<?php

namespace DeliciousBrains\WPMDB\Common\FormData;

use DeliciousBrains\WPMDB\Common\MigrationPersistence\Persistence;
use DeliciousBrains\WPMDB\Common\Sql\Table;
use DeliciousBrains\WPMDB\WPMDBDI;

class FormData {
	/**
	 * @var array
	 */
	private $accepted_fields;

	public function __construct() {
		$this->accepted_fields = array(
			'action',
			'save_computer',
			'gzip_file',
			'connection_info',
			'replace_old',
			'replace_new',
			'table_migrate_option',
			'select_tables',
			'replace_guids',
			'exclude_spam',
			'save_migration_profile',
			'save_migration_profile_option',
			'create_new_profile',
			'create_backup',
			'remove_backup',
			'keep_active_plugins',
			'keep_blog_public',
			'select_post_types',
			'backup_option',
			'select_backup',
			'exclude_transients',
			'exclude_post_types',
			'exclude_post_revisions',
			'compatibility_older_mysql',
			'export_dest',
			'import_find_replace',
			'current_migration',
			'search_replace',
			'regex',
			'case_sensitive',
		);
	}

	public function form_data_compat( $data ) {
		$current_migration = $data['current_migration'];
		$advanced_options  = $current_migration['advanced_options_selected'];

		$return = [
			'action'                    => $current_migration['intent'],
			'select_tables'             => isset( $current_migration['tables_selected'] ) ? $current_migration['tables_selected'] : [],
			'table_migrate_option'      => isset( $current_migration['tables_option'] ) ? $current_migration['tables_option'] : '',
			'create_backup'             => isset( $current_migration['backup_option'] ) && $current_migration['backup_option'] !== 'none' ? 1 : 0,
			'backup_option'             => isset( $current_migration['backup_option'] ) ? $current_migration['backup_option'] : '',
			'select_backup'             => isset( $current_migration['backup_tables_selected'] ) ? $current_migration['backup_tables_selected'] : [],
			'select_post_types'         => isset( $current_migration['post_types_selected'] ) ? $current_migration['post_types_selected'] : [],
			'exclude_post_revisions'    => in_array( 'exclude_post_revisions', $advanced_options ) ? '1' : '0',
			'replace_guids'             => in_array( 'replace_guids', $advanced_options ) ? '1' : '0',
			'compatibility_older_mysql' => in_array( 'compatibility_older_mysql', $advanced_options ) ? '1' : '0',
			'exclude_transients'        => in_array( 'exclude_transients', $advanced_options ) ? '1' : '0',
			'exclude_spam'              => in_array( 'exclude_spam', $advanced_options ) ? '1' : '0',
			'keep_active_plugins'       => in_array( 'keep_active_plugins', $advanced_options ) ? '1' : '0',
			'keep_blog_public'          => in_array( 'keep_blog_public', $advanced_options ) ? '1' : '0',
			'gzip_file'                 => in_array( 'gzip_file', $advanced_options ) ? '1' : '0',
			'exclude_post_types'        => '0',
		];

		if ( in_array( $current_migration['intent'], array( 'push', 'pull' ) ) ) {
			$return['connection_info']          = isset( $data['connection_info'], $data['connection_info']['connection_state'] ) ? $data['connection_info']['connection_state']['value'] : '';
			$return['connection_updates_count'] = isset( $data['connection_info'], $data['connection_info']['connection_updates_count'] ) ? $data['connection_info']['connection_updates_count'] : 0;
		}

		if ( $return['table_migrate_option'] === 'selected' ) {
			$return['table_migrate_option'] = 'migrate_select';
		}

		if ( $current_migration['post_types_option'] !== 'all' ) {
			$return['exclude_post_types'] = 1;
		}

		if ( $return['exclude_post_revisions'] === '1' && $current_migration['post_types_option'] === 'all' ) {
			$table                        = WPMDBDI::getInstance()->get( Table::class );
			$return['select_post_types']  = array_diff( $table->get_post_types(), [ 'revision' ] );
			$return['exclude_post_types'] = 1;
		}

		//make sure revisions are included when user has selected post types to migrate but did not exclude revisions
		if (
			$return['exclude_post_revisions'] === '0' &&
			$return['exclude_post_types'] === 1 &&
			! in_array( 'revision', $return['select_post_types'], true )
		) {
			$return['select_post_types'][] = 'revision';
		}

		return $return;
	}

	/**
	 * Returns validated and sanitized form data.
	 *
	 * @param array|string $data
	 *
	 * @return array|string
	 */

	// @TODO - refactor usage
	public function parse_and_save_migration_form_data( $data ) {
		$form_data = json_decode( $data, true );

		$this->accepted_fields = apply_filters( 'wpmdb_accepted_profile_fields', $this->accepted_fields );

		$form_data = array_intersect_key( $form_data, array_flip( $this->accepted_fields ) );

		$compat_form_data = $this->form_data_compat( $form_data );

		if ( ! empty( $compat_form_data ) && is_array( $compat_form_data ) ) {
			$form_data = array_merge( $form_data, $compat_form_data );
		}

		$existing_form_data = Persistence::getMigrationOptions();

		if ( ! empty( $existing_form_data ) ) {
			$form_data = array_replace_recursive( $existing_form_data, $form_data );
		}

		Persistence::saveMigrationOptions( $form_data );

		return $form_data;
	}

	/**
	 * Get current form data.
	 *
	 * @return mixed|null
	 */
	public function getFormData() {
		$saved_form_data = Persistence::getMigrationOptions();

		if ( empty( $saved_form_data ) ) {
			return null;
		}

		return $saved_form_data;
	}

	public function getCurrentMigrationData() {
		$form_data = $this->getFormData();

		if ( isset( $form_data['current_migration'] ) ) {
			return $form_data['current_migration'];
		}

		return false;
	}

	/**
	 * Get stages for current migration.
	 *
	 * @return false|array
	 */
	public function getMigrationStages() {
		$current_migration = $this->getCurrentMigrationData();

		if ( ! $current_migration ) {
			return false;
		}

		if ( isset( $current_migration['stages'] ) ) {
			return $current_migration['stages'];
		}

		return false;
	}
}