import standard;
import random;
import node;


//persistent members of the scene node
var rng: opaque = null;

//map data (interleaved)
var tilemap: [int] = null;


//lifetime functions
fn onInit(node: opaque) {
	//init the rng with a seed (random)
	if (rng != null) {
		rng.freeRandomGenerator();
	}
	rng = createRandomGenerator(clock().hash());

	//generate the level, filling out the data
	generateLevel(rng);

	//generate the child node to render the map
	var child: opaque = node.loadChild("scripts:/tilemap/rendernode.toy");

	child.callNodeFn("setTilemap", tilemap);
}

fn onFree(node: opaque) {
	if (rng != null) {
		rng.freeRandomGenerator();
	}
}


//scene loading
fn generateLevel(rng: opaque) {
	import runner;

	//load and run the generator script
	var generatorScript: opaque = loadScript("scripts:/tilemap/generator.toy");
	generatorScript.runScript();

	//call the functions
	generatorScript.callScriptFn("generateTilemapData", rng);

	//get the resulting blobs of data for processing
	tilemap = generatorScript.getScriptVar("tilemap");

	//free
	generatorScript.freeScript();
}






//polyfills
fn loadChild(parent: opaque, fname: string) {
	//TODO: add this to the API proper
	var child: opaque = loadNode(fname);
	parent.pushNode(child);
	return child;
}