#!/usr/bin/env python3
import sys
import os
import pathlib
import matplotlib.pyplot as plt

cwd = pathlib.Path( os.getcwd() )
data_path = cwd.joinpath( 'data.py' )
expected_path = cwd.joinpath( sys.argv[ 1 ] )

if sys.version_info >= ( 3, 6 ):
    from importlib.machinery import SourceFileLoader
    data = SourceFileLoader( 'data', str( data_path ) ).load_module()
    expected = SourceFileLoader( 'expected', str( expected_path ) ).load_module()

elif sys.version_info >= ( 2, 7 ):
    import imp
    data = imp.load_source( 'data', str( data_path ) )
    expected = imp.load_source( 'expected', str( expected_path ) )
else:
    sys.stderr.write( 'Error: python version ' + sys.version + ' not supported!\n')
    exit( -1 );


if ( len( sys.argv ) != 2 ):
    raise( "Usage: {} expected_data.py" )

time_expected = [ i * expected.interval for i in range( len( expected.data ) ) ]
time_actual = [ i * expected.interval for i in range( len( data.float_data ) ) ]

plt.title( expected.title )
plt.plot( time_expected, expected.data, color = 'orange', label = 'expected' )
plt.plot( time_actual, data.float_data, color = 'cornflowerblue', label = 'actual' )
plt.ylabel( 'y' )
plt.xlabel( expected.xlabel )
plt.legend( bbox_to_anchor = ( 0.9, 1.05 ), ncol = 2 )
plt.show()