<?php
/**
 * Admin screens: the grid, tabs and settings.
 *
 * @package CodeCraft\Gridsmith
 */

defined( 'ABSPATH' ) || exit;

/**
 * Admin UI.
 */
class BDBE_Admin {

	/**
	 * Screen hook suffixes.
	 *
	 * @var string[]
	 */
	private static $hooks = array();

	/**
	 * Hook in.
	 */
	public static function init() {
		add_action( 'admin_menu', array( __CLASS__, 'menu' ) );
		add_action( 'admin_init', array( __CLASS__, 'register_settings' ) );
		add_action( 'admin_enqueue_scripts', array( __CLASS__, 'enqueue' ) );
		add_filter( 'option_page_capability_bdbe_settings_group', array( __CLASS__, 'settings_capability' ) );
	}

	/**
	 * Store managers may save Gridsmith settings.
	 *
	 * @return string
	 */
	public static function settings_capability() {
		return 'manage_woocommerce';
	}

	/**
	 * Tabs on the main screen.
	 *
	 * @return array key => array( label, pro )
	 */
	public static function tabs() {
		return array(
			'products'  => array(
				'label' => __( 'Products', 'gridsmith' ),
				'pro'   => false,
			),
			'orders'    => array(
				'label' => __( 'Orders', 'gridsmith' ),
				'pro'   => true,
			),
			'coupons'   => array(
				'label' => __( 'Coupons', 'gridsmith' ),
				'pro'   => true,
			),
			'history'   => array(
				'label' => __( 'History', 'gridsmith' ),
				'pro'   => true,
			),
			'scheduled' => array(
				'label' => __( 'Scheduled', 'gridsmith' ),
				'pro'   => true,
			),
		);
	}

	/**
	 * Current tab.
	 *
	 * @return string
	 */
	public static function current_tab() {
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only navigation parameter.
		$tab = isset( $_GET['tab'] ) ? sanitize_key( wp_unslash( $_GET['tab'] ) ) : 'products';
		return array_key_exists( $tab, self::tabs() ) ? $tab : 'products';
	}

	/**
	 * Register menus.
	 */
	public static function menu() {
		self::$hooks[] = add_menu_page(
			__( 'Gridsmith — Bulk Edit', 'gridsmith' ),
			__( 'Gridsmith', 'gridsmith' ),
			'manage_woocommerce',
			'bdbe',
			array( __CLASS__, 'render_main' ),
			'dashicons-editor-table',
			56
		);
		self::$hooks[] = add_submenu_page(
			'bdbe',
			__( 'Gridsmith — Bulk Edit', 'gridsmith' ),
			__( 'Bulk Edit', 'gridsmith' ),
			'manage_woocommerce',
			'bdbe',
			array( __CLASS__, 'render_main' )
		);
		self::$hooks[] = add_submenu_page(
			'bdbe',
			__( 'Gridsmith Settings', 'gridsmith' ),
			__( 'Settings', 'gridsmith' ),
			'manage_woocommerce',
			'bdbe-settings',
			array( __CLASS__, 'render_settings' )
		);
	}

	/**
	 * Scripts and styles, only on Gridsmith screens.
	 *
	 * @param string $hook Current screen hook.
	 */
	public static function enqueue( $hook ) {
		if ( ! in_array( $hook, self::$hooks, true ) ) {
			return;
		}
		wp_enqueue_style( 'bdbe-admin', BDBE_URL . 'assets/css/bdbe-admin.css', array(), BDBE_VERSION );

		if ( 'toplevel_page_bdbe' !== $hook ) {
			return;
		}
		$tab    = self::current_tab();
		$entity = array(
			'products' => 'product',
			'orders'   => 'order',
			'coupons'  => 'coupon',
		);
		$key    = isset( $entity[ $tab ] ) ? $entity[ $tab ] : '';
		$object = $key ? BDBE_Plugin::entity( $key ) : null;

		wp_enqueue_script( 'bdbe-admin', BDBE_URL . 'assets/js/bdbe-admin.js', array(), BDBE_VERSION, true );
		$settings = BDBE_Plugin::settings();
		wp_localize_script(
			'bdbe-admin',
			'bdbeData',
			array(
				'root'       => esc_url_raw( rest_url( BDBE_Rest::NS . '/' ) ),
				'nonce'      => wp_create_nonce( 'wp_rest' ),
				'entity'     => $object ? $object->key() : '',
				'pro'        => BDBE_Edition::is_pro(),
				'columns'    => $object ? BDBE_Fields::columns( $object->fields() ) : array(),
				'perPage'    => (int) $settings['per_page'],
				'undo'       => BDBE_Changes::undo_info(),
				'decimals'   => wc_get_price_decimals(),
				'currency'   => html_entity_decode( get_woocommerce_currency_symbol(), ENT_QUOTES, 'UTF-8' ),
				'priceModes' => BDBE_Bulk::price_modes(),
				'i18n'       => self::js_strings(),
			)
		);
	}

	/**
	 * Strings used by the grid script.
	 *
	 * @return array
	 */
	private static function js_strings() {
		return array(
			'loading'        => __( 'Loading…', 'gridsmith' ),
			'empty'          => __( 'Nothing matches these filters. Clear a filter to see more.', 'gridsmith' ),
			/* translators: %d: number of changed cells. */
			'saveN'          => __( 'Save %d changes', 'gridsmith' ),
			'save'           => __( 'Save changes', 'gridsmith' ),
			'saving'         => __( 'Saving…', 'gridsmith' ),
			/* translators: %d: number of records. */
			'saved'          => __( 'Saved: %d record(s) updated.', 'gridsmith' ),
			/* translators: %d: number of records with errors. */
			'saveErrors'     => __( 'Not saved: %d record(s). Fix the highlighted cells and save again.', 'gridsmith' ),
			'unsaved'        => __( 'You have unsaved changes. Discard them?', 'gridsmith' ),
			'discard'        => __( 'Discard all unsaved changes?', 'gridsmith' ),
			/* translators: %s: label of the last change. */
			'undoConfirm'    => __( 'Undo "%s"? Values changed since then by someone else are kept.', 'gridsmith' ),
			/* translators: 1: restored values, 2: skipped values. */
			'undone'         => __( 'Undone: %1$d values restored, %2$d skipped because they changed since.', 'gridsmith' ),
			'nothingUndo'    => __( 'Nothing to undo', 'gridsmith' ),
			/* translators: %s: label of the last change. */
			'undoLabel'      => __( 'Undo: %s', 'gridsmith' ),
			/* translators: 1: first row, 2: last row, 3: total. */
			'showing'        => __( '%1$d–%2$d of %3$d', 'gridsmith' ),
			/* translators: %d: number of selected rows. */
			'selected'       => __( '%d selected', 'gridsmith' ),
			/* translators: %d: number of matching records. */
			'allMatching'    => __( 'All %d matching products', 'gridsmith' ),
			/* translators: %d: number of selected products. */
			'selectedOnly'   => __( 'Only the %d selected rows', 'gridsmith' ),
			/* translators: 1: processed, 2: total. */
			'progress'       => __( 'Working… %1$d of %2$d', 'gridsmith' ),
			/* translators: 1: changed records, 2: skipped records. */
			'bulkDone'       => __( 'Done: %1$d updated, %2$d skipped.', 'gridsmith' ),
			'variableSkip'   => __( 'Variable products are skipped — their prices live on the variations (Gridsmith Pro edits those).', 'gridsmith' ),
			'requestFailed'  => __( 'The request failed. Check your connection and try again.', 'gridsmith' ),
			'selectRows'     => __( 'Select at least one row first.', 'gridsmith' ),
			'chooseColumn'   => __( 'Choose a column', 'gridsmith' ),
			'setValue'       => __( 'Set', 'gridsmith' ),
			'locked'         => __( 'This value cannot be edited here.', 'gridsmith' ),
			'editProduct'    => __( 'Open in the editor', 'gridsmith' ),
			'selectRow'      => __( 'Select row', 'gridsmith' ),
			'selectAll'      => __( 'Select all rows on this page', 'gridsmith' ),
			'scheduled'      => __( 'Scheduled. You can follow it on the Scheduled tab.', 'gridsmith' ),
			'viewName'       => __( 'Name this view', 'gridsmith' ),
			'viewSaved'      => __( 'View saved.', 'gridsmith' ),
			'viewDeleted'    => __( 'View deleted.', 'gridsmith' ),
			'deleteView'     => __( 'Delete this saved view?', 'gridsmith' ),
			/* translators: 1: number of changes restored, 2: skipped. */
			'rolledBack'     => __( 'Rolled back: %1$d values restored, %2$d skipped because they changed since.', 'gridsmith' ),
			'rollbackAsk'    => __( 'Roll back this batch? Values changed since then are kept.', 'gridsmith' ),
			'cancelAsk'      => __( 'Cancel this scheduled change?', 'gridsmith' ),
			'runAsk'         => __( 'Run this scheduled change now?', 'gridsmith' ),
			'variationsNote' => __( 'variations', 'gridsmith' ),
		);
	}

	/**
	 * Render the main screen.
	 */
	public static function render_main() {
		if ( ! current_user_can( 'manage_woocommerce' ) ) {
			return;
		}
		$tab = self::current_tab();
		?>
		<div class="wrap bdbe-wrap">
			<h1 class="wp-heading-inline"><?php esc_html_e( 'Gridsmith', 'gridsmith' ); ?></h1>
			<span class="bdbe-tagline"><?php esc_html_e( 'Bulk edit products & orders in a spreadsheet grid', 'gridsmith' ); ?></span>
			<hr class="wp-header-end">
			<nav class="nav-tab-wrapper bdbe-tabs" aria-label="<?php esc_attr_e( 'Gridsmith sections', 'gridsmith' ); ?>">
				<?php foreach ( self::tabs() as $key => $info ) : ?>
					<a href="<?php echo esc_url( admin_url( 'admin.php?page=bdbe' . ( 'products' === $key ? '' : '&tab=' . $key ) ) ); ?>" class="nav-tab<?php echo $tab === $key ? ' nav-tab-active' : ''; ?>"<?php echo $tab === $key ? ' aria-current="page"' : ''; ?>>
						<?php echo esc_html( $info['label'] ); ?>
						<?php
						if ( $info['pro'] && ! BDBE_Edition::is_pro() ) {
							echo BDBE_Edition::badge(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- escaped in badge().
						}
						?>
					</a>
				<?php endforeach; ?>
			</nav>
			<?php
			$tabs = self::tabs();
			if ( $tabs[ $tab ]['pro'] && ! BDBE_Edition::is_pro() ) {
				self::render_locked_tab( $tab );
			} elseif ( 'products' === $tab ) {
				self::render_grid( BDBE_Plugin::entity( 'product' ) );
			} else {
				/**
				 * Render a Pro tab.
				 */
				do_action( 'bdbe_render_tab_' . $tab );
			}
			?>
		</div>
		<?php
	}

	/**
	 * Locked preview of a Pro tab in Free.
	 *
	 * @param string $tab Tab key.
	 */
	private static function render_locked_tab( $tab ) {
		$text = array(
			'orders'    => array( __( 'Bulk edit orders', 'gridsmith' ), __( 'Change the status of many orders at once in the same grid, filtered by status or customer. Works with High-Performance Order Storage.', 'gridsmith' ) ),
			'coupons'   => array( __( 'Bulk edit coupons', 'gridsmith' ), __( 'Edit coupon codes, amounts, discount types, expiry dates and usage limits in a spreadsheet.', 'gridsmith' ) ),
			'history'   => array( __( 'Change history', 'gridsmith' ), __( 'Every grid edit and bulk action is logged with who changed what, from which value to which value — and any batch can be rolled back with one click.', 'gridsmith' ) ),
			'scheduled' => array( __( 'Scheduled bulk changes', 'gridsmith' ), __( 'Schedule a price change for later — start a sale at midnight on Friday and end it on Monday — and Gridsmith applies it in the background.', 'gridsmith' ) ),
		);
		$info = isset( $text[ $tab ] ) ? $text[ $tab ] : array( '', '' );
		?>
		<div class="bdbe-locked-tab card">
			<h2><?php echo esc_html( $info[0] ); ?></h2>
			<p><?php echo esc_html( $info[1] ); ?></p>
			<?php BDBE_Edition::locked_notice( $info[0] ); ?>
		</div>
		<?php
	}

	/**
	 * A small Pro marker for disabled controls in Free.
	 *
	 * @return string Escaped HTML.
	 */
	private static function pro_mark() {
		return BDBE_Edition::is_pro() ? '' : BDBE_Edition::badge();
	}

	/**
	 * Render the grid shell for an entity (rows are loaded over REST).
	 *
	 * @param BDBE_Entity|null $entity Entity.
	 */
	public static function render_grid( $entity ) {
		if ( ! $entity ) {
			return;
		}
		$pro        = BDBE_Edition::is_pro();
		$is_product = 'product' === $entity->key();
		$controls   = method_exists( $entity, 'filter_controls' ) ? $entity->filter_controls() : self::product_filter_controls();
		?>
		<div class="bdbe-app" id="bdbe-app" data-entity="<?php echo esc_attr( $entity->key() ); ?>">
			<div class="bdbe-toolbar" role="search">
				<?php foreach ( $controls as $control ) : ?>
					<?php $id = 'bdbe-filter-' . $control['key']; ?>
					<div class="bdbe-field">
						<label for="<?php echo esc_attr( $id ); ?>"><?php echo esc_html( $control['label'] ); ?></label>
						<?php if ( 'select' === $control['type'] ) : ?>
							<select id="<?php echo esc_attr( $id ); ?>" data-filter="<?php echo esc_attr( $control['key'] ); ?>">
								<option value=""><?php echo esc_html( $control['all'] ); ?></option>
								<?php foreach ( $control['options'] as $value => $label ) : ?>
									<option value="<?php echo esc_attr( $value ); ?>"><?php echo esc_html( $label ); ?></option>
								<?php endforeach; ?>
							</select>
						<?php else : ?>
							<input type="search" id="<?php echo esc_attr( $id ); ?>" data-filter="<?php echo esc_attr( $control['key'] ); ?>" placeholder="<?php echo esc_attr( $control['placeholder'] ); ?>">
						<?php endif; ?>
					</div>
				<?php endforeach; ?>
				<?php if ( $is_product ) : ?>
					<div class="bdbe-field bdbe-field-check">
						<label class="bdbe-check<?php echo $pro ? '' : ' is-locked'; ?>">
							<input type="checkbox" id="bdbe-variations" <?php disabled( ! $pro ); ?>>
							<?php esc_html_e( 'Show variations', 'gridsmith' ); ?>
							<?php echo self::pro_mark(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- escaped in badge(). ?>
						</label>
					</div>
				<?php endif; ?>
				<div class="bdbe-field bdbe-field-reset">
					<button type="button" class="button-link" id="bdbe-reset"><?php esc_html_e( 'Clear filters', 'gridsmith' ); ?></button>
				</div>
				<div class="bdbe-toolbar-end">
					<?php if ( $is_product ) : ?>
						<div class="bdbe-field">
							<label for="bdbe-views"><?php esc_html_e( 'Saved views', 'gridsmith' ); ?> <?php echo self::pro_mark(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- escaped in badge(). ?></label>
							<span class="bdbe-inline">
								<select id="bdbe-views" <?php disabled( ! $pro ); ?>>
									<option value=""><?php esc_html_e( '— Choose a view —', 'gridsmith' ); ?></option>
								</select>
								<button type="button" class="button" id="bdbe-view-save" <?php disabled( ! $pro ); ?>><?php esc_html_e( 'Save view', 'gridsmith' ); ?></button>
								<button type="button" class="button bdbe-icon-button" id="bdbe-view-delete" disabled aria-label="<?php esc_attr_e( 'Delete saved view', 'gridsmith' ); ?>"><span class="dashicons dashicons-trash" aria-hidden="true"></span></button>
							</span>
						</div>
					<?php endif; ?>
					<div class="bdbe-field bdbe-columns">
						<span class="bdbe-label-spacer" aria-hidden="true">&nbsp;</span>
						<button type="button" class="button" id="bdbe-columns-toggle" aria-expanded="false" aria-controls="bdbe-columns-menu"><span class="dashicons dashicons-columns" aria-hidden="true"></span> <?php esc_html_e( 'Columns', 'gridsmith' ); ?></button>
						<div class="bdbe-columns-menu" id="bdbe-columns-menu" hidden></div>
					</div>
				</div>
			</div>

			<div class="bdbe-actionbar">
				<span class="bdbe-selected-count" id="bdbe-selected-count" aria-live="polite"></span>
				<?php if ( $is_product ) : ?>
					<button type="button" class="button" id="bdbe-bulk-price"><span class="dashicons dashicons-tag" aria-hidden="true"></span> <?php esc_html_e( 'Bulk price change', 'gridsmith' ); ?></button>
					<button type="button" class="button" id="bdbe-replace" <?php disabled( ! $pro ); ?>><span class="dashicons dashicons-search" aria-hidden="true"></span> <?php esc_html_e( 'Find & replace', 'gridsmith' ); ?> <?php echo self::pro_mark(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- escaped in badge(). ?></button>
				<?php endif; ?>
				<span class="bdbe-setvalue">
					<label for="bdbe-set-column" class="screen-reader-text"><?php esc_html_e( 'Column to set for the selected rows', 'gridsmith' ); ?></label>
					<select id="bdbe-set-column"></select>
					<span id="bdbe-set-input-wrap"></span>
					<button type="button" class="button" id="bdbe-set-apply"><?php esc_html_e( 'Set for selected', 'gridsmith' ); ?></button>
				</span>
				<span class="bdbe-actionbar-end">
					<button type="button" class="button" id="bdbe-undo" disabled><span class="dashicons dashicons-undo" aria-hidden="true"></span> <span class="bdbe-undo-text"><?php esc_html_e( 'Undo', 'gridsmith' ); ?></span></button>
					<button type="button" class="button" id="bdbe-discard" disabled><?php esc_html_e( 'Discard', 'gridsmith' ); ?></button>
					<button type="button" class="button button-primary" id="bdbe-save" disabled><?php esc_html_e( 'Save changes', 'gridsmith' ); ?></button>
				</span>
			</div>

			<div class="bdbe-notices" id="bdbe-notices" aria-live="polite"></div>

			<div class="bdbe-grid-wrap" id="bdbe-grid-wrap">
				<table class="bdbe-grid" id="bdbe-grid" role="grid" aria-label="<?php echo esc_attr( $entity->label() ); ?>" aria-rowcount="-1">
					<thead></thead>
					<tbody></tbody>
				</table>
			</div>

			<div class="bdbe-footer">
				<span class="bdbe-keys"><kbd>↑</kbd><kbd>↓</kbd><kbd>←</kbd><kbd>→</kbd> <?php esc_html_e( 'move', 'gridsmith' ); ?> · <kbd>Enter</kbd> <?php esc_html_e( 'edit', 'gridsmith' ); ?> · <kbd>Esc</kbd> <?php esc_html_e( 'cancel', 'gridsmith' ); ?> · <kbd>Ctrl</kbd>+<kbd>S</kbd> <?php esc_html_e( 'save', 'gridsmith' ); ?></span>
				<span class="bdbe-pager">
					<span id="bdbe-showing"></span>
					<button type="button" class="button" id="bdbe-prev" aria-label="<?php esc_attr_e( 'Previous page', 'gridsmith' ); ?>">‹</button>
					<button type="button" class="button" id="bdbe-next" aria-label="<?php esc_attr_e( 'Next page', 'gridsmith' ); ?>">›</button>
					<label for="bdbe-per-page" class="screen-reader-text"><?php esc_html_e( 'Rows per page', 'gridsmith' ); ?></label>
					<select id="bdbe-per-page">
						<?php foreach ( array( 20, 50, 100, 200 ) as $n ) : ?>
							<option value="<?php echo esc_attr( (string) $n ); ?>">
								<?php
								/* translators: %d: rows per page. */
								echo esc_html( sprintf( __( '%d per page', 'gridsmith' ), $n ) );
								?>
							</option>
						<?php endforeach; ?>
					</select>
				</span>
			</div>

			<?php
			if ( $is_product ) {
				self::render_price_dialog();
				if ( $pro ) {
					/**
					 * Pro dialogs (find & replace, save view).
					 */
					do_action( 'bdbe_render_dialogs' );
				}
			}
			?>
		</div>
		<?php
	}

	/**
	 * Filter controls for products.
	 *
	 * @return array
	 */
	public static function product_filter_controls() {
		$cats  = array();
		$terms = get_terms(
			array(
				'taxonomy'   => 'product_cat',
				'hide_empty' => false,
				'orderby'    => 'name',
			)
		);
		if ( ! is_wp_error( $terms ) ) {
			foreach ( $terms as $term ) {
				$cats[ $term->slug ] = $term->name;
			}
		}
		return array(
			array(
				'key'         => 'search',
				'type'        => 'search',
				'label'       => __( 'Search', 'gridsmith' ),
				'placeholder' => __( 'Name or SKU…', 'gridsmith' ),
			),
			array(
				'key'     => 'category',
				'type'    => 'select',
				'label'   => __( 'Category', 'gridsmith' ),
				'all'     => __( 'All categories', 'gridsmith' ),
				'options' => $cats,
			),
			array(
				'key'     => 'stock_status',
				'type'    => 'select',
				'label'   => __( 'Stock status', 'gridsmith' ),
				'all'     => __( 'Any stock status', 'gridsmith' ),
				'options' => wc_get_product_stock_status_options(),
			),
			array(
				'key'     => 'type',
				'type'    => 'select',
				'label'   => __( 'Type', 'gridsmith' ),
				'all'     => __( 'All types', 'gridsmith' ),
				'options' => wc_get_product_types(),
			),
			array(
				'key'     => 'status',
				'type'    => 'select',
				'label'   => __( 'Status', 'gridsmith' ),
				'all'     => __( 'Any status', 'gridsmith' ),
				'options' => BDBE_Entity_Products::statuses(),
			),
		);
	}

	/**
	 * Bulk price dialog.
	 */
	private static function render_price_dialog() {
		$pro = BDBE_Edition::is_pro();
		?>
		<dialog class="bdbe-dialog" id="bdbe-price-dialog" aria-labelledby="bdbe-price-title">
			<form method="dialog" class="bdbe-dialog-form" id="bdbe-price-form">
				<h2 id="bdbe-price-title"><span class="dashicons dashicons-tag" aria-hidden="true"></span> <?php esc_html_e( 'Bulk price change', 'gridsmith' ); ?></h2>
				<fieldset class="bdbe-scope">
					<legend><?php esc_html_e( 'Apply to', 'gridsmith' ); ?></legend>
					<label><input type="radio" name="scope" value="selected"> <span class="bdbe-scope-selected"></span></label>
					<label><input type="radio" name="scope" value="filter" checked> <span class="bdbe-scope-filter"></span></label>
				</fieldset>
				<div class="bdbe-dialog-grid">
					<p>
						<label for="bdbe-price-target"><?php esc_html_e( 'Price', 'gridsmith' ); ?></label>
						<select id="bdbe-price-target" name="target">
							<option value="regular_price"><?php esc_html_e( 'Regular price', 'gridsmith' ); ?></option>
							<option value="sale_price"><?php esc_html_e( 'Sale price', 'gridsmith' ); ?></option>
						</select>
					</p>
					<p>
						<label for="bdbe-price-mode"><?php esc_html_e( 'Change', 'gridsmith' ); ?></label>
						<select id="bdbe-price-mode" name="mode">
							<?php foreach ( BDBE_Bulk::price_modes() as $mode => $label ) : ?>
								<option value="<?php echo esc_attr( $mode ); ?>"><?php echo esc_html( $label ); ?></option>
							<?php endforeach; ?>
						</select>
					</p>
					<p>
						<label for="bdbe-price-value"><?php esc_html_e( 'Value', 'gridsmith' ); ?></label>
						<input type="text" inputmode="decimal" id="bdbe-price-value" name="value" value="10" autocomplete="off">
					</p>
				</div>
				<p class="bdbe-preview" id="bdbe-price-preview" aria-live="polite"></p>
				<p>
					<label class="bdbe-check<?php echo $pro ? '' : ' is-locked'; ?>">
						<input type="checkbox" name="include_variations" id="bdbe-price-variations" <?php disabled( ! $pro ); ?> <?php checked( $pro ); ?>>
						<?php esc_html_e( 'Also change the variations of variable products', 'gridsmith' ); ?>
						<?php echo self::pro_mark(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- escaped in badge(). ?>
					</label>
				</p>
				<fieldset class="bdbe-when">
					<legend><?php esc_html_e( 'When', 'gridsmith' ); ?></legend>
					<label><input type="radio" name="when" value="now" checked> <?php esc_html_e( 'Now', 'gridsmith' ); ?></label>
					<label class="<?php echo $pro ? '' : 'is-locked'; ?>"><input type="radio" name="when" value="later" <?php disabled( ! $pro ); ?>> <?php esc_html_e( 'Schedule for', 'gridsmith' ); ?> <?php echo self::pro_mark(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- escaped in badge(). ?></label>
					<label for="bdbe-price-at" class="screen-reader-text"><?php esc_html_e( 'Date and time', 'gridsmith' ); ?></label>
					<input type="datetime-local" id="bdbe-price-at" name="run_at" <?php disabled( ! $pro ); ?>>
				</fieldset>
				<div class="bdbe-progress" hidden><div class="bdbe-progress-bar"></div><span class="bdbe-progress-text"></span></div>
				<div class="bdbe-dialog-actions">
					<button type="button" class="button" value="cancel" data-close><?php esc_html_e( 'Cancel', 'gridsmith' ); ?></button>
					<button type="submit" class="button button-primary" value="apply" id="bdbe-price-apply"><?php esc_html_e( 'Apply price change', 'gridsmith' ); ?></button>
				</div>
			</form>
		</dialog>
		<?php
	}

	/**
	 * Register settings.
	 */
	public static function register_settings() {
		register_setting(
			'bdbe_settings_group',
			'bdbe_settings',
			array(
				'type'              => 'array',
				'sanitize_callback' => array( __CLASS__, 'sanitize_settings' ),
				'default'           => BDBE_Plugin::default_settings(),
			)
		);
		register_setting(
			'bdbe_settings_group',
			'bdbe_delete_data',
			array(
				'type'              => 'integer',
				'sanitize_callback' => 'absint',
				'default'           => 0,
			)
		);
	}

	/**
	 * Sanitise settings.
	 *
	 * @param mixed $input Raw input.
	 * @return array
	 */
	public static function sanitize_settings( $input ) {
		$input = is_array( $input ) ? $input : array();
		$old   = BDBE_Plugin::settings();
		$out   = $old;

		$per             = isset( $input['per_page'] ) ? absint( $input['per_page'] ) : 50;
		$out['per_page'] = in_array( $per, array( 20, 50, 100, 200 ), true ) ? $per : 50;

		if ( BDBE_Edition::is_pro() ) {
			if ( isset( $input['custom_fields'] ) ) {
				$keys = preg_split( '/[\s,]+/', sanitize_textarea_field( (string) $input['custom_fields'] ) );
				$keys = array_filter(
					array_map( 'trim', (array) $keys ),
					function ( $key ) {
						return (bool) preg_match( '/^[A-Za-z0-9_\-]{1,64}$/', $key );
					}
				);
				$out['custom_fields'] = implode( "\n", array_slice( array_unique( $keys ), 0, 15 ) );
			}
			if ( isset( $input['history_days'] ) ) {
				$out['history_days'] = min( 3650, max( 1, absint( $input['history_days'] ) ) );
			}
		}
		BDBE_Plugin::flush_settings();
		return $out;
	}

	/**
	 * Settings screen.
	 */
	public static function render_settings() {
		if ( ! current_user_can( 'manage_woocommerce' ) ) {
			return;
		}
		$s   = BDBE_Plugin::settings();
		$pro = BDBE_Edition::is_pro();
		?>
		<div class="wrap bdbe-wrap">
			<h1><?php esc_html_e( 'Gridsmith Settings', 'gridsmith' ); ?></h1>
			<form method="post" action="options.php" class="bdbe-settings">
				<?php settings_fields( 'bdbe_settings_group' ); ?>
				<table class="form-table" role="presentation">
					<tr>
						<th scope="row"><label for="bdbe-set-per-page"><?php esc_html_e( 'Rows per page', 'gridsmith' ); ?></label></th>
						<td>
							<select id="bdbe-set-per-page" name="bdbe_settings[per_page]">
								<?php foreach ( array( 20, 50, 100, 200 ) as $n ) : ?>
									<option value="<?php echo esc_attr( (string) $n ); ?>" <?php selected( (int) $s['per_page'], $n ); ?>><?php echo esc_html( (string) $n ); ?></option>
								<?php endforeach; ?>
							</select>
							<p class="description"><?php esc_html_e( 'How many rows the grid loads at a time. Rows are always loaded page by page from the server, so large catalogues stay fast.', 'gridsmith' ); ?></p>
						</td>
					</tr>
					<tr>
						<th scope="row"><label for="bdbe-set-cf"><?php esc_html_e( 'Custom field columns', 'gridsmith' ); ?></label><?php echo self::pro_mark(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- escaped in badge(). ?></th>
						<td>
							<textarea id="bdbe-set-cf" name="bdbe_settings[custom_fields]" rows="4" class="large-text code" <?php disabled( ! $pro ); ?> placeholder="_gtin&#10;supplier_code"><?php echo esc_textarea( (string) $s['custom_fields'] ); ?></textarea>
							<p class="description"><?php esc_html_e( 'One product meta key per line (letters, numbers, - and _). Each becomes an editable column in the product grid. Up to 15.', 'gridsmith' ); ?></p>
							<?php
							if ( ! $pro ) {
								BDBE_Edition::locked_notice( __( 'Custom field columns', 'gridsmith' ) );
							}
							?>
						</td>
					</tr>
					<tr>
						<th scope="row"><label for="bdbe-set-days"><?php esc_html_e( 'Keep history for', 'gridsmith' ); ?></label><?php echo self::pro_mark(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- escaped in badge(). ?></th>
						<td>
							<input type="number" min="1" max="3650" id="bdbe-set-days" name="bdbe_settings[history_days]" value="<?php echo esc_attr( (string) $s['history_days'] ); ?>" class="small-text" <?php disabled( ! $pro ); ?>> <?php esc_html_e( 'days', 'gridsmith' ); ?>
							<p class="description"><?php esc_html_e( 'Older change history is removed automatically once a day.', 'gridsmith' ); ?></p>
							<?php
							if ( ! $pro ) {
								BDBE_Edition::locked_notice( __( 'Change history with rollback', 'gridsmith' ) );
							}
							?>
						</td>
					</tr>
					<tr>
						<th scope="row"><?php esc_html_e( 'Uninstall', 'gridsmith' ); ?></th>
						<td>
							<input type="hidden" name="bdbe_delete_data" value="0">
							<label for="bdbe-set-delete"><input type="checkbox" id="bdbe-set-delete" name="bdbe_delete_data" value="1" <?php checked( (int) get_option( 'bdbe_delete_data', 0 ), 1 ); ?>> <?php esc_html_e( 'Delete all plugin data when the plugin is deleted', 'gridsmith' ); ?></label>
							<p class="description"><?php esc_html_e( 'Leave this off if you are replacing the Free version with Pro — your settings and history are kept. Your products are never deleted.', 'gridsmith' ); ?></p>
						</td>
					</tr>
				</table>
				<?php submit_button(); ?>
			</form>
		</div>
		<?php
	}
}