package world

import "github.com/pnx/go-raytracer/math"

const TileSize = 64

type Special byte

const (
	Empty       Special = 0
	PlayerStart Special = 'S'
)

type Level struct {
	W, H     int
	Grid     []byte
	Specials []Special
}

func (m Level) Wall(x, y int) bool {
	return m.Grid[(y*m.W)+x] > 0
}

func (m Level) Cell(x, y int) byte {
	return m.Grid[(y*m.W)+x]
}

func (m Level) PosToCell(x, y float64) (int, int) {
	return int(x) / TileSize, int(y) / TileSize
}

func (m Level) PlayerStart() math.Vec2[int] {
	for k, v := range m.Specials {
		if v == PlayerStart {
			return math.Vec2[int]{
				X: k % m.W,
				Y: k / m.W,
			}
		}
	}
	return math.Vec2[int]{X: -1, Y: -1}
}