<?php
/* Portions derived from NoAdCode (https://noadcode.com), GPL v2 or later. */

if (!defined('ABSPATH')) {
    exit;
}

class AdGhost_Placement_State {
    
    
    private static $inserted_blocks = [];
    
    
    private static $processed_content = [];
    
    
    private static $request_id = null;
    
    
    public static function start_request() {
        self::$request_id = uniqid('adghost_', true);
        self::$inserted_blocks = [];
        self::$processed_content = [];
    }
    
    
    public static function is_block_inserted($block_id, $zone = 'content') {
        $key = $zone . '_' . $block_id;
        return isset(self::$inserted_blocks[$key]);
    }
    
    
    public static function mark_block_inserted($block_id, $zone = 'content', $meta = []) {
        $key = $zone . '_' . $block_id;
        self::$inserted_blocks[$key] = array_merge([
            'block_id' => $block_id,
            'zone' => $zone,
            'timestamp' => microtime(true),
        ], $meta);
    }
    
    
    public static function is_content_processed($hash) {
        return isset(self::$processed_content[$hash]);
    }
    
    
    public static function get_processed_content($hash) {
        return self::$processed_content[$hash] ?? null;
    }
    
    
    public static function mark_content_processed($hash, $content) {
        self::$processed_content[$hash] = $content;
    }
    
    
    public static function get_inserted_blocks() {
        return self::$inserted_blocks;
    }
    
    
    public static function get_zone_count($zone) {
        
        
        
        $count = 0;
        foreach (self::$inserted_blocks as $data) {
            if (($data['zone'] ?? null) === $zone) {
                $count++;
            }
        }
        return $count;
    }
    
    
    public static function export_audit() {
        $blocks = [];
        foreach (self::$inserted_blocks as $key => $data) {
            $blocks[] = array_merge(['key' => $key], $data);
        }
        return [
            'request_id' => self::$request_id,
            'total'      => count($blocks),
            'by_zone'    => [
                'content' => self::get_zone_count('content'),
                'header'  => self::get_zone_count('header'),
                'footer'  => self::get_zone_count('footer'),
                'sidebar' => self::get_zone_count('sidebar'),
            ],
            'blocks'     => $blocks,
        ];
    }

    
    public static function reset() {
        self::$inserted_blocks = [];
        self::$processed_content = [];
        self::$request_id = null;
    }
}