package service

import (
	"context"
	"database/sql"
	"encoding/json"
	"regexp"
	"strings"

	"ycc-server/app/main/api/internal/config"
	tianyuanapi "ycc-server/app/main/api/internal/service/tianyuanapi_sdk"
	"ycc-server/app/main/model"
	"ycc-server/common/ctxdata"
	"ycc-server/common/xerr"

	"github.com/pkg/errors"
	"github.com/zeromicro/go-zero/core/logx"
)

var queryWhitelistIdCardPattern = regexp.MustCompile(`^\d{17}[\dXx]$`)

const (
	tianyuanQueryWhitelistSuccessCode  = 0
	tianyuanQueryWhitelistExistsCode   = 1013
	tianyuanQueryWhitelistNotFoundCode = 1014
	tianyuanQueryWhitelistLocalFailCode = -1
)

// QueryWhitelistSyncService 天远查询白名单同步服务
type QueryWhitelistSyncService struct {
	config     config.Config
	client     *tianyuanapi.Client
	opLogModel model.QueryWhitelistOpLogModel
}

func NewQueryWhitelistSyncService(
	c config.Config,
	client *tianyuanapi.Client,
	opLogModel model.QueryWhitelistOpLogModel,
) *QueryWhitelistSyncService {
	return &QueryWhitelistSyncService{
		config:     c,
		client:     client,
		opLogModel: opLogModel,
	}
}

// TrySync 尽力同步天远查询白名单，失败仅记操作日志，不影响主流程
func (s *QueryWhitelistSyncService) TrySync(
	ctx context.Context,
	name, idCard string,
	apiCodes []string,
	remark string,
) {
	if err := s.Sync(ctx, name, idCard, apiCodes, remark); err != nil {
		logx.WithContext(ctx).Errorf("天远查询白名单同步失败（不影响主流程）: %v", err)
	}
}

// TrySyncWhitelistOrder 尽力同步白名单订单中的模块到天远
func (s *QueryWhitelistSyncService) TrySyncWhitelistOrder(
	ctx context.Context,
	whitelistOrder *model.WhitelistOrder,
	items []*model.WhitelistOrderItem,
	remark string,
) {
	if whitelistOrder == nil || len(items) == 0 {
		return
	}
	s.TrySync(ctx, "*", whitelistOrder.IdCard, collectWhitelistOrderApiCodes(items), remark)
}

// Sync 将产品编码同步到天远查询白名单（先追加，规则不存在则创建）
func (s *QueryWhitelistSyncService) Sync(
	ctx context.Context,
	name, idCard string,
	apiCodes []string,
	remark string,
) error {
	if err := validateQueryWhitelistSyncReq(idCard, apiCodes); err != nil {
		s.recordOpLogFailure(ctx, "sync", name, idCard, apiCodes, remark, err.Error(), tianyuanQueryWhitelistLocalFailCode)
		return err
	}

	appendResp, err := s.callMgmt(
		"/api/v1/query-whitelist/entries/append",
		name,
		idCard,
		apiCodes,
		remark,
	)
	if err != nil {
		s.recordOpLogFailure(ctx, "append", name, idCard, apiCodes, remark, err.Error(), tianyuanQueryWhitelistLocalFailCode)
		return err
	}
	if isTianyuanQueryWhitelistSuccess(appendResp.Code) {
		s.recordOpLog(ctx, "append", name, idCard, apiCodes, remark, appendResp)
		return nil
	}
	if appendResp.Code != tianyuanQueryWhitelistNotFoundCode {
		s.recordOpLog(ctx, "append", name, idCard, apiCodes, remark, appendResp)
		return errors.Wrapf(xerr.NewErrMsg(appendResp.Message), "天远查询白名单同步失败(code=%d)", appendResp.Code)
	}

	createResp, err := s.callMgmt(
		"/api/v1/query-whitelist/entries",
		name,
		idCard,
		apiCodes,
		remark,
	)
	if err != nil {
		s.recordOpLogFailure(ctx, "create", name, idCard, apiCodes, remark, err.Error(), tianyuanQueryWhitelistLocalFailCode)
		return err
	}
	if isTianyuanQueryWhitelistSuccess(createResp.Code) {
		s.recordOpLog(ctx, "create", name, idCard, apiCodes, remark, createResp)
		return nil
	}
	if createResp.Code == tianyuanQueryWhitelistExistsCode {
		retryResp, retryErr := s.callMgmt(
			"/api/v1/query-whitelist/entries/append",
			name,
			idCard,
			apiCodes,
			remark,
		)
		if retryErr != nil {
			s.recordOpLogFailure(ctx, "append", name, idCard, apiCodes, remark, retryErr.Error(), tianyuanQueryWhitelistLocalFailCode)
			return retryErr
		}
		s.recordOpLog(ctx, "append", name, idCard, apiCodes, remark, retryResp)
		if isTianyuanQueryWhitelistSuccess(retryResp.Code) {
			return nil
		}
		return errors.Wrapf(xerr.NewErrMsg(retryResp.Message), "天远查询白名单同步失败(code=%d)", retryResp.Code)
	}

	s.recordOpLog(ctx, "create", name, idCard, apiCodes, remark, createResp)
	return errors.Wrapf(xerr.NewErrMsg(createResp.Message), "天远查询白名单同步失败(code=%d)", createResp.Code)
}

func collectWhitelistOrderApiCodes(items []*model.WhitelistOrderItem) []string {
	codes := make([]string, 0, len(items))
	seen := make(map[string]bool, len(items))
	for _, item := range items {
		if item == nil || item.FeatureApiId == "" || seen[item.FeatureApiId] {
			continue
		}
		seen[item.FeatureApiId] = true
		codes = append(codes, item.FeatureApiId)
	}
	return codes
}

func validateQueryWhitelistSyncReq(idCard string, apiCodes []string) error {
	if strings.TrimSpace(idCard) == "" {
		return errors.Wrapf(xerr.NewErrMsg("身份证号不能为空"), "")
	}
	if !queryWhitelistIdCardPattern.MatchString(strings.TrimSpace(idCard)) {
		return errors.Wrapf(xerr.NewErrMsg("身份证号格式不正确，需为18位中国大陆身份证号"), "")
	}
	if len(apiCodes) == 0 {
		return errors.Wrapf(xerr.NewErrMsg("请至少选择一个产品编码"), "")
	}
	for _, code := range apiCodes {
		if strings.TrimSpace(code) == "" {
			return errors.Wrapf(xerr.NewErrMsg("产品编码不能为空"), "")
		}
		if code == "*" {
			return errors.Wrapf(xerr.NewErrMsg("产品编码不支持通配符 *"), "")
		}
	}
	return nil
}

func (s *QueryWhitelistSyncService) callMgmt(
	apiPath string,
	name, idCard string,
	apiCodes []string,
	remark string,
) (*tianyuanapi.QueryWhitelistMgmtResponse, error) {
	mgmtKey := s.config.Tianyuanapi.WhitelistMgmtKey
	if mgmtKey == "" {
		return nil, errors.Wrapf(xerr.NewErrMsg("查询白名单管理密钥未配置，请在服务端配置 Tianyuanapi.WhitelistMgmtKey"), "")
	}
	if s.client == nil {
		return nil, errors.Wrapf(xerr.NewErrMsg("天远 API 客户端未初始化"), "")
	}

	if strings.TrimSpace(name) == "" {
		name = "*"
	}

	payload := map[string]interface{}{
		"name":      name,
		"id_card":   strings.TrimSpace(idCard),
		"api_codes": apiCodes,
	}
	if strings.TrimSpace(remark) != "" {
		payload["remark"] = strings.TrimSpace(remark)
	}

	return s.client.CallQueryWhitelistMgmt(apiPath, payload, mgmtKey)
}

func (s *QueryWhitelistSyncService) recordOpLogFailure(
	ctx context.Context,
	action, name, idCard string,
	apiCodes []string,
	remark, message string,
	code int64,
) {
	s.insertOpLog(ctx, action, name, idCard, apiCodes, remark, code, message, "", nil)
}

func (s *QueryWhitelistSyncService) recordOpLog(
	ctx context.Context,
	action, name, idCard string,
	apiCodes []string,
	remark string,
	apiResp *tianyuanapi.QueryWhitelistMgmtResponse,
) {
	if apiResp == nil {
		return
	}
	s.insertOpLog(ctx, action, name, idCard, apiCodes, remark, int64(apiResp.Code), apiResp.Message, apiResp.TransactionID, apiResp.Entry)
}

func (s *QueryWhitelistSyncService) insertOpLog(
	ctx context.Context,
	action, name, idCard string,
	apiCodes []string,
	remark string,
	tianyuanCode int64,
	tianyuanMessage, transactionID string,
	entry *tianyuanapi.QueryWhitelistEntry,
) {
	if s.opLogModel == nil {
		return
	}

	operatorUserId, err := ctxdata.GetUidFromCtx(ctx)
	if err != nil {
		logx.WithContext(ctx).Errorf("记录查询白名单操作日志失败: 获取操作人ID失败, %v", err)
		operatorUserId = ""
	}

	apiCodesJSON, marshalErr := json.Marshal(apiCodes)
	if marshalErr != nil {
		logx.WithContext(ctx).Errorf("记录查询白名单操作日志失败: 序列化 api_codes 失败, %v", marshalErr)
		return
	}

	log := &model.QueryWhitelistOpLog{
		AdminUserId:  operatorUserId,
		Action:       action,
		Name:         resolveQueryWhitelistName(name),
		IdCard:       strings.TrimSpace(idCard),
		ApiCodes:     string(apiCodesJSON),
		TianyuanCode: tianyuanCode,
	}

	if strings.TrimSpace(remark) != "" {
		log.Remark = sql.NullString{String: strings.TrimSpace(remark), Valid: true}
	}
	if tianyuanMessage != "" {
		log.TianyuanMessage = sql.NullString{String: tianyuanMessage, Valid: true}
	}
	if transactionID != "" {
		log.TransactionId = sql.NullString{String: transactionID, Valid: true}
	}
	if entry != nil {
		if entry.IdCardMasked != "" {
			log.IdCardMasked = sql.NullString{String: entry.IdCardMasked, Valid: true}
		}
		if entry.ID != "" {
			log.EntryId = sql.NullString{String: entry.ID, Valid: true}
		}
		if entry.Status != "" {
			log.EntryStatus = sql.NullString{String: entry.Status, Valid: true}
		}
		if len(entry.ApiCodes) > 0 {
			entryCodesJSON, _ := json.Marshal(entry.ApiCodes)
			log.EntryApiCodes = sql.NullString{String: string(entryCodesJSON), Valid: true}
		}
	}

	if _, insertErr := s.opLogModel.Insert(ctx, nil, log); insertErr != nil {
		logx.WithContext(ctx).Errorf("记录查询白名单操作日志失败: %v", insertErr)
	}
}

func resolveQueryWhitelistName(name string) string {
	if strings.TrimSpace(name) == "" {
		return "*"
	}
	return strings.TrimSpace(name)
}

func isTianyuanQueryWhitelistSuccess(code int) bool {
	return code == tianyuanQueryWhitelistSuccessCode
}