package service

import (
	"encoding/json"
	"fmt"
	"math"
	"net/http"
	"strconv"
	"strings"
	"time"
)

type Service struct {
	store         *StoreManager
	operationLogs *OperationLogStore
	runtimeLogs   *RuntimeLogStore
}

func NewService(dataPath string, runtimeLogStores ...*RuntimeLogStore) (*Service, error) {
	store, err := NewStoreManager(dataPath)
	if err != nil {
		return nil, err
	}
	runtimeLogs := NewRuntimeLogStore()
	if len(runtimeLogStores) > 0 && runtimeLogStores[0] != nil {
		runtimeLogs = runtimeLogStores[0]
	}
	return &Service{store: store, operationLogs: NewOperationLogStore(), runtimeLogs: runtimeLogs}, nil
}

func (s *Service) Router() http.Handler {
	mux := http.NewServeMux()
	mux.HandleFunc("/healthz", s.health)
	mux.HandleFunc("/api/state", s.adminState)
	mux.HandleFunc("/api/appids", s.adminAppIDs)
	mux.HandleFunc("/api/cards", s.adminCards)
	mux.HandleFunc("/api/card-groups", s.adminCardGroups)
	mux.HandleFunc("/api/cards/export", s.adminCardsExport)
	mux.HandleFunc("/api/settings", s.adminSettings)
	mux.HandleFunc("/api/orders", s.adminOrders)
	mux.HandleFunc("/api/operation-logs", s.adminOperationLogs)
	mux.HandleFunc("/api/runtime-logs", s.adminRuntimeLogs)
	mux.HandleFunc("/api/sync", s.adminSync)
	mux.HandleFunc("/api/generate", s.adminGenerate)
	mux.HandleFunc("/sim/", s.chanAPI)
	mux.HandleFunc("/v5/", s.oneLink)
	mux.HandleFunc("/ec/", s.oneLink)
	return withCORS(s.withOperationLogging(mux))
}

func withCORS(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Access-Control-Allow-Origin", "*")
		w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
		if r.Method == http.MethodOptions {
			w.WriteHeader(http.StatusNoContent)
			return
		}
		next.ServeHTTP(w, r)
	})
}

func (s *Service) health(w http.ResponseWriter, r *http.Request) {
	writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
}

func (s *Service) oneLink(w http.ResponseWriter, r *http.Request) {
	path := strings.TrimPrefix(r.URL.Path, "/v5/")
	path = strings.TrimPrefix(path, "/")
	switch path {
	case "ec/get/token":
		s.getToken(w, r)
	case "ec/query/sim-basic-info":
		s.withToken(w, r, s.queryBasicInfo)
	case "ec/query/sim-session":
		s.withToken(w, r, s.querySession)
	case "ec/query/sim-status":
		s.withToken(w, r, s.queryStatus)
	case "ec/query/sim-stop-reason":
		s.withToken(w, r, s.queryStopReason)
	case "ec/query/sim-frozen-state-info":
		s.withToken(w, r, s.queryFrozenState)
	case "ec/query/sim-apn-session-info":
		s.withToken(w, r, s.queryAPNSession)
	case "ec/query/sim-activated-features-info":
		s.withToken(w, r, s.queryActivatedFeatures)
	case "ec/query/sim-operating-status":
		s.withToken(w, r, s.queryOperatingStatus)
	case "ec/query/sim-data-diagnosis":
		s.withToken(w, r, s.queryDataDiagnosis)
	case "ec/query/sim-imei":
		s.withToken(w, r, s.queryIMEI)
	case "ec/query/sim-data-usage-inpool":
		s.withToken(w, r, s.queryDataUsageInPool)
	case "ec/query/sim-data-usage":
		s.withToken(w, r, s.queryDataUsage)
	case "ec/query/sim-data-usage-monthly/batch":
		s.withToken(w, r, s.queryDataUsageMonthlyBatch)
	case "ec/query/sim-data-usage-daily/batch":
		s.withToken(w, r, s.queryDataUsageDailyBatch)
	case "ec/query/apn-info":
		s.withToken(w, r, s.queryAPNInfo)
	case "ec/query/card-bind-status":
		s.withToken(w, r, s.queryCardBindStatus)
	case "ec/query/on-off-status":
		s.withToken(w, r, s.queryOnOffStatus)
	case "ec/query/region-limit-status":
		s.withToken(w, r, s.queryRegionLimitStatus)
	case "ec/change/sim-status":
		s.withToken(w, r, s.changeSIMStatus)
	case "ec/operate/sim-apn-function":
		s.withToken(w, r, s.operateSIMAPNFunction)
	default:
		writeOneLink(w, Response{Status: "14008", Message: "查询不到信息", Result: []interface{}{}})
	}
}

func (s *Service) getToken(w http.ResponseWriter, r *http.Request) {
	q := r.URL.Query()
	appid := q.Get("appid")
	password := q.Get("password")
	refresh := q.Get("refresh")
	var result Response

	err := s.store.SaveMutation(func(st *Store) error {
		for i := range st.AppIDs {
			cred := &st.AppIDs[i]
			if cred.AppID != appid || !cred.Enabled {
				continue
			}
			if cred.Password != password {
				result = Response{Status: "12022", Message: "PASSWORD 鉴权不通过", Result: []interface{}{}}
				return nil
			}
			now := time.Now()
			if refresh == "0" {
				if token, ok := st.Tokens[appid]; ok && token.ExpiresAt.After(now) {
					ttl := int(time.Until(token.ExpiresAt).Seconds())
					result = okResp(map[string]string{"token": token.Value, "ttl": strconv.Itoa(ttl)})
					return nil
				}
			}
			token := Token{
				AppID:     appid,
				Value:     randomHex(32),
				ExpiresAt: now.Add(time.Hour),
			}
			st.Tokens[appid] = token
			cred.LastToken = token.Value
			cred.TokenExpires = token.ExpiresAt.Format("2006-01-02 15:04:05")
			result = okResp(map[string]string{"token": token.Value, "ttl": "3600"})
			return nil
		}
		result = Response{Status: "12021", Message: "认证无效", Result: []interface{}{}}
		return nil
	})
	if err != nil {
		writeOneLink(w, Response{Status: "19000", Message: err.Error(), Result: []interface{}{}})
		return
	}
	writeOneLink(w, result)
}

func (s *Service) withToken(w http.ResponseWriter, r *http.Request, next func(http.ResponseWriter, *http.Request, Store)) {
	token := r.URL.Query().Get("token")
	st := s.store.Snapshot()
	for _, t := range st.Tokens {
		if t.Value == token && t.ExpiresAt.After(time.Now()) {
			next(w, r, st)
			return
		}
	}
	writeOneLink(w, Response{Status: "12021", Message: "TOKEN 不存在或已过期，请重新获取", Result: []interface{}{}})
}

func (s *Service) queryBasicInfo(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	writeOneLink(w, okResp(map[string]string{
		"msisdn": card.MSISDN, "imsi": card.IMSI, "iccid": card.ICCID,
		"activeDate": card.ActiveDate, "openDate": card.OpenDate, "remark": card.Remark,
	}))
}

func (s *Service) querySession(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	writeOneLink(w, okResp(map[string]interface{}{
		"simSessionList": []map[string]string{{
			"apnId": "CMIOT", "status": card.SessionStatus, "ip": card.IP,
			"ipv6Prefix": card.IPv6Prefix, "ipv6": card.IPv6,
			"createDate": card.LastChangeDate, "rat": card.RAT,
		}},
	}))
}

func (s *Service) queryStatus(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	writeOneLink(w, okResp(map[string]string{"cardStatus": card.CardStatus, "lastChangeDate": card.LastChangeDate}))
}

func (s *Service) queryStopReason(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	stopReason := card.StopReason
	if stopReason == "" {
		stopReason = defaultStopReason(card.CardStatus)
	}
	writeOneLink(w, okResp(map[string]string{"platformType": "OneLink-CT", "stopReason": stopReason}))
}

func (s *Service) queryFrozenState(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	frozen := card.FrozenStatus
	if frozen == "" {
		frozen = "0"
	}
	operTime := card.FrozenOperTime
	if operTime == "" {
		operTime = diagnosticTime(parseCardTime(card.LastChangeDate))
	}
	data := map[string]string{"frozenStatus": frozen, "operTime": operTime}
	if frozen == "1" && card.FrozenReason != "" {
		data["frozenReason"] = card.FrozenReason
	}
	writeOneLink(w, okResp(data))
}

func (s *Service) queryAPNSession(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	items := make([]map[string]string, 0, len(card.APNs))
	for _, apn := range card.APNs {
		status := card.SessionStatus
		if status != "00" && status != "01" {
			status = "00"
		}
		createTime := card.SessionCreateDate
		if createTime == "" {
			createTime = card.LastChangeDate
		}
		items = append(items, map[string]string{"apn": apn.Name, "sessionStatus": status, "ipv4": card.IP, "ipv6Prefix": card.IPv6Prefix, "ipv6": card.IPv6, "createTime": createTime, "accessType": accessType(card.RAT)})
	}
	if len(items) == 0 {
		status := card.SessionStatus
		if status != "00" && status != "01" {
			status = "00"
		}
		createTime := card.SessionCreateDate
		if createTime == "" {
			createTime = card.LastChangeDate
		}
		items = append(items, map[string]string{"apn": "CMIOT", "sessionStatus": status, "ipv4": card.IP, "ipv6Prefix": card.IPv6Prefix, "ipv6": card.IPv6, "createTime": createTime, "accessType": accessType(card.RAT)})
	}
	writeOneLink(w, okResp(map[string]interface{}{"infoList": items}))
}

func (s *Service) queryActivatedFeatures(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	items := make([]map[string]string, 0, len(card.APNs))
	for _, apn := range card.APNs {
		openStatus := "0"
		if apn.Status == "1" {
			openStatus = "1"
		}
		changeTime := apn.ModifyTime
		if changeTime == "" {
			changeTime = diagnosticTime(parseCardTime(card.LastChangeDate))
		}
		items = append(items, map[string]string{"functionType": "11", "openStatus": openStatus, "apn": apn.Name, "changeTime": changeTime})
	}
	if len(items) == 0 {
		items = append(items, map[string]string{"functionType": "11", "openStatus": "1", "apn": "CMIOT", "changeTime": diagnosticTime(parseCardTime(card.LastChangeDate))})
	}
	writeOneLink(w, okResp(map[string]interface{}{"communicationFunctionList": items}))
}

func (s *Service) queryOperatingStatus(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	writeOneLink(w, okResp(map[string]string{"operatingStatus": card.OnOffStatus}))
}

func (s *Service) queryDataDiagnosis(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	apnInfo := make([]map[string]interface{}, 0, len(card.APNs))
	for _, apn := range card.APNs {
		status := apn.DiagnosisStatus
		if status == "" {
			status = "2"
		}
		modifyTime := apn.ModifyTime
		if modifyTime == "" {
			modifyTime = diagnosticTime(parseCardTime(card.LastChangeDate))
		}
		usageState := apn.ServiceUsageState
		if usageState == "" {
			usageState = "1"
		}
		item := map[string]interface{}{"apnName": apn.Name, "apnStatus": status, "modifyTime": modifyTime, "apnServiceUsageState": usageState}
		if status == "4" && apn.OverUseDetails != "" {
			item["overUseDetails"] = apn.OverUseDetails
		}
		pccInfo := make([]map[string]string, 0, len(apn.PCCs))
		for _, pcc := range apn.PCCs {
			pccTime := pcc.ModifyTime
			if pccTime == "" {
				pccTime = modifyTime
			}
			pccInfo = append(pccInfo, map[string]string{"pccServiceCode": pcc.ServiceCode, "pccName": pcc.Name, "pccPolicyStatus": pcc.PolicyStatus, "pccServiceUsageState": pcc.ServiceUsageState, "modifyTime": pccTime})
		}
		item["pccList"] = map[string]interface{}{"pccInfo": pccInfo}
		apnInfo = append(apnInfo, item)
	}
	if len(apnInfo) == 0 {
		apnInfo = append(apnInfo, map[string]interface{}{"apnName": "CMIOT", "apnStatus": "2", "modifyTime": diagnosticTime(parseCardTime(card.LastChangeDate)), "apnServiceUsageState": "1", "pccList": map[string]interface{}{"pccInfo": []map[string]string{}}})
	}
	writeOneLink(w, okResp(map[string]interface{}{"apnList": map[string]interface{}{"apnInfo": apnInfo}}))
}

func accessType(rat string) string {
	switch strings.ToUpper(rat) {
	case "5G", "51", "SA":
		return "51"
	case "NSA", "10":
		return "10"
	case "REDCAP", "58":
		return "58"
	case "NB", "8":
		return "8"
	case "2G", "2":
		return "2"
	case "3G", "3":
		return "1"
	default:
		return "6"
	}
}

func (s *Service) queryIMEI(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	writeOneLink(w, okResp(map[string]string{"imei": card.IMEI}))
}

func (s *Service) queryDataUsageInPool(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	apns := make([]map[string]string, 0, len(card.APNs))
	for _, apn := range card.APNs {
		apns = append(apns, map[string]string{"apnName": apn.Name, "apnUseAmount": fmtAmount(apn.UsageBytes)})
	}
	writeOneLink(w, okResp(map[string]interface{}{"apnList": apns}))
}

func (s *Service) queryDataUsage(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	writeOneLink(w, okResp(map[string]interface{}{
		"dataAmount":       fmt.Sprintf("%.2f", card.MonthUsageKB),
		"apnUseAmountList": apnUseAmountList(card),
	}))
}

func (s *Service) queryDataUsageMonthlyBatch(w http.ResponseWriter, r *http.Request, st Store) {
	cards, key, err := findBatchCards(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	items := make([]map[string]interface{}, 0, len(cards))
	for _, card := range cards {
		amount := card.MonthUsageKB
		if q := r.URL.Query().Get("queryDate"); len(q) == 6 && q != time.Now().Format("200601") {
			amount = card.MonthlyBaseKB
		}
		items = append(items, batchUsageItem(card, key, amount))
	}
	writeOneLink(w, okResp(map[string]interface{}{
		"deadLine":       time.Now().AddDate(0, 0, -1).Format("20060102"),
		"dataAmountList": items,
	}))
}

func (s *Service) queryDataUsageDailyBatch(w http.ResponseWriter, r *http.Request, st Store) {
	cards, key, err := findBatchCards(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	items := make([]map[string]interface{}, 0, len(cards))
	for _, card := range cards {
		items = append(items, batchUsageItem(card, key, card.DailyBaseKB))
	}
	writeOneLink(w, okResp(map[string]interface{}{"dataAmountList": items}))
}

func (s *Service) queryAPNInfo(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	apns := make([]map[string]string, 0, len(card.APNs))
	for _, apn := range card.APNs {
		apns = append(apns, map[string]string{"apnName": apn.Name, "status": apn.Status})
	}
	writeOneLink(w, okResp(map[string]interface{}{"apnList": apns}))
}

func (s *Service) queryCardBindStatus(w http.ResponseWriter, r *http.Request, st Store) {
	if r.URL.Query().Get("msisdn") == "" || r.URL.Query().Get("iccid") != "" || r.URL.Query().Get("imsi") != "" {
		writeOneLink(w, paramErr("card-bind-status requires msisdn only"))
		return
	}
	testType := r.URL.Query().Get("testType")
	if testType != "0" && testType != "1" {
		writeOneLink(w, paramErr("testType must be 0 or 1"))
		return
	}
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	result := card.CardBindStatus
	if result != "0" && result != "1" && result != "2" {
		result = "1"
	}
	data := map[string]string{"result": result}
	if result == "2" {
		data["errorCode"] = "MOCK_BIND_CHECK_FAILED"
		data["errorDes"] = "mock bind check failed"
	}
	writeOneLink(w, okResp(data))
}

func (s *Service) queryOnOffStatus(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	writeOneLink(w, okResp(map[string]string{"status": card.OnOffStatus}))
}

func (s *Service) queryRegionLimitStatus(w http.ResponseWriter, r *http.Request, st Store) {
	card, err := findSingleCard(r, st)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	writeOneLink(w, okResp(map[string]string{"regionLimitStatus": card.RegionLimitStatus}))
}

func (s *Service) changeSIMStatus(w http.ResponseWriter, r *http.Request, st Store) {
	q := r.URL.Query()
	idKey, idVal, err := singleIdentifier(q)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	operType := q.Get("operType")
	orderNum := "ORD" + time.Now().Format("20060102150405") + randomHex(3)
	var result map[string]string
	err = s.store.SaveMutation(func(store *Store) error {
		idx := findCardIndex(*store, idKey, idVal)
		if idx < 0 {
			return fmt.Errorf("查询不到信息")
		}
		card := &store.Cards[idx]
		card.CardStatus = statusByOperType(operType, card.CardStatus)
		card.LastChangeDate = time.Now().Format("2006-01-02 15:04:05")
		store.Orders = append(store.Orders, Order{
			OrderNum: orderNum, MSISDN: card.MSISDN, ICCID: card.ICCID, IMSI: card.IMSI,
			Type: "sim-status", OperType: operType, Status: "completed", CreatedAt: card.LastChangeDate,
		})
		result = map[string]string{idKey: idVal, "orderNum": orderNum}
		return nil
	})
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	writeOneLink(w, okResp(result))
}

func (s *Service) operateSIMAPNFunction(w http.ResponseWriter, r *http.Request, st Store) {
	q := r.URL.Query()
	idKey, idVal, err := singleIdentifier(q)
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	apnName := q.Get("apnName")
	operType := q.Get("operType")
	if apnName == "" || (operType != "0" && operType != "1") {
		writeOneLink(w, paramErr("apnName 与 operType 必填"))
		return
	}
	orderNum := "APN" + time.Now().Format("20060102150405") + randomHex(3)
	var result map[string]string
	err = s.store.SaveMutation(func(store *Store) error {
		idx := findCardIndex(*store, idKey, idVal)
		if idx < 0 {
			return fmt.Errorf("查询不到信息")
		}
		card := &store.Cards[idx]
		status := "0"
		if operType == "0" {
			status = "1"
		}
		found := false
		for i := range card.APNs {
			if strings.EqualFold(card.APNs[i].Name, apnName) {
				card.APNs[i].Status = status
				found = true
			}
		}
		if !found {
			card.APNs = append(card.APNs, APN{Name: apnName, Status: status})
		}
		now := time.Now().Format("2006-01-02 15:04:05")
		store.Orders = append(store.Orders, Order{
			OrderNum: orderNum, MSISDN: card.MSISDN, ICCID: card.ICCID, IMSI: card.IMSI,
			Type: "sim-apn-function", OperType: operType, APNName: apnName, Status: "completed", CreatedAt: now,
		})
		result = map[string]string{idKey: idVal, "orderNum": orderNum}
		return nil
	})
	if err != nil {
		writeOneLink(w, paramErr(err.Error()))
		return
	}
	writeOneLink(w, okResp(result))
}

func okResp(item interface{}) Response {
	return Response{Status: "0", Message: "正确", Result: []interface{}{item}}
}

func paramErr(message string) Response {
	if strings.Contains(message, "查询不到") {
		return Response{Status: "14008", Message: "查询不到信息", Result: []interface{}{}}
	}
	return Response{Status: "12001", Message: message, Result: []interface{}{}}
}

func writeOneLink(w http.ResponseWriter, resp Response) {
	writeJSON(w, http.StatusOK, resp)
}

func writeJSON(w http.ResponseWriter, code int, v interface{}) {
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.WriteHeader(code)
	_ = json.NewEncoder(w).Encode(v)
}

func singleIdentifier(q mapLike) (string, string, error) {
	found := [][2]string{}
	for _, key := range []string{"msisdn", "iccid", "imsi"} {
		if v := q.Get(key); v != "" {
			found = append(found, [2]string{key, v})
		}
	}
	if len(found) != 1 {
		return "", "", fmt.Errorf("msisdn、iccid、imsi 必须有且只有一项")
	}
	return found[0][0], found[0][1], nil
}

type mapLike interface {
	Get(string) string
}

func findSingleCard(r *http.Request, st Store) (SIMCard, error) {
	key, value, err := singleIdentifier(r.URL.Query())
	if err != nil {
		return SIMCard{}, err
	}
	for _, card := range st.Cards {
		if matches(card, key, value) {
			return card, nil
		}
	}
	return SIMCard{}, fmt.Errorf("查询不到信息")
}

func findBatchCards(r *http.Request, st Store) ([]SIMCard, string, error) {
	q := r.URL.Query()
	keys := []string{"msisdns", "iccids", "imsis"}
	foundKey := ""
	foundValue := ""
	for _, key := range keys {
		if v := q.Get(key); v != "" {
			if foundKey != "" {
				return nil, "", fmt.Errorf("msisdns、iccids、imsis 必须有且只有一项")
			}
			foundKey = key
			foundValue = v
		}
	}
	if foundKey == "" {
		return nil, "", fmt.Errorf("msisdns、iccids、imsis 必须有且只有一项")
	}
	singular := strings.TrimSuffix(foundKey, "s")
	ids := strings.Split(foundValue, "_")
	var cards []SIMCard
	for _, id := range ids {
		id = strings.TrimSpace(id)
		for _, card := range st.Cards {
			if matches(card, singular, id) {
				cards = append(cards, card)
				break
			}
		}
	}
	if len(cards) == 0 {
		return nil, "", fmt.Errorf("查询不到信息")
	}
	return cards, singular, nil
}

func findCardIndex(st Store, key, value string) int {
	for i, card := range st.Cards {
		if matches(card, key, value) {
			return i
		}
	}
	return -1
}

func matches(card SIMCard, key, value string) bool {
	switch key {
	case "msisdn":
		return card.MSISDN == value
	case "iccid":
		return card.ICCID == value
	case "imsi":
		return card.IMSI == value
	}
	return false
}

func apnUseAmountList(card SIMCard) []map[string]interface{} {
	out := make([]map[string]interface{}, 0, len(card.APNs))
	for _, apn := range card.APNs {
		out = append(out, map[string]interface{}{
			"apnName":      apn.Name,
			"apnUseAmount": fmtAmount(apn.UsageBytes / 1024),
			"pccCodeUseAmountList": []map[string]string{{
				"pccCode":          "default",
				"pccCodeUseAmount": fmtAmount(apn.UsageBytes / 1024),
			}},
		})
	}
	return out
}

func batchUsageItem(card SIMCard, key string, amount float64) map[string]interface{} {
	item := map[string]interface{}{
		key:          identifierValue(card, key),
		"dataAmount": fmtAmount(amount),
	}
	if amount > 0 {
		item["apnDataAmountList"] = []map[string]string{
			{"apnName": "CMIOT", "apnDataAmount": fmtAmount(amount * 0.7)},
			{"apnName": "CMMTM", "apnDataAmount": fmtAmount(amount * 0.3)},
		}
	}
	return item
}

func identifierValue(card SIMCard, key string) string {
	switch key {
	case "iccid":
		return card.ICCID
	case "imsi":
		return card.IMSI
	default:
		return card.MSISDN
	}
}

func fmtAmount(v float64) string {
	if math.Abs(v-math.Round(v)) < 0.001 {
		return strconv.FormatInt(int64(math.Round(v)), 10)
	}
	return fmt.Sprintf("%.2f", v)
}

func statusByOperType(operType, current string) string {
	switch operType {
	case "0":
		return "4"
	case "1", "2", "5", "6":
		return "2"
	case "3", "8":
		return "7"
	case "4", "9":
		return "1"
	default:
		return current
	}
}