'use server';

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

import { auth, authEmail } from '@/auth';
import { ChatEntity, MessageBase } from '@/lib/types';
import { notFound, redirect } from 'next/navigation';
import { nanoid } from '../utils';

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

  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()) as ChatEntity[];

    return results.sort((r1, r2) => r2.updatedAt - r1.updatedAt);
  } catch (error) {
    return [];
  }
}

export async function adminGetAllKVChats() {
  const { isAdmin } = await authEmail();

  if (!isAdmin) {
    notFound();
  }

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

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

    const results = (await pipeline.exec()) as ChatEntity[];

    return results.sort((r1, r2) => r2.updatedAt - r1.updatedAt);
  } catch (error) {
    return [];
  }
}

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

  if (!chat) {
    redirect('/');
  }

  return chat;
}

export async function createKVChat(chat: ChatEntity) {
  // const { email, isAdmin } = await authEmail();
  const { email } = await authEmail();

  await kv.hmset(`chat:${chat.id}`, chat);
  if (email) {
    await kv.zadd(`user:chat:${email}`, {
      score: Date.now(),
      member: `chat:${chat.id}`,
    });
  }
  await kv.zadd('user:chat:all', {
    score: Date.now(),
    member: `chat:${chat.id}`,
  });
  revalidatePath('/chat', 'layout');
}

export async function saveKVChatMessage(id: string, message: MessageBase) {
  const chat = await kv.hgetall<ChatEntity>(`chat:${id}`);
  if (!chat) {
    notFound();
  }
  const { messages } = chat;
  await kv.hmset(`chat:${id}`, {
    ...chat,
    messages: [...messages, message],
    updatedAt: Date.now(),
  });
  revalidatePath('/chat', 'layout');
}

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('/chat/layout', 'layout');
  return revalidatePath(path);
}