#!/usr/bin/env python3
"""
Unit tests for file monitor module.
"""

import pytest
from sftp.file_monitor import FileMonitor


class TestFileMonitor:
    """Test FileMonitor functionality."""

    def test_parse_filename_valid(self):
        """Test parsing valid ACH filename."""
        filename = 'ACH_99944_05122025102947_001.txt'
        result = FileMonitor.parse_filename(filename)

        assert result['filename'] == 'ACH_99944_05122025102947_001.txt'
        assert result['branch'] == '99944'
        assert result['day'] == '05'
        assert result['month'] == '12'
        assert result['year'] == '2025'
        assert result['hour'] == '10'
        assert result['minute'] == '29'
        assert result['second'] == '47'
        assert result['sequence'] == '001'

    def test_parse_filename_another_date(self):
        """Test parsing filename with different date."""
        filename = 'ACH_12345_19012026103217_002.txt'
        result = FileMonitor.parse_filename(filename)

        assert result['branch'] == '12345'
        assert result['day'] == '19'
        assert result['month'] == '01'
        assert result['year'] == '2026'
        assert result['sequence'] == '002'
        assert result['timestamp'] == '19/01/2026 10:32:17'

    def test_parse_filename_invalid(self):
        """Test parsing invalid filename."""
        filename = 'invalid_filename.txt'
        result = FileMonitor.parse_filename(filename)

        assert result == {}

    def test_parse_filename_invalid_extension(self):
        """Test parsing filename with wrong extension."""
        filename = 'ACH_99944_05122025102947_001.csv'
        result = FileMonitor.parse_filename(filename)

        assert result == {}

    def test_parse_filename_missing_parts(self):
        """Test parsing filename with missing parts."""
        filename = 'ACH_99944_05122025_001.txt'  # Missing time parts
        result = FileMonitor.parse_filename(filename)

        assert result == {}


if __name__ == '__main__':
    pytest.main([__file__, '-v'])