package temporary

import (
	"context"
	"errors"
	"fmt"
	"git.ttmylife.com/zeuszhao/kit/buildin"
	"git.ttmylife.com/zeuszhao/kit/cache"
	"time"
)

var ErrorCode = errors.New("验证码错误")

type VerificationCode struct {
	c   cache.Cache
	key string
}

func NewVerificationCode(c cache.Cache, target string) *VerificationCode {
	return &VerificationCode{
		c:   c,
		key: target,
	}
}

func (t *VerificationCode) makeKey(target string) string {
	return fmt.Sprintf("temporary:auth:code:%s", target)
}

func (t *VerificationCode) Make(ctx context.Context, bit uint8, ti time.Duration) (string, error) {
	randStr := buildin.RandNumberString(bit)
	k := t.makeKey(t.key)
	_, err := t.c.Set(ctx, k, randStr, ti)
	if err != nil {
		return "", err
	}
	return randStr, nil
}

func (t *VerificationCode) Verify(ctx context.Context, code string) (bool, error) {
	k := t.makeKey(t.key)
	vv, err := t.c.Get(ctx, k)
	if err != nil {
		return false, ErrorCode
	}

	if vv == code {
		return true, nil
	}

	return false, nil
}

func (t *VerificationCode) Destroy(ctx context.Context) {
	k := t.makeKey(t.key)
	t.c.Delete(ctx, k)
}