""" CSP 单元测试 """
# pylint: disable=missing-class-docstring
import os

import numpy as np

from core.sig_chain.sig_reader import Reader
from core.mi.eeg_csp import CspOffline
from core.mi.eeg_csp import CSPBasedClassifier

TEST_DATA_PATH = "tests/data/"
PONY_BDF_FILE_PATH = os.path.join(TEST_DATA_PATH, "eeg_raw_data.bdf")
NEO_BDF_FILE_PATH = os.path.join(TEST_DATA_PATH, "neo_eeg_raw_data.bdf")
PONY_CSP_FILE_PATH = os.path.join(TEST_DATA_PATH, "pony_csp.png")
NEO_CSP_FILE_PATH = os.path.join(TEST_DATA_PATH, "neo_csp.png")


def setup_module():
    if not os.path.exists(TEST_DATA_PATH):
        os.makedirs(TEST_DATA_PATH)


def teardown_module():
    if os.path.exists(PONY_CSP_FILE_PATH):
        os.remove(PONY_CSP_FILE_PATH)
    if os.path.exists(NEO_CSP_FILE_PATH):
        os.remove(NEO_CSP_FILE_PATH)


class TestCSPBasedClassifier():

    @classmethod
    def setup_class(cls):
        ch_names = [
            "T6", "P4", "Pz", "M2", "F8", "F4", "Fp1", "Cz", "M1", "F7", "F3",
            "C3", "T3", "A1", "Oz", "O1", "O2", "Fz", "C4", "T4", "Fp2", "A2",
            "T5", "P3"
        ]

        reader = Reader()
        cls.raw = reader.read(PONY_BDF_FILE_PATH, tuple(ch_names))
        cls.raw.annotations.rename({
            "trainSuccess": "mi",
            "trainFailed": "mi",
            "restState": "rest"
        })
        cls.raw.annotations.duration += 0.999

    def setup_method(self):
        self.clf = CSPBasedClassifier()

    def test_train_and_test_with_same_sample_length(self):
        ch_names = ["C3", "Cz", "C4"]
        csp_offline = CspOffline()
        epochs, _ = csp_offline.get_epochs(self.raw, tuple(ch_names))
        labels = epochs.events[:, -1]

        self.clf.fit(epochs.get_data(), labels)

        predicts = self.clf.predict(epochs.get_data())
        acc = np.sum(predicts == labels) / predicts.size

        assert self.clf.is_trained
        assert acc >= 0.8

    def test_train_and_test_with_different_sample_length(self):
        ch_names = ["C3", "Cz", "C4"]
        csp_offline1 = CspOffline()
        epochs1, _ = csp_offline1.get_epochs(self.raw, tuple(ch_names))

        csp_offline3 = CspOffline()
        csp_offline3.tmax = 3
        epochs3, _ = csp_offline3.get_epochs(self.raw, tuple(ch_names))

        labels = epochs1.events[:, -1]
        self.clf.fit(epochs3.get_data(), labels)

        predicts = self.clf.predict(epochs1.get_data())
        acc = np.sum(predicts == labels) / predicts.size

        assert self.clf.is_trained
        assert acc >= 0.8


def test_main_csp_offline_pony():
    ch_names = [
        "T6", "P4", "Pz", "F8", "F4", "Fp1", "Cz", "F7", "F3", "C3", "T3", "Oz",
        "O1", "O2", "Fz", "C4", "T4", "Fp2", "T5", "P3"
    ]

    reader = Reader()
    raw = reader.read(PONY_BDF_FILE_PATH, tuple(ch_names))
    raw.annotations.rename({
        "trainSuccess": "mi",
        "trainFailed": "mi",
        "restState": "rest"
    })

    csp_offline = CspOffline()
    epochs, _ = csp_offline.get_epochs(raw, tuple(ch_names))
    csp = csp_offline.process(epochs)
    csp_offline.draw_image(csp, epochs.info, save_path=PONY_CSP_FILE_PATH)


def test_main_csp_offline_neo():
    ch_names = ["C3", "FC3", "CP5", "CP1", "C4", "FC4", "CP2", "CP6"]

    reader = Reader()
    raw = reader.read(NEO_BDF_FILE_PATH, tuple(ch_names))
    raw.annotations.rename({
        "trainSuccess": "mi",
        "trainFailed": "mi",
        "restState": "rest"
    })

    csp_offline = CspOffline()
    epochs, _ = csp_offline.get_epochs(raw, tuple(ch_names))
    csp = csp_offline.process(epochs)
    csp_offline.draw_image(csp, epochs.info, save_path=NEO_CSP_FILE_PATH)