import pytest


def test_check_table_header_raises_error():
    from superx_budget.budget import ExcelRow, _check_table_header
    from superx_budget.exceptions import BudgetParserError

    row = ExcelRow(None, ["not", "the", "expected", "row", None, 0])

    with pytest.raises(BudgetParserError):
        _check_table_header(row)


def test_skip_empty_lines():
    from superx_budget.budget import ExcelRow, _skip_empty_lines

    rows = [
        ExcelRow(0, [""]),
        ExcelRow(1, ["one"]),
        ExcelRow(2, [None]),
        ExcelRow(3, [""]),
        ExcelRow(4, ["two"]),
        ExcelRow(5, [""]),
    ]

    result = _skip_empty_lines(rows)

    assert list(result) == [(1, ["one"]), (4, ["two"])]


def test_parse_data_table():
    from superx_budget.budget import ExcelRow, _parse_data_table

    rows = [
        ExcelRow(2, list("ABCDEFGH")),
        ExcelRow(3, [None for i in range(8)]),
        ExcelRow(4, list("stuvwxyzX")),  # one item more
    ]

    result = _parse_data_table(rows)
    first, last = list(result)

    assert first.row == 2
    assert first.number == "A"
    assert first.rest == "H"
    assert last.row == 4
    assert last.number == "s"
    assert last.rest == "z"


def test_parse_budget_data(budget_example_sheet):
    from superx_budget.budget import parse_budget_data

    result = parse_budget_data(budget_example_sheet)
    first, last = result[0], result[-1]

    assert len(result) == 20
    assert first.row == 3
    assert first.number == 1
    assert first.project_name == "Safeguard IV"
    assert first.rest == "=F3-G3"
    assert last.row == 61


def test_parse_budget_file(budget_example_file):
    from superx_budget.budget import parse_budget_file

    result = parse_budget_file(budget_example_file)
    first = result[0]

    assert len(result) == 20
    assert first.row == 3
    assert first.number == 1
    assert first.project_name == "Safeguard IV"
    assert first.rest == "=F3-G3"