package debug

import (
	"bytes"
	"encoding/json"
	"io"
	"io/ioutil"
	"log"
	"net/http"
)

// PrintError print error with debug
func PrintError(err error, debug bool) {
	if !debug {
		return
	}
	log.Println("[DEBUG] [ERROR]", err)
}

// PrintStringResponse print string response with debug
func PrintStringResponse(str string, debug bool) {
	if !debug {
		return
	}
	log.Println("[DEBUG] [RESPONSE]", str)
}

// PrintGetRequest print get request with debug
func PrintGetRequest(url string, debug bool) {
	if !debug {
		return
	}
	log.Println("[DEBUG] [API] GET", url)
}

// PrintPostJSONRequest print json request with debug
func PrintPostJSONRequest(url string, body []byte, debug bool) {
	if !debug {
		return
	}
	const format = "[DEBUG] [API] JSON POST %s\n" +
		"http request body:\n%s\n"

	buf := bytes.NewBuffer(make([]byte, 0, len(body)+1024))
	if err := json.Indent(buf, body, "", "    "); err == nil {
		body = buf.Bytes()
	}
	log.Printf(format, url, body)
}

// PrintJSONRequest print json request with debug
func PrintJSONRequest(method string, url string, header http.Header, body []byte, debug bool) {
	if !debug {
		return
	}

	const format = "[DEBUG] [API] JSON %s %s\n" +
		"http request header:\n%s\n" +
		"http request body:\n%s\n"

	buf := bytes.NewBuffer(make([]byte, 0, len(body)+1024))
	if err := json.Indent(buf, body, "", "    "); err == nil {
		body = buf.Bytes()
	}

	headerJson, _ := json.Marshal(header)

	log.Printf(format, method, url, headerJson, body)
}

// PrintPostMultipartRequest print multipart/form-data post request with debug
func PrintPostMultipartRequest(url string, mp map[string]string, debug bool) {
	if !debug {
		return
	}
	body, _ := json.Marshal(mp)
	const format = "[DEBUG] [API] multipart/form-data POST %s\n" +
		"http request body:\n%s\n"

	buf := bytes.NewBuffer(make([]byte, 0, len(body)+1024))
	if err := json.Indent(buf, body, "", "    "); err == nil {
		body = buf.Bytes()
	}
	log.Printf(format, url, body)
}

// DecodeJSONHttpResponse decode json response with debug
func DecodeJSONHttpResponse(r io.Reader, v interface{}, debug bool) error {
	if !debug {
		return json.NewDecoder(r).Decode(v)
	}
	body, err := ioutil.ReadAll(r)
	if err != nil {
		return err
	}

	body2 := body
	buf := bytes.NewBuffer(make([]byte, 0, len(body2)+1024))
	if err := json.Indent(buf, body2, "", "    "); err == nil {
		body2 = buf.Bytes()
	}
	log.Printf("[DEBUG] [API] http response body:\n%s\n", body2)

	return json.Unmarshal(body, v)
}