<?php

function installpostgre()
{
    // Generate a secure random password (20 chars, URL-safe)
    if (function_exists('random_bytes')) {
        $bytes = random_bytes(16);
    } else {
        $bytes = openssl_random_pseudo_bytes(16);
    }
    $password = substr(str_replace(['/', '+', '='], '', base64_encode($bytes)), 0, 20);

    echo 'sudo apt update' . "\n";
    echo 'sudo apt install postgresql postgresql-contrib -y' . "\n";
    #$pgVersion = exec('pg_config --version | awk \'{print $NF}\' | cut -d\'.\' -f1-2');
    #echo 'sudo cp /etc/postgresql/' . $pgVersion . '/main/pg_hba.conf /etc/postgresql/' . $pgVersion . '/main/pg_hba.conf.bak' . "\n";
    #echo 'sudo sh -c "echo \'host    all             all             127.0.0.1/32            md5\' > /etc/postgresql/' . $pgVersion . '/main/pg_hba.conf"' . "\n";
    echo 'sudo systemctl restart postgresql' . "\n";
    echo 'sudo -u postgres psql -c "CREATE DATABASE dragoncore;"' . "\n";
    echo 'sudo -u postgres psql -c "CREATE USER dragoncore2 WITH PASSWORD \'' . $password . '\';"' . "\n";
    echo 'sudo -u postgres psql -c "GRANT ALL PRIVILEGES ON DATABASE dragoncore TO dragoncore;"' . "\n";
    echo 'sudo -u postgres psql -c "GRANT USAGE, CREATE ON SCHEMA public TO dragoncore;"' . "\n";
    echo 'sudo systemctl restart postgresql' . "\n";

    // Ensure /opt/DragonCore exists
    $dir = '/opt/DragonCore';
    if (!is_dir($dir)) {
        if (!mkdir($dir, 0755, true) && !is_dir($dir)) {
            fwrite(STDERR, "Failed to create directory: $dir\n");
            return;
        }
    }

    // Create config.php with variables (no return)
    $config = <<<PHP
<?php
\$db_host = '127.0.0.1';
\$db_port = '5432';
\$db_name = 'dragoncore';
\$db_user = 'dragoncore2';
\$db_pass = '{$password}';
PHP;

    $configPath = $dir . '/config.php';
    if (file_put_contents($configPath, $config) === false) {
        fwrite(STDERR, "Failed to write config file at {$configPath}\n");
    } else {
        echo "Config file created at {$configPath}\n";
    }
}

if ($argc < 2) {
    die("Use o MENU!\n");
}

$functionName = $argv[1];

if (function_exists($functionName)) {
    array_shift($argv);
    echo call_user_func_array($functionName, array_slice($argv, 1));
} else {
    echo "Function $functionName does not exist.\n";
}

?>