<?php
/**
 * Plugin orchestrator (singleton). Loads components, owns options, and wires up
 * activation/deactivation.
 *
 * @package Aiso_AI_Crawler_Analytics
 */

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

class Aiso_Analytics {

	/**
	 * Singleton instance.
	 *
	 * @var Aiso_Analytics|null
	 */
	private static $instance = null;

	/**
	 * Cached, merged options.
	 *
	 * @var array<string,mixed>|null
	 */
	private static $options = null;

	/** @var Aiso_Tracker */
	public $tracker;

	/** @var Aiso_Sync */
	public $sync;

	/** @var Aiso_Cache */
	public $cache;

	/** @var Aiso_Settings|null */
	public $settings = null;

	/** @var Aiso_Admin|null */
	public $admin = null;

	/**
	 * Get (and lazily build) the singleton.
	 *
	 * @return Aiso_Analytics
	 */
	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	private function __construct() {
		$this->maybe_upgrade();

		// Always-on: collection + central sync. The cache layer must be wired before
		// the request is served so AI-bot requests bypass full-page caches and reach
		// the tracker (otherwise cache HITs exit before `init` and the hit is lost).
		$this->sync    = new Aiso_Sync();
		$this->cache   = new Aiso_Cache();
		$this->tracker = new Aiso_Tracker();

		// Admin-only UI.
		if ( is_admin() ) {
			$this->settings = new Aiso_Settings();
			$this->admin    = new Aiso_Admin();
		}
	}

	/**
	 * Default option values.
	 *
	 * @return array<string,mixed>
	 */
	public static function default_options() {
		return array(
			'api_key'        => '',
			'sync_enabled'   => 0,
			'track_all_bots' => 0,
			'anonymize_ip'   => 1,
			'retention_days' => 90,
			'endpoint_base'  => '',
			'bypass_cache_for_ai_bots' => 1,
			'remove_data_on_uninstall' => 0,
		);
	}

	/**
	 * All options, merged over defaults.
	 *
	 * @return array<string,mixed>
	 */
	public static function options() {
		if ( null === self::$options ) {
			$stored        = get_option( Aiso_Settings::OPTION, array() );
			self::$options = wp_parse_args( is_array( $stored ) ? $stored : array(), self::default_options() );
		}
		return self::$options;
	}

	/**
	 * One option value.
	 *
	 * @param string $key     Option key.
	 * @param mixed  $default Fallback.
	 * @return mixed
	 */
	public static function option( $key, $default = null ) {
		$options = self::options();
		return array_key_exists( $key, $options ) ? $options[ $key ] : $default;
	}

	/**
	 * Re-run table install if the DB schema version changed.
	 */
	private function maybe_upgrade() {
		if ( get_option( 'aiso_db_version' ) !== Aiso_Store::DB_VERSION ) {
			Aiso_Store::install();
		}
	}

	/**
	 * Activation: create the table, seed defaults, schedule sync.
	 */
	public static function activate() {
		Aiso_Store::install();

		if ( false === get_option( Aiso_Settings::OPTION ) ) {
			add_option( Aiso_Settings::OPTION, self::default_options() );
		}
		if ( false === get_option( 'aiso_ip_salt' ) ) {
			add_option( 'aiso_ip_salt', wp_generate_password( 32, false, false ), '', false );
		}

		Aiso_Sync::schedule();

		// Push our AI-bot UAs into WP Rocket's baked cache config straight away, so
		// cache bypass is live without waiting for the first settings save.
		Aiso_Cache::refresh_cache_rules();
	}

	/**
	 * Deactivation: stop the cron.
	 */
	public static function deactivate() {
		Aiso_Sync::unschedule();
	}
}