<?php

declare(strict_types=1);

namespace App\Services;

class ServiceFnPoolV2rayTo
{
    public function singbox($cPoolV2ray)
    {
        $i = 0;
        foreach ($cPoolV2ray as $aPoolV2ray) {
            $i++;
//            echo $i.":<br>";
            if ($i <= 0) {
//                continue;
            }
            
            if ($i >= 100) {
//                continue;
            }
            
            
            
            $aPoolSingbox = $this->singbox_row($aPoolV2ray);
            if (!$aPoolSingbox) continue; //测试用
            t($aPoolV2ray);
            t($aPoolSingbox);
            
            echo "=======================================================";
        }
        exit;
    }
    
    public function singbox_row($aPoolV2ray)
    {
        $aNode = $aPoolV2ray;
        if (isset($aPoolV2ray['protocolType'])) {
            $aPoolV2ray['protocolType'] = $this->removeUtf8Bom($aPoolV2ray['protocolType']);
        }
        
        $sProtocol = $aPoolV2ray['protocolType'] ?? '';
        
        if (isset($aPoolV2ray["config"]) && !is_array($aPoolV2ray["config"])) {
            $aPoolV2ray["config"] = rawurldecode($aPoolV2ray["config"]);
        }

        $sModTo = 'mod_to_'.$sProtocol;
        if (!method_exists($this, $sModTo)) {
            return false; // 没做对应处理的直接排除
        }
        
        $aNode = $this->$sModTo($aPoolV2ray);
        
        return $aNode;
    }
    
    private function mod_to_socks__($aV2ray)
    {
        $sConfig = $aV2ray["config"] ?? '';
        
        $aTmp = explode("@", $sConfig, 2);
        $sPwd = $aTmp[0] ?? '';
        $sConfig = $aTmp[1] ?? '';
        
        $sPwd = $this->tomBase64Decode($sPwd);
        $aTmp = explode(":", $sPwd, 2);
        $sUser = $aTmp[0] ?? '';
        $sPwd = $aTmp[1] ?? '';
        
        $aTmp = explode(":", $sConfig, 2);
        $sAddr = $aTmp[0] ?? '';
        $iPort = $aTmp[1] ?? '';

        $aNode = [
            "type"  => "socks",
            "tag"   => $aV2ray['country'] ?? '',
            "server"=> $sAddr,
            "server_port" => (int) $iPort,
            "username" => $sUser,
            "password" => $sPwd
        ];
        
        $aV2ray["config"] = $aNode;
        
        return $aV2ray;
    }
    
    private function mod_to_trojan($aV2ray)
    {
        $sConfig = $aV2ray["config"] ?? '';
        
        $aTmp = explode("@", $sConfig, 2);
        $sPwd = $aTmp[0] ?? '';
        $sConfig = $aTmp[1] ?? '';
        
        $aTmp = explode("?", $sConfig, 2);
        $sAddrFull = $aTmp[0] ?? '';
        $sConfig = $aTmp[1] ?? '';
        
        $aTmp = explode(":", $sAddrFull, 2);
        $sAddr = $aTmp[0] ?? '';
        $iPort = $aTmp[1] ?? '';

        $aNode = [
            "type"  => "trojan",
            "tag"   => $aV2ray['country'] ?? '',
            "server"=> $sAddr,
            "server_port" => (int) $iPort,
            "password" => $sPwd
        ];
        
        $aCustomYuan = explode("&", $sConfig);
        $aCustom = [];
        foreach ($aCustomYuan as $sRow) {
            $aRow = explode("=", $sRow, 2);
            $k = $aRow[0] ?? '';
            $v = $aRow[1] ?? '';
            $aCustom[$k] = $v;
        }
        
        $aTls = []; // 层1的tls
        $aUtls = []; // 层2的utls
        
        if (isset($aCustom["sni"])) { // 写层1的tls
            $aTls["server_name"] = $this->parseServerName($aCustom["sni"], $aCustom["sni"]);
        }
        if (isset($aCustom["host"])) { // 写层1的tls -- host覆盖sni=host优先
            $aTls["server_name"] = $this->parseServerName($aCustom["host"], $aCustom["host"]);
        }
        if (isset($aCustom["alpn"])) { // 写层1的tls
            $aTls["alpn"] = explode(",", $aCustom["alpn"]);
        }
        if (isset($aCustom["allowInsecure"])) { // 写层1的tls
            $aTls["insecure"] = (bool) $aCustom["allowInsecure"];
        }
        
        if (isset($aCustom["fp"])) { // 写层2的utls
            $aUtls["fingerprint"] = $aCustom["fp"];
        }
        if (!empty($aUtls)) { // 层2的utls并入tls
            $aUtls["enabled"] = true;
            $aTls["utls"] = $aUtls;
        }
        
        if (!empty($aTls)) { // 层1的tlstls并入node
            $aTls["enabled"] = true;
            $aNode["tls"] = $aTls;
        }
        
        $aTransport = [];
        if ($aCustom["type"] == "ws" && isset($aTls["server_name"])) {
            $aTransport["headers"]["Host"] = $aTls["server_name"];
        }
        
//        if (isset($aCustom["type"]) && $aCustom["type"] != "tcp" && $aCustom["type"] != "none" && $aCustom["type"] != "raw") {
//            $aTransport["type"] = $aCustom["type"];
//            if ($aCustom["type"] == "ws" && isset($aTls["server_name"])) {
//                $aTransport["headers"]["Host"] = $aTls["server_name"];
//            }
//        }
        if (isset($aCustom["path"])) {
            $aTransport["path"] = rawurldecode($aCustom["path"]);
        }
        if (!empty($aTransport)) {
            if (isset($aCustom["type"]) && $aCustom["type"] != "none" && $aCustom["type"] != "raw") {
                $aTransport["type"] = $aCustom["type"];
            }
//            if (empty($aTransport["type"])) {
//                $aTransport["type"] = "tcp";
//            }
            $aNode["transport"] = $aTransport;
        }
        
        $aV2ray["config"] = $aNode;
        
        return $aV2ray;
    }
    
    private function mod_to_hysteria2($aV2ray)
    {
        $sConfig = $aV2ray["config"] ?? '';
        
        $aTmp = explode("@", $sConfig, 2);
        $sPwd = $aTmp[0] ?? '';
        $sConfig = $aTmp[1] ?? '';
        
        $aTmp = explode("?", $sConfig, 2);
        $sAddrFull = $aTmp[0] ?? '';
        $sConfig = $aTmp[1] ?? '';
        $aTmp = explode(":", $sAddrFull, 2);
        $sAddr = $aTmp[0] ?? '';
        $iPort = $aTmp[1] ?? '';
        
        $cCustom = explode("&", $sConfig);
        $aCustom = [];
        foreach ($cCustom as $sCustom) {
            $aTmp = explode("=", $sCustom);
            $k = $aTmp[0] ?? '';
            $v = $aTmp[1] ?? '';
            $aCustom[$k] = $v;
        }
        
        $aNode = [
            "type"  => "hysteria2",
            "tag"   => $aV2ray['country'] ?? '',
            "server"=> $sAddr,
            "server_port" => (int) $iPort,
            "password" => $sPwd
        ];
        
        $aTls = [];
        if (isset($aCustom['sni'])) {
            $aTls['server_name'] = $this->parseServerName($aCustom['sni'], $aCustom['sni']);
        }
        if (isset($aCustom['insecure'])) {
            $aTls['insecure'] = (bool) $aCustom['insecure'] ?? 0;
        }
        if (!empty($aTls)) {
            $aTls['enabled'] = true;
            $aNode["tls"] = $aTls;
        }

        $aObfs = [];
        if (isset($aCustom["obfs"])) {
            $aObfs["type"] = $aCustom["obfs"];
        }
        if (isset($aCustom["obfs-password"])) {
            $aObfs["password"] = $aCustom["obfs-password"];
        }
        if (!empty($aObfs)) {
            $aNode["obfs"] = $aObfs;
        }
        
        $aV2ray["config"] = $aNode;
        
        return $aV2ray;
    }
    
    private function mod_to_ss($aV2ray)
    {
        $sConfig = $aV2ray["config"] ?? '';
        
        $aTmp = explode("@", $sConfig, 2);
        $sPwd = $aTmp[0] ?? '';
        $sConfig = $aTmp[1] ?? '';
        
        $sPwd = $this->tomBase64Decode($sPwd);
        
        $aTmp = explode(":", $sPwd, 2);
        $sPwdType = $aTmp[0] ?? '';
        $sPwd = $aTmp[1] ?? '';
        
        $aTmp = explode(":", $sConfig, 2);
        $sAddr = $aTmp[0] ?? '';
        $iPort = $aTmp[1] ?? '';
        
        // 推荐的现代化 SS 算法白名单
        $aAllowedCiphers = [
            '2022-blake3-aes-128-gcm',
            '2022-blake3-aes-256-gcm',
            '2022-blake3-chacha20-poly1305',
            'aes-128-gcm',
            'aes-192-gcm',
            'aes-256-gcm',
            'chacha20-ietf-poly1305',
            'xchacha20-ietf-poly1305',
        ];

        if (!in_array($sPwdType, $aAllowedCiphers, true)) {
            return false;
        }
        
        $aNode = [
            "type"  => "shadowsocks",
            "tag"   => $aV2ray['country'] ?? '',
            "server" => $sAddr,
            "server_port" => (int) $iPort,
            "method" => $sPwdType,
            "password" => $sPwd,
        ];
        
        $aV2ray["config"] = $aNode;
        
        return $aV2ray;
    }
    
    private function mod_to_vmess($aV2ray)
    {
        $aNode = [];
        $aConfig = $aV2ray["config"];
        
        $aNode["type"]  = "vmess";
        $aNode["tag"]   = $aV2ray['country'] ?? '';
        $aNode["server"] = $aConfig["add"] ?? '';
        $aNode["server_port"] = $aConfig["port"] ?? ''; // Cannot access offset of type string on string
        $aNode["server_port"] = (int) $aNode["server_port"];
        $aNode["uuid"] = $aConfig["id"] ?? '';
        $aNode["security"] = $aConfig["scy"] ?? 'auto';
        $aNode["alter_id"] = $aConfig["aid"] ?? 0; // 猜的
        $aNode["alter_id"] = (int) $aNode["alter_id"];
        
        $aTransport = [];
        if (isset($aConfig["net"]) && $aConfig["net"] != "none" && $aConfig["net"] != "raw") {
            $aTransport["type"] = $aConfig["net"];
        }
        if (isset($aConfig["path"])) {
            $aTransport["path"] = rawurldecode($aConfig["path"]);
        }
        if (isset($aConfig["host"])) {
            $aTransport["headers"]["Host"] = $aConfig["host"];
        }
        if (!empty($aTransport)) {
            if (empty($aTransport["type"])) {
                $aTransport["type"] = "tcp";
            }
            $aNode["transport"] = $aTransport;
        }
        
        $aTls = [];
        if (isset($aConfig["tls"])) {
            if ($aConfig["tls"] == "tls") {
                $aTls["server_name"] = !empty($aConfig['host']) ? $aConfig['host'] : $aConfig['add'];
                $aTls["server_name"] = $this->parseServerName($aTls["server_name"], $aTls["server_name"]);
            }
        }
        if (!empty($aTls)) {
            $aTls["enabled"] = true;
            $aNode["tls"] = $aTls;
        }
        
        $aV2ray["config"] = $aNode;
        
        return $aV2ray;
    }
    
    private function mod_to_vless__($aV2ray)
    {
        $sConfig = $aV2ray['config'] ?? '';
        
        $aTmp = explode("@", $sConfig, 2);
        $sPwd = $aTmp[0] ?? ''; // *
        $sConfig = $aTmp[1] ?? '';
        
        $aTmp = explode("?", $sConfig, 2);
        $sAddrFull = $aTmp[0];
        $sConfig = $aTmp[1];
        
        $aTmp = explode(":", $sAddrFull, 2);
        $sAddr = $aTmp[0] ?? ''; // *
        $sPort = $aTmp[1] ?? ''; // *
        
        $aCustomTmp = explode("&", $sConfig);
        $aCustom = [];
        foreach ($aCustomTmp as $aCustomRow) {
            $aTmp = explode("=", $aCustomRow, 2);
            $k = $aTmp[0] ?? '';
            $v = $aTmp[1] ?? '';
            $aCustom[$k] = $v; // *
        }
        
        $aNode = [
            'type' => 'vless',
            'tag' => $aV2ray['country'] ?? '',
            'server' => $sAddr,
            'server_port' => (int) $sPort,
            'uuid' => $sPwd,
        ];
        if (isset($aCustom["packetEncoding"]) && $aCustom["packetEncoding"] != "none") {
            $aNode["packet_encoding"] = $aCustom["packetEncoding"];
        }
        if (isset($aCustom["flow"])) {
            $aNode["flow"] = $aCustom["flow"];
        }
        
        
        $aTransport = [];
        if (isset($aCustom["type"]) && $aCustom["type"] != "raw") {
            $aTransport["type"] = $aCustom["type"];
        }
        if (isset($aCustom["headerType"]) && $aCustom["headerType"] == "http") {
            $aTransport["type"] = "http"; // 整个http覆盖默认tcp
        }
        if (isset($aCustom["path"])) {
            $aTransport["path"] = rawurldecode($aCustom["path"]);
        }
        if (isset($aCustom["host"])) {
            $aTransport["headers"]["Host"] = $aCustom["host"];
        }
        if (isset($aCustom["serviceName"])) {
            $aTransport["service_name"] = $aCustom["serviceName"];
        }
        if (!empty($aTransport)) {
            if (empty($aTransport["type"])) {
                $aTransport["type"] = "tcp";
            }
            $aNode["transport"] = $aTransport;
        }
        
        
        $aTls = []; // 本体
        $aUtls = []; // 二层
        $aReality = []; // 二层
        
        if (isset($aCustom["fp"])) { // 二层的utls构建
            if ($aCustom["fp"] == "random") {
                $aCustom["fp"] = "chrome";
            }
            $aUtls["fingerprint"] = $aCustom["fp"];
        }
        if (!empty($aUtls)) { // 二层的utls封装进tls
            $aUtls["enabled"] = true;
            $aTls["utls"] = $aUtls;
        }
        if (isset($aCustom["security"])) {
            $sSecurity = $aCustom["security"];
            if ($sSecurity == "reality") { // 二层的reality构建
                if (isset($aCustom["pbk"])) {
                    $aReality["public_key"] = $aCustom["pbk"];
                }
                if (isset($aCustom["sid"])) {
                    $aReality["short_id"] = (string) $aCustom["sid"];
                }
            }
        }
        if (!empty($aReality)) { // 二层的reality封建进tls
            $aReality["enabled"] = true;
            $aTls["reality"] = $aReality;
        }
        
        if (isset($aCustom["alpn"])) {
            $sTmp = $aCustom["alpn"] ?? "";
            $aTmp = explode(",", $sTmp);
            $aTls["alpn"] = $aTmp;
        }
        if (isset($aCustom["sni"])) { // 本体的tls构建
            $aTls["server_name"] = $this->parseServerName($aCustom["sni"], $aCustom["sni"]);
        }
        if (isset($aCustom["encryption"]) && $aCustom["encryption"] != "none") { // 本体的tls构建
            $aTls["encryption"] = $aCustom["encryption"];
        }
        if (!empty($aTls)) { // 本体的tls封装进node
            $aTls["enabled"] = true;
            $aNode["tls"] = $aTls;
        }
        
        $aV2ray["config"] = $aNode;
        
        return $aV2ray;
    }
    
    private function tomBase64Decode(mixed $xInput): string
    {
        // 1. 防御性类型检查
        if (!is_string($xInput) || $xInput === '') {
            return (string) $xInput;
        }

        // 2. 开启严格模式解码
        $sDecoded = base64_decode($xInput, true);

        if ($sDecoded === false) {
            return $xInput;
        }

        // 3. 反向验证：确保它不是像 humanity 这种恰好能被解码的纯普通文本
        if (base64_encode($sDecoded) !== $xInput) {
            return $xInput;
        }

        // 4. 核心：校验解码后的数据是否为合法 UTF-8 文本，且不包含不可打印控制字符（\x00-\x08, \x0B-\x0C, \x0E-\x1F）
        $bIsValidUtf8 = mb_check_encoding($sDecoded, 'UTF-8');
        $bHasControlChars = (bool) preg_match('/[\x00-\x08\x0B\x0C\x0E-\x1F]/', $sDecoded);

        if ($bIsValidUtf8 && !$bHasControlChars) {
            return $sDecoded; // 解码出来是合法的正常文本（包含中文、英文、数字等）
        }

        // 解码出来包含真正的二进制控制符（乱码），说明输入原本就是纯字符串，返回原值
        return rawurldecode($xInput);
    }
    
    public function test_allXieyi($cPoolV2ray)
    {
        $aXieyi = [];
        foreach ($cPoolV2ray as $aV2ray) {
            $sXieyi = $aV2ray["protocolType"];
            $sXieyi = $this->removeUtf8Bom($sXieyi);
            
            $iXieyi = $aXieyi[$sXieyi] ?? 0;
            $iXieyi++;
            
            $aXieyi[$sXieyi] = $iXieyi;
        }
        
        return $aXieyi;
    }
    
    private function removeUtf8Bom(string $sInput): string
    {
        if (str_starts_with($sInput, "\xEF\xBB\xBF")) {
            return substr($sInput, 3);
        }

        return $sInput;
    }
    
    private function parseServerName(string $sSni, string $sFallbackServer): string
    {
        $sSni = trim($sSni);
        $sSni = rawurldecode($sSni);
        if (empty($sSni)) {
            return $sFallbackServer;
        }

        // 针对包含 http:// 或 https:// 的情况进行解析
        if (preg_match('#^https?://#i', $sSni)) {
            $aUrl = parse_url($sSni);
            $sSni = $aUrl['host'] ?? '';
        }

        // 剔除可能残余的路径与端口号 (例如 domain.com/path 或 domain.com:8080)
        if (str_contains($sSni, '/')) {
            $sSni = explode('/', $sSni)[0];
        }
        if (str_contains($sSni, ':')) {
            $sSni = explode(':', $sSni)[0];
        }

        // 若提取后仍为空，回退到节点自身的 server 字段
        return !empty($sSni) ? $sSni : $sFallbackServer;
    }
    
}