import { describe, expect, it } from 'vitest';

import type { RenderScene2d } from './types';
import { packedPolylineBytes, packTilePolylines } from './packed-polylines';

describe('packTilePolylines', () => {
	it('moves nested contour geometry into flat transferable buffers', () => {
		const scene: RenderScene2d = {
			viewport: { x_min: -1, x_max: 1, y_min: -1, y_max: 1, width: 256, height: 256 },
			coverage: { x_min: -1, x_max: 1, y_min: -1, y_max: 1, width: 256, height: 256 },
			layers: [
				{
					type: 'polyline',
					geometry_id: 7,
					expression_id: 'circle',
					vertices: [
						[-1, 0],
						[0, 1],
						[1, 0]
					],
					breaks: [2],
					color: '#2563eb',
					line_style: 'solid',
					source_kind: 'implicit',
					sampling: {
						strategy: 'marching_squares',
						target_samples: 256,
						vertex_count: 3,
						segment_count: 1,
						max_depth: null,
						max_depth_reached: false,
						vertex_budget: null,
						vertex_budget_reached: false,
						warnings: []
					}
				}
			],
			diagnostics: [],
			variables: [],
			expression_roles: {},
			model_revisions: {}
		};

		const packed = packTilePolylines(scene);

		expect(scene.layers).toEqual([]);
		expect(packed?.[0].coordinates).toEqual(new Float64Array([-1, 0, 0, 1, 1, 0]));
		expect(packed?.[0].breaks).toEqual(new Uint32Array([2]));
		expect(packed?.[0].layer.expression_id).toBe('circle');
		expect(packedPolylineBytes(packed)).toBe(52);
	});
});