// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

import {Q, Query, Relation} from '@nozbe/watermelondb';
import {children, field, immutableRelation, lazy} from '@nozbe/watermelondb/decorators';
import Model, {Associations} from '@nozbe/watermelondb/Model';

import {MM_TABLES} from '@constants/database';

import type CategoryModel from '@typings/database/models/servers/category';
import type ChannelModel from '@typings/database/models/servers/channel';
import type MyTeamModel from '@typings/database/models/servers/my_team';
import type TeamModelInterface from '@typings/database/models/servers/team';
import type TeamChannelHistoryModel from '@typings/database/models/servers/team_channel_history';
import type TeamMembershipModel from '@typings/database/models/servers/team_membership';
import type TeamSearchHistoryModel from '@typings/database/models/servers/team_search_history';
import type ThreadModel from '@typings/database/models/servers/thread';

const {
    CATEGORY,
    CHANNEL,
    TEAM,
    MY_TEAM,
    TEAM_CHANNEL_HISTORY,
    TEAM_MEMBERSHIP,
    TEAM_SEARCH_HISTORY,
    THREADS_IN_TEAM,
    THREAD,
} = MM_TABLES.SERVER;

/**
 * A Team houses and enables communication to happen across channels and users.
 */
export default class TeamModel extends Model implements TeamModelInterface {
    /** table (name) : Team */
    static table = TEAM;

    /** associations : Describes every relationship to this table. */
    static associations: Associations = {

        /** A TEAM has a 1:N relationship with CATEGORY. A TEAM can possess multiple categories */
        [CATEGORY]: {type: 'has_many', foreignKey: 'team_id'},

        /** A TEAM has a 1:N relationship with CHANNEL. A TEAM can possess multiple channels */
        [CHANNEL]: {type: 'has_many', foreignKey: 'team_id'},

        /** A TEAM can be associated to one MY_TEAM (relationship is 1:1) */
        [MY_TEAM]: {type: 'has_many', foreignKey: 'id'},

        /** A TEAM has a 1:N relationship with TEAM_MEMBERSHIP. A TEAM can regroup multiple users */
        [TEAM_MEMBERSHIP]: {type: 'has_many', foreignKey: 'team_id'},

        /** A TEAM has a 1:N relationship with TEAM_SEARCH_HISTORY. A TEAM can possess multiple search histories*/
        [TEAM_SEARCH_HISTORY]: {type: 'has_many', foreignKey: 'team_id'},

        /** A TEAM has a 1:N relationship with THREADS_IN_TEAM. A TEAM can possess multiple threads */
        [THREADS_IN_TEAM]: {type: 'has_many', foreignKey: 'team_id'},

        /** A TEAM has a 1:1 relationship with TEAM_CHANNEL_HISTORY. */
        [TEAM_CHANNEL_HISTORY]: {type: 'has_many', foreignKey: 'id'},
    };

    /** is_allow_open_invite : Boolean flag indicating if this team is open to the public */
    @field('is_allow_open_invite') isAllowOpenInvite!: boolean;

    /** description : The description for the team */
    @field('description') description!: string;

    /** display_name : The display name for the team */
    @field('display_name') displayName!: string;

    /** is_group_constrained : Boolean flag indicating if members are managed groups */
    @field('is_group_constrained') isGroupConstrained!: boolean;

    /** last_team_icon_updated_at : Timestamp for when this team's icon has been updated last */
    @field('last_team_icon_updated_at') lastTeamIconUpdatedAt!: number;

    /** name : The name for the team */
    @field('name') name!: string;

    /** update_at : The timestamp to when this team was last updated on the server */
    @field('update_at') updateAt!: number;

    /** type : The type of team ( e.g. open/private ) */
    @field('type') type!: string;

    /** allowed_domains : List of domains that can join this team */
    @field('allowed_domains') allowedDomains!: string;

    /** categories : All the categories associated with this team */
    @children(CATEGORY) categories!: Query<CategoryModel>;

    /** channels : All the channels associated with this team */
    @children(CHANNEL) channels!: Query<ChannelModel>;

    /** myTeam : Retrieves additional information about the team that this user is possibly part of. */
    @immutableRelation(MY_TEAM, 'id') myTeam!: Relation<MyTeamModel>;

    /** teamChannelHistory : A history of the channels in this team that has been visited,  ordered by the most recent and capped to the last 5 */
    @immutableRelation(TEAM_CHANNEL_HISTORY, 'id') teamChannelHistory!: Relation<TeamChannelHistoryModel>;

    /** members : All the users associated with this team */
    @children(TEAM_MEMBERSHIP) members!: Query<TeamMembershipModel>;

    /** teamSearchHistories : All the searches performed on this team */
    @children(TEAM_SEARCH_HISTORY) teamSearchHistories!: Query<TeamSearchHistoryModel>;

    /** threads : Threads list belonging to a team */
    @lazy threadsList = this.collections.get<ThreadModel>(THREAD).query(
        Q.on(THREADS_IN_TEAM, Q.and(
            Q.where('team_id', this.id),
            Q.where('loaded_in_global_threads', true),
        )),
        Q.and(
            Q.where('reply_count', Q.gt(0)),
            Q.where('is_following', true),
        ),
        Q.sortBy('last_reply_at', Q.desc),
    );

    /** unreadThreadsList : Unread threads list belonging to a team */
    @lazy unreadThreadsList = this.collections.get<ThreadModel>(THREAD).query(
        Q.on(THREADS_IN_TEAM, 'team_id', this.id),
        Q.and(
            Q.where('reply_count', Q.gt(0)),
            Q.where('is_following', true),
            Q.where('unread_replies', Q.gt(0)),
        ),
        Q.sortBy('last_reply_at', Q.desc),
    );
}