#!@PYTHON@
# to debug this program using 'gdb', invoke 'ASC_GDB=1 ascdev'.

import os.path, sys, platform;

def add_at_start(envvar,pathcomponents):
	"""
	Add path components at start of envvar, but only if they're not already in the path somewhere.
	@return 1 if changes made, 0 otherwise
	@TODO what about Windows path munging?
	"""

	# convert pathcomponents to absolute paths
	pathcomponents = [os.path.abspath(i) for i in pathcomponents]

	if not os.environ.get(envvar):
		# env var is not yet set; simply set it to requested value
		v = SEP.join(pathcomponents)
		print "CREATED %s=%s" % (envvar,v)
		os.environ[envvar]=v
		return 1

	changed = 0
	# convert what's in there to absolute paths for comparison
	envvals = [os.path.abspath(i) for i in os.environ[envvar].split(SEP)]
	oldenv = os.environ[envvar]
	found = []
	for p in reversed(pathcomponents):
		if p not in envvals:
			envvals.insert(0,p)
			print "INSERTED into %s: %s"%(envvar,p)
			changed = 1

	# TODO if changes made, let's check for repeated path components and remove them (PyGTK All-in-one does this)	
			
	os.environ[envvar]=SEP.join(envvals)
	if not changed:
		print "VAR %s UNCHANGED" % envvar
	else:
		print "VAR %s CHANGED" % envvar
		print "OLD %s = %s" % (envvar,oldenv)
		print "NEW %s = %s" % (envvar,os.environ[envvar])
		
	return changed
		
if __name__=='__main__':
	sourceroot="@SOURCE_ROOT@"
	script=os.path.join(sys.argv[0])

	if platform.system()=="Windows":
		LD_LIBRARY_PATH="PATH"
		SEP = ";"
	elif platform.system()=="Darwin":
		LD_LIBRARY_PATH="DYLD_LIBRARY_PATH"
		SEP = ":"
	else:
		LD_LIBRARY_PATH="LD_LIBRARY_PATH"
		SEP = ":"

	restart = []

	# for Mac, add our local PyGTK libraries at start of Python path:
	#if platform.system()=="Darwin":
	#	sys.path.insert(0,'dist/gtk.bundle/python')

	# ensure that we have our 'models' dir in the ASCENDLIBRARY path
	modeldirs = [os.path.join(sourceroot,"models")]
	if add_at_start('ASCENDLIBRARY',modeldirs):
		restart.append('ASCENDLIBRARY')

	solverdir = os.path.join(sourceroot,"solvers")
	solverdirs = [os.path.join(solverdir,d.lower()) for d in "@WITH_SOLVERS@".split(",")]
	if add_at_start('ASCENDSOLVERS',solverdirs):
		restart.append('ASCENDSOLVERS')

	# ensure that we have our shared libraries in the LD_LIBRARY_PATH
	libdirs = [sourceroot,os.path.join(sourceroot,"pygtk")]
	if add_at_start(LD_LIBRARY_PATH,libdirs):
		restart.append(LD_LIBRARY_PATH)

	# for bintoken compilation
	if add_at_start('ASCENDBTINC',[os.path.join(sourceroot)]):
		restart.append('ASCENDBTINC')
	if add_at_start('ASCENDBTLIB',[os.path.join(sourceroot)]):
		restart.append('ASCENDBTLIB')

	# ensure our pygtk dir is in the PYTHONPATH
	pypath = [os.path.join(sourceroot,"ascxx")]
	if add_at_start('PYTHONPATH',pypath):
		restart.append('PYTHONPATH')

	if restart:
		print "\nRestarting with..."
		for v in restart:
			print "   export %s=%s" % (v,os.environ[v])
		if os.environ.get('ASC_GDB'):
			print "   via GDB..."
			os.execvp("gdb",['--symbols=../@SHLIBPREFIX@ascend@SHLIBSUFFIX@','--args','@PYTHON@',script]+sys.argv[1:])
		else:
			print "PYTHON... ",script
			sys.stdout.flush() # needed for rxvt on Windows
			os.execvp('@PYTHON@',[script,script]+sys.argv[1:])
		# the above calls don't return so we can forget about line of enqiry


	print "\nRunning with..."
	for v in [LD_LIBRARY_PATH,'ASCENDLIBRARY','ASCENDSOLVERS','PYTHONPATH','PATH']:
		print "   %s = %s" % (v,os.environ[v])
	
	import ascpy
	from gtkbrowser import *
	assetspath = os.path.join(os.path.join(sourceroot,"pygtk"),"glade")
	print "ASSETS PATH = %s" % assetspath
	B = Browser(assetspath=assetspath)
	B.run()