package tokens

import (
	"github.com/pkg/errors"
	"github.com/shopspring/decimal"

	"git.lehouerou.net/laurent/sorare/types"
)

type MonetaryAmount struct {
	ReferenceCurrency types.SupportedCurrency `graphql:"referenceCurrency"`
	Eur               *decimal.Decimal        `graphql:"eur"`
	Usd               *decimal.Decimal        `graphql:"usd"`
	Gbp               *decimal.Decimal        `graphql:"gbp"`
	Wei               *decimal.Decimal        `graphql:"wei"`
}

func (m MonetaryAmount) AmountInReferenceCurrency() (decimal.Decimal, error) {
	switch m.ReferenceCurrency {
	case types.SupportedCurrencyEUR:
		if m.Eur == nil {
			return decimal.Zero, errors.Errorf("missing EUR amount")
		}
		return *m.Eur, nil
	case types.SupportedCurrencyUSD:
		if m.Usd == nil {
			return decimal.Zero, errors.Errorf("missing USD amount")
		}
		return *m.Usd, nil
	case types.SupportedCurrencyGBP:
		if m.Gbp == nil {
			return decimal.Zero, errors.Errorf("missing GBP amount")
		}
		return *m.Gbp, nil
	case types.SupportedCurrencyWEI:
		if m.Wei == nil {
			return decimal.Zero, errors.Errorf("missing WEI amount")
		}
		return *m.Wei, nil
	default:
		return decimal.Zero, errors.Errorf("unsupported currency %s", m.ReferenceCurrency)
	}
}