package main

/*
#include <stdlib.h>
*/
import "C"
import (
	"encoding/json"
	"fmt"
	"github.com/parnurzeal/gorequest"
	"unsafe"
)

/*
 * 接口转发
 * param requestMethod[string] 请求方式 现在只支持GET\POST\PUT
 * param erpUrl[string] erpURl地址
 * param requestJson[string] 请求json字符串
 * return 订单同步结构体字符串,错误信息
 */
func interfaceForward(requestMethod, erpUrl string, requestJson string) (string, error) {
	var reqJson map[string]interface{}
	err := json.Unmarshal([]byte(requestJson), &reqJson)
	if err != nil {
		return "", fmt.Errorf("requestJson JSON解析失败: %v", err)
	}
	request := gorequest.New()
	switch requestMethod {
	case "POST":
		resp, body, errs := request.Post(erpUrl).
			Type("multipart").
			Send(reqJson).
			End()
		if errs != nil {
			return "", fmt.Errorf("请求失败: %v", errs)
		}
		if resp.StatusCode != 200 {
			return "", fmt.Errorf("HTTP状态码异常: %d, 响应: %s", resp.StatusCode, body)
		}
		return body, nil
	case "GET":
		var erpNewUrl string
		erpUrl = erpUrl + "?"
		count := 0
		total := len(reqJson)

		for k, v := range reqJson {
			fmt.Println(k, v)
			erpNewUrl = fmt.Sprintf("%s=%s", k, v)
			erpUrl = erpUrl + erpNewUrl

			count++
			if count < total {
				erpUrl = erpUrl + "&"
			}
		}
		fmt.Println(erpNewUrl)
		resp, body, errs := request.Get(erpUrl).
			End()
		if errs != nil {
			return "", fmt.Errorf("请求失败: %v", errs)
		}
		if resp.StatusCode != 200 {
			return "", fmt.Errorf("HTTP状态码异常: %d, 响应: %s", resp.StatusCode, body)
		}
		return body, nil
	case "PUT":
		resp, body, errs := request.Put(erpUrl).
			Send(requestJson).
			End()
		if errs != nil {
			return "", fmt.Errorf("请求失败: %v", errs)
		}
		if resp.StatusCode != 200 {
			return "", fmt.Errorf("HTTP状态码异常: %d, 响应: %s", resp.StatusCode, body)
		}
		return body, nil
	}
	return "", fmt.Errorf("请求失败，请求方式: %s", requestMethod)
}

// InterfaceForward 接口转发
//
//export InterfaceForward
func InterfaceForward(requestMethod, erpUrl *C.char, requestJson *C.char) *C.char {
	goRequestMethod := C.GoString(requestMethod)
	goErpUrl := C.GoString(erpUrl)
	goEequestJson := C.GoString(requestJson)
	synchronization, err := interfaceForward(goRequestMethod, goErpUrl, goEequestJson)
	if err != nil {
		return C.CString(err.Error())
	}
	return C.CString(synchronization)
}

// FreeCString 释放C字符串内存
//
//export FreeCString
func FreeCString(str *C.char) {
	C.free(unsafe.Pointer(str))
}

// 空main函数，编译DLL时需要
func main() {
}