<?php

namespace App\Http\Controllers;

use App\Models\EmailFilter;
use App\Models\Node;
use App\Models\NodeDailyDataFlow;
use App\Models\NodeHourlyDataFlow;
use App\Models\User;
use App\Models\UserDailyDataFlow;
use App\Models\UserDataFlowLog;
use App\Models\UserHourlyDataFlow;
use DB;
use Exception;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Http\UploadedFile;
use Illuminate\Routing\Controller as BaseController;
use RuntimeException;
use Str;

class Controller extends BaseController {
	use AuthorizesRequests, DispatchesJobs, ValidatesRequests;

	// 生成随机密码
	public function makePasswd() {
		return makeRandStr();
	}

	// 生成UUID
	public function makeUUID() {
		return Str::uuid();
	}

	// 生成网站安全码
	public function makeSecurityCode(): string {
		return strtolower(makeRandStr(8));
	}

	// 类似Linux中的tail命令
	public function tail($file, $n, $base = 5) {
		$fileLines = $this->countLine($file);
		if($fileLines < 15000){
			return false;
		}

		$fp = fopen($file, 'rb+');
		assert($n > 0);
		$pos = $n + 1;
		$lines = [];
		while(count($lines) <= $n){
			try{
				fseek($fp, -$pos, SEEK_END);
			}catch(Exception $e){
				break;
			}

			$pos *= $base;
			while(!feof($fp)){
				array_unshift($lines, fgets($fp));
			}
		}

		return array_slice($lines, 0, $n);
	}

	/**
	 * 计算文件行数
	 *
	 * @param $file
	 *
	 * @return int
	 */
	public function countLine($file): int {
		$fp = fopen($file, 'rb');
		$i = 0;
		while(!feof($fp)){
			//每次读取2M
			if($data = fread($fp, 1024 * 1024 * 2)){
				//计算读取到的行数
				$num = substr_count($data, "\n");
				$i += $num;
			}
		}

		fclose($fp);

		return $i;
	}

	// 获取邮箱后缀
	public function emailFilterList($type): array {
		return EmailFilter::query()->whereType($type)->pluck('words')->toArray();
	}

	// 将Base64图片转换为本地图片并保存
	public function base64ImageSaver($base64_image_content): ?string {
		// 匹配出图片的格式
		if(preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $result)){
			$type = $result[2];

			$directory = date('Ymd');
			$path = '/assets/images/qrcode/'.$directory.'/';
			// 检查是否有该文件夹，如果没有就创建，并给予最高权限
			if(!file_exists(public_path($path))
			   && !mkdir($concurrentDirectory = public_path($path), 0755, true)
			   && !is_dir($concurrentDirectory)){
				throw new RuntimeException(sprintf('Directory "%s" was not created', $concurrentDirectory));
			}

			$fileName = makeRandStr(18, true).".{$type}";
			if(file_put_contents(public_path($path.$fileName),
				base64_decode(str_replace($result[1], '', $base64_image_content)))){
				chmod(public_path($path.$fileName), 0744);

				return $path.$fileName;
			}
		}

		return '';
	}

	// 上传文件处理
	public function uploadFile(UploadedFile $file): string {
		$fileType = $file->getClientOriginalExtension();

		// 验证文件合法性
		if(!in_array($fileType, ['jpg', 'png', 'jpeg', 'bmp'])){
			return false;
		}

		$name = date('YmdHis').random_int(1000, 2000).'.'.$fileType;
		$move = $file->move(base_path().'/public/upload/image/', $name);

		return $move? '/upload/image/'.$name : '';
	}

	/**
	 * 节点信息
	 *
	 * @param  int  $uid       用户ID
	 * @param  int  $nodeId    节点ID
	 * @param  int  $infoType  信息类型：0为链接，1为文字
	 *
	 * @return string
	 */
	public function getUserNodeInfo($uid, $nodeId, $infoType): string {
		$user = User::whereId($uid)->firstOrFail();
		$node = Node::whereId($nodeId)->firstOrFail();
		$scheme = null;
		// 获取分组名称
		$group = $node->level_name;
		$host = $node->server?: $node->ip;
		$data = null;
		switch($node->type){
			case 2:
				// 生成v2ray scheme
				if($infoType !== 1){
					// 生成v2ray scheme
					$data = $this->v2raySubUrl($node->name, $host, $node->v2_port, $user->vmess_id, $node->v2_alter_id,
						$node->v2_net, $node->v2_type, $node->v2_host, $node->v2_path, $node->v2_tls? "tls" : "");
				}else{
					$data = "服务器：".$host.PHP_EOL."IPv6：".($node->ipv6?: "").PHP_EOL."端口：".$node->v2_port.PHP_EOL."加密方式：".$node->v2_method.PHP_EOL."用户ID：".$user->vmess_id.PHP_EOL."额外ID：".$node->v2_alter_id.PHP_EOL."传输协议：".$node->v2_net.PHP_EOL."伪装类型：".$node->v2_type.PHP_EOL."伪装域名：".($node->v2_host?: "").PHP_EOL."路径：".($node->v2_path?: "").PHP_EOL."TLS：".($node->v2_tls? "tls" : "").PHP_EOL;
				}
				break;
			case 3:
				if($infoType !== 1){
					$data = $this->trojanSubUrl($user->passwd, $host, $node->port, $node->name);
				}else{
					$data = "备注：".$node->name.PHP_EOL."服务器：".$host.PHP_EOL."密码：".$user->passwd.PHP_EOL."端口：".$node->port.PHP_EOL;
				}
				break;
			case 1:
			case 4:
				$protocol = $node->protocol;
				$method = $node->method;
				$obfs = $node->obfs;
				if($node->single){
					$port = $node->port;
					$passwd = $node->passwd;
					$protocol_param = $user->port.':'.$user->passwd;
				}else{
					$port = $user->port;
					$passwd = $user->passwd;
					$protocol_param = $node->protocol_param;
					if($node->type === 1){
						$protocol = $user->protocol;
						$method = $user->method;
						$obfs = $user->obfs;
					}
				}

				if($infoType !== 1){
					// 生成ss/ssr scheme
					$data = $node->compatible? $this->ssSubUrl($host, $port, $method, $passwd,
						$group) : $this->ssrSubUrl($host, $port, $protocol, $method, $obfs, $passwd, $node->obfs_param,
						$protocol_param, $node->name, $group, $node->is_udp);
				}else{
					// 生成文本配置信息
					$data = "服务器：".$host.PHP_EOL."IPv6：".$node->ipv6.PHP_EOL."服务器端口：".$port.PHP_EOL."密码：".$passwd.PHP_EOL."加密：".$method.PHP_EOL.($node->compatible? '' : "协议：".$protocol.PHP_EOL."协议参数：".$protocol_param.PHP_EOL."混淆：".$obfs.PHP_EOL."混淆参数：".$node->obfs_param.PHP_EOL);
				}
				break;
			default:
		}

		return $data;
	}

	public function v2raySubUrl($name, $host, $port, $uuid, $alter_id, $net, $type, $domain, $path, $tls): string {
		return 'vmess://'.base64url_encode(json_encode([
				"v"    => "2",
				"ps"   => $name,
				"add"  => $host,
				"port" => $port,
				"id"   => $uuid,
				"aid"  => $alter_id,
				"net"  => $net,
				"type" => $type,
				"host" => $domain,
				"path" => $path,
				"tls"  => $tls? "tls" : ""
			], JSON_PRETTY_PRINT));
	}

	public function trojanSubUrl($password, $domain, $port, $remark): string {
		return 'trojan://'.urlencode($password).'@'.$domain.':'.$port.'#'.urlencode($remark);
	}

	public function ssSubUrl($host, $port, $method, $passwd, $group): string {
		return 'ss://'.base64url_encode($method.':'.$passwd.'@'.$host.':'.$port).'#'.$group;
	}

	public function ssrSubUrl(
		$host, $port, $protocol, $method, $obfs, $passwd, $obfs_param, $protocol_param, $name, $group, $is_udp
	): string {
		return 'ssr://'.base64url_encode($host.':'.$port.':'.$protocol.':'.$method.':'.$obfs.':'.base64url_encode($passwd).'/?obfsparam='.base64url_encode($obfs_param).'&protoparam='.base64url_encode($protocol_param).'&remarks='.base64url_encode($name).'&group='.base64url_encode($group).'&udpport='.$is_udp.'&uot=0');
	}

	// 流量使用图表
	public function dataFlowChart($id, $is_node = 0): array {
		if($is_node){
			$currentFlow = UserDataFlowLog::query()->whereNodeId($id);
			$hourlyFlow = NodeHourlyDataFlow::query()->whereNodeId($id);
			$dailyFlow = NodeDailyDataFlow::query()->whereNodeId($id);
		}else{
			$currentFlow = UserDataFlowLog::query()->whereUserId($id);
			$hourlyFlow = UserHourlyDataFlow::query()->userHourly($id);
			$dailyFlow = UserDailyDataFlow::query()->userDaily($id);
		}
		$currentFlow = $currentFlow->where('log_time', '>=', strtotime(date('Y-m-d H:00')))->sum(DB::raw('u + d'));
		$hourlyFlow = $hourlyFlow->whereDate('created_at', date('Y-m-d'))->pluck('total', 'created_at')->toArray();
		$dailyFlow = $dailyFlow->whereMonth('created_at', date('n'))->pluck('total', 'created_at')->toArray();

		// 节点一天内的流量
		$hourlyData = array_fill(0, date('G') + 1, 0);
		foreach($hourlyFlow as $date => $dataFlow){
			$hourlyData[date('G', strtotime($date))] = round($dataFlow / GB, 3);
		}
		$hourlyData[date('G') + 1] = round($currentFlow / GB, 3);

		// 节点一个月内的流量
		$dailyData = array_fill(0, date('j'), 0);
		foreach($dailyFlow as $date => $dataFlow){
			$dailyData[date('j', strtotime($date)) - 1] = round($dataFlow / GB, 3);
		}
		$dailyData[date('j', strtotime(now())) - 1] = round((array_sum($hourlyFlow) + $currentFlow) / GB, 3);

		return [
			'trafficDaily'  => json_encode($dailyData),
			'trafficHourly' => json_encode($hourlyData),
			'monthDays'     => json_encode(range(1, date("j"), 1)),// 本月天数
			'dayHours'      => json_encode(range(0, date("G"), 1))// 本日小时
		];
	}
}