package model

import (
	"github.com/caos/zitadel/internal/crypto"
	caos_errs "github.com/caos/zitadel/internal/errors"
	es_models "github.com/caos/zitadel/internal/eventstore/models"
	"github.com/ttacon/libphonenumber"
	"time"
)

const (
	//TODO: How do we get region?
	defaultRegion = "CH"
)

type Phone struct {
	es_models.ObjectRoot

	PhoneNumber     string
	IsPhoneVerified bool
}

type PhoneCode struct {
	es_models.ObjectRoot

	Code   *crypto.CryptoValue
	Expiry time.Duration
}

func (p *Phone) IsValid() bool {
	err := p.formatPhone()
	return p.PhoneNumber != "" && err == nil
}

func (p *Phone) formatPhone() error {
	phoneNr, err := libphonenumber.Parse(p.PhoneNumber, defaultRegion)
	if err != nil {
		return caos_errs.ThrowPreconditionFailed(nil, "EVENT-so0wa", "Phonenumber is invalid")
	}
	p.PhoneNumber = libphonenumber.Format(phoneNr, libphonenumber.E164)
	return nil
}

func (p *Phone) GeneratePhoneCodeIfNeeded(phoneGenerator crypto.Generator) (*PhoneCode, error) {
	var phoneCode *PhoneCode
	if p.IsPhoneVerified {
		return phoneCode, nil
	}
	phoneCode = new(PhoneCode)
	return phoneCode, phoneCode.GeneratePhoneCode(phoneGenerator)
}

func (code *PhoneCode) GeneratePhoneCode(phoneGenerator crypto.Generator) error {
	phoneCodeCrypto, _, err := crypto.NewCode(phoneGenerator)
	if err != nil {
		return err
	}
	code.Code = phoneCodeCrypto
	code.Expiry = phoneGenerator.Expiry()
	return nil
}