package main

import (
	"bufio"
	"fmt"
	"github.com/TransX/log"
	"github.com/TransX/protocol"
	"io"
	"net"
	"os"
	"testing"
	"time"
)

func serverBin(t *testing.T) {
	file, _ := os.Open("test/hex.bin")
	reader := bufio.NewReader(file)
	listener, err := net.Listen("tcp4", "127.0.0.1:1244")
	if err != nil {
		t.Fatal(err)
	}
	var nCount byte
	nCount = 0
	for {
		conn, err := listener.Accept()
		log.Info("Test Server Incoming %s", conn.RemoteAddr().String())
		if err != nil {
			log.Error(err.Error())
		}

		bytes := make([]byte, 1024*32)
		/////<- 当发送端的cache大于4097时，把这些注释掉
		_bytes := make([]byte, 1024*32)
		add := 0
		n := 0
		for {
			/////->
			n, err = io.ReadAtLeast(conn, _bytes, 4097)
			if err != nil {
				log.Error("Test Server read err %s", err.Error())
				break
			}
			log.Info("Test Server read per time %d", n)
			////<-
			copy(bytes[add:add+n], _bytes[:n])
			add += n
			log.Info("add %d from %s", add, conn.RemoteAddr().String())
			if add == 4097 {
				n = 4097
				break
			}
		}
		////->
		log.Info("Test Server read %d bytes from %s", n, conn.RemoteAddr().String())
		if bytes[0] != nCount {
			log.Error("package sequence not right. it's %d. should be %d", bytes[0], nCount)
		}

		log.Info("Test Server receive with count %d", nCount)
		nCount++
		if n == 0 {
			log.Error("read n=0")
			os.Exit(-2)
		}
		binBytes := make([]byte, n-1)
		pos, _ := file.Seek(0, 1)
		log.Info("Test Server file pos %d", pos)
		nBinByte, err := reader.Read(binBytes)
		if err != nil {
			log.Error("Test Server read bin %s", err.Error())
			break
		}
		for {
			if nBinByte != n-1 {
				log.Info("Test Server read file %d, it should be %d", nBinByte, n-1)
				file.Seek(pos, 0)
				nBinByte, err = reader.Read(binBytes)
				if err != nil {
					log.Error("Test Server read bin %s", err.Error())
					break
				}
				continue
			}
			break
		}

		log.Info("Test Server read file %d, it should be %d", nBinByte, n-1)
		for i := 0; i < nBinByte; i++ {
			if binBytes[i] != bytes[i+1] {
				log.Error("Test Server read not consistent at %d. read:%c receive:%c", i, binBytes[i], bytes[i+1])
			}

		}
		log.Info("Test Server. All Matches.")
		//		log.Info("Test Server Receive %s", string(bytes[:n]))
		_, err = conn.Write([]byte("OK"))
		log.Info("Test Server write")
		if err != nil {
			t.Fatal(err)
		}
		conn.Close()
		log.Info("Test Server closed")
	}
}

func serverText(t *testing.T) {
	file, _ := os.Open("test/cipher.txt")
	reader := bufio.NewReader(file)
	listener, err := net.Listen("tcp4", "127.0.0.1:1244")
	if err != nil {
		t.Fatal(err)
	}
	for {
		conn, err := listener.Accept()
		log.Info("Test Server Incoming %s", conn.RemoteAddr().String())
		if err != nil {
			t.Fatal(err)
		}
		bytes := make([]byte, 1024*32)
		n, err := conn.Read(bytes)
		line, err := reader.ReadString('\n')
		if err != nil {
			log.Error("client read %", err)
			break
		}
		if string(bytes[:n]) != line {
			t.Fatalf("cipher failed %s", string(bytes[:n]))
			t.Fatalf("%s %s", len(bytes[:n]), len([]byte(line)))
			for i := 0; i < n; i++ {
				log.Error("%d", bytes[i]-[]byte(line)[i])
			}

		}
		log.Info("Test Server Receive %s", string(bytes[:n]))
		_, err = conn.Write([]byte("OK"))
		log.Info("Test Server write")
		if err != nil {
			t.Fatal(err)
		}
		conn.Close()
		log.Info("Test Server closed")
	}
}

func clientBin(t *testing.T) {
	file, _ := os.Open("test/hex.bin")
	reader := bufio.NewReader(file)
	var nCount byte
	nCount = 0
	for {
		conn, err := net.Dial("tcp4", "127.0.0.1:1200")
		if err != nil {
			t.Fatal(err)
		}
		binBytes := make([]byte, 1024*4)
		nBinBytes, err := reader.Read(binBytes)
		if err != nil {
			log.Error("client read %", err)

		}
		toBinWrite := make([]byte, len(binBytes)+1)
		copy(toBinWrite[1:], binBytes[:nBinBytes])
		toBinWrite[0] = nCount
		n, _ := conn.Write(toBinWrite)
		if n != nBinBytes+1 {
			log.Error("client not write enough bytes")
		}
		//		log.Info("Test Client write %s", string(binBytes[:n]))
		log.Info("Test Client write %d bytes with count %d", n, nCount)
		nCount++
		bytes := make([]byte, 1024*32)
		n, err = conn.Read(bytes)
		log.Info("Test Client read")
		if err != nil {
			t.Fatal(err)
		}
		log.Info("Test Client Receive %s", bytes[:n])
		fmt.Println("Test Client Receive ", string(bytes[:n]))
		time.Sleep(time.Second * 2)
		conn.Close()
		log.Info("Test Client closed")

	}
}

func clientText(t *testing.T) {
	file, _ := os.Open("test/cipher.txt")
	reader := bufio.NewReader(file)
	for {
		conn, err := net.Dial("tcp4", "127.0.0.1:1200")
		if err != nil {
			t.Fatal(err)
		}
		line, err := reader.ReadString('\n')
		if err != nil {
			log.Error("client read %", err)

		}
		bytesLine := []byte(line)
		n, _ := conn.Write(bytesLine)
		log.Info("Test Client write %s", string(bytesLine[:n]))
		log.Info("Test Client write")
		bytes := make([]byte, 1024*32)
		n, err = conn.Read(bytes)
		log.Info("Test Client read")
		if err != nil {
			t.Fatal(err)
		}
		log.Info("Test Client Receive %s", bytes[:n])
		time.Sleep(time.Second * 2)
		conn.Close()
		log.Info("Test Client closed")

	}
}

func TestTunnel(t *testing.T) {
	log.LogTo("applog/test.log", "DEBUG")
	log.Info("Test Start testing.")
	go serverBin(t)
	go clientBin(t)
	trans1 := protocol.NewTransTCP()
	go trans1.Start("1200", "127.0.0.1", "1201", "client")
	trans2 := protocol.NewTransTCP()
	trans2.Start("1201", "127.0.0.1", "1244", "server")
}