<?php
/**
 * Enqueues the block editor "Tagsmith" panel bundle.
 *
 * @package Tagsmith
 */

declare(strict_types=1);

namespace Tagsmith\Admin;

use Tagsmith\Capabilities;
use Tagsmith\Plugin;

defined( 'ABSPATH' ) || exit;

/**
 * Enqueues build/editor.js on the block editor screen, only when the
 * current user can view reports, the plugin is connected with a property,
 * and the current screen's post type has per-post stats enabled.
 */
class EditorPanel {

	/**
	 * Plugin service locator.
	 *
	 * @var Plugin
	 */
	private Plugin $plugin;

	/**
	 * Constructor.
	 *
	 * @param Plugin $plugin Plugin service locator.
	 */
	public function __construct( Plugin $plugin ) {
		$this->plugin = $plugin;
	}

	/**
	 * Registers the enqueue_block_editor_assets hook.
	 */
	public function register(): void {
		add_action( 'enqueue_block_editor_assets', array( $this, 'maybe_enqueue' ) );
	}

	/**
	 * Enqueues the editor bundle when every condition is met.
	 */
	public function maybe_enqueue(): void {
		if ( ! current_user_can( Capabilities::VIEW ) ) {
			return;
		}

		if ( ! $this->plugin->connection()->is_connected() || '' === (string) $this->plugin->settings()->get( 'property_id' ) ) {
			return;
		}

		$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;

		if ( null === $screen || ! in_array( $screen->post_type, (array) $this->plugin->settings()->get( 'post_types' ), true ) ) {
			return;
		}

		$this->enqueue();
	}

	/**
	 * Enqueues build/editor.js, its style and the inline tagsmithConfig.
	 */
	private function enqueue(): void {
		$handle    = 'tagsmith-editor';
		$asset_php = TAGSMITH_DIR . 'build/editor.asset.php';

		if ( ! is_readable( $asset_php ) ) {
			return;
		}

		$asset = require $asset_php;

		wp_enqueue_script(
			$handle,
			TAGSMITH_URL . 'build/editor.js',
			(array) ( $asset['dependencies'] ?? array() ),
			(string) ( $asset['version'] ?? TAGSMITH_VERSION ),
			true
		);

		wp_set_script_translations( $handle, 'tagsmith' );

		$css_path = TAGSMITH_DIR . 'build/editor.css';

		if ( is_readable( $css_path ) ) {
			wp_enqueue_style(
				$handle,
				TAGSMITH_URL . 'build/editor.css',
				array( 'wp-components' ),
				(string) ( $asset['version'] ?? TAGSMITH_VERSION )
			);
		}

		wp_add_inline_script(
			$handle,
			// This is printed inside a script block: < > and & leave as \u escapes.
			'window.tagsmithConfig = ' . wp_json_encode( $this->plugin->assets()->config(), JSON_HEX_TAG | JSON_HEX_AMP ) . ';',
			'before'
		);
	}
}