import cmor
import numpy
import cdtime


def cmor_initialisation():
    cmor.setup(inpath='/git/cmip5-cmor-tables/Tables',
               netcdf_file_action=cmor.CMOR_REPLACE_3,
               create_subdirectories=0)
    cmor.dataset('pre-industrial control', 'ukmo', 'HadCM3', '360_day',
                 institute_id='ukmo',
                 model_id='HadCM3',
                 history='some global history',
                 forcing='N/A',
                 parent_experiment_id='N/A',
                 parent_experiment_rip='N/A',
                 branch_time=0.,
                 contact='bob',
                 outpath='./out')


def setup_data():
    axes = [{'table_entry': 'time1',
             'units': 'days since 2000-01-01 00:00:00',
             },
            {'table_entry': 'site',
             'units': '',
             'coord_vals': [0]},
            {'table_entry': 'hybrid_height',
             'units': 'm',
             'coord_vals': range(2),
             'cell_bounds': [[x - 0.5, x + 0.5] for x in range(2)],
             },
            ]

    values = numpy.array([0.5, 0.5], numpy.float32)
    return values, axes


def cmor_define_and_write(values, axes):
    table = 'CMIP5_cfSites'
    cmor.load_table(table)

    axis_ids = list()
    for axis in axes:
        axis_id = cmor.axis(**axis)
        axis_ids.append(axis_id)

    igrid = cmor.grid([axis_ids[1]], [0.], [0.])
    cmor.zfactor(axis_ids[2], 'b', axis_ids=[axis_ids[2]],
                 zfactor_values=range(2),
                 zfactor_bounds=[[x - 0.5, x + 0.5] for x in range(2)])

    cmor.zfactor(axis_ids[2], 'orog', 'm', axis_ids=[igrid],
                 zfactor_values=[0])

    ids_for_var = [axis_ids[0], igrid, axis_ids[2]]
    varid = cmor.variable('tnhus',
                          's-1',
                          ids_for_var,
                          history='variable history',
                          missing_value=-99,
                          )

    for time in [x * 1800. / 86400 for x in range(48)]:
        time += 1. / 3600. / 24.
        tr = cdtime.reltime(time, axes[0]["units"])
        print("Writing: %.03f" % time, "|", tr.tocomp(cdtime.Calendar360), "|", tr.tocomp())
        cmor.write(varid, values, time_vals=[time])
    return varid


def main():

    cmor_initialisation()
    values, axes = setup_data()
    varid = cmor_define_and_write(values, axes)
    fname = cmor.close(varid, file_name=True)
    print("Done:", fname)


if __name__ == '__main__':

    main()
