class LLMS_Date {

	/**
	 * Set date to dd/mm/yyyy
	 * Optional type value for converting AU date format
	 * Converts any type of date format
	 *
	 * @param  [date] $date [datestring]
	 * @return [date]       [datestring]
	 */
	public static function pretty_date( $date, $type = '' ) {

		if ( 'au' === $type ) {
			return date( 'd/m/Y', strtotime( $date ) );
		} else {
			return date( 'm/d/Y', strtotime( $date ) );
		}

	}

	/**
	 * Date filter options for analytics
	 *
	 * @return [array] [array of date filters]
	 */
	public static function date_filters() {
		$filters = array(
			'none'    => 'Enter Specific Dates',
			'week'    => 'Last 7 Days',
			'month'   => 'Current Month',
			'quarter' => 'Current Quarter',
			'year'    => 'Current Year',
		);
		return $filters;
	}

	/**
	 * Converts date to yyyymmdd
	 * Converts any type of date format
	 * Optional field type accepts 'au' to convert Australian dd/mm/yyyy date format
	 * Used for date db storage
	 *
	 * @param  [date] $date [datestring]
	 * @param  [type] $type [optional field for managing AU date conversions]
	 * @return [date]       [datestring]
	 */
	public static function db_date( $date, $type = '' ) {

		if ( 'au' === $type ) {
			list($d, $m, $y) = preg_split( '/\//', $date );
			$date            = sprintf( '%4d-%02d-%02d', $y, $m, $d );
		} else {
			$date = date( 'Y-m-d', strtotime( $date ) );
		}

		return $date;
	}

	/**
	 * Get date range by filter
	 *
	 * Calculates the date range based on the filter value selected.
	 *
	 * @param  string $filter
	 * @return array  $date_range
	 */
	public static function get_date_range_by_filter( $filter ) {

		$today         = current_time( 'Y-m-d' );
		$current_month = date( 'm', strtotime( $today ) );
		$current_year  = date( 'Y', strtotime( $today ) );

		if ( 'week' === $filter ) {

			$start_date = self::db_date( $today . '- 7 days' );
			$end_date   = self::db_date( $today );

		} elseif ( 'month' === $filter ) {

			$start_date = date( 'Y-m-01', strtotime( $today ) );
			$end_date   = date( 'Y-m-t', strtotime( $today ) );

		} elseif ( 'quarter' === $filter ) {

			if ( $current_month >= 1 && $current_month <= 3 ) {
				$start_date = $current_year . '-01-01';
				$end_date   = $current_year . '-03-31';
			} elseif ( $current_month >= 4 && $current_month <= 6 ) {
				$start_date = $current_year . '-04-01';
				$end_date   = $current_year . '-06-30';
			} elseif ( $current_month >= 7 && $current_month <= 9 ) {
				$start_date = $current_year . '-07-01';
				$end_date   = $current_year . '-09-30';
			} elseif ( $current_month >= 10 && $current_month <= 12 ) {
				$start_date = $current_year . '-10-01';
				$end_date   = ( $current_year + 1 ) . '-01-01';
			}
		} elseif ( 'year' === $filter ) {

			$start_date = $current_year . '-01-01';
			$end_date   = ( $current_year + 1 ) . '-01-01';
		}

		$date_range = array(
			'start_date' => $start_date,
			'end_date'   => $end_date,
		);

		return $date_range;

	}

	/**
	 * Query Filter for for last 7 days
	 * Appends AND statement to WP_Query WHERE clause
	 * Only retrieves posts created
	 *
	 * @param  string $where [WP_Query Where clause]
	 * @return [string]        [modified where clause]
	 */
	public function last_seven_days( $where = '' ) {
		global $wpdb;

		$where .= $wpdb->prepare( ' AND post_date > %s', date( 'Y-m-d', strtotime( '-7 days' ) ) );

		return $where;
	}

	public static function get_last_login_date( $user_id ) {

		$date = get_user_meta( $user_id, 'llms_last_login', true );

		if ( $date ) {
			return date( 'd.m.Y H:i:s', get_user_meta( $user_id, 'llms_last_login', true ) );
		} else {
			return false;
		}

	}

	/**
	 * @todo  deprecate
	 */
	public static function get_localized_date_string() {
		return strftime( _x( '%1$b %2$d, %3$Y @ %4$I:%5$M %6$p', 'Localized Order DateTime', 'lifterlms' ) ); // phpcs:ignore Generic.PHP.DeprecatedFunctions.Deprecated -- Unused deprecated function to be removed shortly.
	}

	public static function convert_to_hours_minutes_string( $time ) {
		$decimal_part = $time - floor( $time );
		settype( $time, 'integer' );
		if ( $time < 1 ) {
			return;
		}
		$hours   = floor( $time / 60 );
		$minutes = ( $time % 60 );
		$seconds = ( 60 * $decimal_part );

		$hours_string   = '';
		$minutes_string = '';
		$seconds_string = '';

		// Determine hours vs hour in string.
		if ( ! empty( $hours ) ) {
			if ( $hours > 1 ) {
				$hour_desc = __( 'hours', 'lifterlms' );
			} else {
				$hour_desc = __( 'hour', 'lifterlms' );
			}

			$hours_string = sprintf( __( '%1$d %2$s ', 'lifterlms' ), $hours, $hour_desc );
		} else {
			if ( ! empty( $seconds ) ) {
				if ( $seconds > 1 ) {
					$second_desc = __( 'seconds', 'lifterlms' );
				} else {
					$second_desc = __( 'second', 'lifterlms' );
				}

				$seconds_string = sprintf( ' %d %s', $seconds, $second_desc );

			}
		}

		// Determine minutes vs minute in string.
		if ( ! empty( $minutes ) ) {
			if ( $minutes > 1 ) {
				$minute_desc = __( 'minutes', 'lifterlms' );
			} else {
				$minute_desc = __( 'minute', 'lifterlms' );
			}

			$minutes_string = sprintf( ' %d %s', $minutes, $minute_desc );

		}

		return $hours_string . $minutes_string . $seconds_string;
	}



}