import { db } from "../../db/index";
import { courses, topics, userProgress } from "../../db/schema";
import { eq, and } from "drizzle-orm";

export default defineEventHandler(async () => {
  const allCourses = await db.query.courses.findMany({
    orderBy: (c, { desc }) => desc(c.createdAt),
  });

  const result = [];

  for (const course of allCourses) {
    const topicRows = await db.query.topics.findMany({
      where: eq(topics.courseId, course.id),
    });

    const topicCount = topicRows.length;

    let completedCount = 0;
    if (topicCount > 0) {
      const progressRows = await db.query.userProgress.findMany({
        where: eq(userProgress.courseId, course.id),
      });
      completedCount = progressRows.filter((p) => p.lessonComplete).length;
    }

    result.push({
      ...course,
      topicCount,
      completedCount,
    });
  }

  return result;
});