import unittest
from types import SimpleNamespace

from tools.convert_salary_excel import detect_column_type, parse_sheet


class FakeWorksheet:
    title = "Sheet1"

    def __init__(self, rows):
        self.rows = rows

    def iter_rows(self, min_row=1, max_row=None, values_only=False):
        rows = self.rows[min_row - 1:max_row]
        for row in rows:
            if values_only:
                yield row
            else:
                yield [SimpleNamespace(value=value) for value in row]

    def __getitem__(self, row_number):
        return [SimpleNamespace(value=value) for value in self.rows[row_number - 1]]


class DetectColumnTypeTests(unittest.TestCase):
    def test_index_headers_are_not_misclassified_as_count(self):
        for header in ("Index", "Salary Index", "Engineering Index", "Median salary"):
            with self.subTest(header=header):
                self.assertEqual(detect_column_type(header), "index")

    def test_single_letter_n_only_matches_as_a_token(self):
        self.assertEqual(detect_column_type("Employee n"), "count")
        self.assertEqual(detect_column_type("Engineering"), None)

    def test_count_headers_still_match_common_labels(self):
        for header in ("Count", "Engineering Count", "Antal medarbejdere"):
            with self.subTest(header=header):
                self.assertEqual(detect_column_type(header), "count")

    def test_parse_sheet_preserves_category_name_with_letter_n(self):
        ws = FakeWorksheet([
            ("Company", "Engineering Count", "Engineering Index"),
            ("Example Corp", 12, 105.5),
        ])

        companies = parse_sheet(ws)

        self.assertEqual(companies[0]["categories"]["engineering"], {"count": 12, "index": 105.5})


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