import numpy as np
import pytest

from pandas import DataFrame, Index, MultiIndex
from pandas.util import testing as tm


@pytest.fixture
def multiindex_dataframe_random_data():
    """DataFrame with 2 level MultiIndex with random data"""
    index = MultiIndex(levels=[['foo', 'bar', 'baz', 'qux'], ['one', 'two',
                                                              'three']],
                       codes=[[0, 0, 0, 1, 1, 2, 2, 3, 3, 3],
                              [0, 1, 2, 0, 1, 1, 2, 0, 1, 2]],
                       names=['first', 'second'])
    return DataFrame(np.random.randn(10, 3), index=index,
                     columns=Index(['A', 'B', 'C'], name='exp'))


@pytest.fixture
def multiindex_year_month_day_dataframe_random_data():
    """DataFrame with 3 level MultiIndex (year, month, day) covering
    first 100 business days from 2000-01-01 with random data"""
    tdf = tm.makeTimeDataFrame(100)
    ymd = tdf.groupby([lambda x: x.year, lambda x: x.month,
                       lambda x: x.day]).sum()
    # use Int64Index, to make sure things work
    ymd.index.set_levels([lev.astype('i8') for lev in ymd.index.levels],
                         inplace=True)
    ymd.index.set_names(['year', 'month', 'day'], inplace=True)
    return ymd