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, isDecompressNoAccept bool) (*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 := ""

	if isDecompressNoAccept {
		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)
		}

	} 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
}

// GetSrcResponse  获取原生golang http.Response
func (gresp *Response) GetSrcResponse() *http.Response {
	return gresp.readResponse
}