<?php

namespace WPForms\Pro\Admin\Entries\Export;

/**
 * Entries Export.
 *
 * @since 1.5.5
 */
class Export {

	/**
	 * ActionScheduler task name for cleaning up orphaned export files.
	 *
	 * @since 1.6.5
	 */
	const TASK_CLEANUP = 'wpforms_pro_admin_entries_export_remove_old_export_files';

	/**
	 * Configuration.
	 *
	 * @since 1.5.5
	 *
	 * @var array
	 */
	public $configuration = [
		'request_data_ttl'     => DAY_IN_SECONDS, // Export request and a temp file TTL value.
		'entries_per_step'     => 5000,           // Number of entries in a chunk that are retrieved and saved into a temp file per one iteration.
		'csv_export_separator' => ',',            // Columns separator.
		'disallowed_fields'    => [               // Disallowed fields array.
			'captcha',
			'entry-preview',
			'divider',
			'html',
			'pagebreak',
			'internal-information',
			'content',
			'layout',
			'repeater',
		],
	];

	/**
	 * Translatable strings for JS responses.
	 *
	 * @since 1.5.5
	 *
	 * @var array
	 */
	public $i18n = [];

	/**
	 * Error messages.
	 *
	 * @since 1.5.5
	 *
	 * @var array
	 */
	public $errors = [];

	/**
	 * Additional Information checkboxes.
	 *
	 * @since 1.5.5
	 *
	 * @var array
	 */
	public $additional_info_fields = [];

	/**
	 * Type checkboxes.
	 *
	 * @since 1.6.5
	 *
	 * @var array
	 */
	public $export_options_fields = [];

	/**
	 * Array for store/read some data.
	 *
	 * @since 1.5.5
	 *
	 * @var array
	 */
	public $data = [];

	/**
	 * Instance of Admin Object.
	 *
	 * @since 1.5.5
	 *
	 * @var Admin
	 */
	public $admin;

	/**
	 * Instance of Ajax Object.
	 *
	 * @since 1.5.5
	 *
	 * @var Ajax
	 */
	public $ajax;

	/**
	 * Instance of File Object.
	 *
	 * @since 1.5.5
	 *
	 * @var File
	 */
	public $file;

	/**
	 * Initialize.
	 *
	 * @since 1.6.1
	 */
	public function init() {

		if ( ! wpforms_current_user_can( 'view_entries' ) && ! wp_doing_cron() ) {
			return;
		}

		if (
			! $this->is_entries_export_ajax() &&
			! wpforms_is_admin_page( 'tools' ) &&
			! wp_doing_cron()
		) {
			return;
		}

		$this->hooks();
		$this->init_args();
		$this->init_settings();
		$this->init_form_data();

		$this->admin = new Admin( $this );
		$this->file  = new File( $this );
		$this->ajax  = new Ajax( $this );
	}

	/**
	 * Init data.
	 *
	 * @since 1.5.5
	 */
	protected function init_settings() {

		// Additional information fields.
		$this->additional_info_fields = [
			'entry_id'   => esc_html__( 'Entry ID', 'wpforms' ),
			'date'       => esc_html__( 'Entry Date', 'wpforms' ),
			'notes'      => esc_html__( 'Entry Notes', 'wpforms' ),
			'status'     => esc_html__( 'Type', 'wpforms' ),
			'viewed'     => esc_html__( 'Viewed', 'wpforms' ),
			'starred'    => esc_html__( 'Starred', 'wpforms' ),
			'user_agent' => esc_html__( 'User Agent', 'wpforms' ),
			'ip_address' => esc_html__( 'User IP', 'wpforms' ),
			'user_uuid'  => esc_html__( 'Unique Generated User ID', 'wpforms' ),
			'pstatus'    => esc_html__( 'Payment Status', 'wpforms' ),
			'pginfo'     => esc_html__( 'Payment Gateway Information', 'wpforms' ),
			'del_fields' => esc_html__( 'Include data of previously deleted fields', 'wpforms' ),
		];

		if ( wpforms_is_addon_initialized( 'geolocation' ) ) {
			$this->additional_info_fields['geodata'] = esc_html__( 'Geolocation Details', 'wpforms' );
		}

		/**
		 * Additional information fields for entries export.
		 *
		 * @since 1.5.5.1
		 *
		 * @param array $fields Additional info fields.
		 */
		$this->additional_info_fields = apply_filters(
			'wpforms_pro_admin_entries_export_additional_info_fields',
			$this->additional_info_fields
		);

		// This option should be available only if zip PHP extension is loaded.
		if ( class_exists( 'ZipArchive' ) ) {
			$this->export_options_fields['xlsx'] = esc_html__( 'Export in Microsoft Excel (.xlsx)', 'wpforms' );
		}

		$this->export_options_fields['dynamic_columns'] = esc_html__( 'Separate dynamic choices into individual columns', 'wpforms' );

		// Export options fields.
		$this->export_options_fields = apply_filters(
			'wpforms_pro_admin_entries_export_options_fields',
			$this->export_options_fields
		);

		// Error strings.
		$this->errors = [
			'common'                     => esc_html__( 'There were problems while preparing your export file. Please recheck export settings and try again.', 'wpforms' ),
			'security'                   => esc_html__( 'You don\'t have enough capabilities to complete this request.', 'wpforms' ),
			'unknown_form_id'            => esc_html__( 'Incorrect form ID has been specified.', 'wpforms' ),
			'unknown_entry_id'           => esc_html__( 'Incorrect entry ID has been specified.', 'wpforms' ),
			'form_data'                  => esc_html__( 'Specified form seems to be broken.', 'wpforms' ),
			'unknown_request'            => esc_html__( 'Unknown request.', 'wpforms' ),
			'file_not_readable'          => esc_html__( 'Export file cannot be retrieved from a file system.', 'wpforms' ),
			'file_empty'                 => esc_html__( 'Export file is empty.', 'wpforms' ),
			'form_empty'                 => esc_html__( 'The form does not have any fields for export.', 'wpforms' ),
			'file_system_not_configured' => esc_html__( 'File system is not configured.', 'wpforms' ),
		];

		// Strings to localize.
		$this->i18n = [
			'error_prefix'      => $this->errors['common'],
			'error_form_empty'  => $this->errors['form_empty'],
			'label_select_all'  => esc_html__( 'Select All', 'wpforms' ),
			'prc_1_filtering'   => esc_html__( 'Generating a list of entries according to your filters.', 'wpforms' ),
			'prc_1_please_wait' => esc_html__( 'This can take a while. Please wait.', 'wpforms' ),
			'prc_2_no_entries'  => esc_html__( 'No entries found after applying your filters.', 'wpforms' ),
			'prc_3_done'        => esc_html__( 'The file was generated successfully.', 'wpforms' ),
			'prc_3_download'    => esc_html__( 'If the download does not start automatically', 'wpforms' ),
			'prc_3_click_here'  => esc_html__( 'click here', 'wpforms' ),
		];

		// Keeping default configuration data.
		$default_configuration = $this->configuration;

		// Applying deprecated filters.
		if ( has_filter( 'wpforms_export_fields_allowed' ) ) {

			// We need this because otherwise files can't be downloaded due to 'filter deprecated' notice.
			// Notice will be shown only on the WPForms > Tools > Export page.
			if (
				'wpforms_tools_entries_export_download' === $this->data['get_args']['action'] ||
				'wpforms_tools_single_entry_export_download' === $this->data['get_args']['action']
			) {
				ini_set( 'display_errors', 0 ); // phpcs:ignore
			}

			require_once WPFORMS_PLUGIN_DIR . 'pro/includes/admin/entries/class-entries-export.php';
			$old_export = new \WPForms_Entries_Export();

			$all_fields     = $old_export->all_fields();
			$allowed_fields = $old_export->allowed_fields();

			$disallowed_fields = array_diff( $all_fields, $allowed_fields );

			$this->configuration['disallowed_fields'] = array_unique( array_merge( $this->configuration['disallowed_fields'], $disallowed_fields ) );
		}

		if ( has_filter( 'wpforms_csv_export_separator' ) ) {
			if (
				'wpforms_tools_entries_export_download' === $this->data['get_args']['action'] ||
				'wpforms_tools_single_entry_export_download' === $this->data['get_args']['action']
			) {
				ini_set( 'display_errors', 0 ); // phpcs:ignore
			}

			$this->configuration['csv_export_separator'] = (string) apply_filters_deprecated(
				'wpforms_csv_export_separator',
				[ $this->configuration['csv_export_separator'] ],
				'1.5.5 of the WPForms plugin',
				'wpforms_pro_admin_entries_export_configuration'
			);
		}

		// Apply filter to config parameters.
		$this->configuration = (array) apply_filters( 'wpforms_pro_admin_entries_export_configuration', $this->configuration );

		$this->configuration['disallowed_fields'] = (array) $this->configuration['disallowed_fields'];

		$this->configuration = wp_parse_args( $this->configuration, $default_configuration );
	}

	/**
	 * Get localized data.
	 *
	 * @since 1.5.5
	 */
	public function get_localized_data() {

		return [
			'nonce'       => wp_create_nonce( 'wpforms-tools-entries-export-nonce' ),
			'lang_code'   => sanitize_key( wpforms_get_language_code() ),
			'export_page' => esc_url( admin_url( 'admin.php?page=wpforms-tools&view=export' ) ),
			'i18n'        => $this->i18n,
			'form_id'     => ! empty( $this->data['form_data'] ) ? $this->data['get_args']['form_id'] : 0,
			'dates'       => $this->data['get_args']['dates'],
		];
	}

	/**
	 * Init hooks.
	 *
	 * @since 1.8.5
	 */
	private function hooks() {

		add_filter( 'wpforms_pro_admin_entries_export_form_data', [ $this, 'filter_form_data' ] );
	}

	/**
	 * Init GET or POST args.
	 *
	 * @since 1.5.5
	 *
	 * @param string $method GET|POST.
	 */
	public function init_args( $method = 'GET' ) {

		$args = [];

		$method = $method === 'GET' ? 'GET' : 'POST';
		$req    = $method === 'GET' ? $_GET : $_POST; // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing

		// Action.
		$args['action'] = '';

		if ( ! empty( $req['action'] ) ) {
			$args['action'] = sanitize_text_field( wp_unslash( $req['action'] ) );
		}

		// Nonce.
		$args['nonce'] = '';

		if ( ! empty( $req['nonce'] ) ) {
			$args['nonce'] = sanitize_text_field( wp_unslash( $req['nonce'] ) );
		}

		// Form ID.
		$args['form_id'] = 0;

		if ( ! empty( $req['form'] ) ) {
			$args['form_id'] = (int) $req['form'];
		}

		// Entry ID.
		$args['entry_id'] = 0;

		if ( ! empty( $req['entry_id'] ) ) {
			$args['entry_id'] = (int) $req['entry_id'];
		}

		// Fields.
		$args['fields'] = [];

		if ( ! empty( $req['fields'] ) ) {
			$args['fields'] = array_map( 'intval', wp_unslash( $req['fields'] ) );
		}

		// Additional Information.
		$args['additional_info'] = [];

		if ( ! empty( $req['additional_info'] ) ) {
			$args['additional_info'] = array_map( 'sanitize_text_field', wp_unslash( $req['additional_info'] ) );
		}

		// Export Options Information.
		$args['export_options'] = [];

		if ( ! empty( $req['export_options'] ) ) {
			$args['export_options'] = array_map( 'sanitize_text_field', wp_unslash( $req['export_options'] ) );
		}

		// Date range.
		$args['dates'] = [];

		if ( ! empty( $req['date'] ) ) {
			$dates = explode( ' - ', sanitize_text_field( wp_unslash( $req['date'] ) ) );

			switch ( count( $dates ) ) {
				case 1:
					$args['dates'] = sanitize_text_field( $req['date'] );
					break;

				case 2:
					$args['dates'] = array_map( 'sanitize_text_field', $dates );
					break;
			}
		}

		// Entry statuses.
		$args['status'] = [];

		if ( ! empty( $req['statuses'] ) ) {
			$args['status'] = array_map(
				static function ( $status ) {

					$status = sanitize_key( wp_unslash( $status ) );

					return $status === 'published' ? '' : $status; // published is empty string in the database.
				},
				$req['statuses']
			);
		}

		// Search.
		$args['search'] = [
			'field'      => 'any',
			'comparison' => 'contains',
			'term'       => '',
		];

		if ( isset( $req['search'] ) ) {
			if ( isset( $req['search']['field'] ) ) {
				$args['search']['field'] = sanitize_key( $req['search']['field'] );
			}
			if ( ! empty( $req['search']['comparison'] ) ) {
				$args['search']['comparison'] = sanitize_key( $req['search']['comparison'] );
			}
			if ( ! empty( $req['search']['term'] ) ) {
				$args['search']['term'] = sanitize_text_field( $req['search']['term'] );
			}
		}

		// Request ID.
		$args['request_id'] = '';

		if ( ! empty( $req['request_id'] ) ) {
			$args['request_id'] = sanitize_text_field( wp_unslash( $req['request_id'] ) );
		}

		$this->data[ strtolower( $method ) . '_args' ] = $args;
	}

	/**
	 * Init selected form data.
	 *
	 * @since 1.5.5
	 */
	protected function init_form_data() {

		$form = wpforms()->obj( 'form' );
		$data = $form ?
			$form->get(
				$this->data['get_args']['form_id'],
				[
					'content_only' => true,
					'cap'          => 'view_entries_form_single',
				]
			) :
			[];

		/**
		 * Filter entries during form data init.
		 *
		 * @since 1.8.2
		 *
		 * @param array $form_data Form data.
		 */
		$this->data['form_data'] = apply_filters(
			'wpforms_pro_admin_entries_export_form_data',
			$data
		);
	}

	/**
	 * Filter form data.
	 *
	 * @since 1.8.5
	 *
	 * @param array $form_data Form data.
	 *
	 * @return array
	 */
	public function filter_form_data( $form_data ) {

		$fields = isset( $form_data['fields'] ) ? $form_data['fields'] : [];

		if ( empty( $fields ) ) {
			return $form_data;
		}

		$disallowed_fields = $this->configuration['disallowed_fields'];
		$payment_fields    = wpforms_get_payments_fields();

		// Remove disallowed fields.
		$allowed_fields = array_filter(
			$fields,
			static function ( $field ) use ( $disallowed_fields ) {

				return ! in_array( $field['type'], $disallowed_fields, true );
			}
		);

		// Retrieve payment fields.
		$form_payment_fields = array_filter(
			$allowed_fields,
			static function ( $field ) use ( $payment_fields ) {

				return in_array( $field['type'], $payment_fields, true );
			}
		);

		// Remove payment fields.
		$allowed_fields = array_filter(
			$allowed_fields,
			static function ( $field ) use ( $payment_fields ) {

				return ! in_array( $field['type'], $payment_fields, true );
			}
		);

		$form_data['fields']         = $allowed_fields;
		$form_data['payment_fields'] = $form_payment_fields;

		return $form_data;
	}

	/**
	 * Check if current page request meets requirements for Export tool.
	 *
	 * @since 1.5.5
	 * @deprecated 1.7.6
	 *
	 * @return bool
	 */
	public function is_tools_export_page() {

		_deprecated_function( __METHOD__, '1.7.6 of the WPForms plugin' );

		// Only proceed for the Tools > Export.
		if ( ! wpforms_is_admin_page( 'tools', 'export' ) ) {
			return false;
		}

		return true;
	}

	/**
	 * Helper function to determine if it is entries export ajax request.
	 *
	 * @since 1.6.1
	 *
	 * @return bool
	 */
	public function is_entries_export_ajax() { // phpcs:ignore Generic.Metrics.CyclomaticComplexity.TooHigh

		if ( ! wp_doing_ajax() ) {
			return false;
		}

		$ref = wp_get_raw_referer();

		if ( ! $ref ) {
			return false;
		}

		$query = wp_parse_url( $ref, PHP_URL_QUERY );

		wp_parse_str( $query, $query_vars );

		if ( empty( $query_vars['page'] ) || $query_vars['page'] !== 'wpforms-tools' ) {
			return false;
		}

		// phpcs:disable WordPress.Security.NonceVerification.Recommended
		if (
			empty( $_REQUEST['action'] ) ||
			empty( $_REQUEST['nonce'] ) ||
			( empty( $_REQUEST['form'] ) && empty( $_REQUEST['request_id'] ) )
		) {
			return false;
		}

		if (
			$_REQUEST['action'] !== 'wpforms_tools_entries_export_form_data' &&
			$_REQUEST['action'] !== 'wpforms_tools_entries_export_step'
		) {
			return false;
		}
		// phpcs:enable WordPress.Security.NonceVerification.Recommended

		return true;
	}
}