package jd

import (
	"encoding/json"
)

//SDK is sdk for jd
type SDK struct {
	response []byte
	fmap     map[string]func(*RequestJD)
	fname    string
	err      error
}

//Init is init sdk
func (s *SDK) Init() {
	s.fmap = make(map[string]func(*RequestJD))
}

//SelectFunction is select func
func (s *SDK) SelectFunction(fname string) *SDK {
	s.fname = fname
	return s
}

//WithArgs is request args
func (s *SDK) WithArgs(args *RequestJD) *SDK {
	f := s.fmap[s.fname]
	f(args)
	return s
}

// Result is func result
func (s *SDK) Result() (*SDK, error) {
	return s, s.err
}

// Register is register func
func (s *SDK) Register(name string, f func(*RequestJD)) {
	s.fmap[name] = f
}

//ToBytes is return []byte
func (s *SDK) ToBytes() []byte {
	return s.response
}

// ToString is return string
func (s *SDK) ToString() string {
	return string(s.response)
}

//ToMapInterface is return map[string]interface{}
func (s *SDK) ToMapInterface() map[string]interface{} {
	m := make(map[string]interface{})
	json.Unmarshal(s.response, &m)
	return m
}

// Featured is jd 精选列表
func (s *SDK) Featured(r *RequestJD) {
	d, err := Featured(r)
	if err != nil {
		s.err = err
	}
	s.response = d
}

// Guess is 猜你喜欢列表
func (s *SDK) Guess(r *RequestJD) {
	d, err := Guess(r)
	if err != nil {
		s.err = err
	}
	s.response = d
}

// Recommend is 推荐列表
func (s *SDK) Recommend(r *RequestJD) {
	d, err := Recommend(r)
	if err != nil {
		s.err = err
	}
	s.response = d
}

//NewJDSDK is jingdong sdk
func NewJDSDK() *SDK {
	sdk := new(SDK)
	sdk.Init()
	sdk.Register("featured", sdk.Featured)
	sdk.Register("guess", sdk.Guess)
	sdk.Register("recommend", sdk.Recommend)
	return sdk
}