package sms

import (
	"context"
	"fmt"
	"github.com/go-kratos/kratos/v2/log"
	"matchmaking-system/internal/pkg/flags"
	"math/rand"
	"time"
)

// ALiYunCase
// @Description:
type ALiYunCase struct {
	aly ALiYunRepo

	log *log.Helper
}

// ALiYunRepo
// @Description:
type ALiYunRepo interface {
	SendVerificationCode(ctx context.Context, phoneNumber string) (string, error)
	CheckVerificationCode(ctx context.Context, phoneNumber, verificationCode string) error
	CheckVerificationCodeNew(ctx context.Context, phoneNumber string) (string, error)
}

// NewMsgSend
//
//	@Description:
//	@param ur
//	@param logger
//	@return *ALiYunCase
func NewMsgSend(ur ALiYunRepo, logger log.Logger) *ALiYunCase {
	return &ALiYunCase{aly: ur, log: log.NewHelper(logger)}
}

// RunSendSms
//
//	@Description:
//	@receiver al
//	@param ctx
//	@param phoneNumber
//	@return string
//	@return error
func (al *ALiYunCase) RunSendSms(ctx context.Context, phoneNumber string) (string, error) {
	code, err := al.aly.CheckVerificationCodeNew(ctx, phoneNumber)
	if err != nil {
		return err.Error(), err
	}

	if len(code) > 0 {
		return code, err
	}

	// Request verification code
	codeMsg, err := al.aly.SendVerificationCode(ctx, phoneNumber)
	if err != nil {
		return flags.SetNull, err
	}

	return codeMsg, nil
}

// CreateRandCode
//
//	@Description: 创建6位随机数
//	@param ctx
//	@return string
func CreateRandCode(ctx context.Context) string {
	return fmt.Sprintf("%06v", rand.New(rand.NewSource(time.Now().UnixNano())).Int31n(1000000))
}

// CreateRandCodeFrom
//
//	@Description: 创建一个10位随机数作为发送方
//	@param ctx
//	@param n
//	@return string
func CreateRandCodeFrom(ctx context.Context, n int) string {
	code := flags.SetNull
	for i := 0; i < n; i++ {
		code = fmt.Sprintf("%s%d", code, rand.Intn(10))
	}
	return code
}