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// SPDX-FileCopyrightText: 2024 Shota FUJI <pockawoooh@gmail.com>
// SPDX-License-Identifier: AGPL-3.0-only

import * as proto from "@bufbuild/protobuf";
import { TZDate, tz } from "@date-fns/tz";
import { DateSchema } from "@yamori/proto/yamori/type/v1/date_pb.js";
import { startOfDay, type DateArg } from "date-fns";

// 全ての日付は JST で計算される
const TZ = "Asia/Tokyo";

export function fromProtoDate(d: proto.MessageShape<typeof DateSchema>): Date {
	return TZDate.tz(TZ, d.year, d.month - 1, d.day, 0, 0, 0);
}

export function toProtoDate<D extends Date>(
	d: DateArg<D>,
): proto.MessageShape<typeof DateSchema> {
	const start = startOfDay(d, { in: tz(TZ) });

	return proto.create(DateSchema, {
		year: start.getFullYear(),
		month: start.getMonth() + 1,
		day: start.getDate(),
	});
}

export function isSameDate(
	a: proto.MessageShape<typeof DateSchema>,
	b: proto.MessageShape<typeof DateSchema>,
): boolean {
	return a.year === b.year && a.month === b.month && a.day === b.day;
}