#!/usr/bin/env node
/**
 * Seed script for micro-learning courses.
 * Reads prisma/seed-learn.json and creates courses/modules in the database.
 *
 * Run:
 *   npx prisma db push
 *   node prisma/seed-learn.js
 */

const { PrismaClient } = require('@prisma/client');
const fs = require('fs');
const path = require('path');

const prisma = new PrismaClient();

async function main() {
  const seedPath = path.join(__dirname, 'seed-learn.json');
  const raw = fs.readFileSync(seedPath, 'utf-8');
  const data = JSON.parse(raw);

  console.log(`Seeding ${data.courses.length} course(s)...`);

  for (const course of data.courses) {
    const { modules, ...courseData } = course;

    // Upsert course (match by slug)
    const upserted = await prisma.course.upsert({
      where: { slug: courseData.slug },
      update: {
        title: courseData.title,
        description: courseData.description,
        difficulty: courseData.difficulty,
        imageUrl: courseData.imageUrl,
      },
      create: {
        slug: courseData.slug,
        title: courseData.title,
        description: courseData.description,
        difficulty: courseData.difficulty,
        imageUrl: courseData.imageUrl,
      },
    });

    console.log(`  Course: ${upserted.title} (${upserted.id})`);

    // Delete old modules (clean re-seed for dev)
    await prisma.module.deleteMany({ where: { courseId: upserted.id } });

    // Create modules — strip id/courseId since Prisma auto-generates them
    if (modules && modules.length > 0) {
      await prisma.module.createMany({
        data: modules.map(({ id: _id, courseId: _cid, ...m }) => ({
          ...m,
          courseId: upserted.id,
          quizData:
            typeof m.quizData === 'string'
              ? m.quizData
              : JSON.stringify(m.quizData || []),
        })),
      });
      console.log(`    → ${modules.length} module(s) created`);
    }
  }

  console.log('Seeding complete.');
}

main()
  .catch((e) => {
    console.error(e);
    process.exit(1);
  })
  .finally(async () => {
    await prisma.$disconnect();
  });