<?php
declare(strict_types=1);

namespace RtbPanelConnector\Events;

use RtbPanelConnector\Admin\Settings;
use RtbPanelConnector\Core\Consts;
use RtbPanelConnector\Helpers\JavaScripts;

defined('ABSPATH') || exit;

/**
 * INIT event. (RTB House Pixel)
 */
class InitEvent{
	public const EVENT_TYPE = 'init';
	public const CDN_URL = 'https://tags.creativecdn.com/';

	/** @var bool */
	private bool $debug;
	/** @var string */
	private string $hash;
	/** @var string */
	private string $dc;

	public static function build(): void
	{
		$config = self::getConfig();
		if ($config->hash === '') {
			if ($config->debug) {
				JavaScripts::enqueueDebugNotice('RTB Panel Connector: Tagging hash is not configured, pixel will not be loaded.');
			}
			return;
		}
		$init   = InitEvent::getEventBody($config->hash, $config->dc);
		$srcUrl = self::CDN_URL . rawurlencode($config->hash) . '.js';

		$body  = JavaScripts::bootstrapQueueJs();
		$body .= JavaScripts::bootstrapDebugJs();
		$body .= 'if(dbg){try{console.log("[RTB Panel Connector] init",'.wp_json_encode($init).');}catch(e){}}';
		$body .= 'q.push('.wp_json_encode($init).');';
		$body .= 'var f=d.getElementsByTagName("script")[0],c=d.createElement("script");c.async=true;c.src='.wp_json_encode($srcUrl).';f.parentNode.insertBefore(c,f);';

		$handle = JavaScripts::registerInlineHandle('rtb-panel-init', false);
		wp_add_inline_script($handle, JavaScripts::wrapIife($body, 'w,d,dbg', 'window,document,' . ($config->debug ? 'true' : 'false')));
	}

	private static function getEventBody(string $hash, string $dc): array
	{
		return [
			'eventType' => self::EVENT_TYPE,
			'value'     => $hash,
			'dc'        => $dc,
		];

	}

	private static function getConfig(): object
	{
		$options = get_option(Settings::OPTION_NAME, array());
		$debug   = !empty($options['debug']);
		$hash    = isset($options['tagging_hash']) ? trim((string) $options['tagging_hash']) : '';
		$dc      = isset($options['dc']) ? (string) $options['dc'] : Consts::DATA_CENTER_AMS;

		return (object) [
			'debug' => $debug,
			'hash'  => $hash,
			'dc'    => $dc,
		];
	}
}