package requests

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

// Response 响应内容包含http.Response 已读
type Response struct {
	readContent  string
	readResponse *http.Response
}

// FromHTTPResponse 生成Response 从标准http.Response
func FromHTTPResponse(resp *http.Response) (*Response, error) {
	var err 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 {
		return nil, err
	}
	resp.Body.Close()

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

	var reader io.ReadCloser
	if reader, err = gzip.NewReader(srcReader); err == nil {
		defer reader.Close()
		buf, err := ioutil.ReadAll(reader)
		if err != nil {
			return nil, err
		}
		content = string(buf)
	} else if reader, err = zlib.NewReader(srcReader); err == nil {
		defer reader.Close()
		buf, err := ioutil.ReadAll(reader)
		if err != nil {
			return nil, err
		}
		content = string(buf)
	} else {
		content = string(srcbuf)
	}

	return &Response{readContent: content, readResponse: resp}, nil
}

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