package fnpsapi

import (
	"crypto/sha256"
	"encoding/base64"
	"encoding/json"
	"fmt"
	"git.rosy.net.cn/baseapi"
	"net/http"
	"strings"
	"sync"
	"time"

	"git.rosy.net.cn/baseapi/platformapi"
	"git.rosy.net.cn/baseapi/utils"
)

func (a *API) SetToken(token string) {
	a.locker.Lock()
	defer a.locker.Unlock()
	a.accessToken = token
}

func New(appID, appSecret, merchantId string, config ...*platformapi.APIConfig) *API {
	curConfig := platformapi.DefAPIConfig
	if len(config) > 0 {
		curConfig = *config[0]
	}
	return &API{
		grantType:   "authorization_code", // 授权模式，填固定值authorization_code
		code:        "cod3",
		appID:       appID,
		merchantId:  merchantId,
		signature:   "",
		timestamp:   time.Now().UnixNano(),
		accessToken: "",
		appSecret:   appSecret,
		locker:      sync.RWMutex{},
		client:      &http.Client{Timeout: curConfig.ClientTimeout},
		config:      &curConfig,
	}
}

// signParam2 apiV3签名算法SHA-256
func (a *API) signParam2() (sig string) {
	sb := new(strings.Builder)
	sb.WriteString("grant_type=")
	sb.WriteString("CODE") //todo
	sb.WriteString("&code=")
	sb.WriteString(a.code) //todo
	sb.WriteString("&app_id=")
	sb.WriteString(a.appID)
	sb.WriteString("&merchant_id=")
	sb.WriteString(a.merchantId)
	sb.WriteString("&timestamp=")
	sb.WriteString(utils.Int64ToStr(a.timestamp))
	sig = sb.String()
	sig = base64.StdEncoding.EncodeToString(sha256.New().Sum([]byte(sig)))
	return sig
}

func (a *API) AccessAPI(baseUrl, actionApi, method string, bizParams map[string]interface{}) (retVal map[string]interface{}, err error) {
	// 序列化
	data, err := json.Marshal(bizParams)
	if err != nil {
		return nil, err
	}

	// 全路径请求参数
	fullURL := utils.GenerateGetURL(baseUrl, actionApi, nil)

	// 发送请求
	sendUrl := func() *http.Request {
		var request *http.Request
		if method == "POST" {
			request, _ = http.NewRequest(http.MethodPost, fullURL, strings.NewReader(string(data)))
		} else {
			request, _ = http.NewRequest(http.MethodGet, utils.GenerateGetURL(baseUrl, actionApi, bizParams), nil)
		}
		request.Header.Set("Content-Type", "application/json")
		return request
	}

	// 数据解析
	dataMarshal := func(response *http.Response, bodyStr string, jsonResult1 map[string]interface{}) (errLevel string, err error) {
		if jsonResult1 == nil {
			return platformapi.ErrLevelRecoverableErr, fmt.Errorf("mapData is nil")
		}
		if err != nil {
			return "", err
		}
		if utils.MustInterface2Int64(jsonResult1["code"]) != 200 {
			errLevel = platformapi.ErrLevelGeneralFail
			err = utils.NewErrorCode(jsonResult1["msg"].(string), utils.Int64ToStr(utils.MustInterface2Int64(jsonResult1["code"])))
			baseapi.SugarLogger.Debugf("fnps AccessAPI failed, jsonResult1:%s", utils.Format4Output(jsonResult1, true))
		}
		retVal = jsonResult1
		return errLevel, err
	}

	err = platformapi.AccessPlatformAPIWithRetry(a.client, sendUrl, a.config, dataMarshal)
	return retVal, err
}

// 获取access_token
func (a *API) GetAccessToken() (tokenInfo *TokenInfo, err error) {
	result, err := a.AccessAPI(TokenURL, "", RequestPost, nil)
	if err != nil {
		return nil, err
	}
	if err := utils.Map2StructByJson(result["data"], &tokenInfo, false); err != nil {
		return nil, err
	}

	return tokenInfo, err
}