from __future__ import absolute_import, division, print_function

import numpy as np

import xarray as xr

from . import requires_dask


class Reindex(object):
    def setup(self):
        data = np.random.RandomState(0).randn(1000, 100, 100)
        self.ds = xr.Dataset({'temperature': (('time', 'x', 'y'), data)},
                             coords={'time': np.arange(1000),
                                     'x': np.arange(100),
                                     'y': np.arange(100)})

    def time_1d_coarse(self):
        self.ds.reindex(time=np.arange(0, 1000, 5)).load()

    def time_1d_fine_all_found(self):
        self.ds.reindex(time=np.arange(0, 1000, 0.5), method='nearest').load()

    def time_1d_fine_some_missing(self):
        self.ds.reindex(time=np.arange(0, 1000, 0.5), method='nearest',
                        tolerance=0.1).load()

    def time_2d_coarse(self):
        self.ds.reindex(x=np.arange(0, 100, 2), y=np.arange(0, 100, 2)).load()

    def time_2d_fine_all_found(self):
        self.ds.reindex(x=np.arange(0, 100, 0.5), y=np.arange(0, 100, 0.5),
                        method='nearest').load()

    def time_2d_fine_some_missing(self):
        self.ds.reindex(x=np.arange(0, 100, 0.5), y=np.arange(0, 100, 0.5),
                        method='nearest', tolerance=0.1).load()


class ReindexDask(Reindex):
    def setup(self):
        requires_dask()
        super(ReindexDask, self).setup()
        self.ds = self.ds.chunk({'time': 100})