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()