import autobind from 'autobind-decorator';
import Chart, { Obj, DeepPartial } from '../../core';
import { User } from '../../../../models/entities/user';
import { SchemaType } from '@/misc/schema';
import { Notes } from '../../../../models';
import { Note } from '../../../../models/entities/note';
import { name, schema } from '../schemas/per-user-notes';

type PerUserNotesLog = SchemaType<typeof schema>;

export default class PerUserNotesChart extends Chart<PerUserNotesLog> {
	constructor() {
		super(name, schema, true);
	}

	@autobind
	protected genNewLog(latest: PerUserNotesLog): DeepPartial<PerUserNotesLog> {
		return {
			total: latest.total,
		};
	}

	@autobind
	protected aggregate(logs: PerUserNotesLog[]): PerUserNotesLog {
		return {
			total: logs[0].total,
			inc: logs.reduce((a, b) => a + b.inc, 0),
			dec: logs.reduce((a, b) => a + b.dec, 0),
			diffs: {
				reply: logs.reduce((a, b) => a + b.diffs.reply, 0),
				renote: logs.reduce((a, b) => a + b.diffs.renote, 0),
				normal: logs.reduce((a, b) => a + b.diffs.normal, 0),
			},
		};
	}

	@autobind
	protected async fetchActual(group: string): Promise<DeepPartial<PerUserNotesLog>> {
		const [count] = await Promise.all([
			Notes.count({ userId: group }),
		]);

		return {
			total: count,
		};
	}

	@autobind
	public async update(user: { id: User['id'] }, note: Note, isAdditional: boolean) {
		const update: Obj = {
			diffs: {}
		};

		update.total = isAdditional ? 1 : -1;

		if (isAdditional) {
			update.inc = 1;
		} else {
			update.dec = 1;
		}

		if (note.replyId != null) {
			update.diffs.reply = isAdditional ? 1 : -1;
		} else if (note.renoteId != null) {
			update.diffs.renote = isAdditional ? 1 : -1;
		} else {
			update.diffs.normal = isAdditional ? 1 : -1;
		}

		await this.inc(update, user.id);
	}
}