<?php
/**
 * Main bootstrap: wires together all subsystems.
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

final class ADVK_Plugin {

	/** @var ADVK_Plugin */
	private static $instance = null;

	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	private function __construct() {
		// Top-level menu + statistics dashboard (registers parent menu slug).
		$dashboard = new ADVK_Dashboard();
		$dashboard->hooks();

		// Doors custom post type + meta boxes.
		$doors = new ADVK_Doors_CPT();
		$doors->hooks();

		// Settings page (tweaks + texts + today override).
		$settings = new ADVK_Settings();
		$settings->hooks();

		// Frontend shortcode + asset enqueue.
		$shortcode = new ADVK_Shortcode();
		$shortcode->hooks();

		// AJAX submission handler.
		$ajax = new ADVK_Ajax();
		$ajax->hooks();

		// Admin submissions view.
		$entries_admin = new ADVK_Admin_Entries();
		$entries_admin->hooks();

		// Winner drawing admin page.
		$winners = new ADVK_Winners();
		$winners->hooks();

		// Redesigned admin chrome (branded navigation + "Mitternacht" theme).
		if ( is_admin() ) {
			$admin_ui = new ADVK_Admin_UI();
			$admin_ui->hooks();

			// Custom "Türchen" overview page (grid/list of door cards).
			$doors_admin = new ADVK_Doors_Admin();
			$doors_admin->hooks();

			// Custom door editor (replaces the native CPT edit screen).
			$door_editor = new ADVK_Door_Editor();
			$door_editor->hooks();
		}

		// Confirmation / notification e-mails.
		$emails = new ADVK_Emails();
		$emails->hooks();

		// Gutenberg block.
		$block = new ADVK_Block();
		$block->hooks();

		// DSGVO / GDPR tooling.
		$privacy = new ADVK_Privacy();
		$privacy->hooks();

		// Newsletter provider integration.
		$newsletter = new ADVK_Newsletter();
		$newsletter->hooks();

		// Reminder opt-in + daily cron.
		$reminders = new ADVK_Reminders();
		$reminders->hooks();

		// "Go Pro" pointer (auto-hides when the Pro add-on is active).
		$upsell = new ADVK_Upsell();
		$upsell->hooks();

		// Run on both admin and front end so the schema is migrated before any
		// frontend entry is stored after an in-place update (the version check
		// makes this a no-op once migrated).
		add_action( 'admin_init', array( $this, 'maybe_upgrade_db' ) );
		add_action( 'init', array( $this, 'maybe_upgrade_db' ) );
	}

	/**
	 * Run dbDelta when the stored schema version is behind the plugin version.
	 * Keeps the entries table (e.g. the is_winner column) up to date after an
	 * in-place update without requiring re-activation.
	 */
	public function maybe_upgrade_db() {
		$installed = get_option( 'advk_db_version' );
		if ( ADVK_VERSION !== $installed ) {
			ADVK_Entries::create_table();
			update_option( 'advk_db_version', ADVK_VERSION );
		}

		// Schema revision is tracked separately from the plugin version so table
		// migrations (e.g. the `calendar` column) still run after an in-place
		// update that keeps the same version string. dbDelta only adds what is
		// missing, so this is a no-op once migrated.
		if ( (int) get_option( 'advk_db_schema', 0 ) < ADVK_Entries::SCHEMA ) {
			ADVK_Entries::create_table();
			update_option( 'advk_db_schema', ADVK_Entries::SCHEMA );
		}
	}
}