import sys
import unittest
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "src"))

from cthulhu import piperfactory


class PiperFactoryRateMappingTests(unittest.TestCase):
    def setUp(self):
        self.server = piperfactory.SpeechServer.__new__(piperfactory.SpeechServer)

    def test_default_rate_maps_to_native_piper_speed(self):
        self.assertEqual(1.0, self.server._mapRate(50))

    def test_rate_scale_uses_full_cthulhu_range(self):
        self.assertEqual(2.0, self.server._mapRate(0))
        self.assertEqual(0.25, self.server._mapRate(100))

    def test_high_screen_reader_rate_is_substantially_faster(self):
        self.assertAlmostEqual(0.415, self.server._mapRate(89), places=3)

    def test_rate_values_are_clamped(self):
        self.assertEqual(2.0, self.server._mapRate(-1))
        self.assertEqual(0.25, self.server._mapRate(101))


if __name__ == "__main__":
    unittest.main()