package knowledge

import (
	"bytes"
	"eta_gn/eta_bridge/global"
	"eta_gn/eta_bridge/utils"
	"io"
	"mime/multipart"
	"net/http"
	"strconv"
	"time"

	"github.com/gin-gonic/gin"
)

type KnowledgeUploadResp struct {
	Ret     int
	Msg     string
	ErrMsg  string `json:"-"`
	Success bool   `description:"true 执行成功，false 执行失败"`
}

func ForwardRequest(c *gin.Context, targetURL string) (responseBody []byte, err error) {
	// 获取文件
	form, err := c.MultipartForm()
	if err != nil {
		return
	}

	// 将文件数据重新封装为multipart/form-data格式
	body := new(bytes.Buffer)
	writer := multipart.NewWriter(body)

	// 将原请求的文件添加到新的multipart请求体中
	for _, files := range form.File {
		for _, file := range files {
			part, er := writer.CreateFormFile(file.Filename, file.Filename)
			if er != nil {
				err = er
				return
			}

			// 打开文件并写入到multipart的部分
			fileContent, er := file.Open()
			if er != nil {
				err = er
				return
			}
			_, er = io.Copy(part, fileContent)
			if er != nil {
				err = er
				return
			}
		}
	}

	// 将body的内容写入
	for k, v := range c.Request.PostForm {
		for _, value := range v {
			writer.WriteField(k, value)
		}
	}
	writer.Close()

	// 2. 构造一个新的请求并转发
	req, err := http.NewRequest(c.Request.Method, targetURL, body)
	if err != nil {
		return
	}

	// 设置Content-Type为multipart/form-data
	req.Header.Set("Content-Type", writer.FormDataContentType())
	nonce := utils.GetRandStringNoSpecialChar(32)
	timeStamp := time.Now().UnixMilli() / 1000
	signature := utils.GetSign(global.CONFIG.EtaReport.AppId, global.CONFIG.EtaReport.Secret, nonce, strconv.Itoa(int(timeStamp)))
	req.Header.Set("nonce", utils.GetRandStringNoSpecialChar(32))
	req.Header.Set("timestamp", strconv.Itoa(int(timeStamp)))
	req.Header.Set("appid", global.CONFIG.EtaReport.AppId)
	req.Header.Set("signature", signature)

	// 3. 执行请求并处理响应
	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		return
	}
	defer resp.Body.Close()

	// 将目标服务的响应写回给客户端
	responseBody, err = io.ReadAll(resp.Body)
	if err != nil {
		return
	}
	return
}