#!/usr/bin/env python3
# vim: fdm=indent ts=4

import h5py
import matplotlib.pyplot as plt
import numpy as np

import aa_generate_beacon as beacon
import lib

if __name__ == "__main__":
    from os import path
    import sys

    fname = "ZH_airshower/mysim.sry"

    ####
    fname_dir = path.dirname(fname)
    antennas_fname = path.join(fname_dir, beacon.antennas_fname)

    if not path.isfile(antennas_fname):
        print("Antenna file cannot be found, did you try generating a beacon?")
        sys.exit(1)

    # Read in antennas from file
    f_beacon, tx, antennas = beacon.read_beacon_hdf5(antennas_fname)

    if True and 'beacon_phase_true' in antennas[0].attrs:
        true_phases = np.array([a.attrs['beacon_phase_true'] for a in antennas])
    else:
        true_phases = np.empty( (len(antennas)) )

        for i, ant in enumerate(antennas):
            measured_phase = ant.attrs['beacon_phase_measured']

            geom_time = lib.geometry_time(tx, ant, c_light=3e8*1e-9)
            geom_phase = geom_time * 2*np.pi*f_beacon

            true_phases[i] = lib.phase_mod(measured_phase) - lib.phase_mod(geom_phase)

            ant.attrs['beacon_phase_true'] = true_phases[i]

    # True phase (without geometry determined)

    if True: # show antenna phases
        fig, ax = plt.subplots()
        spatial_unit=None
        fig.suptitle('f= {:2.0f}MHz'.format(f_beacon*1e3))

        antenna_locs = list(zip(*[(ant.x, ant.y) for ant in antennas]))
        ax.set_xlabel('x' if spatial_unit is None else 'x [{}]'.format(spatial_unit))
        ax.set_ylabel('y' if spatial_unit is None else 'y [{}]'.format(spatial_unit))
        scatter_kwargs = {}
        scatter_kwargs['cmap'] = 'Spectral_r'
        scatter_kwargs['vmin'] = -np.pi
        scatter_kwargs['vmax'] = +np.pi
        color_label='$\\varphi$'

        sc = ax.scatter(*antenna_locs, c=true_phases, **scatter_kwargs)
        fig.colorbar(sc, ax=ax, label=color_label)

    plt.show()
    # Report back to CLI
    #print("Period Multiples resolved in", antenna_fname)