package http

import (
	"encoding/json"
	"github.com/go-kratos/kratos/v2/errors"
	"github.com/go-kratos/kratos/v2/transport/http"
	stdhttp "net/http"
	"strings"
)

const (
	baseContentType = "application"
)

type Response struct {
	Code    int         `json:"code" form:"code"`
	Data    interface{} `json:"data" form:"data"`
	Message string      `json:"message" form:"message"`
}

func ResponseEncoder(w stdhttp.ResponseWriter, r *stdhttp.Request, data interface{}) error {
	rsp := &Response{
		Code:    200,
		Message: "success",
		Data:    data,
	}
	codec, _ := http.CodecForRequest(r, "Accept")

	var dataInterface interface{}
	{
		data, _ := codec.Marshal(data)
		_ = json.Unmarshal(data, &dataInterface)
		rsp.Data = dataInterface
	}

	rspJson, err := codec.Marshal(rsp)
	if err != nil {
		return err
	}
	w.Header().Set("Content-Type", ContentType(codec.Name()))
	w.WriteHeader(stdhttp.StatusOK)
	w.Write(rspJson)

	return nil
}

func ErrorEncoderPro(w stdhttp.ResponseWriter, r *stdhttp.Request, err error) {
	// 如果是正式服，则统一抛出服务器错误
	if errors.IsInternalServer(err) {
		err = errors.InternalServer("internal err", "服务出错")
	}

	se := errors.FromError(err)
	codec, _ := http.CodecForRequest(r, "Accept")
	body, err := codec.Marshal(se)
	if err != nil {
		w.WriteHeader(stdhttp.StatusInternalServerError)
		return
	}
	w.Header().Set("Content-Type", ContentType(codec.Name()))
	w.WriteHeader(int(se.Code))
	_, _ = w.Write(body)
}

// ContentType returns the content-type with base prefix.
func ContentType(subtype string) string {
	return strings.Join([]string{baseContentType, subtype}, "/")
}