package domain

import (
	"strconv"
	"strings"
)

type Coords struct {
	x int
	y int
}

var ErrInvalidCoordsString error = simpleError{
	msg:  "invalid coords string, should be x|y",
	typ:  ErrorTypeIncorrectInput,
	code: "invalid-coords-string",
}

const coordsSubstrings = 2

func newCoords(s string) (Coords, error) {
	coords := strings.SplitN(s, "|", coordsSubstrings)
	if len(coords) != coordsSubstrings {
		return Coords{}, ErrInvalidCoordsString
	}

	x, err := strconv.Atoi(coords[0])
	if err != nil || x <= 0 {
		return Coords{}, ErrInvalidCoordsString
	}

	y, err := strconv.Atoi(coords[1])
	if err != nil || y <= 0 {
		return Coords{}, ErrInvalidCoordsString
	}

	return Coords{
		x: x,
		y: y,
	}, nil
}

func (c Coords) X() int {
	return c.x
}

func (c Coords) Y() int {
	return c.y
}

func (c Coords) String() string {
	return strconv.Itoa(c.x) + "|" + strconv.Itoa(c.y)
}