<?php

namespace base\admin\controller\system;

use app\admin\service\annotation\ControllerAnnotation;
use app\admin\service\annotation\NodeAnotation;
use app\common\command\admin\Version;
use app\common\controller\AdminController;
use think\facade\Cache;
use think\facade\Config;
use think\facade\Db;

/**
 * @ControllerAnnotation(title="system_status")
 */
class StatusBase extends AdminController
{
    /**
     * @NodeAnotation(title="列表")
     */
    public function index()
    {
        $systemInfo = $this->getSystemInfo();
        $serverInfo = $this->getServerInfo();
        $databaseInfo = $this->getDatabaseInfo();
        $cacheInfo = $this->getCacheInfo();
        $storageInfo = $this->getStorageInfo();
        $phpConfigInfo = $this->getPhpConfigInfo();
        $performanceInfo = $this->getPerformanceInfo();

        $this->assign('systemInfo', $systemInfo);
        $this->assign('serverInfo', $serverInfo);
        $this->assign('databaseInfo', $databaseInfo);
        $this->assign('cacheInfo', $cacheInfo);
        $this->assign('storageInfo', $storageInfo);
        $this->assign('phpConfigInfo', $phpConfigInfo);
        $this->assign('performanceInfo', $performanceInfo);

        return $this->fetch();
    }

    protected function getSystemInfo()
    {
        return [
            'framework' => 'Ulthon Admin',
            'version' => Version::VERSION,
            'product_version' => Version::PRODUCT_VERSION ?: Version::VERSION,
            'layui_version' => Version::LAYUI_VERSION,
            'thinkphp_version' => app()->version(),
            'php_version' => PHP_VERSION,
            'server_time' => date('Y-m-d H:i:s'),
            'timezone' => date_default_timezone_get(),
        ];
    }

    protected function getServerInfo()
    {
        $serverSoftware = $_SERVER['SERVER_SOFTWARE'] ?? 'Unknown';
        $os = PHP_OS;
        $sapi = php_sapi_name();
        $ip = $_SERVER['SERVER_ADDR'] ?? '127.0.0.1';
        $port = $_SERVER['SERVER_PORT'] ?? '80';

        return [
            'server_software' => $serverSoftware,
            'os' => $os,
            'sapi' => $sapi,
            'ip' => $ip,
            'port' => $port,
        ];
    }

    protected function getDatabaseInfo()
    {
        $connectionName = Config::get('database.default', 'mysql');
        $dbConfig = Config::get('database.connections.' . $connectionName);
        $info = [
            'type' => $dbConfig['type'] ?? 'Unknown',
            'hostname' => $dbConfig['hostname'] ?? 'Unknown',
            'database' => $dbConfig['database'] ?? 'Unknown',
            'prefix' => $dbConfig['prefix'] ?? '',
            'charset' => $dbConfig['charset'] ?? 'Unknown',
            'status' => 'unknown',
            'version' => 'Unknown',
            'table_count' => 0,
        ];

        try {
            $connection = Db::connect($connectionName);
            $version = $connection->query('SELECT VERSION() as version')[0]['version'] ?? 'Unknown';
            
            $prefix = $dbConfig['prefix'] ?? '';
            $tableCount = 0;
            if ($prefix) {
                $tables = $connection->query("SHOW TABLES LIKE '{$prefix}%'");
                $tableCount = count($tables);
            } else {
                $tables = $connection->query('SHOW TABLES');
                $tableCount = count($tables);
            }

            $info['status'] = 'connected';
            $info['version'] = $version;
            $info['table_count'] = $tableCount;
        } catch (\Exception $e) {
            $info['status'] = 'error';
            $info['error'] = $e->getMessage();
        }

        return $info;
    }

    protected function getCacheInfo()
    {
        $defaultDriver = Config::get('cache.default');
        $cacheConfig = Config::get('cache.stores.' . $defaultDriver);
        
        $info = [
            'default_driver' => $defaultDriver,
            'type' => $cacheConfig['type'] ?? 'Unknown',
            'path' => $cacheConfig['path'] ?? '',
            'prefix' => $cacheConfig['prefix'] ?? '',
            'expire' => $cacheConfig['expire'] ?? 0,
            'status' => 'unknown',
        ];

        try {
            $testKey = 'system_status_test_' . time();
            Cache::set($testKey, 'test', 10);
            $testValue = Cache::get($testKey);
            Cache::delete($testKey);

            if ($testValue === 'test') {
                $info['status'] = 'available';
            } else {
                $info['status'] = 'error';
            }
        } catch (\Exception $e) {
            $info['status'] = 'error';
            $info['error'] = $e->getMessage();
        }

        return $info;
    }

    protected function getStorageInfo()
    {
        $rootPath = app()->getRootPath();
        $freeBytes = disk_free_space($rootPath);
        $totalBytes = disk_total_space($rootPath);
        $usedBytes = $totalBytes - $freeBytes;
        $usagePercent = ($usedBytes / $totalBytes) * 100;

        return [
            'root_path' => $rootPath,
            'total' => $this->formatBytes($totalBytes),
            'free' => $this->formatBytes($freeBytes),
            'used' => $this->formatBytes($usedBytes),
            'usage_percent' => round($usagePercent, 2),
        ];
    }

    protected function getPhpConfigInfo()
    {
        return [
            'upload_max_filesize' => ini_get('upload_max_filesize'),
            'post_max_size' => ini_get('post_max_size'),
            'memory_limit' => ini_get('memory_limit'),
            'max_execution_time' => ini_get('max_execution_time') . 's',
            'max_input_time' => ini_get('max_input_time') . 's',
            'safe_mode' => ini_get('safe_mode') ? 'On' : 'Off',
            'allow_url_fopen' => ini_get('allow_url_fopen') ? 'On' : 'Off',
            'file_uploads' => ini_get('file_uploads') ? 'On' : 'Off',
            'disabled_functions' => ini_get('disable_functions') ?: 'None',
        ];
    }

    protected function getPerformanceInfo()
    {
        $memoryUsage = memory_get_usage(true);
        $memoryLimit = $this->convertToBytes(ini_get('memory_limit'));
        $memoryPercent = $memoryLimit > 0 ? ($memoryUsage / $memoryLimit) * 100 : 0;

        return [
            'memory_usage' => $this->formatBytes($memoryUsage),
            'memory_limit' => $this->formatBytes($memoryLimit),
            'memory_percent' => round($memoryPercent, 2),
            'peak_memory' => $this->formatBytes(memory_get_peak_usage(true)),
            'load_average' => function_exists('sys_getloadavg') ? implode(', ', sys_getloadavg()) : 'N/A',
        ];
    }

    protected function formatBytes($bytes, $precision = 2)
    {
        $units = ['B', 'KB', 'MB', 'GB', 'TB'];
        
        for ($i = 0; $bytes > 1024 && $i < count($units) - 1; $i++) {
            $bytes /= 1024;
        }

        return round($bytes, $precision) . ' ' . $units[$i];
    }

    protected function convertToBytes($value)
    {
        $value = trim($value);
        $unit = strtolower($value[strlen($value) - 1]);
        $value = (float) $value;

        switch ($unit) {
            case 'g':
                $value *= 1024;
            case 'm':
                $value *= 1024;
            case 'k':
                $value *= 1024;
        }

        return $value;
    }
}