module.exports = Self => {
    Self.remoteMethod('getList', {
        description: 'Get list of the available and active notification subscriptions',
        accessType: 'READ',
        accepts: [
            {
                arg: 'id',
                type: 'number',
                description: 'User to modify',
                http: {source: 'path'}
            }
        ],
        returns: {
            type: 'object',
            root: true
        },
        http: {
            path: `/:id/getList`,
            verb: 'GET'
        }
    });

    Self.getList = async(id, options) => {
        const notifications = new Map();
        const models = Self.app.models;

        const myOptions = {};

        if (typeof options == 'object')
            Object.assign(myOptions, options);

        const roles = await models.RoleMapping.find({
            fields: ['roleId'],
            where: {principalId: id}
        }, myOptions);

        const availableNotifications = await models.NotificationAcl.find({
            include: {relation: 'notification'},
            where: {
                roleFk: {
                    inq: roles.map(role => role.roleId),
                },
            }
        }, myOptions);

        for (acl of availableNotifications) {
            notifications.set(acl.notificationFk, {
                id: null,
                notificationFk: acl.notificationFk,
                name: acl.notification().name,
                description: acl.notification().description,
                active: false,
            });
        }

        const activeNotifications = await models.NotificationSubscription.find({
            include: {relation: 'notification'},
            where: {userFk: id}
        }, myOptions);

        for (subscription of activeNotifications) {
            const notification = notifications.get(subscription.notificationFk);
            if (notification) {
                notification.active = true;
                notification.id = subscription.id;
            }
        }

        return [...notifications.values()];
    };
};