<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Class Awp_Settings
 *
 * Adds a Settings > Advance Widget Pack screen letting the site owner
 * enable/disable individual widgets and blocks. Disabling a feature only
 * hides it from being added new (the widget picker, or the block inserter
 * via allowed_block_types_all) — anywhere it's already placed keeps
 * rendering normally, so turning a feature off can't silently break an
 * existing sidebar or post.
 */
class Awp_Settings {

	const OPTION = 'awp_enabled_features';

	/**
	 * Registry of every AWP feature: which widget class and/or block name it
	 * corresponds to, and its display label. A feature may have a widget, a
	 * block, or both — disabling it hides whichever surfaces it has.
	 *
	 * @return array[] Keyed by feature slug.
	 */
	public static function get_features() {
		return array(
			'recent-posts'          => array(
				'label'  => __( 'Recent Posts', 'advance-widget-pack' ),
				'widget' => 'Awp_Recent_Post',
				'block'  => 'advance-widget-pack/recent-posts',
			),
			'popular-posts'         => array(
				'label'  => __( 'Popular Posts', 'advance-widget-pack' ),
				'widget' => 'Awp_Popular_Post',
				'block'  => 'advance-widget-pack/popular-posts',
			),
			'random-posts'          => array(
				'label'  => __( 'Random Posts', 'advance-widget-pack' ),
				'widget' => 'Awp_Random_Post',
				'block'  => null,
			),
			'featured-posts'        => array(
				'label'  => __( 'Featured Posts', 'advance-widget-pack' ),
				'widget' => 'Awp_Feature_Post',
				'block'  => null,
			),
			'recent-comments'       => array(
				'label'  => __( 'Recent Comments', 'advance-widget-pack' ),
				'widget' => 'Awp_Recent_Comments',
				'block'  => null,
			),
			'author-details'        => array(
				'label'  => __( 'Author Details', 'advance-widget-pack' ),
				'widget' => 'Awp_Author_Bio',
				'block'  => null,
			),
			'author-list'           => array(
				'label'  => __( 'Author List', 'advance-widget-pack' ),
				'widget' => 'Awp_Author_List',
				'block'  => null,
			),
			'related-posts'         => array(
				'label'  => __( 'Related Posts', 'advance-widget-pack' ),
				'widget' => 'Awp_Related_Posts',
				'block'  => 'advance-widget-pack/related-posts',
			),
			'tag-cloud'             => array(
				'label'  => __( 'Tag Cloud', 'advance-widget-pack' ),
				'widget' => 'Awp_Tag_Cloud',
				'block'  => 'advance-widget-pack/tag-cloud',
			),
			'social-links'          => array(
				'label'  => __( 'Social Links', 'advance-widget-pack' ),
				'widget' => 'Awp_Social_Links',
				'block'  => 'advance-widget-pack/social-links',
			),
			'top-authors'           => array(
				'label'  => __( 'Top Authors', 'advance-widget-pack' ),
				'widget' => 'Awp_Top_Authors',
				'block'  => 'advance-widget-pack/top-authors',
			),
			'table-of-contents'     => array(
				'label'  => __( 'Table of Contents', 'advance-widget-pack' ),
				'widget' => 'Awp_Table_Of_Contents',
				'block'  => 'advance-widget-pack/table-of-contents',
			),
			'countdown-timer'       => array(
				'label'  => __( 'Countdown Timer', 'advance-widget-pack' ),
				'widget' => null,
				'block'  => 'advance-widget-pack/countdown-timer',
			),
			'reading-progress-bar'  => array(
				'label'  => __( 'Reading Progress Bar', 'advance-widget-pack' ),
				'widget' => null,
				'block'  => 'advance-widget-pack/reading-progress-bar',
			),
		);
	}

	/**
	 * Whether a given feature is currently enabled.
	 *
	 * @param string $feature_slug One of the keys from get_features().
	 * @return bool
	 */
	public static function is_enabled( $feature_slug ) {
		$enabled = get_option( self::OPTION );

		// No option saved yet (fresh install or pre-settings-page upgrade):
		// everything is enabled by default so existing behavior is unchanged.
		if ( false === $enabled || ! is_array( $enabled ) ) {
			return true;
		}

		return ! empty( $enabled[ $feature_slug ] );
	}

	public function __construct() {
		add_action( 'admin_menu', array( $this, 'add_menu' ) );
		add_action( 'admin_init', array( $this, 'register_setting' ) );
		add_filter( 'allowed_block_types_all', array( $this, 'filter_allowed_blocks' ), 10, 2 );

		// Hide disabled widgets from the "Available Widgets" list on both the
		// classic wp-admin/widgets.php screen and the Customizer widgets
		// panel, without touching registration (existing sidebar placements
		// keep rendering — dynamic_sidebar() calls the widget directly and
		// never consults this "available" list).
		add_action( 'load-widgets.php', array( $this, 'hide_disabled_widgets_from_factory' ) );
		add_action( 'customize_register', array( $this, 'hide_disabled_widgets_from_factory' ), 20 );

		// Hide disabled widgets from the block-based widgets screen's Legacy
		// Widget block dropdown.
		add_filter( 'widget_types_to_hide_from_legacy_widget_block', array( $this, 'filter_legacy_widget_block_list' ) );
	}

	/**
	 * Removes disabled widget classes from $wp_widget_factory->widgets so
	 * they no longer appear in the "Available Widgets" picker. Only hooked
	 * on the admin screens where that list is built (see __construct()), so
	 * normal widgets_init registration and sidebar rendering are unaffected.
	 */
	public function hide_disabled_widgets_from_factory() {
		global $wp_widget_factory;

		foreach ( self::get_features() as $slug => $feature ) {
			if ( $feature['widget'] && ! self::is_enabled( $slug ) ) {
				unset( $wp_widget_factory->widgets[ $feature['widget'] ] );
			}
		}
	}

	/**
	 * Hides disabled widgets from the block-based widgets screen's Legacy
	 * Widget block dropdown, keyed by id_base rather than class name.
	 *
	 * Deliberately does NOT look up id_base via $wp_widget_factory->widgets:
	 * hide_disabled_widgets_from_factory() may have already unset the same
	 * disabled widgets from that array earlier in the same request (both are
	 * hooked on admin screens that can run together), which would make the
	 * lookup fail here. Instead each class's own id_base is resolved directly
	 * by instantiating it once, independent of the factory's current state.
	 *
	 * @param string[] $widgets List of widget id_base slugs to hide.
	 * @return string[]
	 */
	public function filter_legacy_widget_block_list( $widgets ) {
		foreach ( self::get_features() as $slug => $feature ) {
			if ( ! $feature['widget'] || self::is_enabled( $slug ) ) {
				continue;
			}

			if ( class_exists( $feature['widget'] ) ) {
				$widgets[] = ( new $feature['widget']() )->id_base;
			}
		}

		return $widgets;
	}

	/**
	 * Adds Settings > Advance Widget Pack.
	 */
	public function add_menu() {
		add_options_page(
			__( 'Advance Widget Pack', 'advance-widget-pack' ),
			__( 'Advance Widget Pack', 'advance-widget-pack' ),
			'manage_options',
			'advance-widget-pack',
			array( $this, 'render_page' )
		);
	}

	/**
	 * Registers the enabled-features option.
	 */
	public function register_setting() {
		register_setting(
			'awp_settings_group',
			self::OPTION,
			array(
				'type'              => 'array',
				'sanitize_callback' => array( $this, 'sanitize' ),
				'default'           => self::all_enabled_default(),
			)
		);
	}

	/**
	 * Default option value: every feature enabled, matching pre-settings-page
	 * behavior so activating this version changes nothing until the site
	 * owner opts to disable something.
	 *
	 * @return array
	 */
	private static function all_enabled_default() {
		return array_fill_keys( array_keys( self::get_features() ), 1 );
	}

	/**
	 * Sanitizes the posted checkbox list into a slug => 1 map, dropping any
	 * unknown keys and ensuring every known feature has an explicit value.
	 *
	 * @param array $input Raw posted values.
	 * @return array
	 */
	public function sanitize( $input ) {
		$input  = (array) $input;
		$output = array();

		foreach ( array_keys( self::get_features() ) as $slug ) {
			$output[ $slug ] = ! empty( $input[ $slug ] ) ? 1 : 0;
		}

		return $output;
	}

	/**
	 * Hides disabled blocks from the block inserter. Blocks stay registered
	 * (see awp_register_blocks() in the main plugin file), so a block
	 * instance already placed in a post keeps rendering even after this
	 * filter removes it from the "add new block" list.
	 *
	 * @param bool[]|true              $allowed_block_types Array of allowed block type slugs, or true (all allowed).
	 * @param WP_Block_Editor_Context $context               Editor context (unused).
	 * @return bool[]|true
	 */
	public function filter_allowed_blocks( $allowed_block_types, $context ) {
		$disabled_blocks = array();

		foreach ( self::get_features() as $slug => $feature ) {
			if ( $feature['block'] && ! self::is_enabled( $slug ) ) {
				$disabled_blocks[] = $feature['block'];
			}
		}

		if ( ! $disabled_blocks ) {
			return $allowed_block_types;
		}

		// If core/other plugins already returned a specific allow-list, just
		// remove our disabled ones from it. Otherwise (true = "all allowed"),
		// build a full list of every registered block minus our disabled ones.
		if ( true === $allowed_block_types ) {
			$allowed_block_types = wp_list_pluck( WP_Block_Type_Registry::get_instance()->get_all_registered(), 'name' );
		}

		return array_values( array_diff( $allowed_block_types, $disabled_blocks ) );
	}

	/**
	 * Renders the settings page: one checkbox per feature.
	 */
	public function render_page() {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}
		?>
		<div class="wrap">
			<h1><?php esc_html_e( 'Advance Widget Pack', 'advance-widget-pack' ); ?></h1>
			<p><?php esc_html_e( 'Turn off any widget or block you don\'t use. Disabling a feature only removes it from the widget picker and block inserter — anything already placed in a sidebar or post keeps working.', 'advance-widget-pack' ); ?></p>
			<form method="post" action="options.php">
				<?php settings_fields( 'awp_settings_group' ); ?>
				<table class="widefat striped" style="max-width:700px;">
					<thead>
						<tr>
							<th style="width:60px;"><?php esc_html_e( 'Enabled', 'advance-widget-pack' ); ?></th>
							<th><?php esc_html_e( 'Feature', 'advance-widget-pack' ); ?></th>
							<th><?php esc_html_e( 'Available as', 'advance-widget-pack' ); ?></th>
						</tr>
					</thead>
					<tbody>
						<?php foreach ( self::get_features() as $slug => $feature ) : ?>
							<tr>
								<td>
									<input
										type="checkbox"
										name="<?php echo esc_attr( self::OPTION ); ?>[<?php echo esc_attr( $slug ); ?>]"
										value="1"
										<?php checked( self::is_enabled( $slug ) ); ?>
									/>
								</td>
								<td><?php echo esc_html( $feature['label'] ); ?></td>
								<td>
									<?php
									$surfaces = array();
									if ( $feature['widget'] ) {
										$surfaces[] = __( 'Widget', 'advance-widget-pack' );
									}
									if ( $feature['block'] ) {
										$surfaces[] = __( 'Block', 'advance-widget-pack' );
									}
									echo esc_html( implode( ' + ', $surfaces ) );
									?>
								</td>
							</tr>
						<?php endforeach; ?>
					</tbody>
				</table>
				<?php submit_button(); ?>
			</form>
		</div>
		<?php
	}
}