import { mockCourses } from "@/lib/data/mockCourses";
import { getTeacherCourseBySlug, getTeacherCourses } from "@/lib/data/teacherCourses";
import type { Course } from "@/types/course";

const isPublished = (course: Course) => course.status === "Published";

export const getAllCourses = (): Course[] => {
  const teacherCourses = getTeacherCourses().filter(isPublished);
  if (teacherCourses.length === 0) return mockCourses.filter(isPublished);

  const teacherSlugs = new Set(teacherCourses.map((course) => course.slug));
  const baseCourses = mockCourses.filter((course) => isPublished(course) && !teacherSlugs.has(course.slug));
  return [...baseCourses, ...teacherCourses];
};

export const getCourseBySlug = (slug: string): Course | undefined => {
  const teacher = getTeacherCourseBySlug(slug);
  if (teacher) return teacher;
  return mockCourses.find((course) => course.slug === slug);
};

export const getAllCourseSlugs = (): string[] => {
  const teacherCourses = getTeacherCourses();
  const all = [...mockCourses, ...teacherCourses];
  return all.map((course) => course.slug);
};