import array
import copy
import os
import shutil
import sys
import tempfile
import unittest

from tests.utils_testing import get_path_for_data_file
from urh import settings
from urh.signalprocessing.Encoding import Encoding
from urh.util import util
from urh.util.WSPChecksum import WSPChecksum


class TestDecoding(unittest.TestCase):
    def test_carrier(self):
        e = Encoding()

        # Test 1
        e.carrier = "----1....1**"  # or "....1....101", ...
        original_inpt = e.str2bit("000010000100111111111100")
        inpt = copy.copy(original_inpt)
        # print("\nOriginal:", inpt)
        output, err, _ = e.code_carrier(True, inpt)
        # print("Decoded: ", output, err)
        newinpt, err, _ = e.code_carrier(False, output)
        # print("Encoded: ", newinpt, err)
        self.assertEqual(original_inpt, newinpt)

    def test_cut_decoding(self):
        e = Encoding()

        received = e.str2bit("00001010010101111111000")
        expected_result = e.str2bit("1010010101111111000")
        e.cutmode = 0
        e.cutmark = [True, False, True, False]
        decoded, err, _ = e.code_cut(True, received)
        self.assertEqual(decoded, expected_result)

        received = e.str2bit("00001010010101111111000")
        expected_result = e.str2bit("00001010")
        e.cutmode = 1
        e.cutmark = [True, False, True, False]
        decoded, err, _ = e.code_cut(True, received)
        self.assertEqual(decoded, expected_result)

        received = e.str2bit("00001010010101111111000")
        expected_result = e.str2bit("001010010101111111000")
        e.cutmode = 2
        e.cutmark = 2
        decoded, err, _ = e.code_cut(True, received)
        self.assertEqual(decoded, expected_result)

        received = e.str2bit("00001010010101111111000")
        expected_result = e.str2bit("000")
        e.cutmode = 3
        e.cutmark = 2
        decoded, err, _ = e.code_cut(True, received)
        self.assertEqual(decoded, expected_result)

        received = e.str2bit("00001010010101111111000")
        expected_result = e.str2bit("00001010010101111111000")
        e.cutmode = 0
        e.cutmark = [True, False, True, False, True, False]
        decoded, err, _ = e.code_cut(True, received)
        self.assertEqual(decoded, expected_result)

        received = e.str2bit("11010101010101010101010101010101011101001110010101110100111001010000100011011111110000100001011100101010101111101111010000001110101111010000100000110100000010011011110101100100011110000100011011100010100111100000000000000000")
        expected_result = e.str2bit("1010101010101010101010101010101011101001110010101110100111001010000100011011111110000100001011100101010101111101111010000001110101111010000100000110100000010011011110101100100011110000100011011100010100111100000000000000000")
        e.cutmode = 0
        e.cutmark = e.str2bit("10101010101010101010101010101010")
        decoded, err, _ = e.code_cut(True, received)
        self.assertEqual(decoded, expected_result)

    def test_enocean_switch_telegram(self):
        e = Encoding()

        received = "010101010110100111101010111011101110111011100110001011101010001011101110110111011101000"
        # First step is invert the received bits!!!
        # received = "10101010 1001 011000010101 000100010001 000100011001 110100010101 110100010001 0010001000 1011"
        preamble = "10101010"
        sof = "1001"
        eof = "1011"

        self.assertIn(preamble, received)
        self.assertIn(sof, received)
        self.assertIn(eof, received)

        # Preamble/SOF/EOF remain unchanged
        expected_result = preamble + sof + "01100001 00000000 00000010 11000001 11000000 00100100" + eof
        expected_result2 = preamble + sof + "01010000 00000000 00000010 11000001 11000000 00100010" + eof

        decoded, err, _ = e.code_enocean(True, e.str2bit(received.replace(" ", "")))
        self.assertEqual(err, 0)
        reencoded, err, _ = e.code_enocean(False, decoded)
        self.assertEqual(err, 0)

        self.assertEqual(decoded, e.str2bit(expected_result.replace(" ", "")))
        self.assertEqual(reencoded, e.str2bit(received))

    def test_enocean_crc8_message(self):
        e = Encoding()
        received = util.hex2bit("aacbac4cddd5ddd3bddd5ddcc5ddcddd4c2d5d5c2cdddab200000")
        preamble, sof, eof = "aa", "9", "b"

        decoded, err, state = e.code_enocean(decoding=True, inpt=received)
        self.assertEqual(err, 0)
        self.assertEqual(state, e.ErrorState.SUCCESS)
        self.assertIn(preamble, util.bit2hex(decoded))
        self.assertIn(sof, util.bit2hex(decoded))
        self.assertIn(eof, util.bit2hex(decoded))

        reencoded, errors, state = e.code_enocean(decoding=False, inpt=decoded)
        self.assertEqual(errors, 0)
        self.assertEqual(state, e.ErrorState.SUCCESS)

        redecoded, errors, state = e.code_enocean(decoding=True, inpt=reencoded)
        self.assertEqual(errors, 0)
        self.assertEqual(state, e.ErrorState.SUCCESS)
        self.assertEqual(decoded, redecoded)

    def test_enocean_crc_polynomial(self):
        e = Encoding()

        msg1 = "aa9a6d201006401009802019e411e8035b"
        msg2 = "aa9a6d2010000ffdaaf01019e411e8071b"

        # Remove Preamble + SOF + EOF for CRC calculation
        msg1 = util.hex2bit("a6d201006401009802019e411e8035")
        crc1 = util.hex2bit("35")
        msg2 = util.hex2bit("a6d2010000ffdaaf01019e411e8071")
        crc2 = util.hex2bit("71")

        wsp_checker = WSPChecksum()
        calc_crc1 = wsp_checker.calculate(msg1)
        calc_crc2 = wsp_checker.calculate(msg2)
        self.assertTrue(calc_crc1 == crc1)
        self.assertTrue(calc_crc2 == crc2)

    def test_morse(self):
        e = Encoding()
        e.morse_low = 3
        e.morse_high = 5
        e.morse_wait = 1
        msg1 = "1111111000111100011111100100001111111111111111111111011"
        msg2 = "0111110111011111011101111101110"

        encoded = e.str2bit(msg1)
        compare = e.str2bit(msg2)
        decoded, err, _ = e.code_morse(decoding=True, inpt=encoded)
        reencoded, _, _ = e.code_morse(decoding=False, inpt=decoded)
        self.assertEqual(err, 1)
        self.assertEqual(reencoded, compare)

    def test_substitution(self):
        e = Encoding()
        e.src = [array.array("B", [True, True, True, False]), array.array("B", [True, False, False, False])]
        e.dst = [array.array("B", [True]), array.array("B", [False])]

        # encoded-string with 3 missing trailing zeroes
        encoded = e.str2bit(
            "1000111010001110111011101110111011101110100011101110111011101110111011101000100010001000100010001")
        compare = e.str2bit(
            "1000111010001110111011101110111011101110100011101110111011101110111011101000100010001000100010001000")
        decoded, err, _ = e.code_substitution(decoding=True, inpt=encoded)
        reencoded, _, _ = e.code_substitution(decoding=False, inpt=decoded)
        self.assertEqual(err, 3)
        self.assertEqual(reencoded, compare)

    def test_external(self):
        encoder = get_path_for_data_file("encode.py")
        decoder = get_path_for_data_file("decode.py")

        encoder = '{} "{}"'.format(sys.executable, encoder)
        decoder = '{} "{}"'.format(sys.executable, decoder)

        e = Encoding(["test external", settings.DECODING_EXTERNAL, decoder + ";" + encoder])

        data = array.array("B", [1, 0, 1, 0, 0, 1, 1])
        encoded = e.encode(data)
        self.assertEqual(encoded, array.array("B", [1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1]))

        decoded = e.decode(encoded)
        self.assertEqual(decoded, data)

    def test_external_in_dir_with_spaces(self):
        encoder = get_path_for_data_file("encode.py")
        decoder = get_path_for_data_file("decode.py")
        dir_with_spaces = os.path.join(tempfile.gettempdir(), "directory", "with space")

        os.makedirs(dir_with_spaces, exist_ok=True)

        encoder_in_dir_with_spaces = os.path.join(dir_with_spaces, "encode.py")
        decoder_in_dir_with_spaces = os.path.join(dir_with_spaces, "decode.py")

        shutil.copy(encoder, encoder_in_dir_with_spaces)
        shutil.copy(decoder, decoder_in_dir_with_spaces)

        encoder_in_dir_with_spaces = '{} "{}"'.format(sys.executable, encoder_in_dir_with_spaces)
        decoder_in_dir_with_spaces = '{} "{}"'.format(sys.executable, decoder_in_dir_with_spaces)

        e = Encoding(["test external with spaces", settings.DECODING_EXTERNAL,
                      decoder_in_dir_with_spaces + ";" + encoder_in_dir_with_spaces])

        data = array.array("B", [1, 0, 1, 0, 0, 1, 1])
        encoded = e.encode(data)
        self.assertEqual(encoded, array.array("B", [1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1]))

        decoded = e.decode(encoded)
        self.assertEqual(decoded, data)

    def test_external_with_arguments(self):
        code = get_path_for_data_file("code.py")
        encoder = get_path_for_data_file("encode.py")
        decoder = get_path_for_data_file("decode.py")
        dir_with_spaces = os.path.join(tempfile.gettempdir(), "directory", "with space")

        os.makedirs(dir_with_spaces, exist_ok=True)

        coder_in_dir_with_spaces = os.path.join(dir_with_spaces, "code.py")
        encoder_in_dir_with_spaces = os.path.join(dir_with_spaces, "encode.py")
        decoder_in_dir_with_spaces = os.path.join(dir_with_spaces, "decode.py")

        shutil.copy(code, coder_in_dir_with_spaces)
        shutil.copy(encoder, encoder_in_dir_with_spaces)
        shutil.copy(decoder, decoder_in_dir_with_spaces)

        coder_in_dir_with_spaces = '{} "{}"'.format(sys.executable, coder_in_dir_with_spaces)

        e = Encoding(["test external with spaces", settings.DECODING_EXTERNAL,
                      coder_in_dir_with_spaces + " d" + ";" + coder_in_dir_with_spaces + " e"])

        data = array.array("B", [1, 0, 1, 0, 0, 1, 1])
        encoded = e.encode(data)
        self.assertEqual(encoded, array.array("B", [1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1]))

        decoded = e.decode(encoded)
        self.assertEqual(decoded, data)

    def test_external_with_interpreter(self):
        code = get_path_for_data_file("code.py")
        encoder = get_path_for_data_file("encode.py")
        decoder = get_path_for_data_file("decode.py")
        dir_with_spaces = os.path.join(tempfile.gettempdir(), "directory", "with extra space")

        os.makedirs(dir_with_spaces, exist_ok=True)

        coder_in_dir_with_spaces = os.path.join(dir_with_spaces, "code.py")
        encoder_in_dir_with_spaces = os.path.join(dir_with_spaces, "encode.py")
        decoder_in_dir_with_spaces = os.path.join(dir_with_spaces, "decode.py")

        shutil.copy(code, coder_in_dir_with_spaces)
        shutil.copy(encoder, encoder_in_dir_with_spaces)
        shutil.copy(decoder, decoder_in_dir_with_spaces)

        coder_in_dir_with_spaces = '{} "{}"'.format(sys.executable, coder_in_dir_with_spaces)

        e = Encoding(["test external with spaces", settings.DECODING_EXTERNAL,
                      coder_in_dir_with_spaces + " d" + ";" + coder_in_dir_with_spaces + " e"])

        data = array.array("B", [1, 0, 1, 0, 0, 1, 1])
        encoded = e.encode(data)
        self.assertEqual(encoded, array.array("B", [1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1]))

        decoded = e.decode(encoded)
        self.assertEqual(decoded, data)

    def test_data_whitening(self):
        e = Encoding()
        nrz1 = util.string2bits("101010101010101010101010101010101110100111001010111010011100101011110011101011001001010011101110100011001011100111100111101011111110011100101001111111110011000111010000010111010101011100")
        nrz2 = util.string2bits("101010101010101010101010101010101110100111001010111010011100101011110001101011001011010000011101101101011101101110110011010010011010001010010010000101111001100111000100001001111110000000001000000010011")
        de_whitened1, err, _ = e.code_data_whitening(True, nrz1)  # Decoding
        de_whitened2, err, _ = e.code_data_whitening(True, nrz2)  # Decoding

        e.cc1101_overwrite_crc = False
        nrz1_, err, _ = e.code_data_whitening(False, de_whitened1)  # Encoding without overwriting CRC
        nrz2_, err, _ = e.code_data_whitening(False, de_whitened2)  # Encoding without overwriting CRC

        e.cc1101_overwrite_crc = True
        nrz1__, err, _ = e.code_data_whitening(False, de_whitened1)  # Encoding with overwriting CRC
        nrz2__, err, _ = e.code_data_whitening(False, de_whitened2)  # Encoding with overwriting CRC

        self.assertEqual(nrz1, nrz1_)
        self.assertEqual(nrz1, nrz1__)
        self.assertEqual(nrz2, nrz2_)
        self.assertEqual(nrz2, nrz2__)