"server-only";

import { genSaltSync, hashSync } from "bcrypt-ts";
import { and, asc, desc, eq, gt } from "drizzle-orm";
import { drizzle } from "drizzle-orm/postgres-js";
import postgres from "postgres";

import { user, chat, User, document, Suggestion } from "./schema";

// Optionally, if not using email/pass login, you can
// use the Drizzle adapter for Auth.js / NextAuth
// https://authjs.dev/reference/adapter/drizzle
let client = postgres(`${process.env.POSTGRES_URL!}?sslmode=require`);
let db = drizzle(client);

export async function getUser(email: string): Promise<Array<User>> {
  try {
    return await db.select().from(user).where(eq(user.email, email));
  } catch (error) {
    console.error("Failed to get user from database");
    throw error;
  }
}

export async function createUser(email: string, password: string) {
  let salt = genSaltSync(10);
  let hash = hashSync(password, salt);

  try {
    return await db.insert(user).values({ email, password: hash });
  } catch (error) {
    console.error("Failed to create user in database");
    throw error;
  }
}

export async function saveChat({
  id,
  messages,
  userId,
}: {
  id: string;
  messages: any;
  userId: string;
}) {
  try {
    const selectedChats = await db.select().from(chat).where(eq(chat.id, id));

    if (selectedChats.length > 0) {
      return await db
        .update(chat)
        .set({
          messages: JSON.stringify(messages),
        })
        .where(eq(chat.id, id));
    }

    return await db.insert(chat).values({
      id,
      createdAt: new Date(),
      messages: JSON.stringify(messages),
      userId,
    });
  } catch (error) {
    console.error("Failed to save chat in database");
    throw error;
  }
}

export async function deleteChatById({ id }: { id: string }) {
  try {
    return await db.delete(chat).where(eq(chat.id, id));
  } catch (error) {
    console.error("Failed to delete chat by id from database");
    throw error;
  }
}

export async function getChatsByUserId({ id }: { id: string }) {
  try {
    return await db
      .select()
      .from(chat)
      .where(eq(chat.userId, id))
      .orderBy(desc(chat.createdAt));
  } catch (error) {
    console.error("Failed to get chats by user from database");
    throw error;
  }
}

export async function getChatById({ id }: { id: string }) {
  try {
    const [selectedChat] = await db.select().from(chat).where(eq(chat.id, id));
    return selectedChat;
  } catch (error) {
    console.error("Failed to get chat by id from database");
    throw error;
  }
}

export async function saveDocument({
  id,
  title,
  content,
  userId,
}: {
  id: string;
  title: string;
  content: string;
  userId: string;
}) {
  try {
    return await db.insert(document).values({
      id,
      title,
      content,
      userId,
      createdAt: new Date(),
    });
  } catch (error) {
    console.error("Failed to save document in database");
    throw error;
  }
}

export async function getDocumentsById({ id }: { id: string }) {
  try {
    const documents = await db
      .select()
      .from(document)
      .where(eq(document.id, id))
      .orderBy(asc(document.createdAt));

    return documents;
  } catch (error) {
    console.error("Failed to get document by id from database");
    throw error;
  }
}

export async function getDocumentById({ id }: { id: string }) {
  try {
    const [selectedDocument] = await db
      .select()
      .from(document)
      .where(eq(document.id, id))
      .orderBy(desc(document.createdAt));

    return selectedDocument;
  } catch (error) {
    console.error("Failed to get document by id from database");
    throw error;
  }
}

export async function deleteDocumentsByIdAfterTimestamp({
  id,
  timestamp,
}: {
  id: string;
  timestamp: Date;
}) {
  try {
    return await db
      .delete(document)
      .where(and(eq(document.id, id), gt(document.createdAt, timestamp)));
  } catch (error) {
    console.error(
      "Failed to delete documents by id after timestamp from database",
    );
    throw error;
  }
}

export async function saveSuggestions({
  suggestions,
}: {
  suggestions: Array<Suggestion>;
}) {
  try {
    return await db.insert(Suggestion).values(suggestions);
  } catch (error) {
    console.error("Failed to save suggestions in database");
    throw error;
  }
}

export async function getSuggestionsByDocumentId({
  documentId,
}: {
  documentId: string;
}) {
  try {
    return await db
      .select()
      .from(Suggestion)
      .where(and(eq(Suggestion.documentId, documentId)));
  } catch (error) {
    console.error(
      "Failed to get suggestions by document version from database",
    );
    throw error;
  }
}