package service

import (
	"context"
	"fmt"

	"card-to-iban/internal/card"
)

type ConversionResult struct {
	IBAN               string
	UpstreamHTTPStatus int
	RawResponse        []byte
}

type CardToIBANClient interface {
	Convert(
		ctx context.Context,
		cardNumber string,
	) (ConversionResult, error)
}

type CardService struct {
	client CardToIBANClient
}

func NewCardService(client CardToIBANClient) *CardService {
	return &CardService{
		client: client,
	}
}

func (s *CardService) ConvertCardToIBAN(
	ctx context.Context,
	cardNumber string,
) (ConversionResult, error) {
	if err := card.Validate(cardNumber); err != nil {
		return ConversionResult{}, err
	}

	result, err := s.client.Convert(ctx, cardNumber)
	if err != nil {
		return result, fmt.Errorf("convert card to iban: %w", err)
	}

	return result, nil
}