<?php
/**
 * Front-end tracking script.
 *
 * @package Dealroot
 */

namespace Dealroot;

defined( 'ABSPATH' ) || exit;

/**
 * Loads the first-party attribution script on the public site.
 */
class Tracker {

	/**
	 * Hooks.
	 */
	public function register() {
		add_action( 'wp_enqueue_scripts', array( $this, 'enqueue' ) );
		add_filter( 'show_admin_bar', array( $this, 'admin_bar' ) );
	}

	/**
	 * Whether the page is opened by the form scan, which looks at it as a browser shows it.
	 *
	 * @return bool
	 */
	public static function is_scan() {
		return isset( $_GET['dealroot_scan'] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Only hides the toolbar and the tracker on this request.
	}

	/**
	 * The toolbar is left out of a page the form scan opens.
	 *
	 * @param bool $show Whether to show the toolbar.
	 * @return bool
	 */
	public function admin_bar( $show ) {
		return self::is_scan() ? false : $show;
	}

	/**
	 * Enqueues the tracker. Runs client-side so full-page caching keeps working.
	 */
	public function enqueue() {
		// The form scan does not count as a visit.
		if ( ! Settings::get( 'tracking_enabled' ) || self::is_scan() ) {
			return;
		}

		/**
		 * Lets themes and plugins skip tracking on specific requests.
		 *
		 * @param bool $enabled Whether to load the tracker.
		 */
		if ( ! apply_filters( 'dealroot_load_tracker', true ) ) {
			return;
		}

		$script = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? 'assets/js/tracker.js' : 'assets/js/tracker.min.js';

		wp_enqueue_script(
			'dealroot-tracker',
			DEALROOT_URL . $script,
			array(),
			Plugin::asset_version( $script ),
			array(
				'strategy'  => 'defer',
				'in_footer' => true,
			)
		);

		$config = array(
			'days'      => (int) Settings::get( 'cookie_days' ),
			'consent'   => (string) Settings::get( 'consent_mode' ),
			'params'    => array_values( array_diff( Attribution::keys(), array( 'ref', 'lp', 'ts' ) ) ),
			'endpoint'  => esc_url_raw( rest_url( Rest_Api::NAMESPACE_V1 . '/submit' ) ),
			'forms'     => self::form_selector(),
			'names'     => Form_Selection::names(),
			'auto'      => (bool) Settings::get( 'found_forms' ),
			'declined'  => implode( ', ', array_filter( Form_Selection::get()['declined'], array( Form_Discovery::class, 'is_valid' ) ) ),
			'orders'    => Orders::enabled(),
			'clicks'    => (bool) Settings::get( 'track_clicks' ),
			'visits'    => (bool) Settings::get( 'count_visits' ),
			'live'      => Live::enabled(),
			'stats'     => (bool) Settings::get( 'form_stats' ),
			'dataLayer' => (bool) Settings::get( 'data_layer' ),
		);

		wp_add_inline_script(
			'dealroot-tracker',
			'window.dealrootTracker = ' . wp_json_encode( $config ) . ';',
			'before'
		);
	}

	/**
	 * Forms captured through the REST endpoint.
	 *
	 * @return string
	 */
	public static function form_selector() {
		$selector = '[data-dealroot]';

		foreach ( array( Form_Selection::selectors(), trim( (string) Settings::get( 'capture_selector' ) ) ) as $extra ) {
			if ( '' !== $extra ) {
				$selector .= ', ' . $extra;
			}
		}

		/**
		 * Filters the CSS selector of forms captured without a dedicated integration.
		 *
		 * @param string $selector CSS selector.
		 */
		return (string) apply_filters( 'dealroot_form_selector', $selector );
	}
}