import autobind from 'autobind-decorator';
import Chart, { KVs } from '../core';
import { Users } from '@/models/index';
import { Not, IsNull } from 'typeorm';
import { User } from '@/models/entities/user';
import { name, schema } from './entities/users';

/**
 * ユーザー数に関するチャート
 */
// eslint-disable-next-line import/no-default-export
export default class UsersChart extends Chart<typeof schema> {
	constructor() {
		super(name, schema);
	}

	@autobind
	protected async queryCurrentState(): Promise<Partial<KVs<typeof schema>>> {
		const [localCount, remoteCount] = await Promise.all([
			Users.count({ host: null }),
			Users.count({ host: Not(IsNull()) }),
		]);

		return {
			'local.total': localCount,
			'remote.total': remoteCount,
		};
	}

	@autobind
	public async update(user: { id: User['id'], host: User['host'] }, isAdditional: boolean): Promise<void> {
		const prefix = Users.isLocalUser(user) ? 'local' : 'remote';

		await this.commit({
			[`${prefix}.total`]: isAdditional ? 1 : -1,
			[`${prefix}.inc`]: isAdditional ? 1 : 0,
			[`${prefix}.dec`]: isAdditional ? 0 : 1,
		});
	}
}