<?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 database management.
 *
 * This class defines all code necessary to manage the database functionalities.
 *
 * @since      1.0.0
 * @package    Wp_Database_Tools
 * @subpackage Wp_Database_Tools/includes
 * @author     Raiola Networks <info@raiolanetworks.es>
 */
class Wp_Database_Tools_Database_Options extends Wp_Database_Tools_Database {

	/**
	 * All the information processed from the options
	 *
	 * @since    1.0.0
	 * @access   protected
	 * @var      array    $data    Options data.
	 */
	protected $data;

	/**
	 * The general data of database.
	 *
	 * @since    1.0.0
	 * @access   protected
	 * @var      array    $data    The general data of database.
	 */
	protected $count;

	/**
	 * Initialize the class.
	 *
	 * @since    1.0.0
	 *
	 * @param array  $plugins    Values plugins.
	 * @param array  $themes     Values themes.
	 * @param String $matching   Value of the source.
	 * @param String $license_status   Value of the source.
	 */
	public function __construct( $plugins, $themes, $matching, $license_status ) {
		$this->plugins        = $plugins;
		$this->themes         = $themes;
		$this->matching       = $matching;
		$this->license_status = $license_status;
		// Set total count.
		$this->check_count();
	}

	/**
	 * Sets the total number of records
	 *
	 * @since 1.0.0
	 */
	public function check_count() {
		global $wpdb;
		$num_rows    = $wpdb->get_var( 'SELECT COUNT(option_id) FROM ' . $wpdb->prefix . "options WHERE option_name NOT LIKE ('%\_transient\_%')" );
		$this->count = $num_rows;
	}

	/**
	 * Prepare data to loop over records
	 *
	 * @since 1.0.0
	 */
	private function prepare_data() {
		// Custom key.
		$this->key = 'options';
		// Limit to query.
		$this->limit = 1000;
		// Multiples origins.
		$this->is_multiple = false;
		// Loading ajax call.
		$this->current_loading = 0;
		// Prepare data.
		$this->full_data = parent::init_full_data();
		// API data.
		$this->api_data = parent::get_api_data( $this->key );
		// Data loop transient.
		$this->data_loop = parent::get_data_loop( $this->key );
		// Feedback.
		$this->feedback = parent::get_user_feedback( $this->key );
		// Cache files.
		$this->cache_data = parent::get_data_cache_indicator( $this->key );
		// Force scanner active.
		$this->force_execute_scanner = get_option( WPDBT_PREFIX . 'force_execute_scanner' );
		// Load dependencies.
		parent::load_dependencies_child( $this->key );
		// Set transient loading.
		parent::set_status_loading( 'loading', $this->current_loading, $this->data_loop, false );
	}

	/**
	 * Prepares the database data and applies the detection algorithm
	 *
	 * @since 1.0.0
	 */
	public function check_data() {

		// TODO: Better way, loop json encode.
		ini_set( 'memory_limit', '-1' );
		set_time_limit( 0 );

		$this->prepare_data();

		// Options data.
		global $wpdb;
		$rows = $wpdb->get_results( 'SELECT *, LENGTH(option_id) + LENGTH(option_value) + LENGTH(option_name) + LENGTH(autoload) as size FROM ' . $wpdb->prefix . "options WHERE option_name NOT LIKE ('%\_transient\_%') LIMIT " . $this->limit . ' OFFSET ' . $this->data_loop['offset'] );

		// Loading ajax call.
		$max_loading = count( $rows );

		// Count for cache.
		$sql     = $wpdb->prepare( 'SELECT SUM(%1s) AS sum_ids FROM %1s WHERE %1s NOT LIKE %s', 'option_id', $wpdb->prefix . 'options', 'option_name', '%_transient_%' );
		$sum_ids = $wpdb->get_results( $sql );
		$sum_ids = strval( $sum_ids[0]->sum_ids );

		// Count ids from cache.
		$sum_ids_cache = strval( array_sum( array_column( (array) $this->cache_data['source']['data'], 'id' ) ) );

		if (
			$sum_ids === $sum_ids_cache &&
			$this->cache_data['indicators']->api === strlen( wp_json_encode( $this->api_data['source'] ) ) &&
			$this->cache_data['indicators']->status === strlen( wp_json_encode( array( $this->feedback, $this->license_status ) ) )
		) {

			if ( ! empty( $this->cache_data['source'] ) && ! is_null( $this->cache_data['source'] ) ) {

				if ( $this->license_status ) {
					Wp_Database_Tools_Logger::info( 'OPTIONS: load data by cache' );
					// Set data loop (total).
					parent::set_data_loop( $this->limit, $this->data_loop['offset'], $this->count, $this->key );
					$this->data_loop = parent::get_data_loop( $this->key );
					$this->data      = parent::calculate_data_source_size( $this->cache_data['source'] );
					// Set status loading.
					parent::set_status_loading( 'success', 100, $this->data_loop, true );
					return;
				}
			}
		} elseif ( false === $this->data_loop['is_finish'] ) {

			// Count ids from cache.
			if ( isset( $this->cache_data['source']['data'] ) ) {
				$sum_ids_cache = strval( array_sum( array_column( $this->cache_data['source']['data'], 'id' ) ) );
				$sum_ids_cache = ( $this->cache_data['indicators']->ids < $sum_ids && $this->data_loop['loops'] !== 1 ) ? $sum_ids_cache + $this->cache_data['indicators']->ids : $sum_ids_cache;
			} elseif ( $this->cache_data['indicators']->ids > $sum_ids ) {
				$sum_ids_cache = 0;
			}

			parent::set_cache_indicators( $this->key, $this->api_data['source'], $this->feedback, $sum_ids_cache );
		}

		Wp_Database_Tools_Logger::info( 'OPTIONS: starting to process data' );

		// TODO: Pass cache management to other class
		$cache_path = plugin_dir_path( __DIR__ ) . 'data/cache/' . WPDBT_PREFIX . $this->key;
		// IF first loop reset cache file.
		if ( 0 === $this->data_loop['offset'] ) {
			$success_cache = file_put_contents( $cache_path . '_' . $this->key . '.json', wp_json_encode( mb_convert_encoding( array(), 'UTF-8' ) ) );
		}

		// Set data loop.
		parent::set_data_loop( $this->limit, $this->data_loop['offset'], $this->count, $this->key );
		// Get if finish.
		$this->data_loop = parent::get_data_loop( $this->key );

		Wp_Database_Tools_Logger::info( 'OPTIONS: ' . json_encode( $this->data_loop ) );

		// Si ha finalizado establecesmos la data.
		if ( true === $this->data_loop['is_finish'] ) {

			// Get cache.
			$this->cache_data['source'] = json_decode( file_get_contents( $cache_path . '_' . $this->key . '.json' ), true );

			Wp_Database_Tools_Logger::info( 'OPTIONS: ending to process data ' . count( $this->cache_data['source'] ) );

			// Get source data and calculate finihs size.
			$this->data = parent::calculate_data_source_size( $this->cache_data['source'] );

			// Set status loading.
			parent::set_status_loading( 'success', 100, $this->data_loop, false );

			// Reset values loop.
			parent::remove_data_loop( $this->key );

			return;

		}

		foreach ( $rows as $row_option ) {

			$option = new Wp_Database_Tools_Database_Data_Option( $row_option, $this->feedback );

			// sum size.
			$this->full_data['size']['total']['value'] += $option->get_size();
			if ( $option->get_autoload() == 'yes' ) {
				$this->full_data['size']['autoload']['value'] += $option->get_size();
			}

			$key_api_data = false;

			// If license is valid.
			if ( $this->license_status ) {

				// Prepare origin.
				if ( $this->api_data['source'] != null ) {
					$search_term  = ( $option->get_regex() !== false )
					? $option->get_regex()
					: $option->get_name();
					$key_api_data = array_keys( array_column( (array) $this->api_data['source'], 'name' ), $search_term );
				}

				// If key found.
				if ( false !== $key_api_data && ! empty( $key_api_data ) ) {

					// Check multiple only for verified registers.
					$key_api_data_verified = $key_api_data;
					foreach ( $key_api_data_verified as $index => $key ) {

						if ( $this->api_data['source'][ $key ]->verified !== 1 ) {
							unset( $key_api_data_verified[ $index ] );
						}
					}

					$this->is_multiple = count( $key_api_data_verified ) > 1;

					// Multiples values.
					if ( $this->is_multiple ) {

						$option->set_multiple( true );
						$option->origin = array();

						foreach ( $key_api_data_verified as $key ) {

							$api_data = parent::set_data_api(
								$this->api_data['source'][ $key ],
								$this->api_data['plugins'],
								$this->api_data['themes'],
								$this->api_data['cores'],
								$this->api_data['marketplaces'],
								$this->api_data['authors'],
								$this->key
							);

							$origin = new Wp_Database_Tools_Database_Data_Origin();
							$origin->set_origin_by_api( $api_data, $this->key );
							// Marketplace.
							$marketplace = $origin->get_marketplace();
							$origin->set_marketplace( $marketplace->return_object_vars() );
							// Auhor.
							$author = $origin->get_author();
							$origin->set_author( $author->return_object_vars() );
							// Origin.
							$origin->set_status( $this->plugins, $this->themes );
							$origin->set_question( $option->get_name() );
							$this->full_data['origins'] = $origin->check_choices( $this->full_data['origins'] );
							array_push( $option->origin, $origin->return_object_vars() );
						}

						// Simple values.
					} else {

						$this->is_multiple = false;

						$key_api_data = $key_api_data[0];
						$api_data     = parent::set_data_api(
							$this->api_data['source'][ $key_api_data ],
							$this->api_data['plugins'],
							$this->api_data['themes'],
							$this->api_data['cores'],
							$this->api_data['marketplaces'],
							$this->api_data['authors'],
							$this->key
						);

						$option->origin->set_origin_by_api( $api_data, $this->key );
						$option->origin->set_question( $option->get_name() );
						$option->origin->set_status( $this->plugins, $this->themes );
					}
				} else {

					$this->is_multiple = false;

					if ( 'NO' === $this->force_execute_scanner && false === $option->get_regex() ) {

						$data_algorithm = $option->get_matching_data( $this->matching, $this->plugins, $this->themes, $option->get_name() );

						if ( ! is_null( $data_algorithm ) ) {
							$option->set_data_by_algorithm( $data_algorithm );
							$option->origin->set_status( $this->plugins, $this->themes );
						}
					}
				}
			}

			if ( ! $this->is_multiple ) {

				$this->full_data['origins'] = $option->origin->check_choices( $this->full_data['origins'] );
				// Marketplace.
				$marketplace = $option->origin->get_marketplace();
				$option->origin->set_marketplace( $marketplace->return_object_vars() );
				// Auhor.
				$author = $option->origin->get_author();
				$option->origin->set_author( $author->return_object_vars() );
				// Origin.
				$option->set_origin( $option->origin->return_object_vars() );
			}

			$option_array = $option->return_object_vars( $option );

			// Prevent encoding.
			if ( ! mb_check_encoding( $option_array ) ) {
				Wp_Database_Tools_Logger::error( 'OPTIONS: error encoding ' . $option_array['name'] );
				continue;
			}

			if ( is_array( $option_array ) ) {
				array_push( $this->full_data['data'], $option_array );
			} else {
				Wp_Database_Tools_Logger::error( 'OPTIONS: error add ' . $option_array['name'] );
				continue;
			}

			parent::set_status_loading( 'loading', 100 * $this->current_loading / $max_loading, $this->data_loop, false );
			$this->current_loading++;

			// Memory optimization.
			unset( $row_option );

		}

		$this->full_data['plugins'] = $this->plugins;
		$this->full_data['themes']  = $this->themes;

		// If it is finished we establish the data.
		if ( false === $this->data_loop['is_finish'] ) {
			// Get cache data.
			$current_cache = json_decode( file_get_contents( $cache_path . '_' . $this->key . '.json' ), true );
			// Encoding current data.
			$new_cache = $this->full_data;

			if ( ! isset( $new_cache['data'] ) ) {
				Wp_Database_Tools_Logger::error( 'OPTIONS: error data new cache not found' );
			}

			if ( ! isset( $current_cache['data'] ) ) {
				Wp_Database_Tools_Logger::error( 'OPTIONS: error data current cache not found' );
			}

			if ( mb_check_encoding( $this->full_data ) ) {

				Wp_Database_Tools_Logger::info( 'OPTIONS: available encoding' );

				try {
					$new_cache = mb_convert_encoding( $this->full_data, 'UTF-8' );
				} catch ( Exception $e ) {
					$new_cache = $this->full_data;
					Wp_Database_Tools_Logger::error( 'OPTIONS: the data cache has not been encoded properly' );
				}

				if ( $new_cache === null || ! isset( $new_cache['data'] ) ) {
					Wp_Database_Tools_Logger::error( 'OPTIONS: the data cache has not been encoded properly' );
					$new_cache = $this->full_data;
				}
			}

			if ( ! isset( $new_cache['data'] ) ) {
				Wp_Database_Tools_Logger::error( 'OPTIONS: error data new cache after encoding' );
			}

			if ( ! isset( $current_cache['data'] ) ) {
				Wp_Database_Tools_Logger::error( 'OPTIONS: error data current cache after encoding' );
			}

			// Merge data.
			$current_cache = array_merge_recursive( $current_cache, $new_cache );

			if ( ! isset( $current_cache['data'] ) ) {
				Wp_Database_Tools_Logger::error( 'OPTIONS: error merge options data' );
			}

			// Save data cache.
			$current_cache = wp_json_encode( $current_cache );
			$save_cache    = file_put_contents( $cache_path . '_' . $this->key . '.json', $current_cache );

			if ( false === $save_cache ) {
				Wp_Database_Tools_Logger::error( 'OPTIONS: error save json' );
			}
		}

		// Loading status.
		parent::set_status_loading( 'loading', 0, $this->data_loop, false );

		// Memory optimization.
		unset( $this->full_data );
		unset( $this->api_data );
		unset( $this->cache_data );
		unset( $new_cache );
		unset( $current_cache );
		gc_collect_cycles();
	}

	/**
	 * Call a specific method depending on the action to be performed.
	 *
	 * @since 1.0.0
	 */
	public function action_form() {
		// TODO: nonce verification.
		switch ( $_POST['action-type'] ) {
			case 'delete':
				$this->delete();
				break;
			case 'edit':
				$this->edit();
				break;
		}

		wp_redirect( $_POST['current-url'] . '&' . WPDBT_PREFIX . 'notice=options' );
	}

	/**
	 * Deletes the records that are indicated in $POST through keys.
	 * These keys are used in a query. The result is stored in a transient,
	 * which is then returned as a warning to the user..
	 *
	 * @since 1.0.0
	 */
	public function delete() {
		// TODO: nonce verification.
		$action_keys = $_POST['action-keys'];
		$action_keys = explode( '↕', $action_keys );

		$errors_messages         = '';
		$successes_messages      = '';
		$options_array_successes = array();
		$options_array_errors    = array();

		foreach ( $action_keys as $option_key ) {
			$option_delete = delete_option( $option_key );

			if ( $option_delete === true ) {
				array_push( $options_array_successes, $option_key );
			} else {
				array_push( $options_array_errors, $option_key );
			}
		}

		if ( ! empty( $options_array_successes ) ) {
			$successes_messages .= parent::generate_message_success( 'options', 'option_names', $options_array_successes, __( 'removed', 'wp-database-tools' ) );
			set_transient( WPDBT_PREFIX . 'successes', $successes_messages );
		}

		if ( ! empty( $options_array_errors ) ) {
			$errors_messages .= parent::generate_message_error( 'options', 'option_names', $options_array_errors, __( 'removed', 'wp-database-tools' ) );
			set_transient( WPDBT_PREFIX . 'errors', $errors_messages );
		}

		parent::set_cache_indicators( 'options', 0, 0, 0 );

	}

	/**
	 * Edit the records that are indicated in $POST through keys.
	 * These keys are used in a query. The result is stored in a transient,
	 * which is then returned as a warning to the user..
	 *
	 * @since 1.0.0
	 */
	public function edit() {
		// TODO: nonce verification.
		$action_keys = $_POST['action-keys'];
		$action_keys = explode( '↕', $action_keys );
		$autoload    = $_POST['autoload'];

		$errors_messages         = '';
		$successes_messages      = '';
		$options_array_successes = array();
		$options_array_errors    = array();

		foreach ( $action_keys as $option_key ) {

			global $wpdb;
			$table_name = $wpdb->prefix . 'options';
			$sql        = $wpdb->prepare( 'UPDATE %1s SET autoload = %s WHERE option_name LIKE %s', $table_name, $autoload, $option_key );
			$resuls     = $wpdb->get_results( $sql );

			if ( ! empty( $resuls ) ) {
				array_push( $options_array_errors, $option_key );
			} else {
				array_push( $options_array_successes, $option_key );
			}
		}

		if ( ! empty( $options_array_successes ) ) {
			$successes_messages .= parent::generate_message_success( 'options', 'option_names', $options_array_successes, __( 'edited', 'wp-database-tools' ) );
			set_transient( WPDBT_PREFIX . 'successes', $successes_messages );
		}

		if ( ! empty( $options_array_errors ) ) {
			$errors_messages .= parent::generate_message_error( 'options', 'option_names', $options_array_errors, __( 'edited', 'wp-database-tools' ) );
			set_transient( WPDBT_PREFIX . 'errors', $errors_messages );
		}

		parent::set_cache_indicators( 'options', 0, 0, 0 );

	}


	/**
	 * The array of data of general database.
	 *
	 * @since     1.0.0
	 * @return    array    The array of data.
	 */
	public function get_data() {
		$count_data = is_array( $this->data ) ? count( $this->data['data'] ) : 'null';
		Wp_Database_Tools_Logger::info( 'OPTIONS: return data ' . $count_data );
		return $this->data;
	}

	/**
	 * The array of data of general database.
	 *
	 * @since     1.0.0
	 * @return    array    The array of data.
	 */
	public function get_count() {
		return $this->count;
	}
}