<?php
/**
 * Base class for editor integrations.
 *
 * @package AIIL
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Base editor integration class.
 */
abstract class AIIL_Editor_Integration {

	/**
	 * Editor name.
	 *
	 * @var string
	 */
	protected $name = '';

	/**
	 * Whether this integration requires premium.
	 *
	 * @var bool
	 */
	protected $requires_premium = false;

	/**
	 * Initialize integration.
	 */
	abstract public static function init();

	/**
	 * Check if this integration should be loaded.
	 *
	 * @return bool
	 */
	protected function should_load() {
		if ( $this->requires_premium && ! AIIL_Core::is_licence_active() ) {
			return false;
		}

		if ( ! $this->is_editor_active() ) {
			return false;
		}

		// Check if current post type is supported.
		return $this->is_supported_post_type();
	}

	/**
	 * Check if current post type is supported.
	 * Uses $_GET parameters to determine post type early in the request lifecycle.
	 *
	 * @return bool
	 */
	protected function is_supported_post_type() {
		$post_type = $this->get_current_post_type();

		if ( ! $post_type ) {
			return false;
		}

		$supported_post_types = AIIL_Core::get_supported_post_types();
		$is_supported = in_array( $post_type, $supported_post_types, true );

		return $is_supported;
	}

	/**
	 * Get current post type from request.
	 *
	 * Note: Nonce verification is not required here as this method only reads
	 * GET parameters to determine the current context (post type) for the editor.
	 * It's used during asset enqueuing and doesn't process, save, or modify data.
	 * All values are properly sanitized before use.
	 *
	 * @return string|false Post type or false if not found.
	 */
	protected function get_current_post_type() {
		global $pagenow;

		// For new posts: post-new.php?post_type=custom_type
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Only reading context, not processing data.
		if ( isset( $_GET['post_type'] ) ) {
			// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Only reading context, not processing data.
			$post_type = sanitize_text_field( wp_unslash( $_GET['post_type'] ) );
			return $post_type;
		}

		// For existing posts: post.php?post=123
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Only reading context, not processing data.
		if ( isset( $_GET['post'] ) ) {
			// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Only reading context, not processing data.
			$post_id = absint( $_GET['post'] );
			$post    = get_post( $post_id );
			if ( $post ) {
				return $post->post_type;
			}
		}

		// Default to 'post' if we're on post-new.php without post_type param.
		if ( 'post-new.php' === $pagenow ) {
			return 'post';
		}

		return false;
	}

	/**
	 * Check if editor is active.
	 *
	 * @return bool
	 */
	abstract protected function is_editor_active();

	/**
	 * Enqueue editor assets.
	 */
	abstract public function enqueue_assets();

	/**
	 * Get editor name.
	 *
	 * @return string
	 */
	public function get_name() {
		return $this->name;
	}
}