/**
 * System Function Service
 * 系統功能列表服務
 */

const API_BASE_URL = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:10181';

export interface SystemFunctionNode {
  id: number;
  code: string;
  name: string;
  function_type: number; // 1=NODE, 2=FUNCTION
  order: number;
  function_icon: string;
  module_code: string | null;
  module_functions: string[]; // ["View", "Create", "Read", "Update", "Delete"]
  description: string;
  children: SystemFunctionNode[];
}

export const systemFunctionService = {
  /**
   * 取得功能列表樹狀結構
   * @param isSysmana 是否為系統管理公司
   * @returns Promise<SystemFunctionNode[]>
   */
  async getMenuTree(isSysmana: boolean = false): Promise<SystemFunctionNode[]> {
    try {
      const url = `${API_BASE_URL}/api/v1/system-functions/menu/tree?is_sysmana=${isSysmana}`;
      console.log('[SystemFunctionService] Fetching menu tree:', url);
      console.log('[SystemFunctionService] is_sysmana parameter:', isSysmana);

      const response = await fetch(url, {
        method: 'GET',
        headers: {
          'Content-Type': 'application/json',
        },
        credentials: 'include', // 包含 cookies (用於認證)
      });

      if (!response.ok) {
        throw new Error(`Failed to fetch menu tree: ${response.statusText}`);
      }

      const data = await response.json();
      console.log('[SystemFunctionService] Received menu items:', data.length);
      console.log('[SystemFunctionService] Menu data:', data);
      return data;
    } catch (error) {
      console.error('Error fetching menu tree:', error);
      throw error;
    }
  },

  /**
   * 將 code 轉換為路由路徑
   * @param code 功能代碼 (例如: tenant_departments)
   * @returns 路由路徑 (例如: /tenant-departments)
   */
  codeToRoute(code: string): string {
    return `/${code.replace(/_/g, '-')}`;
  },

  /**
   * 檢查功能是否有特定操作權限
   * @param moduleFunctions 功能操作列表
   * @param operation 操作名稱 (View, Create, Read, Update, Delete)
   * @returns boolean
   */
  hasOperation(moduleFunctions: string[], operation: string): boolean {
    return moduleFunctions.includes(operation);
  },
};