<?php
/**
 * Dashboard overview page + option-group list table makeover.
 *
 * @package ShapeOptions
 */

defined( 'ABSPATH' ) || exit;

/**
 * ShapeOptions → Dashboard: one screen that answers "what is set up and
 * where do I go next" — group/field stats, recent groups, store status
 * checklist and quick actions. Also replaces the bare post-type list
 * table with informative columns (fields, targeting, placement) so the
 * CPT screen stops looking like a plain post list.
 */
if ( ! class_exists( 'Shapeoptions_Dashboard' ) ) :

class Shapeoptions_Dashboard {

	/**
	 * Cached overview figures. Rebuilt whenever a group changes, so the daily
	 * expiry is only a backstop for a write path that skips the post hooks.
	 */
	const STATS_TRANSIENT = 'shapeoptions_dashboard_stats';

	/**
	 * Template library — used for the templates count stat.
	 *
	 * @var Shapeoptions_Templates
	 */
	private $templates;

	/**
	 * Hook up.
	 *
	 * @param Shapeoptions_Templates $templates Template library instance.
	 */
	public function __construct( $templates ) {
		$this->templates = $templates;

		add_action( 'admin_menu', array( $this, 'menu' ), 5 );
		add_action( 'admin_menu', array( $this, 'reorder_menu' ), 99 );
		add_action( 'admin_enqueue_scripts', array( $this, 'assets' ) );

		add_filter( 'manage_shapeoptions_group_posts_columns', array( $this, 'columns' ) );
		add_action( 'manage_shapeoptions_group_posts_custom_column', array( $this, 'column_content' ), 10, 2 );

		add_action( 'save_post_shapeoptions_group', array( __CLASS__, 'flush_stats' ) );
		add_action( 'deleted_post', array( __CLASS__, 'flush_stats_for_post' ), 10, 2 );
		add_action( 'trashed_post', array( __CLASS__, 'flush_stats_for_post' ) );
		add_action( 'untrashed_post', array( __CLASS__, 'flush_stats_for_post' ) );
	}

	/**
	 * Drop the cached overview figures.
	 */
	public static function flush_stats() {
		delete_transient( self::STATS_TRANSIENT );
	}

	/**
	 * Drop them only for option groups — these hooks fire for every post type.
	 *
	 * @param int          $post_id Post ID.
	 * @param WP_Post|null $post    Post object, when the action supplies one.
	 */
	public static function flush_stats_for_post( $post_id, $post = null ) {
		$post_type = $post instanceof WP_Post ? $post->post_type : get_post_type( $post_id );

		if ( 'shapeoptions_group' === $post_type ) {
			self::flush_stats();
		}
	}

	/**
	 * Register the dashboard page.
	 */
	public function menu() {
		add_submenu_page(
			'edit.php?post_type=shapeoptions_group',
			__( 'ShapeOptions Dashboard', 'shapeoptions' ),
			__( 'Dashboard', 'shapeoptions' ),
			'manage_woocommerce',
			'shapeoptions-dashboard',
			array( $this, 'render_page' )
		);
	}

	/**
	 * Put submenu items in a deliberate order: Dashboard first, then
	 * groups, then tools. Unknown (add-on) slugs keep their
	 * relative order after the known ones they follow.
	 */
	public function reorder_menu() {
		global $submenu;

		$parent = 'edit.php?post_type=shapeoptions_group';
		if ( empty( $submenu[ $parent ] ) ) {
			return;
		}

		$order = array(
			'shapeoptions-dashboard',
			'edit.php?post_type=shapeoptions_group',
			'post-new.php?post_type=shapeoptions_group',
			'shapeoptions-templates',
			'shapeoptions-style-settings',
			'shapeoptions-import-export',
		);

		usort(
			$submenu[ $parent ],
			function ( $a, $b ) use ( $order ) {
				$pa = array_search( $a[2], $order, true );
				$pb = array_search( $b[2], $order, true );
				$pa = ( false === $pa ) ? 50 : $pa;
				$pb = ( false === $pb ) ? 50 : $pb;
				return $pa <=> $pb;
			}
		);

		// "Option Groups" reads better as "All Groups" next to Dashboard.
		foreach ( $submenu[ $parent ] as &$item ) {
			if ( 'edit.php?post_type=shapeoptions_group' === $item[2] ) {
				$item[0] = __( 'All Groups', 'shapeoptions' );
			}
		}
		unset( $item );
	}

	/**
	 * Load the dashboard CSS where needed.
	 *
	 * @param string $hook Current admin page hook suffix.
	 */
	public function assets( $hook ) {
		$screen  = get_current_screen();
		$is_dash = 'shapeoptions_group_page_shapeoptions-dashboard' === $hook;
		$is_list = $screen && 'edit-shapeoptions_group' === $screen->id;

		if ( ! $is_dash && ! $is_list ) {
			return;
		}

		wp_enqueue_style(
			'shapeoptions-admin-dashboard',
			SHAPEOPTIONS_URL . 'assets/css/shapeoptions-admin-dashboard.css',
			array(),
			shapeoptions_asset_version( SHAPEOPTIONS_PATH . 'assets/css/shapeoptions-admin-dashboard.css', SHAPEOPTIONS_VERSION )
		);
	}

	/* ---------------------------------------------------------------
	 * List table columns.
	 * ------------------------------------------------------------- */

	/**
	 * Replace the bare columns with an informative set.
	 *
	 * @param array $columns Default columns.
	 * @return array
	 */
	public function columns( $columns ) {
		return array(
			'cb'           => $columns['cb'],
			'title'        => __( 'Group', 'shapeoptions' ),
			'shapeoptions_status'    => __( 'Status', 'shapeoptions' ),
			'shapeoptions_fields'    => __( 'Fields', 'shapeoptions' ),
			'shapeoptions_applies'   => __( 'Shows on', 'shapeoptions' ),
			'shapeoptions_placement' => __( 'Placement', 'shapeoptions' ),
			'date'         => __( 'Date', 'shapeoptions' ),
		);
	}

	/**
	 * Translated label for a group's post status.
	 *
	 * Shared by the list table and the dashboard's recent-groups table, which
	 * used to carry two different versions of this — and the second one fell
	 * back to `ucfirst( $status )`, i.e. it printed the raw English status
	 * slug. On a translated admin that is the one word on the screen that
	 * stays in English.
	 *
	 * Anything outside ShapeOptions's own four wordings falls back to the
	 * status object's label, which WordPress has already translated, and only
	 * then to the slug.
	 *
	 * @param string $status Post status slug.
	 * @return string
	 */
	public static function status_label( $status ) {
		$labels = array(
			'publish' => __( 'Live', 'shapeoptions' ),
			'draft'   => __( 'Draft', 'shapeoptions' ),
			'pending' => __( 'Pending', 'shapeoptions' ),
			'trash'   => __( 'Trash', 'shapeoptions' ),
		);

		if ( isset( $labels[ $status ] ) ) {
			return $labels[ $status ];
		}

		$object = get_post_status_object( $status );

		return ( $object && ! empty( $object->label ) ) ? $object->label : ucfirst( $status );
	}

	/**
	 * Render our custom column cells.
	 *
	 * @param string $column  Column key.
	 * @param int    $post_id Group ID.
	 */
	public function column_content( $column, $post_id ) {
		switch ( $column ) {
			case 'shapeoptions_status':
				$status = get_post_status( $post_id );
				printf(
					'<span class="shapeoptions-badge shapeoptions-badge--%s">%s</span>',
					esc_attr( $status ),
					esc_html( self::status_label( $status ) )
				);
				break;

			case 'shapeoptions_fields':
				$fields = get_post_meta( $post_id, '_shapeoptions_fields', true );
				$fields = is_array( $fields ) ? $fields : array();
				$types  = array();
				foreach ( $fields as $field ) {
					if ( ! empty( $field['type'] ) ) {
						$types[ $field['type'] ] = true;
					}
				}
				$types = array_keys( $types );

				$plugin      = shapeoptions();
				$type_labels = $plugin ? $plugin->fields->get_labels() : array();

				printf( '<strong class="shapeoptions-count">%d</strong> ', count( $fields ) );
				foreach ( array_slice( $types, 0, 4 ) as $type ) {
					printf( '<span class="shapeoptions-chip">%s</span>', esc_html( $type_labels[ $type ] ?? $type ) );
				}
				if ( count( $types ) > 4 ) {
					printf( '<span class="shapeoptions-chip shapeoptions-chip--more">+%d</span>', count( $types ) - 4 );
				}
				break;

			case 'shapeoptions_applies':
				echo esc_html( $this->applies_summary( $post_id ) );
				break;

			case 'shapeoptions_placement':
				$placement = get_post_meta( $post_id, '_shapeoptions_placement', true ) ?: 'before';
				echo esc_html(
					'after' === $placement
						? __( 'After Add to Cart', 'shapeoptions' )
						: __( 'Before Add to Cart', 'shapeoptions' )
				);
				break;
		}
	}

	/**
	 * Human summary of a group's "Show on" conditions.
	 *
	 * @param int $post_id Group ID.
	 * @return string
	 */
	private function applies_summary( $post_id ) {
		$conditions = get_post_meta( $post_id, '_shapeoptions_conditions', true );
		$type       = is_array( $conditions ) && ! empty( $conditions['type'] ) ? $conditions['type'] : 'all';
		$ids        = is_array( $conditions ) && ! empty( $conditions['ids'] ) ? (array) $conditions['ids'] : array();
		$count      = count( $ids );

		switch ( $type ) {
			case 'products':
				/* translators: %d: number of products. */
				return sprintf( _n( '%d product', '%d products', $count, 'shapeoptions' ), $count );
			case 'categories':
				/* translators: %d: number of categories. */
				return sprintf( _n( '%d category', '%d categories', $count, 'shapeoptions' ), $count );
			case 'tags':
				/* translators: %d: number of tags. */
				return sprintf( _n( '%d tag', '%d tags', $count, 'shapeoptions' ), $count );
			default:
				return __( 'All products', 'shapeoptions' );
		}
	}

	/* ---------------------------------------------------------------
	 * Dashboard page.
	 * ------------------------------------------------------------- */

	/**
	 * Gather everything the overview shows. Public so it is testable.
	 *
	 * @return array
	 */
	public function get_stats() {
		$cached = get_transient( self::STATS_TRANSIENT );
		if ( is_array( $cached ) ) {
			
			$cached['templates'] = count( $this->templates->get_templates() );
			return $cached;
		}

		$counts = wp_count_posts( 'shapeoptions_group' );

		$stats = array(
			'published'   => (int) $counts->publish,
			'drafts'      => (int) $counts->draft,
			'fields'      => 0,
			'priced'      => 0,
			'type_usage'  => array(),
			'templates'   => count( $this->templates->get_templates() ),
		);

		$batch  = 200;
		$offset = 0;

		do {
			$group_ids = get_posts(
				array(
					'post_type'              => 'shapeoptions_group',
					'post_status'            => array( 'publish', 'draft', 'pending' ),
					'posts_per_page'         => $batch,
					'offset'                 => $offset,
					'orderby'                => 'ID',
					'order'                  => 'ASC',
					'fields'                 => 'ids',
					'no_found_rows'          => true,
					'update_post_term_cache' => false,
				)
			);

			if ( $group_ids ) {
				// All of the batch's meta in one query, rather than one per group.
				update_postmeta_cache( $group_ids );
			}

			foreach ( $group_ids as $group_id ) {
				$fields = get_post_meta( $group_id, '_shapeoptions_fields', true );
				if ( ! is_array( $fields ) ) {
					continue;
				}

				foreach ( $fields as $field ) {
					$stats['fields']++;

					$type = ! empty( $field['type'] ) ? $field['type'] : 'text';
					if ( ! isset( $stats['type_usage'][ $type ] ) ) {
						$stats['type_usage'][ $type ] = 0;
					}
					$stats['type_usage'][ $type ]++;

					if ( ! empty( $field['price'] ) ) {
						$stats['priced']++;
					} else {
						foreach ( (array) ( $field['choices'] ?? array() ) as $choice ) {
							if ( ! empty( $choice['price'] ) ) {
								$stats['priced']++;
								break;
							}
						}
					}
				}
			}

			$offset += $batch;
		} while ( count( $group_ids ) === $batch );

		arsort( $stats['type_usage'] );

		set_transient( self::STATS_TRANSIENT, $stats, DAY_IN_SECONDS );

		return $stats;
	}

	/**
	 * Recent groups for the overview table.
	 *
	 * @return WP_Post[]
	 */
	private function recent_groups() {
		return get_posts(
			array(
				'post_type'              => 'shapeoptions_group',
				'post_status'            => array( 'publish', 'draft', 'pending' ),
				'posts_per_page'         => 6,
				'orderby'                => 'modified',
				'order'                  => 'DESC',
				'no_found_rows'          => true,
				'update_post_term_cache' => false,
			)
		);
	}

	/**
	 * Render the dashboard.
	 */
	public function render_page() {
		$stats  = $this->get_stats();
		$groups = $this->recent_groups();

		$urls = array(
			'new'       => admin_url( 'post-new.php?post_type=shapeoptions_group' ),
			'all'       => admin_url( 'edit.php?post_type=shapeoptions_group' ),
			'templates' => admin_url( 'edit.php?post_type=shapeoptions_group&page=shapeoptions-templates' ),
			'impexp'    => admin_url( 'edit.php?post_type=shapeoptions_group&page=shapeoptions-import-export' ),
		);
		?>
		<div class="wrap shapeoptions-dash">

			<div class="shapeoptions-dash__hero">
				<div>
					<h1>Shape<span>Options</span></h1>
					<p class="shapeoptions-dash__tagline">
						<?php esc_html_e( 'Product options & extra fees for WooCommerce', 'shapeoptions' ); ?>
						<span class="shapeoptions-chip"><?php echo esc_html( 'v' . SHAPEOPTIONS_VERSION ); ?></span>
					</p>
				</div>
				<div class="shapeoptions-dash__hero-actions">
					<a class="button button-primary button-hero" href="<?php echo esc_url( $urls['new'] ); ?>"><?php esc_html_e( '+ New Option Group', 'shapeoptions' ); ?></a>
					<a class="button button-hero" href="<?php echo esc_url( $urls['templates'] ); ?>"><?php esc_html_e( 'Browse Templates', 'shapeoptions' ); ?></a>
				</div>
			</div>

			<div class="shapeoptions-dash__stats">
				<a class="shapeoptions-stat" href="<?php echo esc_url( $urls['all'] ); ?>">
					<span class="shapeoptions-stat__num"><?php echo esc_html( $stats['published'] ); ?></span>
					<span class="shapeoptions-stat__label"><?php esc_html_e( 'Live groups', 'shapeoptions' ); ?></span>
				</a>
				<a class="shapeoptions-stat" href="<?php echo esc_url( $urls['all'] . '&post_status=draft' ); ?>">
					<span class="shapeoptions-stat__num"><?php echo esc_html( $stats['drafts'] ); ?></span>
					<span class="shapeoptions-stat__label"><?php esc_html_e( 'Drafts', 'shapeoptions' ); ?></span>
				</a>
				<div class="shapeoptions-stat">
					<span class="shapeoptions-stat__num"><?php echo esc_html( $stats['fields'] ); ?></span>
					<span class="shapeoptions-stat__label"><?php esc_html_e( 'Fields total', 'shapeoptions' ); ?></span>
				</div>
				<div class="shapeoptions-stat">
					<span class="shapeoptions-stat__num"><?php echo esc_html( $stats['priced'] ); ?></span>
					<span class="shapeoptions-stat__label"><?php esc_html_e( 'Priced fields', 'shapeoptions' ); ?></span>
				</div>
				<a class="shapeoptions-stat" href="<?php echo esc_url( $urls['templates'] ); ?>">
					<span class="shapeoptions-stat__num"><?php echo esc_html( $stats['templates'] ); ?></span>
					<span class="shapeoptions-stat__label"><?php esc_html_e( 'Templates', 'shapeoptions' ); ?></span>
				</a>
			</div>

			<div class="shapeoptions-dash__cols">

				<div class="shapeoptions-dash__main">
					<div class="shapeoptions-panel">
						<h2><?php esc_html_e( 'Recent option groups', 'shapeoptions' ); ?></h2>
						<?php if ( ! $groups ) : ?>
							<p class="shapeoptions-panel__empty">
								<?php esc_html_e( 'No option groups yet — create one, or install a template to see how everything works.', 'shapeoptions' ); ?>
							</p>
							<p>
								<a class="button button-primary" href="<?php echo esc_url( $urls['new'] ); ?>"><?php esc_html_e( 'Create your first group', 'shapeoptions' ); ?></a>
								<a class="button" href="<?php echo esc_url( $urls['templates'] ); ?>"><?php esc_html_e( 'Install a template', 'shapeoptions' ); ?></a>
							</p>
						<?php else : ?>
							<table class="shapeoptions-table">
								<thead>
									<tr>
										<th><?php esc_html_e( 'Group', 'shapeoptions' ); ?></th>
										<th><?php esc_html_e( 'Status', 'shapeoptions' ); ?></th>
										<th><?php esc_html_e( 'Fields', 'shapeoptions' ); ?></th>
										<th><?php esc_html_e( 'Shows on', 'shapeoptions' ); ?></th>
									</tr>
								</thead>
								<tbody>
									<?php foreach ( $groups as $group ) : ?>
										<?php
										$fields = get_post_meta( $group->ID, '_shapeoptions_fields', true );
										$fields = is_array( $fields ) ? $fields : array();
										?>
										<tr>
											<td><a href="<?php echo esc_url( get_edit_post_link( $group->ID ) ); ?>"><strong><?php echo esc_html( $group->post_title ?: __( '(no title)', 'shapeoptions' ) ); ?></strong></a></td>
											<td>
												<span class="shapeoptions-badge shapeoptions-badge--<?php echo esc_attr( $group->post_status ); ?>">
													<?php echo esc_html( self::status_label( $group->post_status ) ); ?>
												</span>
											</td>
											<td><?php echo esc_html( count( $fields ) ); ?></td>
											<td><?php echo esc_html( $this->applies_summary( $group->ID ) ); ?></td>
										</tr>
									<?php endforeach; ?>
								</tbody>
							</table>
							<p><a href="<?php echo esc_url( $urls['all'] ); ?>"><?php esc_html_e( 'View all groups →', 'shapeoptions' ); ?></a></p>
						<?php endif; ?>
					</div>

					<?php if ( $stats['type_usage'] ) : ?>
						<div class="shapeoptions-panel">
							<h2><?php esc_html_e( 'Field types in use', 'shapeoptions' ); ?></h2>
							<p class="shapeoptions-panel__chips">
								<?php foreach ( $stats['type_usage'] as $type => $count ) : ?>
									<span class="shapeoptions-chip shapeoptions-chip--big"><?php echo esc_html( $type ); ?> <b><?php echo esc_html( $count ); ?></b></span>
								<?php endforeach; ?>
							</p>
						</div>
					<?php endif; ?>
				</div>

				<div class="shapeoptions-dash__side">

					<div class="shapeoptions-panel">
						<h2><?php esc_html_e( 'Quick actions', 'shapeoptions' ); ?></h2>
						<ul class="shapeoptions-links">
							<li><a href="<?php echo esc_url( $urls['new'] ); ?>">➕ <?php esc_html_e( 'Add a new option group', 'shapeoptions' ); ?></a></li>
							<li><a href="<?php echo esc_url( $urls['templates'] ); ?>">📦 <?php esc_html_e( 'Template library', 'shapeoptions' ); ?></a></li>
							<li><a href="<?php echo esc_url( $urls['impexp'] ); ?>">🔁 <?php esc_html_e( 'Import / Export groups', 'shapeoptions' ); ?></a></li>
						</ul>
					</div>

				</div>
			</div>
		</div>
		<?php
	}
}

endif;