export type InstructorCourse = {
  id: string;
  slug: string;
  title: string;
  subtitle?: string | null;
  description?: string | null;
  organizationName: string;
  teacher?: {
    id: string;
    name?: string | null;
    email: string;
  };
};

const LMS_API_BASE_URL = (import.meta.env.VITE_API_BASE_URL ?? 'https://workspace.autonomystudio.net/lms-api/api').replace(/\/+$/, '');

export async function listInstructorCourses(accessToken: string): Promise<{ courses: InstructorCourse[] }> {
  const response = await fetch(`${LMS_API_BASE_URL}/instructor/courses`, {
    headers: {
      Authorization: `Bearer ${accessToken}`,
    },
  });

  if (!response.ok) throw new Error(`강좌 목록을 불러오지 못했습니다. (${response.status})`);
  return response.json() as Promise<{ courses: InstructorCourse[] }>;
}

export async function createInitialInstructorCourse(accessToken: string, title: string): Promise<{ course: InstructorCourse }> {
  const response = await fetch(`${LMS_API_BASE_URL}/instructor/courses/initial`, {
    method: 'POST',
    headers: {
      Authorization: `Bearer ${accessToken}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({ title }),
  });

  if (!response.ok) {
    const payload = await response.json().catch(() => null) as { message?: string } | null;
    throw new Error(payload?.message || `강좌를 생성하지 못했습니다. (${response.status})`);
  }
  return response.json() as Promise<{ course: InstructorCourse }>;
}