<?php
/**
 * Render Shortcode Tool.
 *
 * Executes a WordPress shortcode and returns the rendered output. Uses
 * do_shortcode() for safe execution with optional content parameter.
 *
 * @package   Agenistrator
 * @since     1.0.0
 * @author    Alex Ruban <alex@maximum.guru>
 * @author    Maximum Software Inc <contact@maximum.software>
 * @license   GPL-3.0-only
 * @link      https://agenistrator.com/
 *
 * SPDX-FileCopyrightText: 2025-2026 Alex Ruban <alex@maximum.guru>
 * SPDX-FileCopyrightText: 2025-2026 Maximum Software Inc <contact@maximum.software>
 * SPDX-License-Identifier: GPL-3.0-only
 */

namespace Agenistrator;

// Direct access prevention
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Render_Shortcode_Tool class.
 */
class Render_Shortcode_Tool extends Tool {

	/**
	 * Get the tool ID.
	 *
	 * @return string The tool ID.
	 * @since     1.0.0
	 */
	public function get_id() {
		return 'render_shortcode';
	}

	/**
	 * Get the tool name.
	 *
	 * @return string The tool name.
	 * @since     1.0.0
	 */
	public function get_name() {
		return __( 'Render Shortcode', 'agenistrator' );
	}

	/**
	 * Get the description of the tool.
	 *
	 * @return string The description of the tool.
	 * @since     1.0.0
	 */
	public function get_description() {
		return 'Executes a WordPress shortcode and returns the rendered HTML output. Useful for previewing shortcode output.';
	}

	/**
	 * Get the parameters for this tool.
	 *
	 * @return array Parameters schema in JSON Schema format.
	 * @since     1.0.0
	 */
	public function get_parameters() {
		return array(
			'type'       => 'object',
			'properties' => array(
				'shortcode' => array(
					'type'        => 'string',
					'description' => 'The full shortcode string to render, including brackets (e.g., "[gallery ids=1,2,3]" or "[contact-form id=1]"). Use `get_shortcode_details` tool first to view the shortcode source code and discover accepted parameters.',
				),
			),
			'required'   => array( 'shortcode' ),
		);
	}

	/**
	 * Check if the current user has permission to execute this tool.
	 *
	 * @return bool Whether the user has permission.
	 * @since     1.0.0
	 */
	public function current_user_can_execute() {
		return current_user_can( 'manage_options' );
	}

	/**
	 * Check if this tool is read-only.
	 *
	 * @return bool True - this tool only renders output, no persistent changes.
	 * @since     1.0.0
	 */
	public function is_read_only() {
		return true;
	}

	/**
	 * Execute the tool with the given arguments.
	 *
	 * @param array $args The arguments for the tool.
	 * @return array The result of executing the tool.
	 * @since     1.0.0
	 */
	protected function execute( $args ) {
		$shortcode = $args['shortcode'];

		// Extract the shortcode tag for validation
		$tag = $this->extract_shortcode_tag( $shortcode );

		if ( ! $tag ) {
			return $this->error_response( 'Invalid shortcode format. Shortcode must be wrapped in brackets (e.g., "[gallery]").' );
		}

		// Check if the shortcode exists
		if ( ! shortcode_exists( $tag ) ) {
			return $this->error_response( String_Utils::replace_tags( 'Shortcode [{tag}] is not registered.', array( 'tag' => $tag ) ) );
		}

		// Render the shortcode
		$output = do_shortcode( $shortcode );

		// Check if output is the same as input (shortcode wasn't processed)
		if ( $shortcode === $output ) {
			return $this->error_response( String_Utils::replace_tags( 'Shortcode [{tag}] did not produce any output.', array( 'tag' => $tag ) ) );
		}

		$output_length = strlen( $output );

		return $this->success_response(
			'Shortcode rendered successfully',
			array(
				'tag'           => $tag,
				'input'         => $shortcode,
				'output'        => $output,
				'output_length' => $output_length,
			)
		);
	}

	/**
	 * Extract the shortcode tag from a shortcode string.
	 *
	 * @param string $shortcode The full shortcode string.
	 * @return string|null The shortcode tag, or null if invalid.
	 */
	private function extract_shortcode_tag( $shortcode ) {
		// Match shortcode pattern: [tag ...] or [tag]
		if ( preg_match( '/^\[([a-zA-Z0-9_-]+)/', $shortcode, $matches ) ) {
			return $matches[1];
		}

		return null;
	}
}
