<?php
// 兼容性数据库连接，实际由 core/db/Db.php 通过 config.php 驱动
// 从 .env 文件读取配置
$envFile = __DIR__ . '/../.env';
$dbHost = 'localhost';
$dbUser = 'root';
$dbPass = '';
$dbName = 'mes2';

if (file_exists($envFile)) {
    $lines = file($envFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
    foreach ($lines as $line) {
        $line = trim($line);
        if ($line === '' || $line[0] === '#') continue;
        if (strpos($line, '=') !== false) {
            list($key, $value) = explode('=', $line, 2);
            $key = trim($key);
            $value = trim($value);
            // 去除引号包裹
            if ((str_starts_with($value, '"') && str_ends_with($value, '"')) ||
                (str_starts_with($value, "'") && str_ends_with($value, "'"))) {
                $value = substr($value, 1, -1);
            }
            switch ($key) {
                case 'DB_HOST': $dbHost = $value; break;
                case 'DB_USER': $dbUser = $value; break;
                case 'DB_PASS': $dbPass = $value; break;
                case 'DB_NAME': $dbName = $value; break;
            }
        }
    }
}

$conn = new mysqli($dbHost, $dbUser, $dbPass, $dbName);
if ($conn->connect_error) {
    error_log('数据库连接失败：' . $conn->connect_error);
    die('数据库连接失败，请联系管理员');
}
$conn->set_charset("utf8mb4");