<?php
/**
 * Database functions
 *
 * @link       https://raiolanetworks.es
 * @since      1.0.0
 *
 * @package    Wp_Database_Tools
 * @subpackage Wp_Database_Tools/includes
 */

/**
 * Contains the functionalities related to find match.
 *
 * This class defines all features of the matching algorith.
 *
 * @since      1.0.0
 * @package    Wp_Database_Tools
 * @subpackage Wp_Database_Tools/includes
 * @author     Raiola Networks <info@raiolanetworks.es>
 */
class Wp_Database_Tools_Matching {

	/**
	 * The information of the plugins formatted
	 *
	 * @since    1.0.0
	 * @access   protected
	 * @var      array    $plugins    The plugins data.
	 */
	protected $plugins;

	/**
	 * The information of the themes formatted
	 *
	 * @since    1.0.0
	 * @access   protected
	 * @var      array    $themes    The themes data.
	 */
	protected $themes;

	/**
	 * Constructor
	 *
	 * Create the instance of a Matching.
	 *
	 * @access public
	 * @since 1.0.0
	 *
	 * @param Wp_Database_Tools_Plugins $plugins   Plugin Obj.
	 * @param Wp_Database_Tools_Themes  $themes    Theme Obj.
	 */
	public function __construct( $plugins, $themes ) {
		$this->plugins = $plugins->get_plugins();
		$this->themes  = $themes->get_themes();
	}

	/**
	 * Searches for possible matches of origins and returns matches
	 * sorted by the level of probability of a match.
	 *
	 * @access public
	 * @since 1.0.0
	 *
	 * @param String $type           Values plugin|theme.
	 * @param String $source_name    Name of the source.
	 * @param String $source_value   Value of the source.
	 *
	 * @return    Array    match found.
	 */
	public function find_match( $type, $source_name, $source_value ) {

		$MATCHING_LVL = 100;

		if ( 'plugin' === $type ) {
			$search_origin      = $this->plugins;
			$search_text_domain = true;
		}

		if ( 'theme' === $type ) {
			$search_origin      = $this->themes;
			$search_text_domain = false;
		}

		$concidences_slugs = array();

		// We go through all possible sources (plugins or themes) looking for matches.
		foreach ( $search_origin as $key => $origin ) {

			// Porcent match.
			$match_results = array();

			// Text Domain.
			if ( $search_text_domain === true ) {

				$text_domain = $origin['text_domain'];

				$match = $this->search_by_text_domain( $text_domain, $source_name );
				array_push( $match_results, $match );

			}

			// Slugs.
			$slug = $origin['slug'];
			$name = $origin['name'];

			if ( $source_value !== null ) {

				if ( str_contains( $source_name, 'edd_' ) ) {
					$match = $this->search_by_value( $slug, $name, $source_value );
					array_push( $match_results, $match );
				}
			}

			$match = $this->search_by_text_slug( $slug, $source_name );
			array_push( $match_results, $match );

			// Initials.
			$initials = $origin['initials'];

			if ( strlen( $initials ) >= 3 && strlen( $initials ) <= 5 ) {

				$match = $this->search_by_starts_initials( $initials, $source_name );
				array_push( $match_results, $match );

				if ( str_contains( $slug, 'premium' ) || str_contains( $slug, 'pro' ) ) {

					if ( substr( $initials, -1 ) == 'p' ) {

						$match = $this->search_by_starts_initials_without_last( $initials, $source_name );
						array_push( $match_results, $match );

					}
				}

				$match = $this->search_by_starts_initials_similar( $initials, $source_name );
				array_push( $match_results, $match );

			}

			$match = $this->search_by_similar_slug( $slug, $source_name );
			array_push( $match_results, $match );

			// Search main file.
			if ( isset( $origin['path'] ) ) {

				$path  = $origin['path'];
				$match = $this->search_main_file( $path, $source_name, $initials );
				array_push( $match_results, $match );

			}

			// Order array.
			asort( $match_results );

			$concidences_slugs[ $slug ] = end( $match_results );

			unset( $origin );
		}

		// Order array.
		asort( $concidences_slugs );

		// Get value if the match if hightest.
		if ( end( $concidences_slugs ) >= $MATCHING_LVL ) {

			$data_return = array(
				'slug'  => array_key_last( $concidences_slugs ),
				'match' => end( $concidences_slugs ),
			);

			return $data_return;

		}

		return null;

	}

	/**
	 * Return longest char match between two strings
	 *
	 * @access protected
	 * @since 1.0.0
	 *
	 * @param String $str1    First string to compare.
	 * @param String $str2    Second string to compare.
	 *
	 * @return    int    longest match.
	 */
	protected function get_longest_matching_substring( $str1, $str2 ) {
		$len_1   = strlen( $str1 );
		$longest = '';
		for ( $i = 0; $i < $len_1; $i++ ) {
			for ( $j = $len_1 - $i; $j > 0; $j-- ) {
				$sub = substr( $str1, $i, $j );
				if ( strpos( $str2, $sub ) !== false && strlen( $sub ) > strlen( $longest ) ) {
					$longest = $sub;
					break;
				}
			}
		}
		return strlen( $longest );
	}

	/**
	 * Compare the slug of the plugin or theme with the name of the source
	 * (options, cronjobs...) to find a match.
	 *
	 * The comparison is done by looking for an exact match of the same string
	 * at its beginning.
	 *
	 * @access protected
	 * @since 1.0.0
	 *
	 * @param String $slug         Slug of origin.
	 * @param String $source_name  Name of the source.
	 *
	 * @return    int    longest match.
	 */
	protected function search_by_similar_slug( $slug, $source_name ) {

		$slug_name = preg_split( '/-|_/', $slug );

		$source_name = str_replace( array( '_', '-' ), '_', $source_name );
		$match       = 0;

		foreach ( $slug_name as $key => $slug ) {

			if ( $key == 0 ) {
				$slug_search = $slug_name[0] . '_';
			}
			if ( $key == 1 ) {
				$slug_search = $slug_name[0] . '_' . $slug_name[1] . '_';
			}
			if ( $key == 2 ) {
				$slug_search = $slug_name[0] . '_' . $slug_name[1] . '_' . $slug_name[2] . '_';
			}

			$slug_length = strlen( $slug_search );

			if ( str_starts_with( $source_name, $slug_search ) && $slug_length > 3 ) {
				$match += $slug_length + 100;
			}
		}

		return $match;

	}

	/**
	 * Compare the slug of the plugin or theme with the name of the source
	 * (options, cronjobs...) to find a match.
	 *
	 * The comparison is made on the basis of the highest coincidence between
	 * the achievement of their chars.
	 *
	 * @access protected
	 * @since 1.0.0
	 *
	 * @param String $slug         Slug of origin.
	 * @param String $source_name  Name of the source.
	 *
	 * @return    int    longest match.
	 */
	protected function search_by_text_slug( $slug, $source_name ) {
		$slug        = str_replace( array( '_', '-' ), '', $slug );
		$source_name = str_replace( array( '_', '-' ), '', $source_name );
		$slug        = strtolower( $slug );
		$source_name = strtolower( $source_name );
		$slug_length = strlen( $slug );
		$result      = $this->get_longest_matching_substring( $slug, $source_name );
		$match       = ( $result * 100 ) / $slug_length;
		$match      += $slug_length;
		return $match;
	}

	/**
	 * Compare text_domain slug of the plugin or theme with the name of the source
	 * (options, cronjobs...) to find a match.
	 *
	 * The comparison is made on the basis of the highest coincidence between
	 * the achievement of their chars.
	 *
	 * @access protected
	 * @since 1.0.0
	 *
	 * @param String $text_domain  Slug of origin.
	 * @param String $source_name  Name of the source.
	 *
	 * @return    int    match.
	 */
	protected function search_by_text_domain( $text_domain, $source_name ) {
		$text_domain        = str_replace( array( '_', '-' ), '', $text_domain );
		$source_name        = str_replace( array( '_', '-' ), '', $source_name );
		$text_domain        = strtolower( $text_domain );
		$source_name        = strtolower( $source_name );
		$text_domain_length = strlen( $text_domain );
		$result             = $this->get_longest_matching_substring( $text_domain, $source_name );
		$match              = ( $result * 100 ) / $text_domain_length;
		$match             += $text_domain_length;
		return $match;
	}

	/**
	 * Compare initials of the plugin or theme with the name of the source
	 * (options, cronjobs...) to find a match.
	 *
	 * @access protected
	 * @since 1.0.0
	 *
	 * @param String $initials     Initials of origin.
	 * @param String $source_name  Name of the source.
	 *
	 * @return    int    match.
	 */
	protected function search_by_starts_initials( $initials, $source_name ) {

		$source_name = preg_split( '/-|_/', $source_name );

		if ( count( $source_name ) > 1 ) {
			$start_name = $source_name[0];
			$match      = ( $start_name === $initials ) ? 100 : 0;
			return $match;
		}

		return 0;

	}

	/**
	 * Compare initials of the plugin or theme with the name of the source
	 * (options, cronjobs...) to find a match.
	 *
	 * We search by initials omitting the last character.
	 * This is checked to avoid comparisons with words
	 * like "pro" or "lite" at the end.
	 *
	 * @access protected
	 * @since 1.0.0
	 *
	 * @param String $initials     Initials of origin.
	 * @param String $source_name  Name of the source.
	 *
	 * @return    int    match.
	 */
	protected function search_by_starts_initials_without_last( $initials, $source_name ) {

		$source_name = preg_split( '/-|_/', $source_name );

		if ( count( $source_name ) > 1 ) {
			$start_name = $source_name[0];
			$match      = ( $start_name == substr_replace( $initials, '', -1 ) ) ? 100 : 0;
			return $match;
		}

		return 0;

	}


	/**
	 * Compare initials of the plugin or theme with the name of the source
	 * (options, cronjobs...) to find a match.
	 *
	 * We compare the similarity of the initials
	 *
	 * @access protected
	 * @since 1.0.0
	 *
	 * @param String $initials     Initials of origin.
	 * @param String $source_name  Name of the source.
	 *
	 * @return    int    match.
	 */
	protected function search_by_starts_initials_similar( $initials, $source_name ) {

		$initials    = strtolower( $initials );
		$source_name = strtolower( $source_name );
		$source_name = preg_split( '/-|_/', $source_name );

		if ( count( $source_name ) > 1 ) {
			$start_name = $source_name[0];
			similar_text( $initials, $start_name, $match );
			return $match;
		}

		return 0;

	}

	/**
	 * We look for matches in the value of the origins (options,tables,cronjobs)
	 * by comparing with the slug and name of the source (themes,plugins).
	 *
	 * @access protected
	 * @since 1.0.0
	 *
	 * @param String $slug          Initials of origin.
	 * @param String $name          Name of the source.
	 * @param String $source_value  Name of the source.
	 *
	 * @return    int    match.
	 */
	protected function search_by_value( $slug, $name, $source_value ) {

		$content = strtolower( $source_value );

		if ( str_contains( $content, strtolower( $slug ) ) ) {
			return 100;
		}

		if ( str_contains( $content, strtolower( $name ) ) ) {
			return 100;
		}

		return 0;

	}

	/**
	 * We look for matches in the origins file (themes,plugins)
	 * comparing with the value of the sources (cronjobs,options,tables).
	 *
	 * @access protected
	 * @since 1.0.0
	 *
	 * @param String $path          The file path.
	 * @param String $source_name   Name of the source.
	 * @param String $initials      Initials of the source.
	 *
	 * @return    int    match.
	 */
	protected function search_main_file( $path, $source_name, $initials ) {

		$prefix_source = preg_split( '/-|_/', $source_name );

		if ( count( $prefix_source ) > 1 ) {

			if ( $prefix_source[0] != 'edd' ) {

				if ( strlen( $prefix_source[0] ) >= 3 ) {

					$content = strtolower( file_get_contents( WP_PLUGIN_DIR . '/' . $path ) );
					$regex   = '/("|\')' . $prefix_source[0] . '(_|-)/i';

					// Search on main file.
					preg_match( $regex, $content, $concidences );

					if ( count( $concidences ) > 0 ) {

						similar_text( $concidences[0], $prefix_source[0], $percent );

						if ( $percent >= 80 ) {
							return intval( $percent );
						}

						similar_text( $concidences[0], $initials, $percent );

						if ( $percent >= 80 ) {
							return intval( $percent );
						}

						return 0;
					}
				}
			}
		}

		return 0;

	}

}