import express, { Request, Response } from "express";
import cors from "cors";
import bodyParser from "body-parser";
import { logger } from "./utils/logger.js";

import {
  workerInbox,
  workerPrepareSendPost,
  workerGetUser,
  workerSendPostChunk,
  workerProcessFirehose,
  workerDeletePost,
  workerProcessRemotePostView,
  workerProcessRemoteMediaData,
  workerGenerateUserKeyPair,
} from "./utils/workers.js";

import { SignedRequest } from "./interfaces/fediverse/signedRequest.js";
import { activityPubRoutes } from "./routes/activitypub/activitypub.js";
import { wellKnownRoutes } from "./routes/activitypub/well-known.js";
import adminRoutes from "./routes/admin.js";
import blockRoutes from "./routes/blocks.js";
import blockUserServerRoutes from "./routes/blockUserServer.js";
import dashboardRoutes from "./routes/dashboard.js";
import deletePost from "./routes/deletePost.js";
import emojiReactRoutes from "./routes/emojiReact.js";
import emojiRoutes from "./routes/emojis.js";
import followsRoutes from "./routes/follows.js";
import forumRoutes from "./routes/forum.js";
import { frontend } from "./routes/frontend.js";
import likeRoutes from "./routes/like.js";
import biteRoutes from "./routes/bite.js";
import listRoutes from "./routes/lists.js";
import mediaRoutes from "./routes/media.js";
import muteRoutes from "./routes/mute.js";
import { notificationRoutes } from "./routes/notifications.js";
import pollRoutes from "./routes/polls.js";
import postsRoutes from "./routes/posts.js";
import searchRoutes from "./routes/search.js";
import silencePostRoutes from "./routes/silencePost.js";
import statusRoutes from "./routes/status.js";
import { userRoutes } from "./routes/users.js";
import checkIpBlocked from "./utils/checkIpBlocked.js";
import overrideContentType from "./utils/overrideContentType.js";
import swagger from "swagger-ui-express";
import { readFile } from "fs/promises";
import { Worker } from "bullmq";
import expressWs from "express-ws";
import websocketRoutes from "./routes/websocket.js";
import { followHashtagRoutes } from "./routes/followHashtags.js";
import { completeEnvironment } from "./utils/backendOptions.js";
import cron from "node-cron";
import { nukeBannedUsers } from "./utils/maintenanceTasks/nukeBannedUsers.js";
import { sequelize } from "./models/sequelize.js";
import { Op, Sequelize } from "sequelize";
import { Post } from "./models/post.js";
import { User } from "./models/index.js";
import { follow } from "./utils/follow.js";
import { getAdminUser } from "./utils/getAdminAndDeletedUser.js";

const PORT = completeEnvironment.port;
const app = express();
const wsServer = expressWs(app);
const server = wsServer.app;
websocketRoutes(server);

cron.schedule("0 2 * * *", async () => {
  // maintenance tasks
  sequelize.query("VACUUM ANALYZE").then(() => {
    logger.info(`postgres vacuum analyze executed`);
  });
  nukeBannedUsers().then(() => {
    logger.info(`NukeBannedUsers Done`);
  });
});

server.listen(PORT, completeEnvironment.listenIp, () => {
  logger.info("started websocket");
});

const queryInterface = sequelize.getQueryInterface();

if (completeEnvironment.autoFollowAdmin) {
  try {
    const users = await User.findAll({
      where: {
        banned: {
          [Op.ne]: true,
        },
        email: {
          [Op.ne]: null,
        },
      },
    });
    const adminUser = await getAdminUser();
    await Promise.all(users.map((x) => follow(x.id, adminUser.id)));
  } catch {}
}
let postIndexes = await queryInterface.showIndex("posts");

if (
  !(postIndexes as Array<any>).some((index) => index.name === "post_bsky_uri")
) {
  logger.info(
    `ATTENTION: your server doesnt seem to have an unique index on bskyuri. this is a bug. we will investigate soon in a future release`
  );
  // clearDuplicatedBskyUris().then(async (res) => {
  //   // well turns out that we dont have indexes
  //   // we have cleaned duplicated before. if a duplicate apears here we just crash and do it again :3
  //   await queryInterface.sequelize.query(
  //     `CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS post_bsky_uri  ON "posts" ("bskyUri");`
  //   );
  // });
}

async function clearDuplicatedBskyUris(): Promise<boolean> {
  let duplicatedURIs: any = await queryInterface.sequelize.query(
    `SELECT "a"."id" FROM "posts" as "a" LEFT JOIN "posts" as "b" ON "a"."bskyUri" = "b"."bskyUri" WHERE "a"."bskyUri" IS NOT NULL AND "a"."id" != "b"."id" LIMIT 50`
  );
  while (duplicatedURIs[1].rowCount) {
    const postIds: string[] = duplicatedURIs[0].map((elem: any) => elem.id);
    for await (const postId of postIds) {
      const originalPost = await Post.findByPk(postId);
      if (originalPost && originalPost.bskyUri) {
        const duplicatePosts = await Post.findAll({
          where: {
            id: {
              [Op.ne]: postId,
            },
            bskyUri: originalPost.bskyUri,
          },
        });
        if (duplicatePosts && duplicatePosts.length > 0) {
          // TIME TO CLEAN.
          const duplicatedPostIds = duplicatePosts.map((elem) => elem.id);
          await Post.update(
            {
              parentId: postId,
            },
            {
              where: {
                parentId: {
                  [Op.in]: duplicatedPostIds,
                },
              },
            }
          );
          await Post.destroy({
            where: {
              id: {
                [Op.in]: duplicatedPostIds,
              },
            },
          });
        }
      }
    }
    duplicatedURIs = await queryInterface.sequelize.query(
      `SELECT "a"."id" FROM "posts" as "a" LEFT JOIN "posts" as "b" ON "a"."bskyUri" = "b"."bskyUri" WHERE "a"."bskyUri" IS NOT NULL AND "a"."id" != "b"."id" LIMIT 50`
    );
  }

  return true;
}