import { desc, eq, like, or } from "drizzle-orm";
import { NextRequest, NextResponse } from "next/server";
import { getDb } from "@/db";
import { jobs, organizations, posts, users } from "@/db/schema";
import { apiResponseError, parseLimit } from "@/lib/api";

export async function GET(request: NextRequest) {
  try {
    const q = request.nextUrl.searchParams.get("q")?.trim();
    const limit = parseLimit(request.nextUrl.searchParams.get("limit"), 10, 25);
    if (!q) return NextResponse.json({ people: [], jobs: [], companies: [], posts: [] });
    const pattern = `%${q}%`;
    const db = getDb();
    const [people, jobRows, companies, postRows] = await Promise.all([
      db.select({ id: users.id, name: users.name, username: users.username, headline: users.headline, avatarUrl: users.avatarUrl }).from(users)
        .where(or(like(users.name, pattern), like(users.headline, pattern), like(users.location, pattern))).limit(limit),
      db.select({ job: jobs, company: organizations }).from(jobs).innerJoin(organizations, eq(organizations.id, jobs.organizationId))
        .where(or(like(jobs.title, pattern), like(organizations.name, pattern), like(jobs.description, pattern))).limit(limit),
      db.select().from(organizations).where(or(like(organizations.name, pattern), like(organizations.industry, pattern), like(organizations.description, pattern))).limit(limit),
      db.select({ post: posts, author: { id: users.id, name: users.name, username: users.username, avatarUrl: users.avatarUrl } }).from(posts).innerJoin(users, eq(users.id, posts.authorId))
        .where(like(posts.content, pattern)).orderBy(desc(posts.createdAt)).limit(limit),
    ]);
    return NextResponse.json({ people, jobs: jobRows, companies, posts: postRows });
  } catch (error) {
    return apiResponseError(error);
  }
}