import * as fs from 'fs';
import * as path from 'path';
import { uatConfig } from '../config/uat-config';

export interface TestData {
  users: any[];
  roles: any[];
  scenarios: any;
}

export class DataLoader {
  private static data: TestData | null = null;

  static load(): TestData {
    if (!this.data) {
      const usersPath = path.join(uatConfig.testDataPath, 'users.json');
      const rolesPath = path.join(uatConfig.testDataPath, 'roles.json');
      const scenariosPath = path.join(uatConfig.testDataPath, 'scenarios.json');

      this.data = {
        users: JSON.parse(fs.readFileSync(usersPath, 'utf-8')),
        roles: JSON.parse(fs.readFileSync(rolesPath, 'utf-8')),
        scenarios: JSON.parse(fs.readFileSync(scenariosPath, 'utf-8'))
      };
    }
    return this.data;
  }

  static getUserByRole(role: string): any {
    const data = this.load();
    if (Array.isArray(data.users)) {
      return data.users.find((user: any) => user.role === role || user.username === role) || null;
    } else {
      return data.users[role] || null;
    }
  }

  static getUsersByScenario(scenarioName: string): any[] {
    const data = this.load();
    const scenario = data.scenarios[scenarioName];
    return scenario?.users || [];
  }

  static reset() {
    this.data = null;
  }
}