package member

import (
	"biz-member-gateway/internal/domain"
	bizDomain "biz-member-gateway/internal/domain"
	"biz-member-gateway/internal/svc"
	"biz-member-gateway/internal/types"
	"context"
	"regexp"
	"strings"
	"time"

	"code.30cm.net/digimon/app-cloudep-member-server/pkg/domain/member"
	memberUC "code.30cm.net/digimon/app-cloudep-member-server/pkg/domain/usecase"
	"code.30cm.net/digimon/library-go/errs"
	memberProto "code.30cm.net/digimon/proto-all/pkg/member"
	permissionProto "code.30cm.net/digimon/proto-all/pkg/permission"
	"github.com/golang/protobuf/proto"
	"github.com/zeromicro/go-zero/core/logx"
)

type LoginLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

// NewLoginLogic 登入
func NewLoginLogic(ctx context.Context, svcCtx *svc.ServiceContext) *LoginLogic {
	return &LoginLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *LoginLogic) Login(req *types.LoginReq) (resp *types.LoginTokenResp, err error) {
	var result memberUC.VerifyAuthResultResponse
	// Step 1 驗證進來的 Token
	platform := member.GetPlatformByPlatformCode(req.Platform)

	switch platform {
	case member.Digimon:
		switch member.GetAccountTypeByCode(req.AccountType) {
		case member.AccountTypePhone:
			phone, isPhone := normalizeTaiwanMobile(req.Account)
			if !isPhone {
				return nil, errs.InvalidFormat("phone number is invalid")
			}
			req.Account = phone
		case member.AccountTypeMail:
			if !isValidEmail(req.Account) {
				return nil, errs.InvalidFormat("email is invalid")
			}
		}

		// 原始平台驗證
		res, err := l.svcCtx.MemberRPC.VerifyPlatformAuthResult(l.ctx, &memberProto.VerifyAuthResultReq{
			Account: proto.String(req.Account),
			Token:   req.Token,
		})
		if err != nil {
			return nil, err
		}
		result.Status = res.Status
	case member.Google:
		// 原始平台驗證
		_, err := l.svcCtx.MemberRPC.VerifyGoogleAuthResult(l.ctx, &memberProto.VerifyAuthResultReq{
			Account: proto.String(req.Account),
			Token:   req.Token,
		})

		if err != nil {
			return nil, err
		}
		result.Status = true
	case member.Line:
		// 原始平台驗證
		accessToken, err := l.svcCtx.MemberRPC.LineCodeToAccessToken(l.ctx, &memberProto.LineGetTokenReq{
			Code: req.Account,
		})
		if err != nil {
			return nil, err
		}

		// 換資料
		userInfo, err := l.svcCtx.MemberRPC.LineGetProfileByAccessToken(l.ctx, &memberProto.LineGetUserInfoReq{
			Token: accessToken.Token,
		})
		if err != nil {
			return nil, err
		}

		result.Status = true
		req.Account = userInfo.UserId
	case member.PlatformNone:
	default:
		return nil, errs.InvalidFormat("invalid platform")
	}

	if !result.Status {
		return nil, errs.Unauthorized("failed to validate password ")
	}

	account, err := l.svcCtx.MemberRPC.GetUIDByAccount(l.ctx, &memberProto.GetUIDByAccountReq{
		Account: req.Account,
	})
	if err != nil {
		return nil, err
	}

	credentials := "client_credentials"
	// TODO 去拿這個使用者Role
	role := bizDomain.DefaultRole

	t, err := l.svcCtx.TokenRPC.NewToken(l.ctx, &permissionProto.AuthorizationReq{
		GrantType:      credentials,
		DeviceId:       req.DeviceID,
		Scope:          role,
		IsRefreshToken: true,
		Account:        req.Account,
		Uid:            account.GetUid(),
		Expires:        proto.Int64(time.Now().UTC().Add(l.svcCtx.Config.Token.Expired).UnixNano()),        // 指定到期的時間
		RefreshExpire:  proto.Int64(time.Now().UTC().Add(l.svcCtx.Config.Token.RefreshExpired).UnixNano()), // 指定到期的時間
		Data:           map[string]string{},
		Role:           role,
	})
	if err != nil {
		return nil, err
	}

	return &types.LoginTokenResp{
		UID:          account.GetUid(),
		AccessToken:  t.AccessToken,
		RefreshToken: t.RefreshToken,
		TokenType:    domain.TokenTypeBearer,
	}, nil
}

// 標準化號碼並驗證是否為合法台灣手機號碼
func normalizeTaiwanMobile(phone string) (string, bool) {
	// 移除空格
	phone = strings.ReplaceAll(phone, " ", "")

	// 移除 "+886" 並將剩餘部分標準化
	if strings.HasPrefix(phone, "+886") {
		phone = strings.TrimPrefix(phone, "+886")
		if !strings.HasPrefix(phone, "0") {
			phone = "0" + phone
		}
	}

	// 正則表達式驗證標準化後的號碼
	regex := regexp.MustCompile(`^(09\d{8})$`)
	if regex.MatchString(phone) {
		return phone, true
	}

	return "", false
}

// 驗證 Email 格式的函數
func isValidEmail(email string) bool {
	// 定義正則表達式
	regex := regexp.MustCompile(`^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$`)

	return regex.MatchString(email)
}