<?php

declare(strict_types=1);

/**
 * BeyondWords "Add Player" component.
 *
 * @package Beyondwords\Wordpress
 * @author  Stuart McAlpine <stu@beyondwords.io>
 * @since   3.2.0
 */

namespace Beyondwords\Wordpress\Component\Post\AddPlayer;

use Beyondwords\Wordpress\Core\CoreUtils;

/**
 * AddPlayer setup
 *
 * @since 3.2.0
 */
class AddPlayer
{
    // The CSS declaration block for the player preview in both Classic Editor and Block Editor.
    public const PLAYER_PREVIEW_STYLE_FORMAT = "iframe [data-beyondwords-player]:empty:after, .edit-post-visual-editor [data-beyondwords-player]:empty:after { content: '%s'; }"; // phpcs:ignore Generic.Files.LineLength.TooLong

    // The player preview placeholder text.
    public const PLAYER_PREVIEW_TEXT = 'Player placeholder: The position of the audio player.';

    /**
     * Constructor
     */
    public function __construct()
    {
        add_action('init', array($this, 'registerBlock'));
        add_action('enqueue_block_editor_assets', array($this, 'addBlockEditorStylesheet'));

        add_action('admin_head', array($this, 'addEditorStyles'));
        add_filter('tiny_mce_before_init', array($this, 'filterTinyMceSettings'));

        add_filter('mce_external_plugins', array($this, 'addPlugin'));
        add_filter('mce_buttons', array($this, 'addButton'));
        add_filter('mce_css', array($this, 'addStylesheet'));
    }

    /**
     * Register Block.
     */
    public function registerBlock()
    {
        \register_block_type(__DIR__);
    }

    /**
     * Add TinyMCE buttons.
     *
     * @param array TinyMCE plugin array
     */
    public function addPlugin($plugin_array)
    {
        $plugin_array['beyondwords_player'] = BEYONDWORDS__PLUGIN_URI . 'src/Component/Post/AddPlayer/tinymce.js';
        return $plugin_array;
    }

    /**
     * Register TinyMCE buttons.
     *
     * @param array TinyMCE buttons array
     */
    public function addButton($buttons)
    {
        $advIndex = array_search('wp_adv', $buttons);

        if ($advIndex === false) {
            $advIndex = count($buttons);
        }

        array_splice($buttons, $advIndex, 0, ['beyondwords_player']);

        return $buttons;
    }

    /**
     * Filters the comma-delimited list of stylesheets to load in TinyMCE.
     */
    public function addStylesheet($stylesheets)
    {
        return $stylesheets . ',' . BEYONDWORDS__PLUGIN_URI . 'src/Component/Post/AddPlayer/AddPlayer.css';
    }

    /**
     * "Player Preview" i18n styles.
     *
     * Player preview uses the CSS :after to set the content so we pass the CSS through WordPress i18n functions here.
     *
     * @since 3.3.0
     *
     * @return string CSS Block for player preview i18n delcerations.
     */
    public function playerPreviewI18nStyles()
    {
        return sprintf(
            self::PLAYER_PREVIEW_STYLE_FORMAT,
            esc_attr__(self::PLAYER_PREVIEW_TEXT, 'speechkit')
        );
    }

    /**
     * Tiny MCE before init.
     *
     * Adds i18n-compatible TinyMCE Classic Editor CSS for the player placeholder.
     *
     * @since 3.3.0
     *
     * @param mixed[] $setings An array with TinyMCE config.
     *
     * @return mixed[] An array with TinyMCE config.
     */
    public function filterTinyMceSettings($settings)
    {
        if (isset($settings['content_style'])) {
            $settings['content_style'] .= ' ' . $this->playerPreviewI18nStyles() . ' ';
        } else {
            $settings['content_style'] = $this->playerPreviewI18nStyles() . ' ';
        }

        return $settings;
    }

    /**
     * Add editor styles.
     *
     * Adds i18n-compatible Block Editor CSS for the player placeholder.
     *
     * @since 3.3.0
     */
    public function addEditorStyles()
    {
        $allowed_html = array(
            'style' => array(),
        );

        echo wp_kses(
            sprintf('<style>%s</style>', $this->playerPreviewI18nStyles()),
            $allowed_html
        );
    }

    /**
     * Add Block Editor Stylesheet.
     */
    public function addBlockEditorStylesheet($hook)
    {
        // Only enqueue for Gutenberg/Post screens
        if (CoreUtils::isGutenbergPage() || $hook === 'post.php' || $hook === 'post-new.php') {
            // Register the Classic/Block Editor "Add Player" CSS
            wp_enqueue_style(
                'beyondwords-AddPlayer',
                BEYONDWORDS__PLUGIN_URI . 'src/Component/Post/AddPlayer/AddPlayer.css',
                array(),
                BEYONDWORDS__PLUGIN_VERSION
            );
        }
    }
}