#!/usr/bin/env python3

import os
from pocketsphinx import Decoder, Config, get_model_path
import unittest
import tempfile

MODELDIR = os.path.join(os.path.dirname(__file__), "../../model")
DATADIR = os.path.join(os.path.dirname(__file__), "../../test/data")


class TestConfig(unittest.TestCase):
    def test_bogus_old_config(self):
        """Test backward-compatibility. DO NOT USE Config THIS WAY!"""
        config = Decoder.default_config()
        intval = 256
        floatval = 0.025
        stringval = "~/pocketsphinx"
        boolval = True

        # Check values that was previously set.
        s = config.get_float("-wlen")
        print("Float:", floatval, " ", s)
        self.assertEqual(s, 0.025625)
        config.set_float("-wlen", floatval)
        s = config.get_float("-wlen")
        self.assertEqual(s, floatval)

        s = config.get_int("-nfft")
        print("Int:", intval, " ", s)
        config.set_int("-nfft", intval)
        s = config.get_int("-nfft")
        self.assertEqual(s, intval)

        s = config.get_string("-rawlogdir")
        print("String:", stringval, " ", s)
        config.set_string("-rawlogdir", stringval)
        s = config.get_string("-rawlogdir")
        self.assertEqual(s, stringval)

        s = config.get_boolean("-backtrace")
        print("Boolean:", boolval, " ", s)
        config.set_boolean("-backtrace", boolval)
        s = config.get_boolean("-backtrace")
        self.assertEqual(s, boolval)

        config.set_string_extra("-something12321", "abc")
        s = config.get_string("-something12321")
        self.assertEqual(s, "abc")

    def test_config_file(self):
        config = Config.parse_file(
            os.path.join(MODELDIR, "en-us", "en-us", "feat.params")
        )
        self.assertEqual(config["lowerf"], 130)
        self.assertEqual(config["upperf"], 6800)
        self.assertEqual(config["nfilt"], 25)
        self.assertEqual(config["transform"], "dct")
        self.assertEqual(config["lifter"], 22)
        self.assertEqual(config["feat"], "1s_c_d_dd")
        self.assertEqual(config["svspec"], "0-12/13-25/26-38")
        self.assertEqual(config["agc"], "none")
        self.assertEqual(config["cmn"], "batch")
        self.assertEqual(config["varnorm"], False)
        # not an actual config parameter, it seems!
        with self.assertRaises(KeyError):
            self.assertEqual(config["model"], "ptm")
        self.assertEqual(config["remove_noise"], True)


class TestConfigHash(unittest.TestCase):
    def test_config__getitem(self):
        config = Config()
        self.assertEqual(config["samprate"], 16000)
        self.assertEqual(config["nfft"], 0)
        self.assertEqual(config["fsg"], None)
        self.assertEqual(config["backtrace"], False)
        self.assertEqual(config["feat"], "1s_c_d_dd")

    def test_config_easyinit(self):
        config = Config(samprate=11025, fsg=None, backtrace=False, feat="1s_c_d_dd")
        self.assertEqual(config["samprate"], 11025)
        self.assertEqual(config.get_int("-samprate"), 11025)
        self.assertEqual(config["nfft"], 0)
        self.assertEqual(config["fsg"], None)
        self.assertEqual(config["backtrace"], False)
        self.assertEqual(config["feat"], "1s_c_d_dd")

    def test_config_coercion(self):
        config = Config()
        config["samprate"] = 48000.0
        self.assertEqual(config["samprate"], 48000)
        config["nfft"] = "1024"
        self.assertEqual(config["nfft"], 1024)

    def test_config_defaults(self):
        # System-wide defaults
        config = Config()
        self.assertEqual(config["hmm"], get_model_path("en-us/en-us"))
        self.assertEqual(config["lm"], get_model_path("en-us/en-us.lm.bin"))
        self.assertEqual(config["dict"], get_model_path("en-us/cmudict-en-us.dict"))
        # Override them
        config = Config(hmm=None, lm=None, dict=None)
        self.assertEqual(config["hmm"], None)
        self.assertEqual(config["lm"], None)
        self.assertEqual(config["dict"], None)
        # Legacy method of overriding
        config = Config(lm=False)
        self.assertEqual(config["hmm"], get_model_path("en-us/en-us"))
        self.assertEqual(config["lm"], None)
        self.assertEqual(config["dict"], get_model_path("en-us/cmudict-en-us.dict"))
        # Check that POCKETSPHINX_PATH is respected
        os.environ["POCKETSPHINX_PATH"] = MODELDIR
        config = Config()
        self.assertEqual(config["hmm"], os.path.join(MODELDIR, "en-us/en-us"))

    def test_stupid_config_hacks(self):
        """Test various backward-compatibility special cases."""
        config = Config()
        self.assertEqual(config["lm"], get_model_path("en-us/en-us.lm.bin"))
        config = Config(jsgf="spam_eggs_and_spam.gram")
        self.assertIsNone(config["lm"])
        self.assertEqual(config["jsgf"], "spam_eggs_and_spam.gram")
        with self.assertRaises(RuntimeError):
            config = Config()
            config["jsgf"] = os.path.join(DATADIR, "goforward.gram")
            _ = Decoder(config)
        with self.assertRaises(RuntimeError):
            _ = Decoder(kws=os.path.join(DATADIR, "goforward.kws"),
                        jsgf=os.path.join(DATADIR, "goforward.gram"))
        _ = Decoder(jsgf=os.path.join(DATADIR, "goforward.gram"))

class TestConfigIter(unittest.TestCase):
    def test_config__iter(self):
        config = Config()
        default_len = len(config)
        for key in config:
            self.assertTrue(key in config)
        for key, value in config.items():
            self.assertTrue(key in config)
            self.assertEqual(config[key], value)
        config = Config()
        self.assertEqual(default_len, len(config))
        config["lm"] = None
        config["hmm"] = os.path.join(MODELDIR, "en-us", "en-us")
        config["fsg"] = os.path.join(DATADIR, "goforward.fsg")
        config["lm"] = None  # It won't do this automatically
        config["dict"] = os.path.join(DATADIR, "turtle.dic")
        self.assertEqual(default_len, len(config))
        for key in config:
            self.assertTrue(key in config)
        for key, value in config.items():
            self.assertTrue(key in config)
            self.assertEqual(config[key], value)
        self.assertIsNone(config["mdef"])
        # Now check weird extra value stuff.  Length should never change
        _ = Decoder(config)
        # But mdef, etc, should be filled in
        default_mdef = config["mdef"]
        self.assertIsNotNone(default_mdef)
        # And we should get them for dash and underscore versions too
        self.assertEqual(default_mdef, config["-mdef"])
        self.assertEqual(default_mdef, config["_mdef"])
        self.assertEqual(default_len, len(config))
        for key in config:
            self.assertTrue(key in config)
        for key, value in config.items():
            self.assertTrue(key in config)
            self.assertEqual(config[key], value)


class TestConfigDefn(unittest.TestCase):
    def test_config_describe(self):
        config = Config()
        for defn in config.describe():
            if defn.name == "hmm":
                self.assertTrue(defn.required)


class TestConfigJSON(unittest.TestCase):
    def assert_parsed(self, config):
        self.assertEqual(config["hmm"], "/path/to/some/stuff")
        self.assertEqual(config["samprate"], 11025)
        self.assertAlmostEqual(config["beam"], 1e-69)

    def test_config_parse(self):
        config = Config.parse_json("""
{
        "hmm": "/path/to/some/stuff",
        "samprate": 11025,
        "beam": 1e-69
}
""")
        self.assert_parsed(config)
        with tempfile.TemporaryFile(mode="w+t") as tf:
            tf.write(config.dumps())
            tf.flush()
            tf.seek(0, 0)
            json = tf.read()
        config2 = Config.parse_json(json)
        self.assert_parsed(config2)
        for k in config:
            self.assertAlmostEqual(config[k], config2[k], 2)
        config3 = Config.parse_json(
            "hmm: /path/to/some/stuff, samprate: 11025, beam: 1e-69")
        self.assert_parsed(config3)
        for k in config:
            self.assertAlmostEqual(config[k], config3[k], 2)

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