package model

import (
	"fmt"
	"github.com/gshopify/service-wrapper/model"
	"github.com/mitchellh/mapstructure"
	"github.com/nyaruka/phonenumbers"
)

type Phone struct {
	number *phonenumbers.PhoneNumber

	Verified    bool   `mapstructure:"phone_verified"`
	PhoneNumber string `mapstructure:"phone_number"`
	PhoneRegion string `mapstructure:"phone_region"`
}

func ParsePhoneNumber(m map[string]any) (*Phone, error) {
	p := Phone{}
	if err := mapstructure.Decode(m, &p); err != nil {
		return nil, err
	}

	return NewPhoneNumber(p.PhoneNumber, p.PhoneRegion, p.Verified)
}

func NewPhoneNumber(number, region string, verified bool) (*Phone, error) {
	var (
		p = Phone{
			PhoneNumber: number,
			PhoneRegion: region,
			Verified:    verified,
		}
		err error
	)

	if p.PhoneNumber == "" || p.PhoneRegion == "" {
		return nil, nil
	}

	if r := model.CountryCode(p.PhoneRegion); !r.IsValid() {
		return nil, fmt.Errorf("illegal country code: `%s`", p.PhoneRegion)
	}

	p.number, err = phonenumbers.Parse(p.PhoneNumber, p.PhoneRegion)
	if err != nil {
		return nil, err
	}

	if p.number.CountryCode != nil {
		if cc := phonenumbers.GetRegionCodeForCountryCode(int(*p.number.CountryCode)); cc != p.PhoneRegion {
			p.PhoneRegion = cc
		}
	}

	return &p, nil
}

func (p *Phone) String() string {
	return phonenumbers.Format(p.number, phonenumbers.INTERNATIONAL)
}