#!@PYTHON@
# ^ python path substituted here is not depended-upon in Windows

import os, os.path, sys, platform

restart = 0

# This script launches ASCEND, after first ensuring that all necessary 
# variables are present in the 'environment', and adding them and 
# restarting the process if necessary. You can override values for these
# env vars by setting them before this script is run.

# Note that as well as env vars, ASCEND PyGTK is also controllable using the 
# .ascend.ini file in the user's home directory.

def path_absolute(p):
	"""utility function for dealing with paths on Mac platform."""
	if os.path.isabs(p):
		return p
	else:
		return os.path.join(sys.path[0],p)

if platform.system()=="Windows" and sys.executable.endswith("pythonw.exe"):
	_blackhole = file(os.devnull,"w")
	sys.stdout = sys.stderr = _blackhole

#-----------------------------------------------------------------------
# Get locations of the installed files. On windows, these are defined in
# in the registry. On other systems, these are defined at compile time
# by @VARNAME@ substitution.

SEP = ":"
PYTHON="@PYTHON@"
GTKLIBPATH = None # assume that GTK will be in the standard library path

if platform.system()=="Windows":
	SEP=";"
	LDPATHVAR = 'PATH'
	PYTHON=os.path.join(sys.prefix,"pythonw.exe")

	import _winreg as wreg
	k = wreg.OpenKey(wreg.HKEY_LOCAL_MACHINE, "SOFTWARE\ASCEND")

	# on Windows, we should be able to *assume* relative paths...

	# for some reason, QueryValue doesn't work on Py 2.4, need to use QueryValueEx.
	INSTALL_SOLVERS,t = wreg.QueryValueEx(k,"INSTALL_SOLVERS")
	INSTALL_MODELS,t = wreg.QueryValueEx(k,"INSTALL_MODELS")
	INSTALL_LIB,t = wreg.QueryValueEx(k,"INSTALL_LIB")
	INSTALL_ASCDATA,t = wreg.QueryValueEx(k,"INSTALL_ASCDATA")
	GTKLIBPATH,t = wreg.QueryValueEx(k,"GTKLIBS");
	DEFAULT_ASCENDLIBRARY="%s;%s" % (INSTALL_SOLVERS,INSTALL_MODELS)
	
	ASCEND_PYTHON = os.path.join(INSTALL_ASCDATA,"python")	
	PYVERSION = "@PYVERSION@"

elif platform.system()=="Darwin":

	LDPATHVAR = 'DYLD_LIBRARY_PATH'

	GTKLIBPATH=path_absolute("PyGTK.bundle/lib")

	INSTALL_LIB = path_absolute(".")
	INSTALL_ASCDATA = path_absolute("Resources")
	INSTALL_MODELS = path_absolute("""@ASC_LIBRARY_REL_DIST@""")
	INSTALL_SOLVERS = path_absolute("""@ASC_SOLVERS_REL_DIST@""")
	ASCEND_PYTHON = path_absolute("Python")
	DEFAULT_ASCENDLIBRARY="%s;%s" % (INSTALL_SOLVERS,INSTALL_MODELS)

	INSTALL_PYGTK = path_absolute("PyGTK.bundle/python")
	print("Adding %s to python path" % INSTALL_PYGTK)
	sys.path.insert(0,INSTALL_PYGTK)

else:
	LDPATHVAR = 'LD_LIBRARY_PATH'

	# FIXME for possible case of relative paths...

	INSTALL_LIB="@INSTALL_LIB@"
	INSTALL_ASCDATA="@INSTALL_ASCDATA@"
	INSTALL_MODELS = "@INSTALL_MODELS@"
	INSTALL_SOLVERS = "@INSTALL_SOLVERS@"
	ASCEND_PYTHON = "@INSTALL_PYTHON_ASCEND@"
	DEFAULT_ASCENDLIBRARY="""@DEFAULT_ASCENDLIBRARY@"""

#-----------------------------------------------------------------------

if os.environ.get(LDPATHVAR):
	LDPATH = os.environ.get(LDPATHVAR).split(SEP)
else:
	LDPATH = []

if not os.environ.get('ASC_GDB'):
	# restarting messes up GDB so don't allow it

	if platform.system()=="Windows":
		# Put INSTALL_LIB then GTK at start of path
		if GTKLIBPATH not in LDPATH:
			restart = 1
		if INSTALL_LIB not in LDPATH:
			restart = 1
		if GTKLIBPATH in LDPATH:
			LDPATH.remove(GTKLIBPATH)
		if GTKLIBPATH:
			LDPATH = [INSTALL_LIB,GTKLIBPATH] + LDPATH
		else:
			LDPATH = [INSTALL_LIB] + LDPATH
		os.environ[LDPATHVAR] = SEP.join(LDPATH)
	elif INSTALL_LIB != "/usr/lib" and not INSTALL_LIB in LDPATH:
		# don't worry about GTK location; just ensure that LDPATH includes INSTALL_LIB
		if GTKLIBPATH:
			LDPATH = [INSTALL_LIB,GTKLIBPATH] + LDPATH
		else:
			LDPATH = [INSTALL_LIB] + LDPATH
		os.environ[LDPATHVAR] = SEP.join(LDPATH)
		restart = 1

	if platform.system()=="Darwin":
		if not 'GTK_PATH' in os.environ:
			os.environ['XDG_DATA_HOME']=os.path.expanduser('~/.local/share')
#			os.environ['XDG_CONFIG_HOME']=os.path.expanduser('~/.config')
#			os.environ['XDG_CACHE_HOME']=os.path.expanduser('~/.cache')
#			os.environ['XDG_CONFIG_DIRS']='/sw/etc/xdg'
#			os.environ['XML_CATALOG_FILES']='/sw/etc/xml/catalog'
			os.environ['XDG_DATA_DIRS']="../PyGTK.bundle/share"

			bundle_res = os.path.normpath(path_absolute("../"))
			print("BUNDLE_RES =", bundle_res)
			bundle_etc = os.path.join(bundle_res,"etc")
			os.environ['GTK_DATA_PREFIX'] = bundle_res
			os.environ['GTK_EXE_PREFIX'] = bundle_res
			os.environ['GTK_PATH'] = bundle_res
			os.environ['GTK2_RC_FILES'] = os.path.join(bundle_etc,"gtk-2.0/gtkrc")
			os.environ['GTK_IM_MODULE_FILE']=os.path.join(bundle_etc,"gtk-2.0/gtk.immodules")
			os.environ['GTK_PIXBUF_MODULE_FILE']=os.path.join(bundle_etc,"gtk-2.0/gdk-pixbuf.loaders")
			#os.environ['PANGO_RC_FILE']=os.path.join(bundle_etc,"pango/pangorc")

			restart = 1

#		if not 'PWD' in os.environ:
#			os.environ['PWD']=os.path.dirname(sys.executable)
#			restart = 1
#
#		if not '_' in os.environ:
#			os.environ['_']=sys.executable
#			restart = 1

	# if ASCENDLIBRARY has been specified, make sure it's including the Model Library
	if os.environ.get('ASCENDLIBRARY') or platform.system()=="Darwin":
		if not 'ASCENDLIBRARY' in os.environ:
			os.environ['ASCENDLIBRARY'] = ""
		envmodels = [os.path.abspath(i) for i in os.environ['ASCENDLIBRARY'].split(SEP)]
		if not INSTALL_MODELS in envmodels:
			envmodels.append(INSTALL_MODELS)
			os.environ['ASCENDLIBRARY'] = SEP.join(envmodels)
			restart = 1

	# if ASCENDSOLVERS has been specified, make sure it includes the standard solvers	
	if os.environ.get('ASCENDSOLVERS') or platform.system()=="Darwin":
		if not 'ASCENDSOLVERS' in os.environ:
			os.environ['ASCENDSOLVERS'] = ""
		envsolvers = [os.path.abspath(i) for i in os.environ['ASCENDSOLVERS'].split(SEP)]
		if not INSTALL_SOLVERS in envsolvers:
			envsolvers.append(INSTALL_SOLVERS)
			os.environ['ASCENDSOLVERS'] = SEP.join(envsolvers)
			restart = 1

	# don't need to restart process on Windows as env vars update immediately
	if restart and platform.system()!="Windows":
		print("Restarting with corrected environment...")
		if os.environ.get(LDPATHVAR):
			print("   %s = %s" % (LDPATHVAR,os.environ.get(LDPATHVAR)))
		if os.environ.get('ASCENDLIBRARY'):
			print("   ASCENDLIBRARY = %s" % os.environ.get('ASCENDLIBRARY'))
		if os.environ.get('ASCENDSOLVERS'):
			print("   ASCENDSOLVERS = %s" % os.environ.get('ASCENDSOLVERS'))
		script = os.path.join(sys.path[0],"ascend")
		print("PYTHON =",PYTHON)
		print("script =",script)
		os.execve(PYTHON,[script] + sys.argv, os.environ)

print("Running with...")
print("   %s = %s" % (LDPATHVAR, os.environ.get(LDPATHVAR)))
print("   sys.path = %s" % sys.path)
print("   argv = %s" % sys.argv)
for e in os.environ:
	print("   %s = %s" % (e, os.environ[e]))

if os.environ.get('ASCENDLIBRARY'):
	ASCENDLIBRARY = os.environ.get('ASCENDLIBRARY')
	print("   ASCENDLIBRARY = %s" % ASCENDLIBRARY)

if os.environ.get('ASCENDSOLVERS'):
	ASCENDSOLVERS = os.environ.get('ASCENDSOLVERS')
	print("   ASCENDSOLVERS = %s" % ASCENDLIBRARY)

print("sys.path[0] = %s" % sys.path[0])

if not ASCEND_PYTHON in sys.path:
	print("Adding ASCEND_PYTHON=%s to python path" % ASCEND_PYTHON)
	sys.path.append(ASCEND_PYTHON)

if os.environ.get('OSTYPE')=='cygwin':
	print("CYGWIN...")
elif os.environ.get('OSTYPE')=='msys':
	print("MSYS...")

if os.environ.get('ASC_GDB'):
	args = sys.argv
	args.pop(0)
	cmd = ["gdb","--args","python",os.path.join(ASCEND_PYTHON,"gtkbrowser.py")]+args
	print(cmd)
	os.execv("/usr/bin/gdb",cmd)
else:
	import ascpy
	olddir = os.getcwd()
	print("CWD =",olddir)
	os.chdir(INSTALL_ASCDATA)
	from gtkbrowser import *
	os.chdir(olddir)
	B = Browser(
		librarypath=os.environ.get('ASCENDLIBRARY')
		,assetspath=os.path.join(INSTALL_ASCDATA,"glade")
	)
	B.run()