/**
 * 一次性脚本：按新 6 色池（品牌蓝 + 多邻国绿/紫/红/黄/橙）重算并更新所有课程的 theme_color
 * 使用：npx ts-node scripts/backfill-theme-colors.ts
 */

import { PrismaClient } from '@prisma/client';
import { generateThemeColor } from '../src/utils/courseTheme';

const prisma = new PrismaClient();

async function main() {
  const courses = await prisma.course.findMany({
    select: { id: true },
    where: { deletedAt: null },
  });

  if (courses.length === 0) {
    console.log('[BackfillThemeColors] 没有课程，跳过');
    return;
  }

  console.log(`[BackfillThemeColors] 共 ${courses.length} 门课程，开始按 courseId 哈希重算 theme_color...`);

  let updated = 0;
  for (const c of courses) {
    const themeColor = generateThemeColor(c.id);
    await prisma.course.update({
      where: { id: c.id },
      data: { themeColor },
    });
    updated++;
  }

  console.log(`[BackfillThemeColors] 已更新 ${updated} 门课程的 theme_color（6 色池：品牌蓝 + 多邻国绿/紫/红/黄/橙）`);
}

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