package chat

import (
	"context"
	"regexp"
	"strconv"
	"strings"

	"git.imall.cloud/openim/chat/pkg/common/db/dbutil"
	table "git.imall.cloud/openim/chat/pkg/common/db/table/chat"
	"git.imall.cloud/openim/chat/pkg/eerrs"
	"git.imall.cloud/openim/chat/pkg/protocol/chat"
	"git.imall.cloud/openim/chat/pkg/protocol/common"
	"github.com/openimsdk/tools/errs"
	"github.com/openimsdk/tools/utils/datautil"
	"github.com/openimsdk/tools/utils/stringutil"
)

func DbToPbAttribute(attribute *table.Attribute) *common.UserPublicInfo {
	if attribute == nil {
		return nil
	}
	return &common.UserPublicInfo{
		UserID:   attribute.UserID,
		Account:  attribute.Account,
		Email:    attribute.Email,
		Nickname: attribute.Nickname,
		FaceURL:  attribute.FaceURL,
		Gender:   attribute.Gender,
		Level:    attribute.Level,
		UserType: attribute.UserType,
	}
}

func DbToPbAttributes(attributes []*table.Attribute) []*common.UserPublicInfo {
	return datautil.Slice(attributes, DbToPbAttribute)
}

func DbToPbUserFullInfo(attribute *table.Attribute) *common.UserFullInfo {
	return &common.UserFullInfo{
		UserID:           attribute.UserID,
		Password:         "",
		Account:          attribute.Account,
		PhoneNumber:      attribute.PhoneNumber,
		AreaCode:         attribute.AreaCode,
		Email:            attribute.Email,
		Nickname:         attribute.Nickname,
		FaceURL:          attribute.FaceURL,
		Gender:           attribute.Gender,
		Level:            attribute.Level,
		UserType:         attribute.UserType,
		Birth:            attribute.BirthTime.UnixMilli(),
		AllowAddFriend:   attribute.AllowAddFriend,
		AllowBeep:        attribute.AllowBeep,
		AllowVibration:   attribute.AllowVibration,
		GlobalRecvMsgOpt: attribute.GlobalRecvMsgOpt,
		RegisterType:     attribute.RegisterType,
		UserFlag:         attribute.UserFlag,
		CreateTime:       attribute.CreateTime.UnixMilli(),
		Ip:               "", // 默认空字符串
	}
}

func DbToPbUserFullInfos(attributes []*table.Attribute) []*common.UserFullInfo {
	return datautil.Slice(attributes, DbToPbUserFullInfo)
}

func DbToPbUserFullInfoWithIP(attribute *table.Attribute, ip string) *common.UserFullInfo {
	return &common.UserFullInfo{
		UserID:           attribute.UserID,
		Password:         "",
		Account:          attribute.Account,
		PhoneNumber:      attribute.PhoneNumber,
		AreaCode:         attribute.AreaCode,
		Email:            attribute.Email,
		Nickname:         attribute.Nickname,
		FaceURL:          attribute.FaceURL,
		Gender:           attribute.Gender,
		Level:            attribute.Level,
		UserType:         attribute.UserType,
		Birth:            attribute.BirthTime.UnixMilli(),
		AllowAddFriend:   attribute.AllowAddFriend,
		AllowBeep:        attribute.AllowBeep,
		AllowVibration:   attribute.AllowVibration,
		GlobalRecvMsgOpt: attribute.GlobalRecvMsgOpt,
		RegisterType:     attribute.RegisterType,
		UserFlag:         attribute.UserFlag,
		CreateTime:       attribute.CreateTime.UnixMilli(),
		Ip:               ip,
	}
}

func DbToPbUserFullInfosWithIP(attributes []*table.Attribute, userIPMap map[string]string) []*common.UserFullInfo {
	result := make([]*common.UserFullInfo, 0, len(attributes))
	for _, attr := range attributes {
		ip := userIPMap[attr.UserID]
		result = append(result, DbToPbUserFullInfoWithIP(attr, ip))
	}
	return result
}

// DbToPbUserFullInfosWithRealNameAuth 转换用户信息（包含实名认证信息）
func DbToPbUserFullInfosWithRealNameAuth(attributes []*table.Attribute, walletMap map[string]*table.Wallet) []*common.UserFullInfo {
	result := make([]*common.UserFullInfo, 0, len(attributes))
	for _, attr := range attributes {
		userInfo := DbToPbUserFullInfo(attr)
		// 填充实名认证信息
		if wallet, ok := walletMap[attr.UserID]; ok {
			userInfo.IdCard = wallet.RealNameAuth.IDCard
			userInfo.RealName = wallet.RealNameAuth.Name
			userInfo.IdCardPhotoFront = wallet.RealNameAuth.IDCardPhotoFront
			userInfo.IdCardPhotoBack = wallet.RealNameAuth.IDCardPhotoBack
			userInfo.AuditStatus = wallet.RealNameAuth.AuditStatus
		}
		result = append(result, userInfo)
	}
	return result
}

// DbToPbUserFullInfosWithRealNameAuthAndIP 转换用户信息（包含实名认证信息和IP）
func DbToPbUserFullInfosWithRealNameAuthAndIP(attributes []*table.Attribute, walletMap map[string]*table.Wallet, userIPMap map[string]string) []*common.UserFullInfo {
	result := make([]*common.UserFullInfo, 0, len(attributes))
	for _, attr := range attributes {
		ip := userIPMap[attr.UserID]
		userInfo := DbToPbUserFullInfoWithIP(attr, ip)
		// 填充实名认证信息
		if wallet, ok := walletMap[attr.UserID]; ok {
			userInfo.IdCard = wallet.RealNameAuth.IDCard
			userInfo.RealName = wallet.RealNameAuth.Name
			userInfo.IdCardPhotoFront = wallet.RealNameAuth.IDCardPhotoFront
			userInfo.IdCardPhotoBack = wallet.RealNameAuth.IDCardPhotoBack
			userInfo.AuditStatus = wallet.RealNameAuth.AuditStatus
		}
		result = append(result, userInfo)
	}
	return result
}

func BuildCredentialPhone(areaCode, phone string) string {
	return areaCode + " " + phone
}

func (o *chatSvr) checkRegisterInfo(ctx context.Context, user *chat.RegisterUserInfo, isAdmin bool) error {
	if user == nil {
		return errs.ErrArgs.WrapMsg("user is nil")
	}
	user.Account = strings.TrimSpace(user.Account)
	// 如果提供了account，则不需要验证phone和email
	if user.Account != "" {
		// account验证逻辑在后面，这里直接跳过"至少需要一个账号"的检查
	} else if user.Email == "" && !(user.PhoneNumber != "" && user.AreaCode != "") && !isAdmin {
		// 如果没有account，也没有email，也没有完整的phone（phoneNumber和areaCode都提供），且不是管理员，则报错
		return errs.ErrArgs.WrapMsg("at least one valid account is required")
	}
	if user.PhoneNumber != "" {
		if !strings.HasPrefix(user.AreaCode, "+") {
			user.AreaCode = "+" + user.AreaCode
		}
		if _, err := strconv.ParseUint(user.AreaCode[1:], 10, 64); err != nil {
			return errs.ErrArgs.WrapMsg("area code must be number")
		}
		if _, err := strconv.ParseUint(user.PhoneNumber, 10, 64); err != nil {
			return errs.ErrArgs.WrapMsg("phone number must be number")
		}
		_, err := o.Database.TakeAttributeByPhone(ctx, user.AreaCode, user.PhoneNumber)
		if err == nil {
			return eerrs.ErrPhoneAlreadyRegister.Wrap()
		} else if !dbutil.IsDBNotFound(err) {
			return err
		}
	}
	if user.Account != "" {
		// 验证长度：6到20位
		if len(user.Account) < 6 || len(user.Account) > 20 {
			return errs.ErrArgs.WrapMsg("account must be between 6 and 20 characters")
		}
		// 验证格式：只能包含数字、字母、下划线(_)、横线(-)
		pattern := `^[a-zA-Z0-9_-]+$`
		matched, err := regexp.MatchString(pattern, user.Account)
		if err != nil || !matched {
			return errs.ErrArgs.WrapMsg("account must contain only letters, numbers, underscores, and hyphens")
		}
		_, err = o.Database.TakeAttributeByAccount(ctx, user.Account)
		if err == nil {
			return eerrs.ErrAccountAlreadyRegister.Wrap()
		} else if !dbutil.IsDBNotFound(err) {
			return err
		}
	}
	if user.Email != "" {
		if !stringutil.IsValidEmail(user.Email) {
			return errs.ErrArgs.WrapMsg("invalid email")
		}
		_, err := o.Database.TakeAttributeByAccount(ctx, user.Email)
		if err == nil {
			return eerrs.ErrEmailAlreadyRegister.Wrap()
		} else if !dbutil.IsDBNotFound(err) {
			return err
		}
	}
	return nil
}