import { Ray, Axes, rayIntersectTriangle } from '../src/ray';
import { Vector3 } from '../src/vector';
import { Triangle } from '../src/triangle';
import { ASSERT } from '../src/util';

test('rayIntersectTriangle x-axis #1', () => {
    const ray: Ray = {
        origin: new Vector3(-1, 0, 0),
        axis: Axes.x,
    };
    const tri = new Triangle(
        new Vector3(5, -1, -1),
        new Vector3(5,  0,  1),
        new Vector3(5,  1, -1),
    );
    const intersects = rayIntersectTriangle(ray, tri.v0, tri.v1, tri.v2);
    expect(intersects).toBeDefined();
    ASSERT(intersects);
    expect(intersects.equals(new Vector3(5, 0, 0))).toEqual(true);
});

test('rayIntersectTriangle x-axis #2', () => {
    const ray: Ray = {
        origin: new Vector3(1, 0, 0),
        axis: Axes.x,
    };
    const tri = new Triangle(
        new Vector3(0, -1, -1),
        new Vector3(0,  0,  1),
        new Vector3(0,  1, -1),
    );
    const intersects = rayIntersectTriangle(ray, tri.v0, tri.v1, tri.v2);
    expect(intersects).toBeUndefined();
});

test('rayIntersectTriangle y-axis #1', () => {
    const ray: Ray = {
        origin: new Vector3(0, -1, 0),
        axis: Axes.y,
    };
    const tri = new Triangle(
        new Vector3(-1, 6, -1),
        new Vector3( 0, 6,  1),
        new Vector3( 1, 6, -1),
    );
    const intersects = rayIntersectTriangle(ray, tri.v0, tri.v1, tri.v2);
    expect(intersects).toBeDefined();
    ASSERT(intersects);
    expect(intersects.equals(new Vector3(0, 6, 0))).toEqual(true);
});

test('rayIntersectTriangle y-axis #2', () => {
    const ray: Ray = {
        origin: new Vector3(0, 1, 0),
        axis: Axes.y,
    };
    const tri = new Triangle(
        new Vector3(-1, 0, -1),
        new Vector3( 0, 0,  1),
        new Vector3( 1, 0, -1),
    );
    const intersects = rayIntersectTriangle(ray, tri.v0, tri.v1, tri.v2);
    expect(intersects).toBeUndefined();
});

test('rayIntersectTriangle z-axis #1', () => {
    const ray: Ray = {
        origin: new Vector3(0, 0, -1),
        axis: Axes.z,
    };
    const tri = new Triangle(
        new Vector3(-1, -1, 7),
        new Vector3( 0,  1, 7),
        new Vector3( 1, -1, 7),
    );
    const intersects = rayIntersectTriangle(ray, tri.v0, tri.v1, tri.v2);
    expect(intersects).toBeDefined();
    ASSERT(intersects);
    expect(intersects.equals(new Vector3(0, 0, 7))).toEqual(true);
});

test('rayIntersectTriangle z-axis #2', () => {
    const ray: Ray = {
        origin: new Vector3(0, 0, 1),
        axis: Axes.z,
    };
    const tri = new Triangle(
        new Vector3(-1, -1, 0),
        new Vector3( 0,  1, 0),
        new Vector3( 1, -1, 0),
    );
    const intersects = rayIntersectTriangle(ray, tri.v0, tri.v1, tri.v2);
    expect(intersects).toBeUndefined();
});