/*
	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
	Copyright (C) 2023 Spacebar and Spacebar Contributors

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published
	by the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Affero General Public License for more details.

	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

import { route } from "@spacebar/api";
import { Badge, Config, emitEvent, FieldErrors, handleFile, Member, Relationship, User, UserUpdateEvent } from "@spacebar/util";
import { Request, Response, Router } from "express";
import { In } from "typeorm";
import { PrivateUserProjection, PublicUser, PublicUserProjection, RelationshipType, UserProfileModifySchema } from "@spacebar/schemas";

const router: Router = Router({ mergeParams: true });

router.get("/", route({ responses: { 200: { body: "UserProfileResponse" } } }), async (req: Request, res: Response) => {
    if (req.params.user_id === "@me") req.params.user_id = req.user_id;

    const { guild_id, with_mutual_guilds, with_mutual_friends, with_mutual_friends_count } = req.query;
    const { user_id } = req.params as { [key: string]: string };

    const user = await User.findOneOrFail({
        where: {
            id: user_id,
        },
        relations: { connected_accounts: true },
    });

    const mutual_guilds: object[] = [];
    let premium_guild_since;

    if (with_mutual_guilds == "true") {
        const requested_member = await Member.find({
            where: { id: user_id },
        });
        const self_member = await Member.find({
            where: { id: req.user_id },
        });

        for (const rmem of requested_member) {
            if (rmem.premium_since) {
                if (premium_guild_since) {
                    if (premium_guild_since > rmem.premium_since) {
                        premium_guild_since = rmem.premium_since;
                    }
                } else {
                    premium_guild_since = rmem.premium_since;
                }
            }
            for (const smem of self_member) {
                if (smem.guild_id === rmem.guild_id) {
                    mutual_guilds.push({
                        id: rmem.guild_id,
                        nick: rmem.nick,
                    });
                }
            }
        }
    }

    const guild_member =
        guild_id && typeof guild_id == "string"
            ? await Member.findOneOrFail({
                  where: { id: user_id, guild_id: guild_id },
                  relations: { roles: true },
              })
            : undefined;

    if (guild_member) guild_member.roles = guild_member?.roles.filter((role) => role.id != guild_id);

    // TODO: make proper DTO's in util?

    const userProfile = {
        bio: req.user_bot ? null : user.bio,
        accent_color: user.accent_color,
        banner: user.banner,
        pronouns: user.pronouns,
        theme_colors: user.theme_colors?.map((t) => Number(t)), // these are strings for some reason, they should be numbers
    };

    const guildMemberProfile = {
        accent_color: null,
        banner: guild_member?.banner || null,
        bio: guild_member?.bio || "",
        guild_id,
    };

    const badges = await Badge.find();

    let mutual_friends: PublicUser[] = [];
    let mutual_friends_count = 0;

    if (with_mutual_friends == "true" || with_mutual_friends_count == "true") {
        const relationshipsSelf = await Relationship.find({ where: { from_id: req.user_id, type: RelationshipType.friends } });
        const relationshipsUser = await Relationship.find({ where: { from_id: user_id, type: RelationshipType.friends } });
        const relationshipsIntersection = relationshipsSelf.filter((r1) => relationshipsUser.some((r2) => r2.to_id === r1.to_id));
        if (with_mutual_friends_count) mutual_friends_count = relationshipsIntersection.length;
        if (with_mutual_friends) {
            const users = await User.find({ where: { id: In(relationshipsIntersection.map((r) => r.to_id)) }, select: PublicUserProjection });
            mutual_friends = users.map((u) => u.toPublicUser());
        }
    }

    res.json({
        connected_accounts: user.connected_accounts.filter((x) => x.visibility != 0),
        premium_guild_since: premium_guild_since, // TODO
        premium_since: user.premium_since, // TODO
        mutual_guilds: with_mutual_guilds ? mutual_guilds : undefined, // TODO {id: "", nick: null} when ?with_mutual_guilds=true
        mutual_friends: with_mutual_friends ? mutual_friends : undefined,
        mutual_friends_count: with_mutual_friends_count ? mutual_friends_count : undefined,
        user: user.toPublicUser(),
        premium_type: user.premium_type,
        profile_themes_experiment_bucket: 4, // TODO: This doesn't make it available, for some reason?
        user_profile: userProfile,
        guild_member: { ...guild_member?.toPublicMember(), user: user.toPublicUser() },
        guild_member_profile: guild_id && guildMemberProfile,
        badges: badges.filter((x) => user.badge_ids?.includes(x.id)),
    });
});

router.patch("/", route({ requestBody: "UserProfileModifySchema" }), async (req: Request, res: Response) => {
    const body = req.body as UserProfileModifySchema;

    if (body.banner) body.banner = await handleFile(`/banners/${req.user_id}`, body.banner as string);
    const user = await User.findOneOrFail({
        where: { id: req.user_id },
        select: [...PrivateUserProjection, "data"],
    });

    if (body.bio) {
        const { maxBio } = Config.get().limits.user;
        if (body.bio.length > maxBio) {
            throw FieldErrors({
                bio: {
                    code: "BIO_INVALID",
                    message: `Bio must be less than ${maxBio} in length`,
                },
            });
        }
    }

    user.assign(body);
    await user.save();

    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
    // @ts-ignore
    delete user.data;

    // TODO: send update member list event in gateway
    await emitEvent({
        event: "USER_UPDATE",
        user_id: req.user_id,
        data: user,
    } as UserUpdateEvent);

    res.json({
        accent_color: user.accent_color,
        bio: user.bio,
        banner: user.banner,
        theme_colors: user.theme_colors,
        pronouns: user.pronouns,
    });
});

export default router;
