import { z } from 'zod';
import type { CourseDBInterface } from '@vue-skuilder/db';
import type { CourseResource } from '../types/resources.js';

export async function handleCourseConfigResource(
  courseDB: CourseDBInterface
): Promise<CourseResource> {
  try {
    // Get course configuration
    const config = await courseDB.getCourseConfig();
    
    // TODO: Implement proper ELO distribution calculation
    // For now, provide basic structure
    const eloStats = {
      min: 1000,
      max: 2000,
      mean: 1500,
      distribution: [100, 200, 300, 250, 150] // Placeholder histogram
    };

    return {
      config,
      eloStats
    };
  } catch (error) {
    throw new Error(`Failed to load course config: ${error instanceof Error ? error.message : 'Unknown error'}`);
  }
}

// URI pattern validation
export const CourseConfigUriSchema = z.string().regex(/^course:\/\/config$/);
export type CourseConfigUri = z.infer<typeof CourseConfigUriSchema>;