<?php
namespace AIOSEO\Plugin\Common\Admin;

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

use AIOSEO\Plugin\Common\Models;

/**
 * Limit Modified Date class.
 *
 * @since 4.1.8
 */
class LimitModifiedDate {
	/**
	 * Class constructor.
	 *
	 * @since 4.1.8
	 *
	 * @return void
	 */
	public function __construct() {
		if ( apply_filters( 'aioseo_last_modified_date_disable', false ) ) {
			return;
		}

		// Reset modified date when the post is updated.
		add_filter( 'wp_insert_post_data', [ $this, 'resetModifiedDate' ], 99999, 2 );
		add_filter( 'wp_insert_attachment_data', [ $this, 'resetModifiedDate' ], 99999, 2 );

		add_action( 'rest_api_init', [ $this, 'registerRestHooks' ] );

		if ( ! is_admin() ) {
			return;
		}

		add_action( 'admin_enqueue_scripts', [ $this, 'enqueueScripts' ], 20 );
		add_action( 'post_submitbox_misc_actions', [ $this, 'classicEditorField' ] );
	}

	/**
	 * Register the REST API hooks.
	 *
	 * @since 4.1.8
	 *
	 * @return void
	 */
	public function registerRestHooks() {
		// Prevent REST API from dropping limit modified date value before updating the post.
		foreach ( aioseo()->helpers->getPublicPostTypes( true ) as $postType ) {
			add_action( "rest_pre_insert_$postType", [ $this, 'addLimitModifiedDateValue' ], 10, 2 );
		}
	}

	/**
	 * Enqueues the scripts for the Limited Modified Date functionality.
	 *
	 * @since 4.1.8
	 *
	 * @return void
	 */
	public function enqueueScripts() {
		if ( ! $this->isAllowed() || ! aioseo()->helpers->isScreenBase( 'post' ) ) {
			return;
		}

		// Only enqueue this script if the post-settings-metabox is already enqueued.
		if ( wp_script_is( 'aioseo-post-settings-metabox', 'enqueued' ) ) {
			aioseo()->helpers->enqueueScript(
				'aioseo-limit-modified-date',
				'js/limit-modified-date.js'
			);
		}
	}

	/**
	 * Adds the Limit Modified Date field to the post object to prevent it from being dropped.
	 *
	 * @since 4.1.8
	 *
	 * @param  Object          $preparedPost The post data.
	 * @param  WP_REST_Request $restRequest  The request.
	 * @return Object                        The modified post data.
	 */
	public function addLimitModifiedDateValue( $preparedPost, $restRequest ) {
		if ( 'PUT' !== $restRequest->get_method() ) {
			return $preparedPost;
		}

		$params = $restRequest->get_json_params();
		if ( empty( $params ) || ! isset( $params['aioseo_limit_modified_date'] ) ) {
			return $preparedPost;
		}

		$preparedPost->aioseo_limit_modified_date = $params['aioseo_limit_modified_date'];

		return $preparedPost;
	}

	/**
	 * Resets the modified date when a post is updated if the Limit Modified Date option is enabled.
	 *
	 * @since 4.1.8
	 *
	 * @param  array $sanitizedData   The sanitized post data.
	 * @param  array $unsanitizedData The unsanitized post data.
	 * @return array                  The modified sanitized post data.
	 */
	public function resetModifiedDate( $sanitizedData, $unsanitizedData ) {
		// If the ID isn't set, a new post is being inserted.
		if ( ! isset( $unsanitizedData['ID'] ) ) {
			return $sanitizedData;
		}

		$shouldReset = false;

		// Handle the REST API request from the Block Editor.
		if ( aioseo()->helpers->isRestApiRequest() ) {
			// If the value isn't set, then the value wasn't changed in the editor, and we can grab it from the post.
			if ( ! isset( $unsanitizedData['aioseo_limit_modified_date'] ) ) {
				$aioseoPost = Models\Post::getPost( $unsanitizedData['ID'] );
				if ( $aioseoPost->exists() && $aioseoPost->limit_modified_date ) {
					$shouldReset = true;
				}
			} else {
				if ( $unsanitizedData['aioseo_limit_modified_date'] ) {
					$shouldReset = true;
				}
			}
		}

		// Handle the POST request.
		if ( isset( $unsanitizedData['aioseo-post-settings'] ) ) {
			$aioseoData = json_decode( stripslashes( $unsanitizedData['aioseo-post-settings'] ) );
			if ( ! empty( $aioseoData->limit_modified_date ) ) {
				$shouldReset = true;
			}
		}

		if ( $shouldReset ) {
			$sanitizedData['post_modified']     = $unsanitizedData['post_modified'];
			$sanitizedData['post_modified_gmt'] = $unsanitizedData['post_modified_gmt'];
		}

		return $sanitizedData;
	}

	/**
	 * Add the checkbox in the Classic Editor.
	 *
	 * @since 4.1.8
	 *
	 * @param  WP_Post $post The post object.
	 * @return void
	 */
	public function classicEditorField( $post ) {
		if ( ! $this->isAllowed( $post->post_type ) ) {
			return;
		}

		?>
		<div class="misc-pub-section">
			<div id="aioseo-limit-modified-date"></div>
		</div>
		<?php
	}

	/**
	 * Check if the Limit Modified Date functionality is allowed to run.
	 *
	 * @since 4.1.8
	 *
	 * @param  string $postType The current post type.
	 * @return bool             Whether the functionality is allowed.
	 */
	private function isAllowed( $postType = false ) {
		if ( empty( $postType ) ) {
			$postType = get_post_type();
		}

		if ( class_exists( 'Limit_Modified_Date', false ) ) {
			return false;
		}

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

		if ( ! aioseo()->access->hasCapability( 'aioseo_page_general_settings' ) ) {
			return false;
		}

		return true;
	}

	/**
	 * Check if the given post type is allowed to limit the modified date.
	 *
	 * @since 4.1.8
	 *
	 * @param  string $postType The post type name.
	 * @return bool             Whether the post type is allowed.
	 */
	private function isAllowedPostType( $postType ) {
		$dynamicOptions = aioseo()->dynamicOptions->noConflict();
		$postTypes      = aioseo()->helpers->getPublicPostTypes( true );
		$postTypes      = apply_filters( 'aioseo_limit_modified_date_post_types', $postTypes );

		if ( ! in_array( $postType, $postTypes, true ) ) {
			return false;
		}

		if ( ! $dynamicOptions->searchAppearance->postTypes->has( $postType ) || ! $dynamicOptions->searchAppearance->postTypes->$postType->advanced->showMetaBox ) {
			return false;
		}

		return true;
	}
}