<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2021 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace app\log\driver;

use think\App;
use think\contract\LogHandlerInterface;
use think\facade\Config;

/**
 * 本地化调试输出到文件
 */
class Monolog implements LogHandlerInterface
{
    /**
     * 配置参数
     * @var array
     */
    protected $config = [
        'time_format'  => 'c',
        'json_options' => JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES,

    ];


    /**
     * 日志写入接口
     * @access public
     * @param array $log 日志信息
     * @return bool
     */
    public function save(array $log): bool
    {
        $info = [];
        // 日志信息封装
        $time = \DateTime::createFromFormat('0.u00 U', microtime())->setTimezone(new \DateTimeZone(date_default_timezone_get()))->format($this->config['time_format']);
        foreach ($log as $type => $val) {
            $message = [];
            foreach ($val as $msg) {

                $message[] = json_encode(['time' => $time, 'type' => $type, 'msg' => $msg], $this->config['json_options']) ;
            }
            $info[$type] = $message;
        }
        if ($info) {
            return $this->write($info);
        }

        return true;
    }
    /**
     * 日志写入
     * @access protected
     * @param array  $message     日志信息
     * @param string $destination 日志文件
     * @return bool
     */
    protected function write(array $message): bool
    {
        $tcp_log_url = env('TCP_LOG_URL');
        $tcp_log_port = (int) env('TCP_LOG_PORT');
        $project = env('PROJECT_NAME');

        // 快速失败：配置缺失
        if (!$tcp_log_url || !$tcp_log_port || !$project) {
            return true; // 或 error_log("Log config missing");
        }

        // 1. 安全序列化并限制大小（例如最大 64KB）
        $maxSize = 64 * 1024; // 64KB
        $json = json_encode([
            'message' => $message,
            'project' => $project
        ], $this->config['json_options'] ?? 0);

        if ($json === false) {
            error_log("Failed to encode log message: " . json_last_error_msg());
            return true;
        }

        // 截断过大的日志（保留结构完整性）
        if (strlen($json) > $maxSize) {
            // 尝试只截断 message 内容（更智能）
            $fallbackMessage = [
                'message' => '[TRUNCATED] Log too large (' . strlen($json) . ' bytes)',
                'project' => $project,
                'original_size_bytes' => strlen($json)
            ];
            $json = json_encode($fallbackMessage, $this->config['json_options'] ?? 0);
        }

        // 2. 添加换行符（Logstash tcp + json_lines 必需）
        $payload = $json . "\n";

        // 3. 建立连接（适当延长超时）
        $socket = @fsockopen($tcp_log_url, $tcp_log_port, $errno, $errstr, 2); // 2秒超时

        if (!$socket) {
            error_log("Log socket connect failed to {$tcp_log_url}:{$tcp_log_port} - {$errstr} ({$errno})");
            return true; // 不影响主流程
        }

        // 4. 发送数据（抑制 fwrite 警告，但可选记录）
        $bytesWritten = @fwrite($socket, $payload);
        $expected = strlen($payload);

        if ($bytesWritten === false || $bytesWritten !== $expected) {
            error_log("Partial or failed log send to {$tcp_log_url}:{$tcp_log_port} (sent {$bytesWritten}/{$expected} bytes)");
        }

        // 5. 确保关闭 socket
        fclose($socket);

        return true;
    }
}