric_precision,
        c.numeric_scale,
        cl.detail_settings,
        cl.code_category,
        cl.reference_table,
        cl.reference_column,
        cl.is_visible,
        cl.display_order,
        cl.description
      FROM information_schema.columns c
      LEFT JOIN column_labels cl ON c.table_name = cl.table_name 
        AND c.column_name = cl.column_name
      WHERE c.table_name = ${tableName}
      ORDER BY COALESCE(cl.display_order, c.ordinal_position)
    `;

    return columns as ColumnInfo[];
  }

  /**
   * 웹 타입 설정
   */
  async setColumnWebType(
    tableName: string,
    columnName: string,
    webType: WebType,
    additionalSettings?: Partial<ColumnWebTypeSetting>
  ): Promise<void> {
    await prisma.column_labels.upsert({
      where: {
        table_name_column_name: {
          table_name: tableName,
          column_name: columnName,
        },
      },
      update: {
        web_type: webType,
        column_label: additionalSettings?.columnLabel,
        detail_settings: additionalSettings?.detailSettings
          ? JSON.stringify(additionalSettings.detailSettings)
          : null,
        code_category: additionalSettings?.codeCategory,
        reference_table: additionalSettings?.referenceTable,
        reference_column: additionalSettings?.referenceColumn,
        is_visible: additionalSettings?.isVisible ?? true,
        display_order: additionalSettings?.displayOrder ?? 0,
        description: additionalSettings?.description,
        updated_date: new Date(),
      },
      create: {
        table_name: tableName,
        column_name: columnName,
        column_label: additionalSettings?.columnLabel,
        web_type: webType,
        detail_settings: additionalSettings?.detailSettings
          ? JSON.stringify(additionalSettings.detailSettings)
          : null,
        code_category: additionalSettings?.codeCategory,
        reference_table: additionalSettings?.referenceTable,
        reference_column: additionalSettings?.referenceColumn,
        is_visible: additionalSettings?.isVisible ?? true,
        display_order: additionalSettings?.displayOrder ?? 0,
        description: additionalSettings?.description,
        created_date: new Date(),
      },
    });
  }

  /**
   * 웹 타입별 위젯 생성
   */
  generateWidgetFromColumn(column: ColumnInfo): WidgetData {
    const baseWidget = {
      id: generateId(),
      tableName: column.tableName,
      columnName: column.columnName,
      type: column.webType || "text",
      label: column.columnLabel || column.columnName,
      required: column.isNullable === "N",
      readonly: false,
    };

    // detail_settings JSON 파싱
    const detailSettings = column.detailSettings
      ? JSON.parse(column.detailSettings)
      : {};

    switch (column.webType) {
      case "text":
        return {
          ...baseWidget,
          maxLength: detailSettings.maxLength || column.characterMaximumLength,
          placeholder: `Enter ${column.columnLabel || column.columnName}`,
          pattern: detailSettings.pattern,
        };

      case "number":
        return {
          ...baseWidget,
          min: detailSettings.min,
          max:
            detailSettings.max ||
            (column.numericPrecision
              ? Math.pow(10, column.numericPrecision) - 1
              : undefined),
          step:
            detailSettings.step ||
            (column.numericScale && column.numericScale > 0
              ? Math.pow(10, -column.numericScale)
              : 1),
        };

      case "date":
        return {
          ...baseWidget,
          format: detailSettings.format || "YYYY-MM-DD",
          minDate: detailSettings.minDate,
          maxDate: detailSettings.maxDate,
        };

      case "code":
        return {
          ...baseWidget,
          codeCategory: column.codeCategory,
          multiple: detailSettings.multiple || false,
          searchable: detailSettings.searchable || false,
        };

      case "entity":
        return {
          ...baseWidget,
          referenceTable: column.referenceTable,
          referenceColumn: column.referenceColumn,
          searchable: detailSettings.searchable || true,
          multiple: detailSettings.multiple || false,
        };

      case "textarea":
        return {
          ...baseWidget,
          rows: detailSettings.rows || 3,
          maxLength: detailSettings.maxLength || column.characterMaximumLength,
        };

      case "select":
        return {
          ...baseWidget,
          options: detailSettings.options || [],
          multiple: detailSettings.multiple || false,
          searchable: detailSettings.searchable || false,
        };

      case "checkbox":
        return {
          ...baseWidget,
          defaultChecked: detailSettings.defaultChecked || false,
          label: detailSettings.label || column.columnLabel,
        };

      case "radio":
        return {
          ...baseWidget,
          options: detailSettings.options || [],
          inline: detailSettings.inline || false,
        };

      case "file":
        return {
          ...baseWidget,
          accept: detailSettings.accept || "*/*",
          maxSize: detailSettings.maxSize || 10485760, // 10MB
          multiple: detailSettings.multiple || false,
        };

      default:
        return {
          ...baseWidget,
          type: "text",
        };
    }
  }

  // ========================================
  // 유틸리티 메서드
  // ========================================

  private mapToScreenDefinition(data: any): ScreenDefinition {
    return {
      screenId: data.screen_id,
      screenName: data.screen_name,
      screenCode: data.screen_code,
      tableName: data.table_name,
      companyCode: data.company_code,
      description: data.description,
      isActive: data.is_active,
      createdDate: data.created_date,
      createdBy: data.created_by,
      updatedDate: data.updated_date,
      updatedBy: data.updated_by,
    };
  }

  private mapToScreenTemplate(data: any): ScreenTemplate {
    return {
      templateId: data.template_id,
      templateName: data.template_name,
      templateType: data.template_type,
      companyCode: data.company_code,
      description: data.description,
      layoutData: data.layout_data,
      isPublic: data.is_public,
      createdBy: data.created_by,
      createdDate: data.created_date,
    };
  }

  /**
   * 화면 코드 자동 생성 (회사코드 + '_' + 순번)
   */
  async generateScreenCode(companyCode: string): Promise<string> {
    // 해당 회사의 기존 화면 코드들 조회
    const existingScreens = await prisma.screen_definitions.findMany({
      where: {
        company_code: companyCode,
        screen_code: {
          startsWith: companyCode,
        },
      },
      select: { screen_code: true },
      orderBy: { screen_code: "desc" },
    });

    // 회사 코드 뒤의 숫자 부분 추출하여 최대값 찾기
    let maxNumber = 0;
    const pattern = new RegExp(
      `^${companyCode.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")}(?:_)?(\\d+)$`
    );

    for (const screen of existingScreens) {
      const match = screen.screen_code.match(pattern);
      if (match) {
        const number = parseInt(match[1], 10);
        if (number > maxNumber) {
          maxNumber = number;
        }
      }
    }

    // 다음 순번으로 화면 코드 생성 (3자리 패딩)
    const nextNumber = maxNumber + 1;
    const paddedNumber = nextNumber.toString().padStart(3, "0");

    return `${companyCode}_${paddedNumber}`;
  }
}

// 서비스 인스턴스 export
export const screenManagementService = new ScreenManagementService();