package db

import (
	"errors"

	"gorm.io/gorm"
)

type Word struct {
	gorm.Model
	Value string
}

var (
	ErrCardValueEmpty     = errors.New("the 'Value' field for 'Word' cannot be empty")
	ErrCardValueNotUnique = errors.New("the 'Value' field for 'Word' have to be unique for user")
)

func (c *Word) BeforeSave(tx *gorm.DB) error {
	if c.Value == "" {
		return ErrCardValueEmpty
	}

	var dup Word
	if err := tx.Find(&dup, Word{Value: c.Value}).Error; err != nil {
		return err
	}

	if c.ID != dup.ID && dup.ID != 0 {
		return ErrCardValueNotUnique
	}

	return nil
}