import { Op, QueryTypes } from "sequelize";
import {
  Ask,
  Blocks,
  Emoji,
  EmojiReaction,
  FederatedHost,
  Media,
  Post,
  PostEmojiRelations,
  PostMentionsUserRelation,
  PostTag,
  QuestionPoll,
  QuestionPollAnswer,
  QuestionPollQuestion,
  Quotes,
  sequelize,
  ServerBlock,
  User,
  UserBookmarkedPosts,
  UserEmojiRelation,
  UserLikesPostRelations,
} from "../models/index.js";
import getPosstGroupDetails from "./getPostGroupDetails.js";
import getFollowedsIds from "./cacheGetters/getFollowedsIds.js";
import { Queue } from "bullmq";
import { completeEnvironment } from "./backendOptions.js";
import {
  InteractionControl,
  InteractionControlType,
  Privacy,
} from "../models/post.js";
import { getAllLocalUserIds } from "./cacheGetters/getAllLocalUserIds.js";
import { checkBskyLabelersNSFW } from "./atproto/checkBskyLabelerNSFW.js";
import { isAdult } from "./isAdult.js";
import { logger } from "./logger.js";

const updateMediaDataQueue = new Queue("processRemoteMediaData", {
  connection: completeEnvironment.bullmqConnection,
  defaultJobOptions: {
    removeOnComplete: true,
    attempts: 3,
    backoff: {
      type: "exponential",
      delay: 1000,
    },
    removeOnFail: true,
  },
});

async function getQuotes(postIds: string[]): Promise<Quotes[]> {
  return await Quotes.findAll({
    where: {
      quoterPostId: {
        [Op.in]: postIds,
      },
    },
  });
}

async function getMedias(postIds: string[]) {
  const medias = await Media.findAll({
    attributes: [
      "id",
      "NSFW",
      "description",
      "url",
      "external",
      "mediaOrder",
      "mediaType",
      "postId",
      "blurhash",
      "width",
      "height",
    ],
    where: {
      postId: {
        [Op.in]: postIds,
      },
    },
  });

  let mediasToProcess = medias.filter(
    (elem: any) =>
      !elem.mediaType || (elem.mediaType?.startsWith("image") && !elem.width)
  );
  if (mediasToProcess && mediasToProcess.length > 0) {
    updateMediaDataQueue.addBulk(
      mediasToProcess.map((media: any) => {
        return {
          name: `getMediaData${media.id}`,
          data: { mediaId: media.id },
        };
      })
    );
  }
  return medias;
}
async function getMentionedUserIds(
  postIds: string[]
): Promise<{ usersMentioned: string[]; postMentionRelation: any[] }> {
  const mentions = await PostMentionsUserRelation.findAll({
    attributes: ["userId", "postId"],
    where: {
      postId: {
        [Op.in]: postIds,
      },
    },
  });
  const usersMentioned = mentions.map((elem: any) => elem.userId);
  const postMentionRelation = mentions.map((elem: any) => {
    return { userMentioned: elem.userId, post: elem.postId };
  });
  return { usersMentioned, postMentionRelation };
}

async function getTags(postIds: string[]) {
  return await PostTag.findAll({
    attributes: ["postId", "tagName"],
    where: {
      postId: {
        [Op.in]: postIds,
      },
    },
  });
}

async function getLikes(postIds: string[]) {
  return await UserLikesPostRelations.findAll({
    attributes: ["userId", "postId"],
    where: {
      postId: {
        [Op.in]: postIds,
      },
    },
  });
}

async function getBookmarks(postIds: string[], userId: string) {
  return await UserBookmarkedPosts.findAll({
    attributes: ["userId", "postId"],
    where: {
      userId: userId,
      postId: {
        [Op.in]: postIds,
      },
    },
  });
}

async function getEmojis(input: {
  userIds: string[];
  postIds: string[];
}): Promise<{
  userEmojiRelation: UserEmojiRelation[];
  postEmojiRelation: PostEmojiRelations[];
  postEmojiReactions: EmojiReaction[];
  emojis: Emoji[];
}> {
  let postEmojisIdsPromise = PostEmojiRelations.findAll({
    attributes: ["emojiId", "postId"],
    where: {
      postId: {
        [Op.in]: input.postIds,
      },
    },
  });

  let postEmojiReactionsPromise = EmojiReaction.findAll({
    attributes: ["emojiId", "postId", "userId", "content"],
    where: {
      postId: {
        [Op.in]: input.postIds,
      },
    },
  });

  let userEmojiIdPromise = UserEmojiRelation.findAll({
    attributes: ["emojiId", "userId"],
    where: {
      userId: {
        [Op.in]: input.userIds,
      },
    },
  });

  await Promise.all([
    postEmojisIdsPromise,
    userEmojiIdPromise,
    postEmojiReactionsPromise,
  ]);
  let postEmojisIds = await postEmojisIdsPromise;
  let userEmojiId = await userEmojiIdPromise;
  let postEmojiReactions = await postEmojiReactionsPromise;

  const emojiIds: string[] = ([] as string[])
    .concat(postEmojisIds.map((elem: any) => elem.emojiId))
    .concat(userEmojiId.map((elem: any) => elem.emojiId))
    .concat(postEmojiReactions.map((reaction: any) => reaction.emojiId));
  return {
    userEmojiRelation: userEmojiId,
    postEmojiRelation: postEmojisIds,
    postEmojiReactions: postEmojiReactions,
    emojis: await Emoji.findAll({
      attributes: ["id", "url", "external", "name", "uuid"],
      where: {
        id: {
          [Op.in]: emojiIds,
        },
      },
    }),
  };
}

// TODO optimization: make more promise all and less await dothing await dothing
async function getUnjointedPosts(
  postIdsInput: string[],
  posterId: string,
  doNotFullyHide = false
) {
  let user = await User.scope("full").findByPk(posterId);

  // we need a list of all the userId we just got from the post
  let userIds: string[] = [];
  let postIds: string[] = [];
  if (completeEnvironment.enableBsky) {
    // DETECT BSKY NSFW
    const bskyPosts = await Post.findAll({
      where: {
        id: {
          [Op.in]: postIdsInput,
        },
        userId: {
          [Op.notIn]: await getAllLocalUserIds(),
        },
        bskyUri: {
          [Op.ne]: null,
        },
      },
    });
    if (bskyPosts && bskyPosts.length) {
      await checkBskyLabelersNSFW(
        bskyPosts.filter((elem) => !elem.content_warning && elem.bskyUri)
      );
    }
    // END DETECT BSKY NSFW
  }
  const posts = await Post.findAll({
    include: [
      {
        model: Post,
        as: "ancestors",
        required: false,
        where: {
          isDeleted: false,
        },
      },
    ],
    where: {
      id: {
        [Op.in]: postIdsInput,
      },
      isDeleted: false,
    },
  });
  posts.forEach((post: any) => {
    userIds.push(post.userId);
    postIds.push(post.id);
    post.ancestors?.forEach((ancestor: any) => {
      userIds.push(ancestor.userId);
      postIds.push(ancestor.id);
    });
  });
  const quotes = await getQuotes(postIds);
  const quotedPostsIds = quotes.map((quote) => quote.quotedPostId);
  postIds = postIds.concat(quotedPostsIds);
  const quotedPosts = await Post.findAll({
    where: {
      id: {
        [Op.in]: quotedPostsIds,
      },
    },
  });
  const asks = await Ask.findAll({
    attributes: [
      "question",
      "apObject",
      "createdAt",
      "updatedAt",
      "postId",
      "userAsked",
      "userAsker",
    ],
    where: {
      postId: {
        [Op.in]: postIds,
      },
    },
  });

  const rewootedPosts = await Post.findAll({
    attributes: ["id", "parentId"],
    where: {
      isReblog: true,
      userId: posterId,
      parentId: {
        [Op.in]: postIds,
      },
    },
  });
  const rewootIds = rewootedPosts.map((r: any) => r.id);

  userIds = userIds
    .concat(quotedPosts.map((q: any) => q.userId))
    .concat(asks.map((elem: any) => elem.userAsked))
    .concat(asks.map((elem: any) => elem.userAsker));
  const emojis = getEmojis({
    userIds,
    postIds,
  });
  const mentions = await getMentionedUserIds(postIds);
  userIds = userIds.concat(mentions.usersMentioned);
  userIds = userIds.concat(
    (await emojis).postEmojiReactions.map((react: any) => react.userId)
  );
  const polls = QuestionPoll.findAll({
    where: {
      postId: {
        [Op.in]: postIds,
      },
    },
    include: [
      {
        model: QuestionPollQuestion,
        include: [
          {
            model: QuestionPollAnswer,
            required: false,
            where: {
              userId: posterId,
            },
          },
        ],
      },
    ],
  });

  let medias = getMedias([...postIds, ...rewootIds]);
  let tags = getTags([...postIds, ...rewootIds]);

  const likes = await getLikes(postIds);
  const bookmarks = await getBookmarks(postIds, posterId);
  userIds = userIds.concat(likes.map((like: any) => like.userId));
  const users = User.findAll({
    attributes: [
      "url",
      "avatar",
      "id",
      "name",
      "remoteId",
      "banned",
      "bskyDid",
      "federatedHostId",
      "isBot"
    ],
    where: {
      id: {
        [Op.in]: userIds,
      },
    },
  });
  const usersMap: Map<string, User> = new Map();
  for (const usr of await users) {
    usersMap.set(usr.id, usr);
  }
  const postWithNotes = getPosstGroupDetails(posts);
  await Promise.all([emojis, users, polls, medias, tags, postWithNotes]);
  const hostsIds = (await users)
    .filter((elem) => elem.federatedHostId)
    .map((elem) => elem.federatedHostId);
  const blockedHosts = await FederatedHost.findAll({
    where: {
      id: {
        [Op.in]: hostsIds as string[],
      },
      blocked: true,
    },
  });
  const blockedHostsIds = blockedHosts.map((elem) => elem.id);
  let blockedUsersSet: Set<string> = new Set();
  const blockedUsersQuery = await Blocks.findAll({
    where: {
      [Op.or]: [
        {
          blockerId: posterId,
        },
        {
          blockedId: posterId,
        },
      ],
    },
  });
  for (const block of blockedUsersQuery) {
    blockedUsersSet.add(block.blockedId);
    blockedUsersSet.add(block.blockerId);
  }
  blockedUsersSet.delete(posterId);
  const bannedUserIds = (await users)
    .filter(
      (elem) =>
        elem.banned ||
        (elem.federatedHostId && blockedHostsIds.includes(elem.federatedHostId))
    )
    .map((elem) => elem.id);
  let usersFollowedByPoster: string[] | Promise<string[]> =
    getFollowedsIds(posterId);
  let usersFollowingPoster: string[] | Promise<string[]> = getFollowedsIds(
    posterId,
    false,
    {
      getFollowersInstead: true,
    }
  );

  await Promise.all([
    usersFollowedByPoster,
    usersFollowingPoster,
    tags,
    medias,
  ]);
  usersFollowedByPoster = await usersFollowedByPoster;
  usersFollowingPoster = await usersFollowingPoster;
  const tagsAwaited = await tags;
  const mediasAwaited = await medias;

  const invalidRewoots = [] as string[];
  for (const id of rewootIds) {
    const hasMedia = mediasAwaited.some((media: any) => media.postId === id);
    const hasTags = tagsAwaited.some((tag: any) => tag.postId === id);
    if (hasMedia || hasTags) {
      invalidRewoots.push(id);
    }
  }

  const finalRewootIds = rewootedPosts
    .filter((r: any) => !invalidRewoots.includes(r.id))
    .map((r: any) => r.parentId);
  const blockedServers = (
    await ServerBlock.findAll({ where: { userBlockerId: posterId } })
  ).map((elem) => elem.blockedServerId);
  const postsMentioningUser: string[] = mentions.postMentionRelation
    .filter((mention: any) => mention.userMentioned === posterId)
    .map((mention: any) => mention.post);
  const allPosts = (await postWithNotes)
    .concat((await postWithNotes).flatMap((elem: any) => elem.ancestors))
    .concat(await quotedPosts)
    .map((elem: any) => (elem.dataValues ? elem.dataValues : elem));
  const postsToFullySend = allPosts.filter((post: any) => {
    const postIsPostedByUser = post.userId === posterId;
    const isReblog =
      post.content === "" &&
      !tagsAwaited.some((tag: any) => tag.postId === post.id) &&
      !mediasAwaited.some((media: any) => media.postId === post.id);
    const validPrivacy = [
      Privacy.Public,
      Privacy.LocalOnly,
      Privacy.Unlisted,
      Privacy.LinkOnly,
    ].includes(post.privacy);
    const userFollowsPoster =
      usersFollowedByPoster.includes(post.userId) &&
      post.privacy === Privacy.FollowersOnly;
    const userIsMentioned = postsMentioningUser.includes(post.id);
    const posterIsInBlockedServer = blockedServers.includes(
      usersMap.get(post.userId)?.federatedHostId as string
    );
    return (
      !bannedUserIds.includes(post.userId) &&
      !posterIsInBlockedServer &&
      (postIsPostedByUser ||
        validPrivacy ||
        userFollowsPoster ||
        userIsMentioned ||
        isReblog)
    );
  });
  const postIdsToFullySend: string[] = postsToFullySend
    .filter((elem) => !blockedUsersSet.has(elem.userId))
    .map((post: any) => post.id);
  const postsToSendFiltered = (await postWithNotes)
    .map((post: any) => filterPost(post, postIdsToFullySend, doNotFullyHide))
    .filter((elem: any) => !!elem);
  let mediasToSend = (await medias).filter((elem: any) => {
    return postIdsToFullySend.includes(elem.postId);
  });
  const tagsFiltered = (await tags).filter((tag: any) =>
    postIdsToFullySend.includes(tag.postId)
  );
  const quotesFiltered = quotes.filter((quote: any) =>
    postIdsToFullySend.includes(quote.quoterPostId)
  );
  const pollsFiltered = (await polls).filter((poll: any) =>
    postIdsToFullySend.includes(poll.postId)
  );
  // we edit posts so we add the interactionPolicies
  let postsToSend = postsToSendFiltered
    .filter((elem) => !!elem)
    .map(async (elem) =>
      addPostCanInteract(
        posterId,
        elem,
        usersFollowingPoster,
        usersFollowedByPoster,
        mentions
      )
    );

  let finalPostsToSend = await Promise.all(postsToSend);
  const userIsAdult = isAdult(user?.birthDate);

  if (!userIsAdult && user?.role !== 10) {
    finalPostsToSend = finalPostsToSend.filter((x) => {
      const cwToFilter = (x.content_warning || "").toLowerCase();
      return (
        !cwToFilter.includes("nsfw") &&
        !cwToFilter.includes("lewd") &&
        !cwToFilter.includes("sexual") &&
        !cwToFilter.includes("nudity") &&
        !cwToFilter.includes("porn")
      );
    });
    mediasToSend = mediasToSend.filter((x) => !x.NSFW);
  }

  return {
    rewootIds: finalRewootIds.filter((elem) => !!elem),
    posts: finalPostsToSend,
    emojiRelations: await emojis,
    mentions: mentions.postMentionRelation.filter((elem) => !!elem),
    users: (await users).filter((elem) => !!elem),
    polls: pollsFiltered.filter((elem) => !!elem),
    medias: mediasToSend.filter((elem) => !!elem),
    tags: tagsFiltered.filter((elem) => !!elem),
    likes: likes.filter((elem) => !!elem),
    bookmarks: bookmarks,
    quotes: quotesFiltered.filter((elem) => !!elem),
    quotedPosts: (await quotedPosts)
      .map((elem: any) => filterPost(elem, postIdsToFullySend, doNotFullyHide))
      .filter((elem) => !!elem),
    asks: asks.filter((elem) => !!elem),
  };
}

function filterPost(
  postToBeFilter: any,
  postIdsToFullySend: string[],
  donotHide = false
): any {
  let res = postToBeFilter;
  if (!postIdsToFullySend.includes(res.id)) {
    res = undefined;
  }
  if (res) {
    const ancestorsLength = res.ancestors ? res.ancestors.length : 0;
    res.ancestors = res.ancestors
      ? res.ancestors
        .map((elem: any) => filterPost(elem, postIdsToFullySend, donotHide))
        .filter((elem: any) => !!elem)
      : [];
    res.ancestors = res.ancestors.filter((elem: any) => !(elem == undefined));
    if (ancestorsLength != res.ancestors.length && !donotHide) {
      res = undefined;
    }
  }

  return res;
}

// we are gona do this for likes, quotes, replies and rewoots... and we may will this function too when user interacts with a post!
async function canInteract(
  level: InteractionControlType,
  userId: string,
  postId: string,
  userFollowersInput?: string[],
  userFollowingInput?: string[],
  mentionsInput?: { usersMentioned: string[]; postMentionRelation: any[] }
): Promise<boolean> {
  if (level == InteractionControl.Anyone) {
    return true;
  }
  let usersFollowing = userFollowingInput
    ? userFollowingInput
    : getFollowedsIds(userId);
  let userFollowers = userFollowersInput
    ? userFollowersInput
    : getFollowedsIds(userId, false, {
      getFollowersInstead: true,
    });
  let mentions = mentionsInput ? mentionsInput : getMentionedUserIds([postId]);
  let post: Promise<Post | null> | Post | null = Post.findByPk(postId);
  await Promise.all([usersFollowing, userFollowers, mentions, post]);
  usersFollowing = await usersFollowing;
  userFollowers = await userFollowers;
  mentions = await mentions;
  post = await post;
  // TMP hack
  let res = false;
  if (post) {
    if (post.userId == userId) {
      return true;
    }
    switch (level) {
      case InteractionControl.Anyone: {
        res = false;
        break;
      }
      case InteractionControl.Followers: {
        res = usersFollowing.includes(post.userId);
        break;
      }
      case InteractionControl.Following: {
        // post creator follows you
        res = userFollowers.includes(post.userId);
        break;
      }
      case InteractionControl.FollowersAndMentioned: {
        // post creator follows you
        res =
          usersFollowing.includes(post.userId) ||
          mentions.postMentionRelation.find(
            (elem) => elem.postId == postId && elem.userId == userId
          );
        break;
      }
      case InteractionControl.FollowingAndMentioned: {
        // post creator follows you
        res =
          userFollowers.includes(post.userId) ||
          mentions.postMentionRelation.find(
            (elem) => elem.postId == postId && elem.userId == userId
          );
        break;
      }
      case InteractionControl.FollowersFollowersAndMentioned: {
        res =
          userFollowers.includes(post.userId) ||
          userFollowingInput?.includes(post.userId) ||
          mentions.postMentionRelation.find(
            (elem) => elem.postId == postId && elem.userId == userId
          );
        break;
      }
      case InteractionControl.MentionedUsersOnly: {
        // post creator follows you
        res = mentions.postMentionRelation.find(
          (elem) => elem.postId == postId && elem.userId == userId
        );
        break;
      }
      case InteractionControl.NoOne: {
        // we already check if user is from poster himself. This is a special one for bsky
        res = false;
        break;
      }
      case InteractionControl.SameAsOp: {
        // special one for bsky too
        // ok we need to check for the initial post and to the calculations with it.
        // we look for op post
        const parentsIds = (
          await sequelize.query(
            `SELECT DISTINCT "ancestorId" FROM "postsancestors" where "postsId" = '${post.id}'`,
            {
              type: QueryTypes.SELECT,
            }
          )
        ).map((elem: any) => elem.ancestorId as string);
        const originalPost = await Post.findOne({
          where: {
            hierarchyLevel: 1,
            id: {
              [Op.in]: parentsIds,
            },
          },
        });
        if (!originalPost || originalPost?.id === post.id) {
          return res;
        } else {
          // this will only be used for REPLIES
          res = await canInteract(
            originalPost.replyControl,
            userId,
            originalPost.id,
            userFollowersInput,
            userFollowingInput,
            mentionsInput
          );
        }
      }
    }
  }

  return res;
}

async function addPostCanInteract(
  userId: string,
  postInput: any,
  userFollowersInput?: string[],
  userFollowingInput?: string[],
  mentionsInput?: { usersMentioned: string[]; postMentionRelation: any[] }
): Promise<
  Post & {
    canReply: boolean;
    canLike: boolean;
    canReblog: boolean;
    canQuote: boolean;
  }
> {
  let post: any = { ...postInput };
  let canReply = canInteract(
    post.replyControl,
    userId,
    post.id,
    userFollowersInput,
    userFollowingInput,
    mentionsInput
  );
  let canLike = canInteract(
    post.likeControl,
    userId,
    post.id,
    userFollowersInput,
    userFollowingInput,
    mentionsInput
  );
  let canReblog = canInteract(
    post.reblogControl,
    userId,
    post.id,
    userFollowersInput,
    userFollowingInput,
    mentionsInput
  );
  let canQuote = canInteract(
    post.quoteControl,
    userId,
    post.id,
    userFollowersInput,
    userFollowingInput,
    mentionsInput
  );

  await Promise.all([canReblog, canReply, canQuote, canLike]);
  post.canReply = await canReply;
  post.canLike = await canLike;
  post.canReblog = await canReblog;
  post.canQuote = await canQuote;
  if (post.ancestors) {
    post.ancestors = await Promise.all(
      post.ancestors.map((elem: Post) =>
        addPostCanInteract(
          userId,
          elem.dataValues,
          userFollowersInput,
          userFollowingInput,
          mentionsInput
        )
      )
    );
  }

  return post;
}

export {
  getUnjointedPosts,
  getMedias,
  getQuotes,
  getMentionedUserIds,
  getTags,
  getLikes,
  getBookmarks,
  getEmojis,
  addPostCanInteract,
};