<?php

defined('ABSPATH') || exit;

class AIEO_Action_Telemetry {

	
	const OPT_CONSENT = 'aieo_action_telemetry_consent';

	
	const OPT_COUNTS = 'aieo_action_telemetry_counts';

	
	const MAX_IDS = 800;

	
	public static function init() {
		add_action('wp_ajax_aieo_action_telemetry', array(__CLASS__, 'ajax_collect'));
		add_action('wp_ajax_aieo_action_help', array(__CLASS__, 'ajax_help'));
		add_action('wp_ajax_aieo_usage_sharing_optin', array(__CLASS__, 'ajax_consent'));
	}

	
	public static function ajax_consent() {
		check_ajax_referer('aieo_usage_sharing_optin', 'nonce');
		if (!current_user_can('install_plugins')) {
			wp_send_json_error(array('cap' => false), 403);
		}
		$mode = isset($_POST['mode']) ? sanitize_key(wp_unslash($_POST['mode'])) : '';

		if ('grant' === $mode) {
			if (!class_exists('AIEO_DMM_Module_Base') || !AIEO_DMM_Module_Base::is_aieo_pro_user()) {
				
				
				wp_send_json_error(array('pro' => false), 403);
			}
			self::grant_consent();
			wp_send_json_success(array('collecting' => self::is_collecting()));
		}

		if ('revoke' === $mode) {
			self::revoke_consent();
			wp_send_json_success(array('collecting' => false));
		}

		wp_send_json_error(array('mode' => false), 400);
	}

	
	public static function ajax_help() {
		check_ajax_referer('aieo_action_help', 'nonce');
		if (!current_user_can('manage_woocommerce') && !current_user_can('manage_options')) {
			wp_send_json_error(array('cap' => false), 403);
		}

		$id  = isset($_GET['id']) ? sanitize_text_field(wp_unslash($_GET['id'])) : '';
		$tab = isset($_GET['tab']) ? sanitize_key(wp_unslash($_GET['tab'])) : '';
		if ($id === '') { wp_send_json_error(array('id' => false), 400); }

		$row = class_exists('AIEO_Capability_Registry')
			? AIEO_Capability_Registry::action($id)
			: null;
		$doc = class_exists('AIEO_Docs_Registry')
			? AIEO_Docs_Registry::for_action($id, $tab, self::doc_lang())
			: null;

		wp_send_json_success(array(
			'id'    => $id,
			'label' => $row && !empty($row['label']) ? (string) $row['label'] : '',
			'description' => $row && !empty($row['description']) ? (string) $row['description'] : '',
			
			
			'informs_customer' => $row ? !empty($row['informs_customer']) : false,
			'confirm' => $row && !empty($row['confirm']) ? (string) $row['confirm'] : '',
			'url'     => $doc && !empty($doc['url']) ? (string) $doc['url'] : '',
			'matched' => $doc && !empty($doc['matched']) ? (string) $doc['matched'] : '',
		));
	}

	
	private static function doc_lang() {
		$locale = function_exists('get_user_locale') ? get_user_locale() : get_locale();
		$lang   = strtolower(substr((string) $locale, 0, 2));
		return $lang !== '' ? $lang : 'en';
	}

	
	public static function is_collecting() {
		if (!class_exists('AIEO_DMM_Module_Base') || !AIEO_DMM_Module_Base::is_aieo_pro_user()) {
			return false;
		}
		$consent = get_option(self::OPT_CONSENT);
		if (!is_array($consent) || empty($consent['at'])) { return false; }

		
		return (bool) apply_filters('aieo_collect_action_usage', true);
	}

	
	public static function grant_consent($user_id = 0) {
		$user_id = $user_id ? (int) $user_id : get_current_user_id();
		update_option(self::OPT_CONSENT, array(
			'user'    => $user_id,
			
			
			
			'at'      => gmdate('Y-m-d H:i:s') . ' UTC',
			'version' => defined('AIEO_VERSION') ? AIEO_VERSION : '',
		), false);
	}

	
	public static function revoke_consent() {
		delete_option(self::OPT_CONSENT);
		delete_option(self::OPT_COUNTS);
	}

	
	public static function script_config($page_id = '') {
		$on = self::is_collecting();
		
		
		
		
		return array(
			'page'     => (string) $page_id,
			'collect'  => $on,
			'endpoint' => $on ? admin_url('admin-ajax.php') : '',
			'nonce'    => $on ? wp_create_nonce('aieo_action_telemetry') : '',
			'debug'    => (defined('WP_DEBUG') && WP_DEBUG),
			
			'help'      => admin_url('admin-ajax.php'),
			'helpNonce' => wp_create_nonce('aieo_action_help'),
			'i18n'      => array(
				'help'    => __('What does this do?', 'ai-eshop-optimizer'),
				'emails'  => __('This emails the customer.', 'ai-eshop-optimizer'),
				'asks'    => __('Asks first:', 'ai-eshop-optimizer'),
				'manual'  => __('Read the manual', 'ai-eshop-optimizer'),
				'nothing' => __('This control is not documented yet.', 'ai-eshop-optimizer'),
			),
		);
	}

	
	public static function ajax_collect() {
		if (!self::is_collecting()) { wp_send_json_error(array('gated' => true), 403); }
		check_ajax_referer('aieo_action_telemetry', 'nonce');
		if (!current_user_can('manage_woocommerce') && !current_user_can('manage_options')) {
			wp_send_json_error(array('cap' => false), 403);
		}

		$raw = isset($_POST['events']) ? wp_unslash($_POST['events']) : '';
		$events = json_decode((string) $raw, true);
		if (!is_array($events)) { wp_send_json_error(array('parse' => false), 400); }

		$counts = get_option(self::OPT_COUNTS);
		if (!is_array($counts)) { $counts = array(); }

		$today = gmdate('Y-m-d');
		$n = 0;
		foreach ($events as $ev) {
			if (!is_array($ev) || empty($ev['id'])) { continue; }
			
			
			
			$id = sanitize_text_field((string) $ev['id']);
			if ($id === '' || strlen($id) > 96) { continue; }
			if (!empty($ev['variant'])) {
				$v = sanitize_key((string) $ev['variant']);
				if ($v !== '') { $id .= ':' . $v; }
			}
			if (!isset($counts[$id]) && count($counts) >= self::MAX_IDS) { continue; }
			if (!isset($counts[$id])) { $counts[$id] = array('n' => 0, 'last' => ''); }
			$counts[$id]['n']++;
			$counts[$id]['last'] = $today;
			$n++;
			if ($n >= 200) { break; }
		}

		update_option(self::OPT_COUNTS, $counts, false);
		wp_send_json_success(array('recorded' => $n));
	}

	
	public static function usage_report() {
		$counts = get_option(self::OPT_COUNTS);
		if (!is_array($counts)) { $counts = array(); }

		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		$all = array();
		$rows = array();
		if (class_exists('AIEO_Capability_Registry') && is_callable(array('AIEO_Capability_Registry', 'actions_index'))) {
			$rows = AIEO_Capability_Registry::actions_index();
		} else {
			
			
			$root = defined('AIEO_PLUGIN_DIR') ? AIEO_PLUGIN_DIR : dirname(dirname(__DIR__)) . '/';
			foreach (array('includes/dmm/data/actions-index.json', 'docs/actions-index.json') as $rel) {
				$path = rtrim((string) $root, '/\\') . '/' . $rel;
				if (!is_readable($path)) { continue; }
				$raw = json_decode((string) file_get_contents($path), true);
				if (isset($raw['actions']) && is_array($raw['actions'])) {
					$rows = $raw['actions'];
					break;
				}
			}
		}
		foreach ((array) $rows as $row) {
			if (!empty($row['id'])) { $all[(string) $row['id']] = $row; }
		}

		$used = $never = array();
		foreach ($all as $id => $row) {
			
			
			$hits = 0;
			foreach ($counts as $key => $c) {
				if ($key === $id || strpos($key, $id . ':') === 0) { $hits += (int) $c['n']; }
			}
			if ($hits > 0) { $used[$id] = $hits; } else { $never[] = $id; }
		}
		arsort($used);
		return array('used' => $used, 'never' => $never, 'total' => count($all));
	}
}