<?php
/**
 * REST functionality for AAA Option Optimizer.
 *
 * @package Emilia\OptionOptimizer
 */

namespace Emilia\OptionOptimizer;

use WP_Error;
use WP_REST_Request;
use WP_REST_Response;

/**
 * REST functionality of AAA Option Optimizer.
 */
class REST {

	/**
	 * The map plugin to options class.
	 *
	 * @var Map_Plugin_To_Options
	 */
	private $map_plugin_to_options;

	/**
	 * Registers hooks.
	 *
	 * @return void
	 */
	public function register_hooks() {
		$this->map_plugin_to_options = new Map_Plugin_To_Options();

		add_action( 'rest_api_init', [ $this, 'register_rest_routes' ] );
	}

	/**
	 * Register the REST API routes.
	 *
	 * @return void
	 */
	public function register_rest_routes() {
		\register_rest_route(
			'aaa-option-optimizer/v1',
			'/update-autoload',
			[
				'methods'             => 'POST',
				'callback'            => [ $this, 'update_option_autoload' ],
				'permission_callback' => function () {
					return current_user_can( 'manage_options' );
				},
				'args'                => [
					'option_name' => [
						'required'          => true,
						'sanitize_callback' => 'sanitize_text_field',
					],
					'autoload'    => [
						'required'          => true,
						'sanitize_callback' => 'sanitize_text_field',
					],
				],
			]
		);

		\register_rest_route(
			'aaa-option-optimizer/v1',
			'/delete-option',
			[
				'methods'             => 'POST',
				'callback'            => [ $this, 'delete_option' ],
				'permission_callback' => function () {
					return current_user_can( 'manage_options' );
				},
				'args'                => [
					'option_name' => [
						'required'          => true,
						'sanitize_callback' => 'sanitize_text_field',
					],
				],
			]
		);

		\register_rest_route(
			'aaa-option-optimizer/v1',
			'/create-option-false',
			[
				'methods'             => 'POST',
				'callback'            => [ $this, 'create_option_false' ],
				'permission_callback' => function () {
					return current_user_can( 'manage_options' );
				},
				'args'                => [
					'option_name' => [
						'required'          => true,
						'sanitize_callback' => 'sanitize_text_field',
					],
				],
			]
		);

		\register_rest_route(
			'aaa-option-optimizer/v1',
			'/all-options',
			[
				'methods'             => 'GET',
				'callback'            => [ $this, 'get_all_options' ],
				'permission_callback' => function () {
					return current_user_can( 'manage_options' );
				},
			]
		);

		\register_rest_route(
			'aaa-option-optimizer/v1',
			'/reset',
			[
				'methods'             => 'POST',
				'callback'            => [ $this, 'reset_stats' ],
				'permission_callback' => function () {
					return current_user_can( 'manage_options' );
				},
			]
		);
	}

	/**
	 * Update autoload status of an option.
	 *
	 * @return \WP_Error|\WP_REST_Response
	 */
	public function reset_stats() {
		Plugin::get_instance()->reset();
		return new \WP_REST_Response( [ 'success' => true ], 200 );
	}

	/**
	 * Update autoload status of an option.
	 *
	 * @return \WP_Error|\WP_REST_Response
	 */
	public function get_all_options() {
		global $wpdb;

		$output = [];
		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching -- We need to query all options.
		$options = $wpdb->get_results( "SELECT option_name, option_value, autoload FROM $wpdb->options" );
		foreach ( $options as $option ) {
			$output[] = [
				'name'     => $option->option_name,
				'plugin'   => $this->map_plugin_to_options->get_plugin_name( $option->option_name ),
				'value'    => htmlentities( $option->option_value, ENT_QUOTES | ENT_SUBSTITUTE ),
				'size'     => number_format( strlen( $option->option_value ) / 1024, 2 ),
				'autoload' => $option->autoload,
				'row_id'   => 'option_' . $option->option_name,
			];
		}
		return new \WP_REST_Response( [ 'data' => $output ], 200 );
	}

	/**
	 * Update autoload status of an option.
	 *
	 * @param \WP_REST_Request $request The REST request object.
	 *
	 * @return \WP_Error|\WP_REST_Response
	 */
	public function update_option_autoload( $request ) {
		$option_name  = $request['option_name'];
		$autoload     = $request['autoload'];
		$option_value = get_option( $option_name );

		if ( ! in_array( $autoload, [ 'yes', 'on', 'no', 'off','auto', 'auto-on', 'auto-off' ], true ) ) {
			return new \WP_Error( 'invalid_autoload_value', 'Invalid autoload value', [ 'status' => 400 ] );
		}

		if ( false === $option_value ) {
			return new \WP_Error( 'option_not_found', 'Option does not exist', [ 'status' => 404 ] );
		}

		delete_option( $option_name );
		$autoload_values = \wp_autoload_values_to_autoload();
		$bool_autoload   = false;
		if ( in_array( $autoload, $autoload_values, true ) ) {
			$bool_autoload = true;
		}
		$succeeded = add_option( $option_name, $option_value, '', $bool_autoload );

		if ( ! $succeeded ) {
			return new \WP_Error( 'update_failed', 'Updating the option failed', [ 'status' => 400 ] );
		}
		return new \WP_REST_Response( [ 'success' => true ], 200 );
	}

	/**
	 * Delete an option.
	 *
	 * @param \WP_REST_Request $request The REST request object.
	 *
	 * @return \WP_REST_Response|\WP_Error
	 */
	public function delete_option( $request ) {
		$option_name = $request['option_name'];
		if ( delete_option( $option_name ) ) {
			return new \WP_REST_Response( [ 'success' => true ], 200 );
		}
		return new \WP_Error( 'option_not_found_or_deleted', 'Option does not exist or could not be deleted', [ 'status' => 404 ] );
	}

	/**
	 * Create an option with a false value.
	 *
	 * @param \WP_REST_Request $request  The REST request object.
	 *
	 * @return \WP_Error|\WP_REST_Response
	 */
	public function create_option_false( $request ) {
		$option_name = $request['option_name'];
		if ( add_option( $option_name, false, '', false ) ) {
			return new \WP_REST_Response( [ 'success' => true ], 200 );
		}
		return new \WP_Error( 'option_not_created', 'Option could not be created', [ 'status' => 400 ] );
	}
}