<?php
/**
 * Cookie Manager — Handles personalization cookies for pixel tracking.
 *
 * Replicates cookie logic from pixel-article.cfm lines 19-129.
 * Cookies: MYARTICLES20228, MYINTERESTS20228, REGION2023
 */
class CookieManager
{
    private const COOKIE_EXPIRY = 43200 * 60; // 43200 minutes = 30 days in seconds

    /**
     * Clear legacy cookie versions (from pixel-article.cfm lines 69-72).
     */
    public static function clearLegacyCookies(): void
    {
        $legacy = ['MYARTICLES2020', 'MYARTICLES20221', 'MYARTICLES2021', 'MYINTERESTS20221'];
        foreach ($legacy as $name) {
            setcookie($name, '', time() - 3600, '/', COOKIE_DOMAIN);
        }
    }

    /**
     * Reset MYINTERESTS20228 if it exceeds 3000 chars (from pixel-article.cfm lines 19-22).
     */
    public static function resetInterestsIfOversized(): void
    {
        if (isset($_COOKIE['MYINTERESTS20228']) && strlen($_COOKIE['MYINTERESTS20228']) > 3000) {
            setcookie('MYINTERESTS20228', '', time() - 3600, '/', COOKIE_DOMAIN);
            setcookie('MYINTERESTS20228', '', time() + self::COOKIE_EXPIRY, '/', COOKIE_DOMAIN);
            unset($_COOKIE['MYINTERESTS20228']);
        }
    }

    /**
     * Update the rolling article history cookie (from pixel-article.cfm lines 74-86).
     * Appends article ID if not already present. Resets if over 2000 chars.
     */
    public static function updateArticleCookie(int $articleId): void
    {
        $idStr = (string)$articleId;

        if (!isset($_COOKIE['MYARTICLES20228'])) {
            setcookie('MYARTICLES20228', $idStr, time() + self::COOKIE_EXPIRY, '/', COOKIE_DOMAIN);
            $_COOKIE['MYARTICLES20228'] = $idStr;
            return;
        }

        $current = $_COOKIE['MYARTICLES20228'];

        // Reset if too long
        if (strlen($current) > 2000) {
            setcookie('MYARTICLES20228', $idStr, time() + self::COOKIE_EXPIRY, '/', COOKIE_DOMAIN);
            $_COOKIE['MYARTICLES20228'] = $idStr;
            return;
        }

        // Only add if not already present
        if (strpos(',' . $current . ',', ',' . $idStr . ',') === false) {
            $newValue = $current . ',' . $idStr;
            setcookie('MYARTICLES20228', $newValue, time() + self::COOKIE_EXPIRY, '/', COOKIE_DOMAIN);
            $_COOKIE['MYARTICLES20228'] = $newValue;
        }
    }

    /**
     * Update the interests cookie with a topic/production name.
     * Format: comma-separated quoted strings like "Hamilton","Wicked"
     * (from pixel-article.cfm lines 107-128)
     */
    public static function updateInterestsCookie(string $topicName): void
    {
        if ($topicName === '') {
            return;
        }

        if (isset($_COOKIE['MYINTERESTS20228'])) {
            $current = $_COOKIE['MYINTERESTS20228'];
            // Only add if not already present
            if (stripos($current, $topicName) === false) {
                $newValue = $current . ',"' . $topicName . '"';
                setcookie('MYINTERESTS20228', $newValue, time() + self::COOKIE_EXPIRY, '/', COOKIE_DOMAIN);
                $_COOKIE['MYINTERESTS20228'] = $newValue;
            }
        } else {
            $newValue = '"' . $topicName . '"';
            setcookie('MYINTERESTS20228', $newValue, time() + self::COOKIE_EXPIRY, '/', COOKIE_DOMAIN);
            $_COOKIE['MYINTERESTS20228'] = $newValue;
        }
    }

    /**
     * Set the region cookie (from sitepixel.cfm line 14).
     * Uses a very long expiry ("NEVER" in CF = persistent).
     */
    public static function setRegionCookie(int $regionId): void
    {
        // 10 years ≈ "NEVER" expiry in ColdFusion
        setcookie('REGION2023', (string)$regionId, time() + (10 * 365 * 86400), '/', COOKIE_DOMAIN);
    }
}