import type { BlockRegistry } from "$/common/everything_registry.ts";
import type { SpriteRegion } from "$/common/constants.ts";
import type { OreJson } from "$/common/mod_data.ts";

// messages between the main thread and the chunk workers

export type ToChunkWorker =
	| {
		type: "init";
		// the blocks registry without its functions, indexed by numeric id
		blocks_registry: BlockRegistry[];
		block_ids: Record<string, number>;
		textures_info: Record<string, SpriteRegion>;
		image: { width: number; height: number };
		// mods' worldgen scripts and ores, so generation matches the server
		worldgen_scripts: { mod: string; url: string }[];
		ores: OreJson[];
	}
	| { type: "generate"; chunk_x: number; chunk_z: number; seed: string }
	| { type: "mesh"; chunk_x: number; chunk_z: number; version: number; padded_chunk: Uint32Array };

export type FromChunkWorker =
	| {
		type: "generated";
		chunk_x: number;
		chunk_z: number;
		blocks: Uint32Array;
		// blocks that landed in other chunks (tree leaves), flattened as x, y, z, numeric id
		spills: Int32Array;
	}
	| {
		type: "meshed";
		chunk_x: number;
		chunk_z: number;
		version: number;
		opaque_vertices: Float32Array;
		opaque_count: number;
		transparent_vertices: Float32Array;
		transparent_count: number;
	};