package lmaxapi

import (
	"crypto/tls"
	"io/ioutil"
	"tickserver/api/lmaxapi/response"
	"net"
	"net/http"
	"os"
	"strings"
	"time"
)

var lmax_url string

//MaxIdleConnsPerHost 最多允许10个闲置连接
//这个数目用来应付频繁的下单过程
//trade.lmax.com 证书错误，要忽略这个错误，才能交易
var timeout = time.Duration(5 * time.Second)

func dialTimeout(network, addr string) (net.Conn, error) {
	return net.DialTimeout(network, addr, timeout)
}

var lmax_client = http.Client{
	Transport: &http.Transport{
		Dial:                dialTimeout,
		MaxIdleConnsPerHost: 10,
		TLSClientConfig:     &tls.Config{InsecureSkipVerify: true}}}

func SetBaseUrl(url string) {
	lmax_url = url
}

func httpPost(url string, sessionId string, req IRequest) (*http.Response, error) {
	// tracelog.Println("[POST]", req.Url(), req.GetRequestData().String(), "\n")
	creq, _ := http.NewRequest("POST", url+req.Url(), req.GetRequestData())
	return httpAction(creq, sessionId)
}

func enableLog(filename string) (*os.File, error) {
	logw, e := os.Create(filename)
	if e != nil {
		return nil, e
	}
	EnableLog(logw)
	return logw, nil
}

func httpGet(url string, sessionId string, req IRequest) (*http.Response, error) {
	// tracelog.Println("[GET]", req.Url(), "\n")
	creq, _ := http.NewRequest("GET", url+req.Url(), nil)
	return httpAction(creq, sessionId)
}

func httpAction(creq *http.Request, sessionId string) (*http.Response, error) {
	creq.Header.Add("Content-type", "text/xml")
	creq.Header.Add("Accept", "text/xml")
	creq.Header.Add("Content-Type", "text/xml; UTF-8")

	if sessionId != "" {
		creq.Header.Add("Cookie", sessionId)
	}
	res, err := lmax_client.Do(creq)

	if err != nil {
		return res, err
	}
	return res, nil
}

func httpOpen(url string, sessionId string) (*http.Response, error) {
	creq, _ := http.NewRequest("GET", url, nil)
	creq.Header.Add("Accept", "*/*")
	if sessionId != "" {
		creq.Header.Add("Cookie", sessionId)
	}
	res, err := lmax_client.Do(creq)

	if err != nil {
		return res, err
	}
	return res, nil
}

func Login(req IRequest) (*Session, error) {
	res, err := httpPost(lmax_url, "", req)
	if err != nil {
		code := 0
		if res != nil {
			code = res.StatusCode
		}
		return nil, NewOpError("Login", err, code, true)
	}
	defer res.Body.Close()

	buf, err1 := ioutil.ReadAll(res.Body)
	if err1 != nil {
		return nil, NewOpError("Login", err1, res.StatusCode, true)
	}
	bodyData := string(buf)
	if statusErr := parseOKStatusString(bodyData, "Login", res.StatusCode); statusErr != nil {
		return nil, statusErr
	}
	cookies := res.Cookies()
	var sid string = ""
	for _, v := range cookies {
		sid += v.Name + "=" + v.Value + "; "
	}
	sid = strings.TrimRight(sid, "; ")

	account := response.NewAccountDetails(bodyData)
	//fmt.Println(account.Username)
	return NewSession(lmax_url, sid, account), nil
}

//注册新的账户，任何人都可以注册，没有权限的限制
func Register(req IRequest) error {
	res, err := httpPost(lmax_url, "", req)
	if err != nil {
		code := 0
		if res != nil {
			code = res.StatusCode
		}
		return NewOpError("Register", err, code, true)
	}
	defer res.Body.Close()

	buf, err1 := ioutil.ReadAll(res.Body)
	if err1 != nil {
		return NewOpError("Register", err1, res.StatusCode, true)
	}
	bodyData := string(buf)
	if statusErr := parseOKStatusString(bodyData, "Register", res.StatusCode); statusErr != nil {
		return statusErr
	}
	return nil
}