package world

import (
	"github.com/df-mc/dragonfly/server/block/cube"
	"github.com/df-mc/dragonfly/server/world/chunk"
)

// Generator handles the generating of newly created chunks. Worlds have one generator which is used to
// generate chunks when the provider of the world cannot find a chunk at a given chunk position.
type Generator interface {
	// GenerateChunk generates a chunk at a chunk position passed. The generator sets blocks in the chunk that
	// is passed to the method.
	GenerateChunk(pos ChunkPos, chunk *chunk.Chunk)
	// DefaultSpawn returns the default spawn position for worlds using this generator in the dimension passed.
	DefaultSpawn(dim Dimension) cube.Pos
}

// NopGenerator is the default generator a world. It places no blocks in the world which results in a void
// world.
type NopGenerator struct{}

// GenerateChunk ...
func (NopGenerator) GenerateChunk(ChunkPos, *chunk.Chunk) {}

// DefaultSpawn ...
func (NopGenerator) DefaultSpawn(Dimension) cube.Pos { return cube.Pos{} }