<?php
/**
 * Class: Settings
 *
 * Settings class file of the extension.
 *
 * @package mwp-al-ext
 * @since 1.0.0
 */

namespace WSAL\MainWPExtension;

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Settings Class
 *
 * Settings class of the extension.
 */
class Settings {

	/**
	 * Get Plugin Option.
	 *
	 * @param string  $option  – Option name.
	 * @param boolean $default – Default value.
	 * @return mixed
	 */
	public function get_option( $option, $default = false ) {
		return get_option( MWPAL_OPT_PREFIX . $option, $default );
	}

	/**
	 * Update Plugin Option.
	 *
	 * @param string $option – Option name.
	 * @param mixed  $value  – Option value.
	 * @return boolean
	 */
	public function update_option( $option, $value = false ) {
		return update_option( MWPAL_OPT_PREFIX . $option, $value );
	}

	/**
	 * Delete Plugin Option.
	 *
	 * @param string $option – Option name.
	 * @return boolean
	 */
	public function delete_option( $option ) {
		return delete_option( MWPAL_OPT_PREFIX . $option );
	}

	/**
	 * Checks if extension is activated or not.
	 *
	 * @param string $default - Default value to return if option doesn't exist.
	 * @return string
	 */
	public function is_extension_activated( $default = 'no' ) {
		return $this->get_option( 'activity-extension-activated', $default );
	}

	/**
	 * Updates extension activated option.
	 *
	 * @param string $value - Value of the option.
	 * @return boolean
	 */
	public function set_extension_activated( $value ) {
		return $this->update_option( 'activity-extension-activated', $value );
	}

	/**
	 * Datetime used in the Alerts.
	 *
	 * @param bool $line_break – Line break.
	 */
	public function get_date_time_format( $line_break = true ) {
		if ( $line_break ) {
			$date_time_format = $this->get_date_format() . '<\b\r>' . $this->get_time_format();
		} else {
			$date_time_format = $this->get_date_format() . ' ' . $this->get_time_format();
		}

		$wp_time_format = get_option( 'time_format' );
		if ( stripos( $wp_time_format, 'A' ) !== false ) {
			$date_time_format .= '.$$$&\n\b\s\p;A';
		} else {
			$date_time_format .= '.$$$';
		}
		return $date_time_format;
	}

	/**
	 * Date Format from WordPress General Settings.
	 */
	public function get_date_format() {
		$wp_date_format = get_option( 'date_format' );
		$search         = array( 'F', 'M', 'n', 'j', ' ', '/', 'y', 'S', ',', 'l', 'D' );
		$replace        = array( 'm', 'm', 'm', 'd', '-', '-', 'Y', '', '', '', '' );
		$date_format    = str_replace( $search, $replace, $wp_date_format );
		return $date_format;
	}

	/**
	 * Time Format from WordPress General Settings.
	 */
	public function get_time_format() {
		$wp_time_format = get_option( 'time_format' );
		$search         = array( 'a', 'A', 'T', ' ' );
		$replace        = array( '', '', '', '' );
		$time_format    = str_replace( $search, $replace, $wp_time_format );
		return $time_format;
	}

	/**
	 * Get MainWP Child Sites.
	 *
	 * @return array
	 */
	public function get_mwp_child_sites() {
		$activity_log = \WSAL\MainWPExtension\Activity_Log::get_instance();
		return apply_filters( 'mainwp-getsites', $activity_log->get_child_file(), $activity_log->get_child_key(), null );
	}

	/**
	 * Set Alert Views Per Page.
	 *
	 * @param int $newvalue – New value.
	 */
	public function set_view_per_page( $newvalue ) {
		$perpage = max( $newvalue, 1 );
		$this->update_option( 'items-per-page', $perpage );
	}

	/**
	 * Get Alert Views Per Page.
	 *
	 * @return int
	 */
	public function get_view_per_page() {
		return (int) $this->get_option( 'items-per-page', 10 );
	}

	/**
	 * Return Site ID.
	 *
	 * @return integer
	 */
	public function get_view_site_id() {
		// @codingStandardsIgnoreStart
		$site_id = isset( $_GET['mwpal-site-id'] ) ? sanitize_text_field( $_GET['mwpal-site-id'] ) : 0; // Site ID.
		// @codingStandardsIgnoreEnd

		if ( 'dashboard' !== $site_id ) {
			return (int) $site_id;
		}
		return $site_id;
	}

	/**
	 * Method: Get number of hours since last logged alert.
	 *
	 * @return mixed – False if $created_on is empty | Number of hours otherwise.
	 *
	 * @param float $created_on – Timestamp of last logged alert.
	 */
	public function get_hours_since_last_alert( $created_on ) {
		// If $created_on is empty, then return.
		if ( empty( $created_on ) ) {
			return false;
		}

		// Last alert date.
		$created_date = new \DateTime( date( 'Y-m-d H:i:s', $created_on ) );

		// Current date.
		$current_date = new \DateTime( 'NOW' );

		// Calculate time difference.
		$time_diff = $current_date->diff( $created_date );
		$diff_days = $time_diff->d; // Difference in number of days.
		$diff_hrs  = $time_diff->h; // Difference in number of hours.
		$total_hrs = ( $diff_days * 24 ) + $diff_hrs; // Total number of hours.

		// Return difference in hours.
		return $total_hrs;
	}

	/**
	 * Return audit log columns.
	 *
	 * @return array
	 */
	public function get_columns() {
		$columns = array(
			'site'       => '1',
			'alert_code' => '1',
			'type'       => '1',
			'date'       => '1',
			'username'   => '1',
			'source_ip'  => '1',
			'message'    => '1',
		);

		// Get selected columns.
		$selected = $this->get_columns_selected();

		if ( ! empty( $selected ) ) {
			$columns  = array(
				'site'       => '0',
				'alert_code' => '0',
				'type'       => '0',
				'date'       => '0',
				'username'   => '0',
				'source_ip'  => '0',
				'message'    => '0',
			);
			$selected = (array) json_decode( $selected );
			$columns  = array_merge( $columns, $selected );
		}
		return $columns;
	}

	/**
	 * Get Selected Columns.
	 *
	 * @return string
	 */
	public function get_columns_selected() {
		return $this->get_option( 'columns' );
	}

	/**
	 * Set Columns.
	 *
	 * @param array $columns – Columns.
	 */
	public function set_columns( $columns ) {
		$this->update_option( 'columns', wp_json_encode( $columns ) );
	}

	/**
	 * Get WSAL Child Sites.
	 *
	 * @return array
	 */
	public function get_wsal_child_sites() {
		// Check if the WSAL child sites option exists.
		$child_sites = $this->get_option( 'wsal-child-sites' );

		// Get MainWP Child sites.
		$mwp_sites    = $this->get_mwp_child_sites();
		$activity_log = \WSAL\MainWPExtension\Activity_Log::get_instance();

		if ( empty( $child_sites ) && ! is_array( $child_sites ) && ! empty( $mwp_sites ) ) {
			foreach ( $mwp_sites as $site ) {
				$post_data = array( 'action' => 'check_wsal' );

				// Call to child sites to check if WSAL is installed on them or not.
				$results[ $site['id'] ] = apply_filters(
					'mainwp_fetchurlauthed',
					$activity_log->get_child_file(),
					$activity_log->get_child_key(),
					$site['id'],
					'extra_excution',
					$post_data
				);
			}

			if ( ! empty( $results ) && is_array( $results ) ) {
				$child_sites = array();

				foreach ( $results as $site_id => $site_obj ) {
					if ( empty( $site_obj ) ) {
						continue;
					} elseif ( true === $site_obj->wsal_installed ) {
						$child_sites[ $site_id ] = $site_obj;
					}
				}
				$this->update_option( 'wsal-child-sites', $child_sites );
			}
		}
		return $child_sites;
	}

	/**
	 * Set WSAL Child Sites.
	 *
	 * @param array $site_ids – Array of Site ids.
	 * @return void
	 */
	public function set_wsal_child_sites( $site_ids ) {
		$wsal_sites     = $this->get_wsal_child_sites(); // Get WSAL child sites.
		$disabled_sites = $this->get_option( 'disabled-wsal-sites', array() ); // Get already disabled sites.
		$new_sites      = array();

		// Set new WSAL sites.
		if ( ! empty( $site_ids ) && is_array( $site_ids ) ) {
			foreach ( $site_ids as $id ) {
				if ( isset( $wsal_sites[ $id ] ) ) {
					$new_sites[ $id ] = $wsal_sites[ $id ];
					unset( $wsal_sites[ $id ] );
				} elseif ( isset( $disabled_sites[ $id ] ) ) {
					$new_sites[ $id ] = $disabled_sites[ $id ];
					unset( $disabled_sites[ $id ] );
				} else {
					$new_sites[ $id ] = new \stdClass();
				}
			}
		}

		// Remove events of removed sites from the DB.
		if ( ! empty( $wsal_sites ) && is_array( $wsal_sites ) ) {
			foreach ( $wsal_sites as $site_id => $site ) {
				// Delete events by site id.
				$delete_query = new \WSAL\MainWPExtension\Models\OccurrenceQuery();
				$delete_query->addCondition( 'site_id = %s ', $site_id );
				$delete_query->getAdapter()->Delete( $delete_query );
				$disabled_sites[ $site_id ] = $site;
			}
		}

		$this->update_option( 'wsal-child-sites', $new_sites );
		$this->update_option( 'disabled-wsal-sites', $disabled_sites );
	}

	/**
	 * Get Timezone.
	 *
	 * @return string
	 */
	public function get_timezone() {
		return $this->get_option( 'timezone', 'wp' );
	}

	/**
	 * Set Timezone.
	 *
	 * @param string $newvalue – New value.
	 */
	public function set_timezone( $newvalue ) {
		$this->update_option( 'timezone', $newvalue );
	}

	/**
	 * Get Username Type.
	 *
	 * @return string
	 */
	public function get_type_username() {
		return $this->get_option( 'type_username', 'display_name' );
	}

	/**
	 * Set Username Type.
	 *
	 * @param string $newvalue – New value.
	 */
	public function set_type_username( $newvalue ) {
		$this->update_option( 'type_username', $newvalue );
	}

	/**
	 * Get number of child site events.
	 *
	 * @return integer
	 */
	public function get_child_site_events() {
		return $this->get_option( 'child_site_events', 100 );
	}

	/**
	 * Set number of child site events.
	 *
	 * @param integer $newvalue – New value.
	 */
	public function set_child_site_events( $newvalue ) {
		$this->update_option( 'child_site_events', $newvalue );
	}

	/**
	 * Get Events Frequency.
	 *
	 * @return integer
	 */
	public function get_events_frequency() {
		return $this->get_option( 'events_frequency', 3 );
	}

	/**
	 * Set Events Frequency.
	 *
	 * @param integer $newvalue – New value.
	 */
	public function set_events_frequency( $newvalue ) {
		$this->update_option( 'events_frequency', $newvalue );
	}

	/**
	 * Get Current User Roles.
	 *
	 * @param array $base_roles – Base roles.
	 * @return array
	 */
	public function get_current_user_roles( $base_roles = null ) {
		if ( null === $base_roles ) {
			$base_roles = wp_get_current_user()->roles;
		}
		if ( function_exists( 'is_super_admin' ) && is_super_admin() ) {
			$base_roles[] = 'superadmin';
		}
		return $base_roles;
	}

	/**
	 * Check if the user is super admin.
	 *
	 * @param string $username – Username.
	 * @return boolean
	 */
	public function is_login_super_admin( $username ) {
		$user_id = username_exists( $username );
		if ( function_exists( 'is_super_admin' ) && is_super_admin( $user_id ) ) {
			return true;
		} else {
			return false;
		}
	}

	/**
	 * Get Server IP.
	 *
	 * @return string
	 */
	public function get_server_ip() {
		$result = null;
		if ( isset( $_SERVER['SERVER_ADDR'] ) ) {
			$result = $this->normalize_ip( sanitize_text_field( wp_unslash( $_SERVER['SERVER_ADDR'] ) ) );
			if ( ! $this->validate_ip( $result ) ) {
				$result = 'Error ' . self::ERROR_CODE_INVALID_IP . ': Invalid IP Address';
			}
		}
		return $result;
	}

	/**
	 * Get Client IP.
	 *
	 * @return string
	 */
	public function get_main_client_ip() {
		$result = null;
		if ( isset( $_SERVER['REMOTE_ADDR'] ) ) {
			$result = $this->normalize_ip( sanitize_text_field( wp_unslash( $_SERVER['REMOTE_ADDR'] ) ) );
			if ( ! $this->validate_ip( $result ) ) {
				$result = 'Error ' . self::ERROR_CODE_INVALID_IP . ': Invalid IP Address';
			}
		}
		return $result;
	}

	/**
	 * Normalize IP Address.
	 *
	 * @param string $ip – IP Address.
	 * @return string
	 */
	protected function normalize_ip( $ip ) {
		$ip = trim( $ip );
		if ( strpos( $ip, ':' ) !== false && substr_count( $ip, '.' ) == 3 && strpos( $ip, '[' ) === false ) {
			// IPv4 with a port (eg: 11.22.33.44:80).
			$ip = explode( ':', $ip );
			$ip = $ip[0];
		} else {
			// IPv6 with a port (eg: [::1]:80).
			$ip = explode( ']', $ip );
			$ip = ltrim( $ip[0], '[' );
		}
		return $ip;
	}

	/**
	 * Validate IP Address.
	 *
	 * @param string $ip – IP Address.
	 * @return string
	 */
	protected function validate_ip( $ip ) {
		$opts        = FILTER_FLAG_IPV4 | FILTER_FLAG_IPV6;
		$filtered_ip = filter_var( $ip, FILTER_VALIDATE_IP, $opts );
		if ( ! $filtered_ip || empty( $filtered_ip ) ) {
			// Regex IPV4.
			if ( preg_match( '/^(([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]).){3}([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/', $ip ) ) {
				return $ip;
			} // Regex IPV6.
			elseif ( preg_match( '/^\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))(%.+)?\s*$/', $ip ) ) {
				return $ip;
			}
			return false;
		} else {
			return $filtered_ip;
		}
	}

	/**
	 * Search & Return MainWP site.
	 *
	 * @param string $column – Column name.
	 * @param string $value  – Column value.
	 * @return mixed
	 */
	public function get_mwp_site_by( $column = 'id', $value ) {
		// Get MainWP sites.
		$mwp_sites = $this->get_mwp_child_sites();

		// Search by column name.
		$key = array_search( $value, array_column( $mwp_sites, $column ), true );
		if ( false !== $key ) {
			return $mwp_sites[ $key ];
		}
		return false;
	}

	/**
	 * Get last checked timestamp by site id.
	 *
	 * @since 1.0.1
	 *
	 * @param integer $site_id - Site id.
	 * @return mixed
	 */
	public function get_last_checked_by_siteid( $site_id = 0 ) {
		if ( $site_id ) {
			return $this->get_option( 'mwpal_last_checked_site_' . $site_id );
		}
		return false;
	}

	/**
	 * Set last checked timestamp by site id.
	 *
	 * @since 1.0.1
	 *
	 * @param integer $site_id      - Site id.
	 * @param string  $last_checked - Last checked timestamp.
	 */
	public function set_last_checked_by_siteid( $site_id = 0, $last_checked ) {
		$activity_log = \WSAL\MainWPExtension\Activity_Log::get_instance();
		if ( $site_id ) {
			$this->update_option( 'mwpal_last_checked_site_' . $site_id, $last_checked );
		}
	}
}