export default class Time {

	/** 1 秒时间戳 */
	public static S = 1E3;
	/** 1 分钟时间戳 */
	public static M = Time.S * 60;
	/** 1 小时时间戳 */
	public static H = Time.M * 60;
	/** 1 天时间戳 */
	public static D = Time.H * 24;

	public static now(): number {
		return new Date().getTime();
	}

	/**
	 * Unix 时间戳转日期
	 *
	 * @param unix 时间戳
	 */
	public static toDate(unix?: number): string {
		if (!unix) return "";
		const d = new Date(unix);
		return `${d.getFullYear()}-${(d.getMonth() + 1).toString().padStart(2, "0")}-${d.getDate().toString().padStart(2, "0")}`;
	}

	/**
	 * Unix 时间戳转时间
	 *
	 * @param unix 时间戳
	 */
	public static toTime(unix?: number): string {
		if (!unix) return "";
		const d = new Date(unix);
		return `${d.getHours().toString().padStart(2, "0")}:${d.getMinutes().toString().padStart(2, "0")}`;
	}

	/**
	 * Unix 时间戳转日期和时间
	 *
	 * @param unix 时间戳
	 */
	public static toDateTime(unix?: number): string {
		if (!unix) return "";
		return `${this.toDate(unix)} ${this.toTime(unix)}`;
	}

	public static toPassedDate(unix?: number): string {
		return this.toPassedDateTime(unix, false);
	}

	public static toPassedDateTime(unix?: number, withDetailTime = true): string {
		if (!unix) {
			return "";
		}
		const now = new Date().getTime();
		const between = now - unix;

		if (Time.D * 4 <= between) {
			return withDetailTime ? this.toDateTime(unix) : this.toDate(unix);
		} else if (Time.D < between) {
			return `${Math.floor(between / Time.D)} 天前`;
		} else if (Time.H < between) {
			return `${Math.floor(between / Time.H)} 小时前`;
		} else if (Time.M < between) {
			return `${Math.floor(between / Time.M)} 分钟前`;
		} else {
			return "刚刚";
		}
	}

	public static between(begin: Date, end?: Date) : any {
		if (!end) {
			end = new Date();
		}
		const cs = 1000, cm = 6E4, ch = 36E5, cd = 864E5, cy = 31536E6;
		const l  = end.getTime() - begin.getTime();
		const y  = Math.floor(l / cy),
			  d  = Math.floor((l / cd) - y * 365),
			  h  = Math.floor((l - (y * 365 + d) * cd) / ch),
			  m  = Math.floor((l - (y * 365 + d) * cd - h * ch) / cm),
			  s  = Math.floor((l - (y * 365 + d) * cd - h * ch - m * cm) / cs),
			  ms = Math.floor(((l - (y * 365 + d) * cd - h * ch - m * cm) / cs - s) * cs);
		return { l, y, d, h, m, s, ms };
	}

	public static toMediaTime(seconds: number): string {
		seconds = Math.floor(seconds);
		const hours = Math.floor(seconds / 3600);
		const minutes = Math.floor((seconds % 3600) / 60);
		const second = seconds % 60;
		if (0 < hours) {
			return `${hours}:${minutes.toString().padStart(2, "0")}:${second.toString().padStart(2, "0")}`;
		}
		return `${minutes.toString().padStart(2, "0")}:${second.toString().padStart(2, "0")}`;
	}
}