package fnpsapi

import (
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"
	"errors"
	"fmt"
	"net/http"
	"sort"
	"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 (a *API) SetRefreshToken(token string) {
	a.locker.Lock()
	defer a.locker.Unlock()
	a.refreshToken = token
}

func (a *API) MakeFnRequestHead() map[string]interface{} {
	requestParam := make(map[string]interface{}, 6)
	requestParam["access_token"] = a.accessToken
	requestParam["signature"] = a.signature
	requestParam["merchant_id"] = a.merchantId
	requestParam["version"] = a.version
	requestParam["app_id"] = a.appID
	requestParam["timestamp"] = a.timestamp
	return requestParam
}
func New(appID, appSecret, merchantId, code string, config ...*platformapi.APIConfig) *API {
	curConfig := platformapi.DefAPIConfig
	if len(config) > 0 {
		curConfig = *config[0]
	}
	if appID == "" {
		return nil
	}
	// 查询蜂鸟refeshToken
	return &API{
		grantType:    "authorization_code", // 授权模式，填固定值authorization_code
		code:         code,
		appID:        appID,
		merchantId:   merchantId,
		signature:    "",
		accessToken:  "",
		refreshToken: "",
		version:      "1.0",
		appSecret:    appSecret,
		locker:       sync.RWMutex{},
		client:       &http.Client{Timeout: curConfig.ClientTimeout},
		config:       &curConfig,
	}
}

func (a *API) signParam(params map[string]interface{}) (sig string) {
	var valueList []string
	for k, v := range params {
		if k != "signature" {
			if str := fmt.Sprint(v); str != "" {
				valueList = append(valueList, fmt.Sprintf("%s=%s", k, str))
			}
		}
	}
	sort.Sort(sort.StringSlice(valueList))
	sig = strings.Join(valueList, "&")
	sig = a.appSecret + sig
	signature := sha256.Sum256([]byte(sig))
	return hex.EncodeToString(signature[:])
}

func (a *API) AccessAPI(baseUrl, actionApi, method string, bizParams map[string]interface{}) (retVal map[string]interface{}, err error) {
	bizParams["timestamp"] = utils.Int64ToStr(time.Now().Unix() * 1000)
	bizParams["signature"] = a.signParam(bizParams)
	// 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 http.MethodPost == method {
			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"])))
		}
		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) {
	parameter := make(map[string]interface{}, 6)
	parameter["grant_type"] = "refresh_token"
	parameter["app_id"] = a.appID
	parameter["merchant_id"] = a.merchantId

	// 先去刷新token,没有的话再去获取token(code只能使用一次,生成的token管一年)
	var result map[string]interface{}
	switch {
	case a.accessToken != "" && a.refreshToken != "":
		parameter["refresh_token"] = a.refreshToken
		result, err = a.AccessAPI(RefreshTokenUrl, "", http.MethodPost, parameter)
	case a.accessToken == "" && a.refreshToken == "":
		parameter["grant_type"] = "authorization_code"
		parameter["code"] = a.code
		result, err = a.AccessAPI(TokenURL, "", http.MethodPost, parameter)
	default:
		return nil, errors.New("更换code,请在配置表中删除原蜂鸟token")
	}
	if err != nil {
		return nil, err
	}
	if err := utils.Map2StructByJson(result, &tokenInfo, false); err != nil {
		return nil, err
	}

	businessData := &BusinessData{}
	if err := json.Unmarshal([]byte(utils.Interface2String(result["business_data"])), businessData); err != nil {
		return nil, err
	}
	tokenInfo.BusinessDataObj = businessData
	return tokenInfo, err
}