package captcha

import (
	"errors"
	"time"

	"github.com/runningwater/gohub/pkg/app"
	"github.com/runningwater/gohub/pkg/config"
	"github.com/runningwater/gohub/pkg/redis"
)

// RedisStore is a store for captcha using Redis.
// It implements the Save interface. base64Captcha.Store interface.
type RedisStore struct {
	RedisClient *redis.Client
	KeyPrefix   string
}

// Set 实现 base64Captcha.Save.Set 方法
func (s *RedisStore) Set(key string, value string) error {
	expiretime := time.Minute * time.Duration(config.GetInt64("captcha.expire_time"))
	// 方便本地开发调试
	if app.IsLocal() {
		expiretime = time.Minute * time.Duration(config.GetInt64("captcha.debug_expire_time"))
	}
	if ok := s.RedisClient.Set(s.KeyPrefix+key, value, expiretime); !ok {
		return errors.New("无法存储图片验证码")
	}

	return nil
}

// Get 实现 base64Captcha.Save.Get 方法
func (s *RedisStore) Get(key string, clear bool) string {
	key = s.KeyPrefix + key
	val := s.RedisClient.Get(key)
	if clear {
		s.RedisClient.Del(key)
	}
	return val
}

// Verify 实现 base64Captcha.Save.Verify 方法
func (s *RedisStore) Verify(key, answer string, clear bool) bool {
	v := s.Get(key, clear)
	return v == answer
}