package captcha

import (
	"fmt"
	"git.diulo.com/mogfee/protoc-gen-kit/pkg/base64Captcha"
	"github.com/go-redis/redis"
	"time"
)

var DefaultConfig = base64Captcha.DriverString{
	Height:          80,
	Width:           240,
	NoiseCount:      20,
	ShowLineOptions: 100,
	Length:          5,
	BgColor:         nil,
	Source:          "1234567890qwertyuioplkjhgfdsazxcvbnm",
	Fonts:           []string{"wqy-microhei.ttc", "chromohv.ttf", "actionj.ttf", "RitaSmith.ttf"},
}

func Generate(store base64Captcha.Store) (id, b64s string, err error) {
	return base64Captcha.NewCaptcha(&DefaultConfig, store).Generate()
}

type redisStore struct {
	redis *redis.Client
}

func NewRedisStore(redis *redis.Client) *redisStore {
	return &redisStore{
		redis: redis,
	}
}

func (r *redisStore) Key(key string) string {
	return fmt.Sprintf("captach::%s", key)
}
func (r *redisStore) Set(id string, value string) error {
	return r.redis.Set(r.Key(id), value, time.Second*3700).Err()
}

func (r *redisStore) Get(id string, clear bool) string {
	val, err := r.redis.Get(r.Key(id)).Result()
	if err != nil {
		return ""
	}
	if clear {
		r.redis.Del(r.Key(id))
	}
	return val
}

func (r *redisStore) Verify(id, answer string, clear bool) bool {
	val := r.Get(id, clear)
	if answer == "" {
		return false
	}
	return val == answer
}