'use server';

import { revalidatePath } from 'next/cache';
import { kv } from '@vercel/kv';

import { auth } from '@/auth';
import { ChatEntity } from '@/lib/types';
import { redirect } from 'next/navigation';

async function authCheck() {
  const session = await auth();
  const email = session?.user?.email;
  if (!email) {
    redirect('/');
  }
  return { email, isAdmin: email.endsWith('landing.ai') };
}

export async function getKVChats() {
  const { email } = await authCheck();

  try {
    const pipeline = kv.pipeline();
    const chats: string[] = await kv.zrange(`user:chat:${email}`, 0, -1, {
      rev: true,
    });

    for (const chat of chats) {
      pipeline.hgetall(chat);
    }

    const results = await pipeline.exec();

    return results as ChatEntity[];
  } catch (error) {
    return [];
  }
}

export async function getKVChat(id: string) {
  const { email, isAdmin } = await authCheck();
  const chat = await kv.hgetall<ChatEntity>(`chat:${id}`);

  if (chat?.user !== email || !isAdmin) {
    redirect('/');
  }

  return chat;
}

export async function removeKVChat({ id, path }: { id: string; path: string }) {
  const session = await auth();

  if (!session) {
    return {
      error: 'Unauthorized',
    };
  }

  //Convert uid to string for consistent comparison with session.user.id
  const uid = String(await kv.hget(`chat:${id}`, 'userId'));

  if (uid !== session?.user?.id) {
    return {
      error: 'Unauthorized',
    };
  }

  await kv.del(`chat:${id}`);
  await kv.zrem(`user:chat:${session.user.id}`, `chat:${id}`);

  revalidatePath('/');
  return revalidatePath(path);
}