import pytest
import sys
import os
sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
from slic.utils.channels import *
from unittest.mock import patch 

import tempfile
import warnings


CHANNELS_FILE_TEXT_1 = """\
# Main experiment channels
channel_1
channel_2   # analog input
chan ne ls_3

another : channel_6

channel_1   # duplicate, should be ignored
   CHN_LS4
# channel_5 is deprecated
"""

CHANNELS_FILE_TEXT_2 = """\
# Additional DAQ channels with edge cases
   channel_6
channel_7#commented_inline
channel_8    # this is a valid channel
channel_6
# All lines after are comments only
#
  # fully commented out
channel_9

# Special cases: whitespace, tabs, upper/lower
  CHANNEL_10
\tchannel_11
"""

# ----------- TESTS ------------

def test_load_channels_and_channels_class_with_professional_names():

    test_cases = [
        (CHANNELS_FILE_TEXT_1, ['CHN_LS4', 'another : channel_6', 'chan ne ls_3', 'channel_1', 'channel_2']),
        (CHANNELS_FILE_TEXT_2, [
            'CHANNEL_10',
            'channel_11',
            'channel_6',
            'channel_7',
            'channel_8',
            'channel_9',
        ]),
    ]
    for file_text, expected in test_cases:
        with tempfile.NamedTemporaryFile('w+', delete=False) as tmpfile:
            tmpfile.write(file_text)
            tmpfile_path = tmpfile.name
        try:
            # Test load_channels function
            result_func = load_channels(tmpfile_path)
            assert result_func == expected

            # Test Channels class : including DeprecationWarning
            with warnings.catch_warnings(record=True) as w:
                warnings.simplefilter("always")
                result_class = Channels(tmpfile_path)
                assert list(result_class) == expected
                dep_warnings = [warn for warn in w if issubclass(warn.category, DeprecationWarning)]
                assert len(dep_warnings) == 1
        finally:
            os.remove(tmpfile_path)