<?php
defined( 'ABSPATH' ) || exit;

/**
 * Class AISP_Customer_Activity_Settings
 *
 * Registers and exposes all plugin options.
 * The settings UI is rendered by AISP_Customer_Activity_Menu (tab 2).
 *
 * Options:
 *   aisp_ca_activity_hours    (int)   default 72  — 0 = All (no limit)
 *   aisp_ca_widget_limit      (int)   default 5
 *   aisp_ca_online_hours      (int)   default 1
 *   aisp_ca_refresh_interval  (int)   default 300 — set 0 to disable auto-refresh
 *   aisp_ca_tracked_roles     (array) default ['customer']
 *   aisp_ca_widget_columns    (array) default all selectable columns
 *   aisp_ca_page_columns      (array) default all selectable columns
 */
class AISP_Customer_Activity_Settings {

	const OPTION_GRP = 'aisp_ca_options';

	/** WordPress built-in roles never tracked. */
	const EXCLUDED_ROLES = [ 'administrator', 'editor', 'author', 'contributor', 'subscriber', 'translator', 'shop_manager' ];

	public static function init() {
		add_action( 'admin_init', [ __CLASS__, 'register_settings' ] );
	}

	// -------------------------------------------------------------------------
	// Public helpers
	// -------------------------------------------------------------------------

	/**
	 * All configurable display columns (excludes online_status and name which are always shown).
	 */
	public static function available_columns(): array {
		return [
			'company'       => __( 'Company',       'aisp-customer-activity' ),
			'cart_items'    => __( 'Cart (items)',   'aisp-customer-activity' ),
			'cart_total'    => __( 'Cart (total)',   'aisp-customer-activity' ),
			'last_activity' => __( 'Last Activity', 'aisp-customer-activity' ),
		];
	}

	/**
	 * Always-visible columns — hardcoded, not user-configurable.
	 */
	public static function always_visible_columns(): array {
		return [ 'online_status', 'name' ];
	}

	/**
	 * Full ordered column list for a given context (always-visible + user-selected).
	 * always_visible_columns are prepended and never duplicated.
	 */
	public static function get_columns( string $context ): array {
		$saved    = get_option( "aisp_ca_{$context}_columns", [] );
		$selected = ! empty( $saved ) ? (array) $saved : array_keys( self::available_columns() );
		// Strip any always-visible keys that might be stored from an older version.
		$selected = array_values( array_diff( $selected, self::always_visible_columns() ) );
		return array_merge( self::always_visible_columns(), $selected );
	}

	/** Roles available for tracking (excludes WP core roles). */
	public static function get_trackable_roles(): array {
		$all     = wp_roles()->roles;
		$exclude = self::EXCLUDED_ROLES;
		return array_filter( $all, fn( $slug ) => ! in_array( $slug, $exclude, true ), ARRAY_FILTER_USE_KEY );
	}

	/** Currently configured tracked roles. */
	public static function get_tracked_roles(): array {
		$saved = get_option( 'aisp_ca_tracked_roles', [] );
		return ! empty( $saved ) ? (array) $saved : [ 'customer' ];
	}

	/** Sanitize a checkbox array against an allowed list. */
	public static function sanitize_checkbox_array( $input, array $allowed ): array {
		if ( ! is_array( $input ) ) {
			return [];
		}
		return array_values( array_intersect( array_map( 'sanitize_key', $input ), $allowed ) );
	}

	/** Sanitize callback for the aisp_ca_tracked_roles option. */
	public static function sanitize_tracked_roles( $input ): array {
		$allowed_roles = array_keys( self::get_trackable_roles() );
		return self::sanitize_checkbox_array( $input, $allowed_roles );
	}

	/** Sanitize callback for the aisp_ca_widget_columns option. */
	public static function sanitize_widget_columns( $input ): array {
		$allowed_columns = array_keys( self::available_columns() );
		return self::sanitize_checkbox_array( $input, $allowed_columns );
	}

	/** Sanitize callback for the aisp_ca_page_columns option. */
	public static function sanitize_page_columns( $input ): array {
		$allowed_columns = array_keys( self::available_columns() );
		return self::sanitize_checkbox_array( $input, $allowed_columns );
	}

	// -------------------------------------------------------------------------
	// Register settings (WordPress Settings API)
	// -------------------------------------------------------------------------

	public static function register_settings() {

		register_setting( self::OPTION_GRP, 'aisp_ca_activity_hours',   [ 'type' => 'integer', 'default' => 72,  'sanitize_callback' => 'absint' ] );
		register_setting( self::OPTION_GRP, 'aisp_ca_widget_limit',     [ 'type' => 'integer', 'default' => 5,   'sanitize_callback' => 'absint' ] );
		register_setting( self::OPTION_GRP, 'aisp_ca_online_minutes',   [ 'type' => 'integer', 'default' => 5,   'sanitize_callback' => 'absint' ] );
		register_setting( self::OPTION_GRP, 'aisp_ca_refresh_interval', [ 'type' => 'integer', 'default' => 300, 'sanitize_callback' => 'absint' ] );

		register_setting( self::OPTION_GRP, 'aisp_ca_tracked_roles',
			[ 'type' => 'array', 'sanitize_callback' => [ __CLASS__, 'sanitize_tracked_roles' ] ]
		);
		register_setting( self::OPTION_GRP, 'aisp_ca_widget_columns',
			[ 'type' => 'array', 'sanitize_callback' => [ __CLASS__, 'sanitize_widget_columns' ] ]
		);
		register_setting( self::OPTION_GRP, 'aisp_ca_page_columns',
			[ 'type' => 'array', 'sanitize_callback' => [ __CLASS__, 'sanitize_page_columns' ] ]
		);
	}
}