import { v2 } from "../../common/utils.ts";
import { range, Vec2 } from "../../common/utils.ts";
import { Engine } from "../engine.ts";
import { query_in_rect } from "./world.ts";

export class CompDisplay {
	display;
	constructor(display: string) {
		this.display = display;
	}
}

export function sys_render_world(center: Vec2, size: Vec2) {
	return (engine: Engine) => {
		const radius = size.scale(0.5);
		const result = Array.from(range(0, size.y())).map(() => Array.from(range(0, size.x())).map(() => "  "));
		const min = center.sub(radius);
		const max = center.add(radius).sub(v2(1, 1));
		for (const [pos, display] of engine.all(query_in_rect(min, max).with(CompDisplay))) {
			const local_pos = pos.pos.sub(min);
			result[local_pos.y()][local_pos.x()] = display.display;
		}
		return result.map((line) => line.join("")).toReversed().join("\n");
	};
}