package curlServer

import (
	curl2 "cfTest/curlServer/pb"
	"context"
	"github.com/sirupsen/logrus"
	"gopkg.in/natefinch/lumberjack.v2"
	"net"
	"net/http"
	"runtime"
	"strings"
	"time"
)

var logger *logrus.Logger

type CurlServer struct {
	curl2.UnimplementedCurlWithResolveServer
}

func (s *CurlServer) CurlWithResolveParam(ctx context.Context, requestCurlObject *curl2.CurlRequest) (*curl2.CurlReply, error) {
	logger.Println("url Received: ", requestCurlObject.GetUrl())
	logger.Println("ip Received: ", requestCurlObject.GetIp())
	logger.Println("ua Received: ", requestCurlObject.GetUa())
	logger.Println("UseHeadMethod Received: ", requestCurlObject.GetUseHeadMethod())

	// ua
	var ua = ""
	if len(requestCurlObject.GetUa()) == 0 {
		ua = generateDefaultUserAgent()
	} else {
		ua = requestCurlObject.GetUa()
	}

	// Server
	// 创建一个自定义的 Transport
	transport := &CustomTransport{
		Transport: &http.Transport{
			DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
				dialer := &net.Dialer{
					Timeout:   30 * time.Second,
					KeepAlive: 30 * time.Second,
					DualStack: true,
				}

				// 修改addr -> 指向IP地址
				addr = requestCurlObject.GetIp() + ":443"
				logger.Println("addr = ", addr)
				conn, err := dialer.DialContext(ctx, network, addr)
				if err != nil {
					logger.Error("TCP连接异常: " + err.Error())
					return nil, err
				}
				return conn, nil
			},
		},
		// 指定UA
		UserAgent:     ua,
		UseHeadMethod: requestCurlObject.GetUseHeadMethod(),
	}

	// 创建一个使用自定义 Transport 的 HTTP 客户端
	client := &http.Client{
		Transport: transport,
	}

	// 创建一个GET请求, 将转义字符重新转换
	originalUrl := strings.Replace(requestCurlObject.GetUrl(), "%5B", "[", -1)
	originalUrl = strings.Replace(originalUrl, "%5D", "]", -1)
	originalUrl = strings.Replace(originalUrl, "%20", " ", -1)
	originalUrl = strings.Replace(originalUrl, "%7B", "{", -1)
	originalUrl = strings.Replace(originalUrl, "%7D", "}", -1)
	originalUrl = strings.Replace(originalUrl, "%22", "\"", -1)
	originalUrl = strings.Replace(originalUrl, "%26", "&", -1)
	logger.Println(originalUrl)

	// 发起 HTTP 请求
	resp, err := client.Get(originalUrl)
	if err != nil {
		logger.Error("发送HTTP请求出错, e:" + err.Error() + ", url: " + requestCurlObject.GetUrl())
		return nil, err
	}
	defer resp.Body.Close()

	// 解析响应结果
	logger.Println("Code = ", resp.StatusCode)
	logger.Println("header = ", resp.Header)

	return &curl2.CurlReply{
		Code:          int32(resp.StatusCode),
		ContentLength: resp.ContentLength,
	}, nil
}

type CustomTransport struct {
	Transport     http.RoundTripper
	UserAgent     string
	UseHeadMethod bool
}

func (t *CustomTransport) RoundTrip(req *http.Request) (*http.Response, error) {
	req.Header.Set("User-Agent", t.UserAgent)
	if t.UseHeadMethod {
		req.Method = http.MethodHead
	}
	return t.Transport.RoundTrip(req)
}

func generateDefaultUserAgent() string {
	// 获取操作系统名称和版本号
	osInfo := runtime.GOOS
	// 获取编程语言和版本号
	langInfo := "Go/" + runtime.Version()
	// 获取应用程序运行时的信息
	appInfo := "Executor/1.0"

	return appInfo + " (" + osInfo + "; " + langInfo + ")"
}

func InitLogger() {
	setupLogger()
	// 在初始化函数中对包级别的变量进行初始化
	logger = logrus.StandardLogger()
	logger.Println("启动CurlServer, 初始化日志框架...")
}

func setupLogger() {
	// 创建一个新的logrus实例
	log := logrus.New()

	// 设置日志输出为文件，并使用lumberjack库来实现每天生成一个新的日志文件，并保存旧日志文件
	log.SetOutput(&lumberjack.Logger{
		Filename:   "../../logs/curlServer/" + generateLogFileName(), // 日志文件路径，使用日期占位符%Y-%m-%d
		MaxSize:    20,                                               // 每个日志文件的最大尺寸，单位：MB
		MaxBackups: 3,                                                // 最多保留的旧日志文件数
		MaxAge:     30,                                               // 最多保留的旧日志文件天数（这里设置为30天）
		LocalTime:  true,                                             // 使用本地时间（默认为UTC时间）
		Compress:   true,                                             // 是否压缩旧日志文件
	})

	// 设置日志格式为JSON格式
	log.SetFormatter(&logrus.JSONFormatter{})

	// 设置日志级别为Debug
	log.SetLevel(logrus.DebugLevel)

	// 将logrus实例设置为全局的默认日志记录器
	logrus.StandardLogger().SetOutput(log.Out)
}

func generateLogFileName() string {
	currentDate := time.Now().Format("01-02-2006")
	return "curl_" + currentDate + ".log"
}

func GetLogger() *logrus.Logger {
	return logger
}