package limits

import (
	"fmt"
	"github.com/jmoiron/sqlx"
	"github.com/openziti/edge/rest_management_api_client"
	"github.com/openziti/zrok/controller/emailUi"
	"github.com/openziti/zrok/controller/store"
	"github.com/openziti/zrok/util"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
)

type shareWarningAction struct {
	str  *store.Store
	edge *rest_management_api_client.ZitiEdgeManagement
	cfg  *emailUi.Config
}

func newShareWarningAction(cfg *emailUi.Config, str *store.Store, edge *rest_management_api_client.ZitiEdgeManagement) *shareWarningAction {
	return &shareWarningAction{str, edge, cfg}
}

func (a *shareWarningAction) HandleShare(shr *store.Share, rxBytes, txBytes int64, limit *BandwidthPerPeriod, trx *sqlx.Tx) error {
	logrus.Infof("warning '%v'", shr.Token)

	env, err := a.str.GetEnvironment(shr.EnvironmentId, trx)
	if err != nil {
		return err
	}

	if env.AccountId != nil {
		acct, err := a.str.GetAccount(*env.AccountId, trx)
		if err != nil {
			return err
		}

		rxLimit := "unlimited bytes"
		if limit.Limit.Rx != Unlimited {
			rxLimit = util.BytesToSize(limit.Limit.Rx)
		}
		txLimit := "unlimited bytes"
		if limit.Limit.Tx != Unlimited {
			txLimit = util.BytesToSize(limit.Limit.Tx)
		}
		totalLimit := "unlimited bytes"
		if limit.Limit.Total != Unlimited {
			totalLimit = util.BytesToSize(limit.Limit.Total)
		}
		detail := fmt.Sprintf("Your share '%v' has received %v and sent %v (for a total of %v), which has triggered a transfer limit warning.", shr.Token, util.BytesToSize(rxBytes), util.BytesToSize(txBytes), util.BytesToSize(rxBytes+txBytes)) +
			fmt.Sprintf(" This zrok instance only allows a share to receive %v, send %v, totalling not more than %v for each %v.", rxLimit, txLimit, totalLimit, limit.Period) +
			fmt.Sprintf(" If you exceed the transfer limit, access to your shares will be temporarily disabled (until the last %v falls below the transfer limit).", limit.Period)

		if err := sendLimitWarningEmail(a.cfg, acct.Email, detail); err != nil {
			return errors.Wrapf(err, "error sending limit warning email to '%v'", acct.Email)
		}
	}

	return nil
}