# Test of the CCW3P routine
# Copyright (C) 2019  Robin Scheibler, Cyril Cadoux
#
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# SOFTWARE.
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import numpy as np

import pyroomacoustics as pra

cases = {
    "anti-clockwise": {
        "points": np.array([[1, -1], [2, -1], [1, 0]]),
        "expected": 1,  # anti-clockwise
        "label": "Test: CCW3P anti-clockwise",
    },
    "clockwise": {
        "points": np.array([[1, -1], [1, 0], [2, -1]]),
        "expected": -1,  # clockwise
        "label": "Test: CCW3P clockwise",
    },
    "co-linear": {
        "points": np.array([[0, 0], [0.5, 0.5], [1, 1]]),
        "expected": 0,  # co-linear
        "label": "Test: CCW3P co-linear",
    },
}


def ccw3p(case):
    p1, p2, p3 = case["points"]

    r = pra.libroom.ccw3p(p1, p2, p3)

    assert r == case["expected"], case["label"] + " returned: {}, expected {}".format(
        r, case["expected"]
    )


def test_ccw3p_anticlockwise():
    ccw3p(cases["anti-clockwise"])


def test_ccw3p_clockwise():
    ccw3p(cases["clockwise"])


def test_ccw3p_colinear():
    ccw3p(cases["co-linear"])


if __name__ == "__main__":
    for lbl, case in cases.items():
        try:
            ccw3p(case)
        except:
            print("{} failed".format(lbl))
