#! @PYTHON@
# -*- coding: utf-8 -*-

"""iPyPS -- An enhanced Interactive Python front-end to PIPS

This is inspired by the ipython script to lauch iPyPs instead of iPython

Ronan.Keryell@hpc-project.com
"""

# The banner used for ipyps greeting
banner = """Welcome to iPyPS, the interactive Python PIPS environment shell

?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints more.

workspace -> the method to start with a PIPS workspace,
              a program database to work on;
module    -> to manipulate a PIPS module (a function, a procedure);
modules   -> to manipulate a set of PIPS modules.
%load     -> load and execute a PyPS file
"""


import sys

# Inject line arguments to set the default prompt to something with iPyPS:
# FC: strange, could not it be passed to the shell constructor somehow?
sys.argv[1:1] = [ '-prompt_in1', 'iPyPS [\#]: ']

# Load IPython, be compatible with several versions...

import IPython

# FC: Python philosophy about upward compatibility is a (very bad) joke:-(
#  - some updates to work with 2.7.6 & ipython 1.2.1
#  - whether it still work for others is an open question, I cannot test
#  - probably most of that is obsolete code…

if hasattr(IPython, 'ipapi'):
	# very very very old ipython
	ip = IPython.ipapi.get()
	register_line_magic = ip.expose_magic
else:
	if hasattr(IPython, 'Shell'):
		# very very old ipython
		from IPython.Shell import IPShellEmbed as IPShell
		# use a dictionary to match the parameter name change
		shell_params = { 'banner' : banner }
	elif hasattr(IPython, 'frontend'):
		# very old ipython
		from IPython.frontend.terminal.embed \
			import InteractiveShellEmbed as IPShell
		shell_params = { 'banner1' : banner }
	else: # no 'frontend'
		# quite old ipython?
		from IPython.terminal.embed import InteractiveShellEmbed as IPShell
            
		shell_params = { 'banner1' : banner }
	ip = IPShell(**shell_params)
	if hasattr(ip, 'define_magic'):
		register_line_magic = ip.define_magic
	else:
		from IPython.core.magic import register_line_magic

# Load PyPS:
from pyps import *

# Create an embedded shell to inherit pyps current namespace into the
# interactive one. I guess there is a more direct way...
@register_line_magic
def load_pyps(self, filename):
    "Load and execute a PyPS file"
    try:
        exec(open(filename).read())
    # To avoid crashing iPython if something goes wrong:
    except:
        # We cannot get the exception because of 2.5 compliancy:
        print("Error while loading PyPS file '%s'" % filename)

# Call the iPython shell itself:
ip()