<?php
/**
 * The editor panel (docs/05 §3.3): a getReport sidebar in the block editor that scores the post
 * live as you type, in the browser (assets/analyzer.js), with a dot per paragraph; a metabox with
 * the stored audit result in the Classic editor; the target question (post meta _gr_question);
 * and an "AI score" column in the post lists. Post content never leaves the site.
 *
 * @package GetReport
 */

defined( 'ABSPATH' ) || exit;

/**
 * Editor integration.
 */
class GetReport_Editor {

	const META = '_gr_question';

	/** Hooks the editor side. */
	public static function register() {
		add_action( 'init', array( __CLASS__, 'register_meta' ) );
		add_action( 'enqueue_block_editor_assets', array( __CLASS__, 'enqueue' ) );
		add_action( 'enqueue_block_assets', array( __CLASS__, 'enqueue_canvas_css' ) );
		add_action( 'add_meta_boxes', array( __CLASS__, 'classic_metabox' ), 10, 2 );
		add_action( 'save_post', array( __CLASS__, 'save_classic_question' ) );
		add_action( 'admin_init', array( __CLASS__, 'columns' ) );
	}

	/** The target question, readable and editable in the block editor by people who can edit the post. */
	public static function register_meta() {
		foreach ( GetReport_Plugin::post_types() as $type ) {
			register_post_meta(
				$type,
				self::META,
				array(
					'type'              => 'string',
					'single'            => true,
					'show_in_rest'      => true,
					'sanitize_callback' => array( __CLASS__, 'sanitize_question' ),
					'auth_callback'     => function ( $allowed, $meta_key, $post_id ) {
						return current_user_can( 'edit_post', $post_id );
					},
				)
			);
		}
	}

	/**
	 * A question: plain text, one line, at most 200 characters.
	 *
	 * @param string $q Question.
	 */
	public static function sanitize_question( $q ) {
		return mb_substr( sanitize_text_field( (string) $q ), 0, 200 );
	}

	/** Whether the current screen edits a post type the plugin covers. */
	private static function covered_screen() {
		$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
		return $screen && in_array( $screen->post_type, GetReport_Plugin::post_types(), true ) && current_user_can( 'edit_posts' );
	}

	/** The sidebar script and what it needs (enqueue_block_editor_assets). */
	public static function enqueue() {
		if ( ! self::covered_screen() ) {
			return;
		}
		$base = plugins_url( 'assets/', GETREPORT_FILE );
		wp_enqueue_script( 'getreport-analyzer', $base . 'analyzer.js', array(), GETREPORT_VERSION, true );
		wp_enqueue_script(
			'getreport-editor',
			$base . 'editor.js',
			array( 'getreport-analyzer', 'wp-plugins', 'wp-element', 'wp-components', 'wp-data', 'wp-hooks', 'wp-compose', 'wp-i18n', 'wp-edit-post' ),
			GETREPORT_VERSION,
			true
		);
		wp_set_script_translations( 'getreport-editor', 'getreport' );
		wp_add_inline_script( 'getreport-editor', 'window.getreportEditor = ' . wp_json_encode( self::editor_data() ) . ';', 'before' );
	}

	/** The dots in the editor canvas (loaded into the editor iframe; enqueue_block_assets). */
	public static function enqueue_canvas_css() {
		if ( is_admin() && self::covered_screen() ) {
			wp_enqueue_style( 'getreport-editor-canvas', plugins_url( 'assets/editor-canvas.css', GETREPORT_FILE ), array(), GETREPORT_VERSION );
		}
	}

	/** Data for the sidebar: the check catalogue, the site facts and this post's context. */
	private static function editor_data() {
		$post  = get_post();
		$facts = get_option( GetReport_Audit::FACTS );
		$site  = array();
		if ( is_array( $facts ) ) {
			$site = $facts;
			unset( $site['robots'], $site['checked_at'] );
			if ( $post && ! in_array( $post->post_type, (array) GetReport_Plugin::setting( 'author_types' ), true ) ) {
				unset( $site['shows_author'] );
			}
			if ( $post ) {
				$path                   = (string) wp_parse_url( get_permalink( $post ), PHP_URL_PATH );
				$blocked                = GetReport_Audit::robots_blocked( (string) ( $facts['robots'] ?? '' ), '' === $path ? '/' : $path );
				$site['robots_blocked'] = (bool) $blocked;
				$site['robots_detail']  = implode( ', ', $blocked );
			}
		}
		return array(
			'catalogue' => GetReport_Registry::data( 'checks-ai.json' ),
			'site'      => $site,
			'audited'   => (bool) $facts,
			'lang'      => $post ? GetReport_Audit::post_locale( $post->ID ) : get_locale(),
			'noindex'   => $post ? GetReport_Audit::post_noindex( $post->ID ) : false,
			'stale'     => (int) GetReport_Plugin::setting( 'stale_months' ),
			'fixes'     => array(
				'no-visible-date' => GetReport_Fixes::is_on( 'show-modified-date' ),
				'no-author'       => GetReport_Fixes::is_on( 'author-box' ),
			),
			'fixesUrl'  => current_user_can( 'manage_options' ) ? admin_url( 'admin.php?page=getreport-fixes' ) : '',
			'i18n'      => array(
				/* translators: %d: percent of the post. */
				'answerAt'         => __( 'The best answer starts at %d %% of the post.', 'getreport' ),
				/* translators: 1: question headings, 2: all headings. */
				'questionHeadings' => __( '%1$d of %2$d headings are questions.', 'getreport' ),
				/* translators: %d: number of words. */
				'words'            => __( '%d words.', 'getreport' ),
				/* translators: %d: months. */
				'monthsAgo'        => __( 'Last changed %d months ago.', 'getreport' ),
				/* translators: %d: percent of the words. */
				'nojsMissing'      => __( '%d %% of the text is missing from the HTML crawlers get.', 'getreport' ),
			),
		);
	}

	/**
	 * The Classic editor metabox (the block editor has the sidebar instead).
	 *
	 * @param string  $post_type Post type.
	 * @param WP_Post $post Post.
	 */
	public static function classic_metabox( $post_type, $post ) {
		if ( ! in_array( $post_type, GetReport_Plugin::post_types(), true ) ) {
			return;
		}
		if ( function_exists( 'use_block_editor_for_post' ) && use_block_editor_for_post( $post ) ) {
			return;
		}
		add_meta_box( 'getreport-ai', __( 'getReport: AI visibility', 'getreport' ), array( __CLASS__, 'render_metabox' ), $post_type, 'side' );
	}

	/**
	 * The metabox body.
	 *
	 * @param WP_Post $post Post.
	 */
	public static function render_metabox( $post ) {
		wp_nonce_field( 'getreport_question', 'getreport_question_nonce' );
		echo '<p><label for="getreport-question"><strong>' . esc_html__( 'Target question', 'getreport' ) . '</strong></label>';
		echo '<textarea id="getreport-question" name="getreport_question" rows="2" style="width:100%" placeholder="' . esc_attr( get_the_title( $post ) ) . '">' . esc_textarea( (string) get_post_meta( $post->ID, self::META, true ) ) . '</textarea></p>';
		$row = GetReport_Audit::row( $post->ID );
		if ( ! $row ) {
			echo '<p class="description">' . esc_html__( 'The score appears here after you publish or update, and on Tools → getReport → AI audit.', 'getreport' ) . '</p>';
			return;
		}
		/* translators: 1: AI readiness score, 2: quotability. */
		echo '<p><strong style="font-size:18px">' . esc_html( (string) $row['score'] ) . '</strong> / 100 · ' . esc_html( sprintf( __( 'quotability %d', 'getreport' ), $row['quote'] ) ) . '</p><ul>';
		foreach ( array_slice( $row['fails'], 0, 6 ) as $id ) {
			$c = GetReport_Registry::check( $id );
			if ( $c ) {
				echo '<li>⚠ ' . esc_html( $c['title'] ) . ( isset( $row['details'][ $id ] ) ? '<br><span class="description">' . esc_html( $row['details'][ $id ] ) . '</span>' : '' ) . '</li>';
			}
		}
		echo '</ul>';
	}

	/**
	 * Saves the question from the Classic editor.
	 *
	 * @param int $post_id Post id.
	 */
	public static function save_classic_question( $post_id ) {
		if ( ! isset( $_POST['getreport_question_nonce'] ) || ! wp_verify_nonce( sanitize_key( wp_unslash( $_POST['getreport_question_nonce'] ) ), 'getreport_question' ) ) {
			return;
		}
		if ( ! current_user_can( 'edit_post', $post_id ) || wp_is_post_revision( $post_id ) ) {
			return;
		}
		$q = isset( $_POST['getreport_question'] ) ? self::sanitize_question( sanitize_text_field( wp_unslash( $_POST['getreport_question'] ) ) ) : '';
		if ( '' === $q ) {
			delete_post_meta( $post_id, self::META );
		} else {
			update_post_meta( $post_id, self::META, $q );
		}
	}

	// ---- "AI score" column in the post lists ----

	/** Adds the column to every covered post type. */
	public static function columns() {
		foreach ( GetReport_Plugin::post_types() as $type ) {
			add_filter( "manage_{$type}_posts_columns", array( __CLASS__, 'add_column' ) );
			add_action( "manage_{$type}_posts_custom_column", array( __CLASS__, 'column' ), 10, 2 );
		}
	}

	/**
	 * The column header.
	 *
	 * @param array $cols Columns.
	 */
	public static function add_column( $cols ) {
		$cols['getreport_ai'] = esc_html__( 'AI score', 'getreport' );
		return $cols;
	}

	/**
	 * A cell: the score, coloured, with the main issue as a tooltip.
	 *
	 * @param string $col Column.
	 * @param int    $post_id Post id.
	 */
	public static function column( $col, $post_id ) {
		if ( 'getreport_ai' !== $col ) {
			return;
		}
		$row = GetReport_Audit::row( $post_id );
		if ( ! $row ) {
			echo '<span aria-hidden="true">-</span>';
			return;
		}
		$main = $row['fails'] ? GetReport_Registry::check( $row['fails'][0] ) : null;
		echo '<strong style="color:' . esc_attr( GetReport_Admin_Pages::score_colour( $row['score'] ) ) . '" title="' . esc_attr( $main ? $main['title'] : '' ) . '">' . esc_html( (string) $row['score'] ) . '</strong>';
	}
}