package captcha

import (
	"fmt"
	"git.bvbej.com/bvbej/base-golang/pkg/cache"
	"github.com/mojocn/base64Captcha"
	"go.uber.org/zap"
	"time"
)

const RedisKeyPrefixCaptcha = "captcha:base64:"

var _ base64Captcha.Store = (*store)(nil)

type store struct {
	cache  cache.Repo
	ttl    time.Duration
	logger *zap.Logger
}

func (s *store) Set(id string, value string) error {
	err := s.cache.Set(RedisKeyPrefixCaptcha+id, value, s.ttl)
	if err != nil {
		s.logger.Error(fmt.Sprintf("hu缓存Captcha信息错误[%s]", err))
		return err
	}
	return nil
}

func (s *store) Get(id string, clear bool) string {
	value, err := s.cache.Get(RedisKeyPrefixCaptcha + id)
	if err != nil {
		s.logger.Error(fmt.Sprintf("获取Captcha信息错误[%s]", err))
	}
	return value
}

func (s *store) Verify(id, answer string, clear bool) bool {
	return s.Get(id, clear) == answer
}

func NewStore(cache cache.Repo, ttl time.Duration, logger *zap.Logger) base64Captcha.Store {
	return &store{
		cache:  cache,
		ttl:    ttl,
		logger: logger,
	}
}

var _ Captcha = (*captcha)(nil)

type Captcha interface {
	Generate() (id, b64s string, err error)
	Verify(id, value string) bool
}

type captcha struct {
	conf  *base64Captcha.DriverString
	store base64Captcha.Store
}

func NewCaptcha(store base64Captcha.Store, height, width, length int) Captcha {
	conf := &base64Captcha.DriverString{
		Height: height,
		Width:  width,
		Length: length,
	}
	return &captcha{
		conf:  conf,
		store: store,
	}
}

func (c *captcha) Generate() (id, b64s string, err error) {
	driver := base64Captcha.DriverString.ConvertFonts(c.conf)
	newCaptcha := base64Captcha.NewCaptcha(driver, c.store)
	return newCaptcha.Generate()
}

func (c *captcha) Verify(id, value string) bool {
	return c.store.Verify(id, value, true)
}