<?php
/**
 * @package STATS4WPPlugin
 * @version 1.4.14
 */
namespace STATS4WP\Stats;

use STATS4WP\Api\IP;
use STATS4WP\Api\UserAgent;
use STATS4WP\Api\TimeZone;
use STATS4WP\Api\User;
use STATS4WP\Api\Referred;
use STATS4WP\Api\GeoIP;

use STATS4WP\Core\DB;
use STATS4WP\Core\Options;

class Visitor {


	public function register() {
		if ( Options::get_option( 'version' ) === STATS4WP_VERSION ) {
			add_action( 'init', array( $this, 'visitor' ) );
		}
	}

	public function visitor() {
		global $wpdb;

		// Get User IP
		$user_ip = IP::store_ip();

		// Get User Agent
		$user_agent = UserAgent::get_user_agent();

		// Check Exist This User in Current Day
		$same_visitor = self::exist_ip_in_day( $user_ip, $user_agent );

		// If we have a new Visitor in Day
		if ( ! $same_visitor ) {
			// Prepare Visitor information
			if ( ! empty( $_SERVER['HTTP_ACCEPT_LANGUAGE'] ) ) {
				$language = substr( sanitize_text_field( wp_unslash( $_SERVER['HTTP_ACCEPT_LANGUAGE'] ) ), 0, 2 );
			} else {
				$language = 'no';
			}
			$visitor = array(
				'last_counter' => TimeZone::get_current_gmdate( 'Y-m-d' ),
				'hour'         => gmdate( 'H:i:s' ),
				'referred'     => Referred::get(),
				'agent'        => $user_agent['browser'],
				'agent_v'      => $user_agent['b-version'],
				'platform'     => $user_agent['platform'],
				'platform_v'   => $user_agent['p-version'],
				'engine'       => $user_agent['engine'],
				'engine_v'     => $user_agent['e-version'],
				'device'       => $user_agent['device'],
				'manufacturer' => $user_agent['device-manufacturer'],
				'model'        => $user_agent['device-model'],
				'ip'           => $user_ip,
				'location'     => GeoIP::get_country( $user_ip ),
				'user_id'      => User::get_user_id(),
				'language'     => ( '' === $language ) ? '#' : $language,
				'UAString'     => ( true === Options::get_option( 'store_ua' ) ? UserAgent::get_http_user_agent() : '' ),
				'hits'         => 1,
			);
			$visitor = apply_filters( 'stats4wp_visitor_information', $visitor );

			// Save Visitor TO DB
			$visitor_id = self::save_visitor( $visitor );
		} else {
			// Get Current Visitor ID
			$visitor_id = $same_visitor->ID;
			// Update Visitor Count in DB
			if ( ! isset( $wpdb->stats4wp_visitor ) ) {
				$wpdb->stats4wp_visitor = DB::table( 'visitor' );
			}
			$wpdb->query(
				$wpdb->prepare(
					"UPDATE $wpdb->stats4wp_visitor
					SET `hits` = `hits` + %d 
					WHERE `ID` = %d",
					array(
						1,
						$visitor_id,
					)
				)
			);
		}
	}
	/**
	 * Check This ip has recorded in Custom Day
	 *
	 * @param  $ip
	 * @param  $date
	 * @return bool
	 */
	public static function exist_ip_in_day( $ip, $agent, $date = false ) {
		global $wpdb;
		if ( ! isset( $wpdb->stats4wp_visitor ) ) {
			$wpdb->stats4wp_visitor = DB::table( 'visitor' );
		}
		$calc_date = ( $date === false ? TimeZone::get_current_gmdate( 'Y-m-d' ) : $date );
		$agent_c   = $agent['browser'];
		$visitor   = $wpdb->get_row(
			$wpdb->prepare(
				"SELECT * FROM $wpdb->stats4wp_visitor 
				WHERE `last_counter` = %s 
				AND `ip` = %s 
				AND `agent` = %s",
				array(
					$calc_date,
					$ip,
					$agent_c,
				)
			)
		);
		return ( ! $visitor ? false : $visitor );
	}

	/**
	 * Save new Visitor To DB
	 *
	 * @param  array $visitor
	 * @return INT
	 */
	public static function save_visitor( $visitor = array() ) {
		global $wpdb;

		// Save to WordPress Database
		$insert = $wpdb->insert(
			DB::table( 'visitor' ),
			$visitor
		);
		if ( ! $insert ) {
			if ( ! empty( $wpdb->last_error ) && WP_DEBUG ) {
				error_log( $wpdb->last_error );
			}
		}

		// Get Visitor ID
		$visitor_id = $wpdb->insert_id;

		return $visitor_id;
	}
}