package requests

import (
	"bytes"
	"compress/gzip"
	"compress/zlib"
	"io"
	"io/ioutil"
	"net/http"
)

// Response 响应内容包含http.Response
type Response struct {
	DContent  string
	GResponse *http.Response
}

// FromHTTPResponse 生成Response 从标准http.Response
func FromHTTPResponse(resp *http.Response) (*Response, error) {

	// 复制response 返回内容 并且测试是否有解压的需求
	srcbuf, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		panic(err)
	}
	resp.Body.Close()

	cbuf := bytes.NewBuffer([]byte{})
	_, err = io.Copy(cbuf, bytes.NewReader(srcbuf))

	if err != nil {
		panic(err)
	}

	resp.Body = ioutil.NopCloser(cbuf)

	content := string(srcbuf)
	srcReader := bytes.NewReader(srcbuf)

	if r, err := gzip.NewReader(srcReader); err == nil {
		defer r.Close()
		buf, err := ioutil.ReadAll(r)
		if err != nil {
			panic(err)
		}
		content = string(buf)
	} else if r, err := zlib.NewReader(srcReader); err == nil {
		defer r.Close()
		buf, err := ioutil.ReadAll(r)
		if err != nil {
			panic(err)
		}
		content = string(buf)
	}

	return &Response{DContent: content, GResponse: resp}, nil
}

// Content 返回解压后的内容
func (gresp *Response) Content() string {
	return gresp.DContent
}