#! /usr/bin/env python
"""Script to generate the raw sub-package APIs

Basically just drives OpenGLGenerator with options to produce
the various modules we want...
"""
import os, sys, logging, re, compileall
import openglgenerator
from OpenGL import platform
try:
	from OpenGL import GL
except (ImportError, AttributeError), err:
	pass

# put our OpenGL directory on the search path, just in case...
sys.path.insert( 0, os.path.abspath( '..' ) )

log = logging.getLogger( 'generateraw' )

MODULE_DEFINITIONS = [
	('GL', ('gl[A-Z0-9].*','GL_.*')),
	('GLU',('glu[A-Z0-9].*','GLU[_a-z0-9].*')),
	('GLUT', ('glut[A-Z0-9].*','GLUT[_a-z0-9].*')),
	('GLE', None),
	('GLX', None),
	('WGL', ('wgl.*','WGL.*',),
	('AGL', None),
]
def filterModules( arguments ):
	"""Filter the set of modules according to command-line options

	Basically no args == do everything, otherwise only process modules
	declared here...
	"""
	if arguments:
		definitions = [
			x for x in MODULE_DEFINITIONS
			if x[0] in arguments
		]
	else:
		definitions = MODULE_DEFINITIONS
	return definitions

def main():
	baseModules = [
		'OpenGL.constants',
	]
	known_symbols = openglgenerator.OpenGLGenerator.loadKnownSymbols( 
		baseModules 
	)
	definedSymbols = known_symbols.copy()
	for (module,expressions) in filterModules( sys.argv[1:] ):
		log.info( "Processing module: %s", module )
		if expressions:
			expressions = [re.compile(e) for e in expressions]
		xmlFile = '%s.xml'%( module.lower(), )
		directory = '../OpenGL/raw/%(module)s'%locals()
		try:
			os.makedirs( directory )
		except OSError, err:
			pass
		constantsFile = os.path.join( directory, 'constants.py' )
		rawFile = os.path.join( directory, '__init__.py' )
		open( rawFile, 'w' ).close()
		annotationsFile = os.path.join( directory, 'annotations.py' )
		dll = getattr( platform, module, None )
		if dll and os.path.isfile( xmlFile ):
			log.info( "Found DLL: %s and have XML source file: %s", dll, xmlFile )
			# first the constants file...
			log.info( "Generating constants %s", constantsFile )
			gen = openglgenerator.OpenGLGenerator(
				open(constantsFile,'w'),
				generate_comments = False,
				searched_dlls = [ dll ],
				known_symbols = definedSymbols,
				module_header = '''"""Constants for OpenGL.%(module)s

Automatically generated by the generateraw script, do not edit!
"""
'''%locals(),
			)
			items = gen.load_typedefs( xmlFile , types = [
				openglgenerator.codegenerator.typedesc.Variable, # ick!
			], expressions = expressions)
			gen.produce( items )
			gen.output.close()
			
			log.info( "Generating raw API %s", rawFile )
			constantSymbols = gen.loadKnownSymbols( 
				['OpenGL.raw.%(module)s.constants'%locals()], 
				flags = gen.EXPORT_SYMBOL, # don't import, do export
				doReload = True,
			)
			constantSymbols.update( definedSymbols )
			constantSymbols.update( known_symbols )
			gen = openglgenerator.OpenGLGenerator(
				open(rawFile,'w'),
				generate_comments = True,
				searched_dlls = [ dll ],
				known_symbols = constantSymbols,
				module_header = '''# -*- coding: iso-8859-1 -*-
"""Raw (C-style) API for OpenGL.%(module)s

Automatically generated by the generateraw script, do not edit!
"""
from OpenGL.raw.%(module)s.constants import *
'''%locals(),
			)
			items = gen.load_typedefs( xmlFile, expressions = expressions )
			gen.produce( items )
			gen.output.close()

			log.info( "Generating annotations %s", annotationsFile )
			gen = openglgenerator.OpenGLGenerator(
				open(annotationsFile,'w'),
				generate_comments = True,
				searched_dlls = [ dll ],
				emitters = [ openglgenerator.OpenGLDecorator() ],
				known_symbols = definedSymbols,
				module_header = '''"""Array-size annotations for OpenGL.raw.%(module)s

Automatically generated by the generateraw script, do not edit!
"""
from OpenGL.raw import %(module)s as raw
'''%locals(),
			)
			items = gen.load_typedefs( xmlFile, types = [
				openglgenerator.codegenerator.typedesc.Function, # ick!
			], expressions = expressions)
			gen.produce( items )
			gen.output.close()

			log.info( """Suppressing future output of already-defined functions/structures: %s""", module )
			definedSymbols.update( 
				gen.loadKnownSymbols( 
					['OpenGL.raw.%(module)s'%locals()], 
					flags = 0, # neither import nor export from future operations...
					doReload = True,
				)
			)
			definedSymbols.update( 
				gen.loadKnownSymbols( 
					['OpenGL.raw.%(module)s.constants'%locals()], 
					flags = 0, # suppress future export of the constants
					doReload = True,
				) 
			)
			definedSymbols.update( known_symbols )
			if module == 'GL':
				# filter out the higher GL version stuff as well...
				# obviously you need to have the version stuff generated already 
				# to make this work!
				for version in ('1_2','1_3','1_4','1_5','2_0'):
					log.info( 'Suppressing exports from Core GL Version %s', version )
					definedSymbols.update( 
						gen.loadKnownSymbols( 
							['OpenGL.raw.GL.VERSION.GL_%(version)s'%locals()], 
							flags = 0, # suppress future export of the constants
							doReload = True,
						) 
					)
			path = '../OpenGL/raw/%(module)s'%locals()
			log.info( 'Forcing recompilation of %s', path )
			compileall.compile_dir(path, maxlevels=2, force=True, quiet=True)
	

if __name__ == "__main__":
	logging.basicConfig()
	#logging.getLogger( 'codegenerator' ).setLevel( logging.DEBUG )
	log.setLevel( logging.INFO )
	main()