from genesis.parsers.sheet_nature import SheetNature, classify_sheet, find_header_row


def test_table_detection():
    m = [["機能ID", "機能名"], ["A001", "社員登録"], ["A002", "退職処理"]]
    assert classify_sheet(m) == SheetNature.TABLE


def test_free_text_single_col():
    m = [["新入社員を登録できる。"], ["氏名・所属・入社日を入力する。"]]
    assert classify_sheet(m) == SheetNature.FREE_TEXT


def test_free_text_many_empty_rows():
    m = [["要求A"], [], [], [], ["要求B"]]
    assert classify_sheet(m) == SheetNature.FREE_TEXT


def test_header_row_index():
    m = [["機能ID", "名前"], ["1", "田中"]]
    assert find_header_row(m) == 0
    assert find_header_row([["自由テキスト"]]) == -1


def test_classify_sheet_mixed_with_bullet_line():
    m = [["ID", "名前"], ["1", "田中"], ["・備考行"]]
    assert classify_sheet(m) == SheetNature.MIXED


def test_classify_sheet_mixed_with_square_line():
    m = [["ID", "名前"], ["1", "田中"], ["■備考行"]]
    assert classify_sheet(m) == SheetNature.MIXED


def test_classify_empty_matrix_is_free_text():
    # 空矩阵：_free_text_like 对空矩阵返回 True（L26 分支）
    assert classify_sheet([]) == SheetNature.FREE_TEXT


def test_classify_sparse_multicol_is_free_text():
    # 多列但非空行占比 < 0.7 → FREE_TEXT（L32 稀疏分支）
    m = [["ID", "名前"], [], [], [], [], ["1", "田中"]]
    assert classify_sheet(m) == SheetNature.FREE_TEXT


def test_classify_header_no_bullet_is_table():
    # 表头有效且无 ・/■ 行 → 落入 TABLE（L40→44 无匹配循环路径）
    m = [["ID", "名前"], ["1", "田中"], ["2", "佐藤"]]
    assert classify_sheet(m) == SheetNature.TABLE