package postgres

import (
	"github.com/kcotugno/tacitus"
)

const (
	conf_columns = `product, type, last_id`
	conf_insert  = `INSERT INTO confirmations (` + conf_columns +
		`) VALUES ($1, $2, $3) RETURNING id, ` + conf_columns + `;`
	conf_find_product = `SELECT id, ` + conf_columns + ` FROM confirmations ` +
		`WHERE product = $1 AND type = $2;`
	conf_update = `UPDATE confirmations SET product = $1, type = $2, last_id = $3 ` +
		`WHERE id = $4;`
)

type ConfirmationService struct {
	client *Client
}

func (s *ConfirmationService) Confirmation(product, c_type string) (tacitus.Confirmation, error) {
	var conf tacitus.Confirmation

	s.client.logQuery(conf_find_product, product, c_type)

	row := s.client.db.QueryRow(conf_find_product, product, c_type)
	err := row.Scan(&conf.Id, &conf.Product, &conf.Type, &conf.LastId)
	if err != nil {
		s.client.logError(conf_find_product, err, product, c_type)

		return conf, err
	}

	return conf, nil
}

func (s *ConfirmationService) CreateConfirmation(c tacitus.Confirmation) (tacitus.Confirmation, error) {
	var conf tacitus.Confirmation

	s.client.logQuery(conf_insert, c.Product, c.Type, c.LastId)

	row := s.client.db.QueryRow(conf_insert, c.Product, c.Type, c.LastId)
	err := row.Scan(&conf.Id, &conf.Product, &conf.Type, &conf.LastId)
	if err != nil {
		s.client.logError(conf_insert, err, c.Product, c.Type, c.LastId)

		return conf, err
	}

	return conf, nil
}

func (s *ConfirmationService) UpdateConfirmation(c tacitus.Confirmation) (tacitus.Confirmation, error) {
	s.client.logQuery(conf_update, c.Product, c.Type, c.LastId, c.Id)

	_, err := s.client.db.Exec(conf_update, c.Product, c.Type, c.LastId, c.Id)
	if err != nil {
		s.client.logError(conf_update, err, c.Product, c.Type, c.LastId, c.Id)
	}

	return c, err
}