<?php
/**
 * Helper to run a PHP script in the background.
 * Works on both Windows (Laragon) and Linux servers.
 * 
 * Usage: include 'run_background.php';
 *        runBackground(__DIR__ . '/auto_delete.php', [$chatId, $msgId, $token, 'pin', $text]);
 */
function runBackground($scriptPath, $args = []) {
    // Find the real PHP CLI binary
    $phpBin = findPhpCli();
    
    // Build the argument string
    $argStr = '';
    foreach ($args as $arg) {
        $argStr .= ' ' . escapeshellarg((string)$arg);
    }
    
    $isWindows = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN');
    
    if ($isWindows) {
        // Windows: use start /B to run in background
        $cmd = 'start /B "" "' . $phpBin . '" "' . $scriptPath . '"' . $argStr . ' > NUL 2>&1';
        pclose(popen($cmd, 'r'));
    } else {
        // Linux/Mac: use & to run in background
        $cmd = '"' . $phpBin . '" "' . $scriptPath . '"' . $argStr . ' > /dev/null 2>&1 &';
        exec($cmd);
    }
}

function findPhpCli() {
    // Method 1: Use PHP_BINDIR (always points to PHP's bin directory)
    $isWindows = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN');
    $ext = $isWindows ? '.exe' : '';
    
    $phpExe = PHP_BINDIR . DIRECTORY_SEPARATOR . 'php' . $ext;
    if (file_exists($phpExe)) {
        return $phpExe;
    }
    
    // Method 2: Use php.ini directory (same folder as php.exe in Laragon)
    $iniPath = php_ini_loaded_file();
    if ($iniPath) {
        $phpExe = dirname($iniPath) . DIRECTORY_SEPARATOR . 'php' . $ext;
        if (file_exists($phpExe)) {
            return $phpExe;
        }
    }
    
    // Method 3: PHP_BINARY (works for CLI, might be httpd.exe for mod_php)
    $bin = PHP_BINARY;
    if (stripos(basename($bin), 'php') === 0) {
        return $bin;
    }
    
    // Method 4: Fallback to 'php' in PATH
    return 'php';
}