package soko

import (
	"opslag.de/schobers/geom"
)

type EntityType byte
type Tile byte

const (
	EntityTypeInvalid   EntityType = EntityType(0)
	EntityTypeNone                 = '_'
	EntityTypeCharacter            = '@'
	EntityTypeEgg                  = 'X'
	EntityTypeBrick                = 'B'
)

func (e EntityType) IsValid() bool {
	switch e {
	case EntityTypeNone:
	case EntityTypeCharacter:
	case EntityTypeEgg:
	case EntityTypeBrick:
	default:
		return false
	}
	return true
}

const (
	TileInvalid Tile = Tile(0)
	TileNothing      = '.'
	TileBasic        = '#'
	TileMagma        = '~'
)

func (t Tile) IsValid() bool {
	switch t {
	case TileNothing:
	case TileBasic:
	case TileMagma:
	default:
		return false
	}
	return true
}

type Level struct {
	Width    int
	Height   int
	Tiles    []Tile
	Entities []EntityType
}

func (l Level) IdxToPos(i int) geom.Point { return geom.Pt(i%l.Width, i/l.Width) }

func (l Level) PosToIdx(p geom.Point) int {
	if p.X < 0 || p.Y < 0 || p.X >= l.Width || p.Y >= l.Height {
		return -1
	}
	return p.Y*l.Width + p.X
}