= wp_remote_get( 'https://public.api.tapin.ir/api/v1/public/state/tree/' );

			if ( is_wp_error( $response ) ) {
				$zone = get_option( 'pws_tapin_zone', null );

				if ( is_null( $zone ) ) {
					$zone = file_get_contents( PWS_DIR . '/data/tapin.json' );
				}

			} else {
				$data = $response['body'];

				$data = json_decode( $data, true )['entries'];

				$zone = [];

				foreach ( $data as $state ) {

					$zone[ $state['code'] ] = [
						'title'  => trim( $state['title'] ),
						'cities' => [],
					];

					foreach ( $state['cities'] as $city ) {
						$title = trim( str_replace( '-' . $state['title'], '', $city['title'] ) );

						$zone[ $state['code'] ]['cities'][ $city['code'] ] = $title;
					}

				}

				set_transient( 'pws_tapin_zone', $zone, WEEK_IN_SECONDS );
				update_option( 'pws_tapin_zone', $zone );
			}
		}

		return $zone;
	}

	public static function states() {

		$states = get_transient( 'pws_tapin_states' );

		if ( $states === false || count( (array) $states ) == 0 ) {

			$zone = self::zone();

			$states = [];

			foreach ( $zone as $code => $state ) {
				$states[ $code ] = trim( $state['title'] );
			}

			uasort( $states, [ self::class, 'pws_sort_state' ] );

			set_transient( 'pws_tapin_states', $states, DAY_IN_SECONDS );
		}

		return apply_filters( 'pws_states', $states );
	}

	public static function cities( $state_id = null ) {

		$cities = get_transient( 'pws_tapin_cities_' . $state_id );

		if ( $cities === false || count( (array) $cities ) == 0 ) {

			$zone = self::zone();

			if ( is_null( $state_id ) ) {

				$state_cities = array_column( self::zone(), 'cities' );

				$cities = [];

				foreach ( $state_cities as $state_city ) {
					$cities += $state_city;
				}

			} else if ( isset( $zone[ $state_id ]['cities'] ) ) {
				$cities = $zone[ $state_id ]['cities'];

				asort( $cities );
			} else {
				return [];
			}

			set_transient( 'pws_tapin_cities_' . $state_id, $cities, DAY_IN_SECONDS );
		}

		return apply_filters( 'pws_cities', $cities, $state_id );
	}

	public static function get_city( $city_id ) {

		$cities = self::cities();

		return $cities[ $city_id ] ?? null;
	}

	public function check_states_beside( $source, $destination ) {

		if ( $source == $destination ) {
			return 'in';
		}

		$is_beside[3][16] = true;
		$is_beside[3][15] = true;
		$is_beside[3][12] = true;

		$is_beside[16][3]  = true;
		$is_beside[16][18] = true;
		$is_beside[16][12] = true;

		$is_beside[15][3]  = true;
		$is_beside[15][2]  = true;
		$is_beside[15][12] = true;

		$is_beside[6][24] = true;
		$is_beside[6][20] = true;
		$is_beside[6][28] = true;
		$is_beside[6][11] = true;
		$is_beside[6][10] = true;
		$is_beside[6][9]  = true;
		$is_beside[6][30] = true;
		$is_beside[6][25] = true;
		$is_beside[6][5]  = true;

		$is_beside[31][1]  = true;
		$is_beside[31][11] = true;
		$is_beside[31][8]  = true;
		$is_beside[31][13] = true;

		$is_beside[27][19] = true;
		$is_beside[27][20] = true;
		$is_beside[27][4]  = true;

		$is_beside[21][28] = true;
		$is_beside[21][4]  = true;
		$is_beside[21][5]  = true;
		$is_beside[21][23] = true;

		$is_beside[1][31] = true;
		$is_beside[1][11] = true;
		$is_beside[1][10] = true;
		$is_beside[1][13] = true;
		$is_beside[1][9]  = true;

		$is_beside[24][28] = true;
		$is_beside[24][4]  = true;
		$is_beside[24][20] = true;
		$is_beside[24][6]  = true;

		$is_beside[30][26] = true;
		$is_beside[30][22] = true;
		$is_beside[30][25] = true;
		$is_beside[30][6]  = true;
		$is_beside[30][9]  = true;
		$is_beside[30][7]  = true;

		$is_beside[7][30] = true;
		$is_beside[7][29] = true;
		$is_beside[7][9]  = true;

		$is_beside[29][7]  = true;
		$is_beside[29][14] = true;
		$is_beside[29][9]  = true;

		$is_beside[4][27] = true;
		$is_beside[4][21] = true;
		$is_beside[4][20] = true;
		$is_beside[4][28] = true;
		$is_beside[4][24] = true;

		$is_beside[12][2]  = true;
		$is_beside[12][15] = true;
		$is_beside[12][3]  = true;
		$is_beside[12][16] = true;
		$is_beside[12][18] = true;
		$is_beside[12][17] = true;
		$is_beside[12][8]  = true;

		$is_beside[9][13] = true;
		$is_beside[9][1]  = true;
		$is_beside[9][10] = true;
		$is_beside[9][6]  = true;
		$is_beside[9][29] = true;
		$is_beside[9][7]  = true;
		$is_beside[9][30] = true;

		$is_beside[26][30] = true;
		$is_beside[26][22] = true;
		$is_beside[26][23] = true;

		$is_beside[5][6]  = true;
		$is_beside[5][25] = true;
		$is_beside[5][21] = true;
		$is_beside[5][23] = true;
		$is_beside[5][28] = true;
		$is_beside[5][22] = true;

		$is_beside[8][12] = true;
		$is_beside[8][17] = true;
		$is_beside[8][11] = true;
		$is_beside[8][31] = true;
		$is_beside[8][13] = true;
		$is_beside[8][2]  = true;

		$is_beside[10][1]  = true;
		$is_beside[10][11] = true;
		$is_beside[10][9]  = true;
		$is_beside[10][6]  = true;

		$is_beside[18][16] = true;
		$is_beside[18][19] = true;
		$is_beside[18][17] = true;
		$is_beside[18][12] = true;

		$is_beside[22][25] = true;
		$is_beside[22][5]  = true;
		$is_beside[22][23] = true;
		$is_beside[22][26] = true;
		$is_beside[22][30] = true;

		$is_beside[19][18] = true;
		$is_beside[19][17] = true;
		$is_beside[19][20] = true;
		$is_beside[19][27] = true;

		$is_beside[28][24] = true;
		$is_beside[28][4]  = true;
		$is_beside[28][21] = true;
		$is_beside[28][5]  = true;
		$is_beside[28][6]  = true;

		$is_beside[14][13] = true;
		$is_beside[14][29] = true;
		$is_beside[14][9]  = true;

		$is_beside[2][13] = true;
		$is_beside[2][15] = true;
		$is_beside[2][12] = true;
		$is_beside[2][8]  = true;

		$is_beside[20][27] = true;
		$is_beside[20][19] = true;
		$is_beside[20][17] = true;
		$is_beside[20][11] = true;
		$is_beside[20][6]  = true;
		$is_beside[20][24] = true;
		$is_beside[20][4]  = true;

		$is_beside[13][14] = true;
		$is_beside[13][9]  = true;
		$is_beside[13][1]  = true;
		$is_beside[13][31] = true;
		$is_beside[13][6]  = true;
		$is_beside[13][8]  = true;
		$is_beside[13][2]  = true;

		$is_beside[11][6]  = true;
		$is_beside[11][10] = true;
		$is_beside[11][1]  = true;
		$is_beside[11][31] = true;
		$is_beside[11][20] = true;
		$is_beside[11][8]  = true;
		$is_beside[11][17] = true;

		$is_beside[23][21] = true;
		$is_beside[23][5]  = true;
		$is_beside[23][22] = true;
		$is_beside[23][26] = true;

		$is_beside[17][19] = true;
		$is_beside[17][20] = true;
		$is_beside[17][18] = true;
		$is_beside[17][11] = true;
		$is_beside[17][8]  = true;
		$is_beside[17][12] = true;

		$is_beside[25][5]  = true;
		$is_beside[25][22] = true;
		$is_beside[25][30] = true;

		return isset( $is_beside[ $source ][ $destination ] ) && $is_beside[ $source ][ $destination ] === true ? 'beside' : 'out';
	}

	public static function shop() {

		$shop = get_transient( 'pws_tapin_shop' );

		if ( $shop === false || count( (array) $shop ) == 0 ) {

			$shop = self::request( 'v2/public/shop/detail', [
				'shop_id' => PWS()->get_option( 'tapin.shop_id' ),
			] );

			if ( is_wp_error( $shop ) ) {
				return get_option( 'pws_tapin_shop' );
			} else {
				$shop = $shop->entries;
			}

			set_transient( 'pws_tapin_shop', $shop, DAY_IN_SECONDS );
			update_option( 'pws_tapin_shop', $shop );
		}

		return $shop;
	}

	public static function get_cart_weight() {

		$weight = floatval( PWS()->get_option( 'tapin.package_weight', 500 ) );

		foreach ( WC()->cart->get_cart() as $cart_item ) {

			if ( $cart_item['data']->is_virtual() ) {
				continue;
			}

			if ( $cart_item['data']->has_weight() ) {
				$weight += wc_get_weight( $cart_item['data']->get_weight() * $cart_item['quantity'], 'g' );
			} else {
				$weight += floatval( PWS()->get_option( 'tapin.product_weight', 500 ) ) * $cart_item['quantity'];
			}
		}

		return $weight;
	}

	public static function set_gateway( string $gateway ) {

		if ( in_array( $gateway, array_keys( self::$gateways ) ) ) {
			self::$gateway = $gateway;
		}

	}

}