<?php
// api/config/database.php

mysqli_report(MYSQLI_REPORT_OFF);

/**
 * Parse and load a .env file into the environment.
 * Supports KEY=VALUE format, ignores comments (#) and empty lines.
 */
if (!function_exists('loadEnvFile')) {
    function loadEnvFile(string $filePath): void {
        if (!is_file($filePath)) {
            return;
        }

        $lines = file($filePath, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
        foreach ($lines as $line) {
            $line = trim($line);

            // Skip comments and empty lines
            if ($line === '' || str_starts_with($line, '#')) {
                continue;
            }

            // Split on first '=' only
            $eqPos = strpos($line, '=');
            if ($eqPos === false) {
                continue;
            }

            $key   = trim(substr($line, 0, $eqPos));
            $value = trim(substr($line, $eqPos + 1));

            // Strip surrounding quotes if present
            if (
                strlen($value) >= 2 &&
                (($value[0] === '"' && $value[-1] === '"') ||
                 ($value[0] === "'" && $value[-1] === "'"))
            ) {
                $value = substr($value, 1, -1);
            }

            // Only set if not already defined by the server/environment
            if ($key !== '' && getenv($key) === false) {
                putenv("$key=$value");
                $_ENV[$key]    = $value;
                $_SERVER[$key] = $value;
            }
        }
    }
}

// Load .env from project root (two levels up from this file)
loadEnvFile(dirname(__DIR__, 2) . '/.env');

if (!function_exists('loadDatabaseConfig')) {
    function loadDatabaseConfig(): array {
        $config = [
            'host'    => getenv('DB_HOST')    ?: 'localhost',
            'user'    => getenv('DB_USER')    ?: 'root',
            'pass'    => getenv('DB_PASS')    ?: '',
            'name'    => getenv('DB_NAME')    ?: 'webgis_class',
            'port'    => (int)(getenv('DB_PORT') ?: 3306),
            'charset' => getenv('DB_CHARSET') ?: 'utf8mb4',
        ];

        // Allow local override file for development (not committed to git)
        $localConfigFile = __DIR__ . '/database.local.php';
        if (is_file($localConfigFile)) {
            $localConfig = require $localConfigFile;
            if (is_array($localConfig)) {
                $config = array_merge($config, array_intersect_key($localConfig, $config));
            }
        }

        return $config;
    }
}

$dbConfig = loadDatabaseConfig();

define('DB_HOST',    $dbConfig['host']);
define('DB_USER',    $dbConfig['user']);
define('DB_PASS',    $dbConfig['pass']);
define('DB_NAME',    $dbConfig['name']);
define('DB_PORT',    $dbConfig['port']);
define('DB_CHARSET', $dbConfig['charset']);

function getDB(): mysqli {
    static $conn = null;
    if ($conn === null) {
        $conn = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME, DB_PORT);
        if ($conn->connect_error) {
            error_log('DB connection failed: ' . $conn->connect_error);
            http_response_code(500);
            echo json_encode([
                'status'  => 'error',
                'message' => 'Koneksi database gagal'
            ]);
            exit;
        }
        $conn->set_charset(DB_CHARSET);
    }
    return $conn;
}