// Copyright 2020 gf Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.

package ghttp

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"net/http"
	"net/http/httputil"

	"github.com/gogf/gf/text/gstr"
	"github.com/gogf/gf/util/gconv"
)

// dumpTextFormat is the format of the dumped raw string
const dumpTextFormat = `+---------------------------------------------+
|                    %s                 |
+---------------------------------------------+
%s
%s
`

// ifDumpBody determines whether to output body according to content-type.
func ifDumpBody(contentType string) bool {
	// the body should not be output when the body is html or stream.
	if gstr.Contains(contentType, "application/json") ||
		gstr.Contains(contentType, "application/xml") ||
		gstr.Contains(contentType, "multipart/form-data") ||
		gstr.Contains(contentType, "application/x-www-form-urlencoded") ||
		gstr.Contains(contentType, "text/plain") {
		return true
	}
	return false
}

// getRequestBody returns the raw text of the request body.
func getRequestBody(req *http.Request) string {
	contentType := req.Header.Get("Content-Type")
	if !ifDumpBody(contentType) {
		return ""
	}
	// so that the request body can be read again.
	bodyReader, errGetBody := req.GetBody()
	if errGetBody != nil {
		return ""
	}
	bytesBody, errReadBody := ioutil.ReadAll(bodyReader)
	if errReadBody != nil {
		return ""
	}
	return gconv.UnsafeBytesToStr(bytesBody)
}

// getResponseBody returns the text of the response body.
func getResponseBody(resp *http.Response) string {
	contentType := resp.Header.Get("Content-Type")
	if !ifDumpBody(contentType) {
		return ""
	}
	bytesBody, errReadBody := ioutil.ReadAll(resp.Body)
	if errReadBody != nil {
		return ""
	}
	// So the response body can be read again.
	resp.Body = ioutil.NopCloser(bytes.NewBuffer(bytesBody))
	return gconv.UnsafeBytesToStr(bytesBody)
}

// RawRequest returns the raw content of the request.
func (r *ClientResponse) RawRequest() string {
	// ClientResponse can be nil.
	if r == nil {
		return ""
	}
	if r.request == nil {
		return ""
	}
	// DumpRequestOut writes more request headers than DumpRequest, such as User-Agent.
	bs, err := httputil.DumpRequestOut(r.request, false)
	if err != nil {
		return ""
	}
	return fmt.Sprintf(
		dumpTextFormat,
		"REQUEST ",
		gconv.UnsafeBytesToStr(bs),
		getRequestBody(r.request),
	)
}

// RawResponse returns the raw content of the response.
func (r *ClientResponse) RawResponse() string {
	// ClientResponse can be nil.
	if r == nil || r.Response == nil {
		return ""
	}
	bs, err := httputil.DumpResponse(r.Response, false)
	if err != nil {
		return ""
	}

	return fmt.Sprintf(
		dumpTextFormat,
		"RESPONSE",
		gconv.UnsafeBytesToStr(bs),
		getResponseBody(r.Response),
	)
}

// Raw returns the raw text of the request and the response.
func (r *ClientResponse) Raw() string {
	return fmt.Sprintf("%s\n%s", r.RawRequest(), r.RawResponse())
}