<?php

namespace WPFormsPDF;

use WPFormsPDF\Builder\FormBuilder;
use WPFormsPDF\Builder\Ajax;
use WPFormsPDF\Notifications\Process;
use WPFormsPDF\SmartTags\SmartTags;
use WPFormsPDF\Templates\Templates;
use WPFormsPDF\Templates\Themes;
use WPFormsPDF\Access\PDF as AccessPDF;
use WPFormsPDF\Access\File as AccessFile;
use WPFormsPDF\Admin\Entry;

/**
 * Main class.
 *
 * @since 1.0.0
 */
final class Plugin {

	/**
	 * Provider name.
	 *
	 * @since 1.0.0
	 */
	public const NAME = 'PDF';

	/**
	 * Provider slug.
	 *
	 * @since 1.0.0
	 */
	public const SLUG = 'pdf';

	/**
	 * Notifications Process instance.
	 *
	 * @since 1.0.0
	 *
	 * @var Process
	 */
	private $process;

	/**
	 * Helpers instance.
	 *
	 * @since 1.0.0
	 *
	 * @var Helpers
	 */
	public $helpers;

	/**
	 * Templates instance.
	 *
	 * @since 1.0.0
	 *
	 * @var Templates
	 */
	public $templates;

	/**
	 * Themes instance.
	 *
	 * @since 1.0.0
	 *
	 * @var Themes
	 */
	public $themes;

	/**
	 * FormBuilder instance.
	 *
	 * @since 1.0.0
	 *
	 * @var FormBuilder
	 */
	public $form_builder;

	/**
	 * Access instance.
	 *
	 * @since 1.0.0
	 *
	 * @var AccessPDF
	 */
	public $access;

	/**
	 * Access File instance.
	 *
	 * @since 1.0.0
	 *
	 * @var AccessFile
	 */
	public $access_file;

	/**
	 * Entry instance.
	 *
	 * @since 1.0.0
	 *
	 * @var Entry
	 */
	public $entry;

	/**
	 * Plugin constructor.
	 *
	 * @since 1.0.0
	 */
	private function __construct() {}

	/**
	 * Get a single instance of the class.
	 *
	 * @since 1.0.0
	 *
	 * @return Plugin
	 */
	public static function get_instance(): Plugin {

		static $instance = null;

		if ( ! $instance ) {
			$instance = new Plugin();

			$instance->init();
		}

		return $instance;
	}

	/**
	 * Initialize plugin.
	 *
	 * @since 1.0.0
	 */
	public function init(): void {

		$this->load_dependencies();
		$this->hooks();
	}

	/**
	 * Plugin hooks.
	 *
	 * @since 1.0.0
	 */
	private function hooks(): void {

		add_filter( 'wpforms_helpers_templates_include_html_located', [ $this, 'register_templates' ], 10, 2 );
	}

	/**
	 * Get property.
	 *
	 * @since 1.0.0
	 *
	 * @param string $property_name Property name.
	 *
	 * @return mixed
	 */
	public function get( string $property_name ) {

		return property_exists( $this, $property_name ) ? $this->{$property_name} : null;
	}

	/**
	 * Register addon templates location.
	 *
	 * @since 1.0.0
	 *
	 * @param string|mixed $located  Template location.
	 * @param string       $template Template.
	 *
	 * @return string
	 */
	public function register_templates( $located, string $template ): string {

		// Checking if `$template` is an absolute path and passed from this plugin.
		if (
			strpos( $template, WPFORMS_PDF_PATH ) === 0 &&
			is_readable( $template )
		) {
			return $template;
		}

		return (string) $located;
	}

	/**
	 * All the actual plugin loading is done here.
	 *
	 * @since 1.0.0
	 */
	private function load_dependencies(): void {

		$this->helpers      = new Helpers();
		$this->process      = new Process();
		$this->templates    = new Templates();
		$this->themes       = new Themes();
		$this->form_builder = new FormBuilder();
		$this->access       = new AccessPDF();
		$this->access_file  = new AccessFile();
		$this->entry        = new Entry();

		( new Cleanup() )->init();

		( new SmartTags() )->init();

		if ( ! wpforms_is_admin_ajax() ) {
			return;
		}

		// AJAX handlers.
		new Ajax\TemplateFields();
		new Ajax\SaveForm();
		new Ajax\Preview();
		new Ajax\Template();
		new Ajax\Theme();
	}
}