import { z } from "zod";
import { dbGlobal } from "drizzle-pkg/lib/db";
import { items, itemTags, tags } from "drizzle-pkg/lib/schema/collection";
import { eq, and, like, or as orOp } from "drizzle-orm";
import { getContextUser } from "#server/utils/context";

export default defineWrappedResponseHandler({ auth: "required" }, async (event) => {
  const user = getContextUser(event)!;
  const body = await readBody(event);
  const parsed = z.object({
    message: z.string().min(1),
  }).safeParse(body);
  if (!parsed.success) return R.error("请输入问题", parsed.error.issues);

  const { message } = parsed.data;

  // Search items matching the query
  const keywords = message.split(/\s+/).filter(k => k.length > 0);
  if (keywords.length === 0) return R.success({ answer: "请问有什么可以帮助你的？", items: [] });

  const conditions = keywords.map(k =>
    orOp(
      like(items.title, `%${k}%`),
      like(items.description, `%${k}%`),
      like(items.content, `%${k}%`)
    )
  );

  const matched = await dbGlobal
    .select()
    .from(items)
    .where(and(eq(items.userId, user.id), conditions[0]));

  if (matched.length === 0) {
    return R.success({
      answer: `没有找到与"${message}"相关的收藏。试试其他关键词？`,
      items: [],
    });
  }

  // Build a conversational response
  const previews = matched.slice(0, 3).map(item =>
    `- **${item.title}**${item.description ? `：${item.description.slice(0, 60)}` : ''}`
  ).join("\n");

  const answer = `找到 ${matched.length} 条相关收藏：\n${previews}\n\n${matched.length > 3 ? `以及其他 ${matched.length - 3} 条...` : ''}`;

  return R.success({ answer, items: matched.slice(0, 5) });
});