<?php
// Environment and Configuration Loader for FlixCooks

function load_env() {
    $path = __DIR__ . '/.env';
    if (!file_exists($path)) {
        return;
    }
    
    $lines = file($path, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
    foreach ($lines as $line) {
        // Skip comments
        if (strpos(trim($line), '#') === 0) {
            continue;
        }
        
        // Parse Name=Value
        if (strpos($line, '=') !== false) {
            list($name, $value) = explode('=', $line, 2);
            $name = trim($name);
            $value = trim($value);
            
            // Remove wrapping quotes if present
            $value = trim($value, '"\'');
            
            // Populate getenv(), $_ENV, $_SERVER
            putenv("{$name}={$value}");
            $_ENV[$name] = $value;
            $_SERVER[$name] = $value;
        }
    }
}

// Automatically load on include
load_env();

class DatabaseUnavailableException extends RuntimeException
{
}

/**
 * Get a PDO connection to the database.
 */
function get_db_connection() {
    static $pdo = null;
    
    if ($pdo !== null) {
        return $pdo;
    }
    
    if (!class_exists('PDO')) {
        return null;
    }
    
    $url = getenv('DATABASE_URL');
    if (!$url) {
        return null;
    }
    
    $parsedUrl = parse_url($url);
    if ($parsedUrl === false || !isset($parsedUrl['host'], $parsedUrl['user'], $parsedUrl['pass'], $parsedUrl['path'])) {
        return null;
    }
    
    $host = $parsedUrl['host'];
    $port = $parsedUrl['port'] ?? 5432;
    $user = $parsedUrl['user'];
    $pass = $parsedUrl['pass'];
    $db = ltrim($parsedUrl['path'], '/');
    
    $dsn = "pgsql:host=$host;port=$port;dbname=$db";
    
    try {
        $pdo = new PDO($dsn, $user, $pass, [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
            PDO::ATTR_TIMEOUT => 3,
        ]);
        return $pdo;
    } catch (\Exception $e) {
        error_log("Database connection failed: " . $e->getMessage());
        return null;
    }
}