<?php
/**
 * wp-admin navigation for Aivastark Widget: a top-level "Aivastark" menu with
 * Home / Customize Widget / Settings.
 *
 * @package Aivastark_Widget
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class Aivastark_Widget_Admin_Menu {

	const SLUG_HOME      = 'aivastark';
	const SLUG_CUSTOMIZE = 'aivastark-customize';
	const SLUG_SETTINGS  = 'aivastark-settings';

	public static function init() {
		add_action( 'admin_menu', array( __CLASS__, 'register' ) );
		add_action( 'admin_enqueue_scripts', array( __CLASS__, 'enqueue_assets' ) );
		add_action( 'admin_notices', array( __CLASS__, 'maybe_notices' ) );
		add_action( 'admin_post_aivastark_personalize', array( __CLASS__, 'handle_personalize' ) );
	}

	/**
	 * One-click enable/disable for logged-in-visitor personalization, from the
	 * Home screen card. The same value is editable on the Settings screen; this
	 * exists so turning it on is a single click rather than a form round trip.
	 */
	public static function handle_personalize() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'You are not allowed to do that.', 'aivastark-widget' ), '', array( 'response' => 403 ) );
		}
		check_admin_referer( 'aivastark_personalize' );

		$enable = ! empty( $_POST['enable'] );
		Aivastark_Widget_Options::update( array( 'personalize_users' => $enable ) );

		wp_safe_redirect(
			add_query_arg(
				'aivastark_notice',
				$enable ? 'personalize_on' : 'personalize_off',
				admin_url( 'admin.php?page=' . self::SLUG_HOME )
			)
		);
		exit;
	}

	public static function register() {
		add_menu_page(
			__( 'Aivastark', 'aivastark-widget' ),
			__( 'Aivastark', 'aivastark-widget' ),
			'manage_options',
			self::SLUG_HOME,
			array( __CLASS__, 'render_home' ),
			'dashicons-format-chat',
			58
		);
		add_submenu_page(
			self::SLUG_HOME,
			__( 'Home', 'aivastark-widget' ),
			__( 'Home', 'aivastark-widget' ),
			'manage_options',
			self::SLUG_HOME,
			array( __CLASS__, 'render_home' )
		);
		add_submenu_page(
			self::SLUG_HOME,
			__( 'Customize Widget', 'aivastark-widget' ),
			__( 'Customize Widget', 'aivastark-widget' ),
			'manage_options',
			self::SLUG_CUSTOMIZE,
			array( __CLASS__, 'render_customize' )
		);
		add_submenu_page(
			self::SLUG_HOME,
			__( 'Settings', 'aivastark-widget' ),
			__( 'Settings', 'aivastark-widget' ),
			'manage_options',
			self::SLUG_SETTINGS,
			array( __CLASS__, 'render_settings' )
		);
	}

	/**
	 * Only load the admin CSS/JS on our own screens.
	 */
	public static function enqueue_assets( $hook ) {
		if ( false === strpos( (string) $hook, 'aivastark' ) ) {
			return;
		}
		wp_enqueue_style(
			'aivastark-admin',
			AIVASTARK_WIDGET_URL . 'admin/assets/admin.css',
			array(),
			AIVASTARK_WIDGET_VERSION
		);
		wp_enqueue_script(
			'aivastark-admin',
			AIVASTARK_WIDGET_URL . 'admin/assets/admin.js',
			array(),
			AIVASTARK_WIDGET_VERSION,
			true
		);
	}

	/**
	 * Surface connect/disconnect outcomes as dismissible notices on our pages.
	 */
	public static function maybe_notices() {
		$page = isset( $_GET['page'] ) ? sanitize_text_field( wp_unslash( $_GET['page'] ) ) : '';
		if ( false === strpos( $page, 'aivastark' ) ) {
			return;
		}

		if ( isset( $_GET['aivastark_notice'] ) ) {
			$notice = sanitize_text_field( wp_unslash( $_GET['aivastark_notice'] ) );
			$msg    = '';
			if ( 'connected' === $notice ) {
				$msg = __( 'Connected to Aivastark. You can now customize your widget below.', 'aivastark-widget' );
			} elseif ( 'disconnected' === $notice ) {
				$msg = __( 'Disconnected from Aivastark.', 'aivastark-widget' );
			} elseif ( 'personalize_on' === $notice ) {
				$msg = __( 'Personalization is on. The assistant now knows who is logged in.', 'aivastark-widget' );
			} elseif ( 'personalize_off' === $notice ) {
				$msg = __( 'Personalization is off. Logged-in visitors are treated as anonymous again.', 'aivastark-widget' );
			}
			if ( $msg ) {
				printf( '<div class="notice notice-success is-dismissible"><p>%s</p></div>', esc_html( $msg ) );
			}
		}

		if ( isset( $_GET['aivastark_error'] ) ) {
			$code = sanitize_text_field( wp_unslash( $_GET['aivastark_error'] ) );
			$map  = array(
				'denied'   => __( 'Connection cancelled.', 'aivastark-widget' ),
				'missing'  => __( 'The connection response was incomplete. Please try again.', 'aivastark-widget' ),
				'state'    => __( 'The connection link expired or was invalid. Please click Connect again.', 'aivastark-widget' ),
				'exchange' => __( 'Could not complete the connection with Aivastark. Please try again.', 'aivastark-widget' ),
			);
			$msg = isset( $map[ $code ] ) ? $map[ $code ] : __( 'Something went wrong connecting to Aivastark.', 'aivastark-widget' );
			printf( '<div class="notice notice-error is-dismissible"><p>%s</p></div>', esc_html( $msg ) );
		}
	}

	public static function render_home() {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}
		require AIVASTARK_WIDGET_PATH . 'admin/views/page-home.php';
	}

	public static function render_customize() {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}
		require AIVASTARK_WIDGET_PATH . 'admin/views/page-customize.php';
	}

	public static function render_settings() {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}
		require AIVASTARK_WIDGET_PATH . 'admin/views/page-settings.php';
	}
}