import sys, traceback, platform, re, commands

if __name__ != '__main__':
	from SCons.Script import *

import utils

# config = debug release
# aliases are going to be very needed here
# we have dependency situations too
# target = 

class Config:
	# not used atm, but useful to keep a list in mind
	# may use them eventually for the 'all' and other aliases expansions?
	target_choices = utils.Enum( 'radiant' )
	config_choices = utils.Enum( 'debug', 'release' )

	# aliases
	# 'all' -> for each choices
	# 'gamecode' for the targets, 'game' 'cgame' 'ui'
	
	def __init__( self ):
		# initialize defaults
		self.target_selected = [ 'radiant' ]
		self.config_selected = [ 'release' ]
		# those are global to each config
		self.cc = 'gcc-4.1'
		self.cxx = 'g++-4.1'

	def __repr__( self ):
		return 'config: target=%s config=%s' % ( self.target_selected, self.config_selected )

	def _processTarget( self, ops ):
		self.target_selected = ops

	def _processConfig( self, ops ):
		self.config_selected = ops

	def _processCC( self, ops ):
		self.cc = ops

	def _processCXX( self, ops ):
		self.cxx = ops

	def setupParser( self, operators ):
		operators['target'] = self._processTarget
		operators['config'] = self._processConfig
		operators['cc'] = self._processCC
		operators['cxx'] = self._processCXX

	def emit( self ):
		settings = self
		for config in self.config_selected:
			Export( 'utils', 'settings', 'config' )
			build_dir = os.path.join( 'build', config )
			BuildDir( build_dir, '.', duplicate = 0 )
			# left out jpeg6, splines
			lib_objects = []
			for project in [ 'libs/synapse/synapse.vcproj', 'libs/cmdlib/cmdlib.vcproj', 'libs/mathlib/mathlib.vcproj', 'libs/l_net/l_net.vcproj', 'libs/ddslib/ddslib.vcproj', 'libs/picomodel/picomodel.vcproj', 'libs/md5lib/md5lib.vcproj' ]:
				Export( 'project' )
				lib_objects += SConscript( os.path.join( build_dir, 'SConscript.lib' ) )
			Export( 'lib_objects' )
			SConscript( os.path.join( build_dir, 'SConscript.radiant' ) )

	def SetupEnvironment( self, env, config, useGtk = False, useGtkGL = False ):
		env['CC'] = self.cc
		env['CXX'] = self.cxx
		( ret, xml2 ) = commands.getstatusoutput( 'xml2-config --cflags' )
		if ( ret != 0 ):
			print 'xml2-config failed'
			assert( False )
		xml2libs = commands.getoutput( 'xml2-config --libs' )
		env.Append( LINKFLAGS = xml2libs.split( ' ' ) )
		baseflags = [ '-m32', '-pipe', '-Wall', '-fmessage-length=0', '-fvisibility=hidden', xml2.split( ' ' ) ]
		if ( useGtk ):
			( ret, gtk2 ) = commands.getstatusoutput( 'pkg-config gtk+-2.0 --cflags' )
			if ( ret != 0 ):
				print 'pkg-config gtk+-2.0 failed'
				assert( False )
			baseflags += gtk2.split( ' ' )
			gtk2libs = commands.getoutput( 'pkg-config gtk+-2.0 --libs' )
			env.Append( LINKFLAGS = gtk2libs.split( ' ' ) )
		else:
			( ret, glib ) = commands.getstatusoutput( 'pkg-config glib-2.0 --cflags' )
			if ( ret != 0 ):
				print 'pkg-config glib-2.0 failed'
				assert( False )
			baseflags += glib.split( ' ' )
		if ( useGtkGL ):
			( ret, gtkgl ) = commands.getstatusoutput( 'pkg-config gtkglext-1.0 --cflags' )
			if ( ret != 0 ):
				print 'pkg-config gtkglext-1.0 failed'
				assert( False )
			baseflags += gtkgl.split( ' ' )
			gtkgllibs = commands.getoutput( 'pkg-config gtkglext-1.0 --libs' )
			env.Append( LINKFLAGS = gtkgllibs.split( ' ' ) )
			
		env.Append( CFLAGS = baseflags )
		env.Append( CXXFLAGS = baseflags + [ '-fpermissive', '-fvisibility-inlines-hidden' ] )
		env.Append( CPPPATH = [ 'include', 'libs' ] )
		env.Append( CPPDEFINES = [ 'Q_NO_STLPORT' ] )
		if ( config == 'debug' ):
			env.Append( CFLAGS = [ '-g' ] )
			env.Append( CPPDEFINES = [ '_DEBUG' ] )				
		else:
			env.Append( CFLAGS = [ '-O3', '-march=pentium3', '-Winline', '-ffast-math', '-fno-unsafe-math-optimizations' ] )

# parse the config statement line to produce/update an existing config list
# the configs expose a list of keywords and accepted values, which the engine parses out 
class ConfigParser:
	def __init__( self ):
		self.operators = {}

	def _processOp( self, ops ):
		assert( len( ops ) == 1 )
		op = ops.pop()
		if ( op == 'clear' ):
			self.configs = []
			self.current_config = None
		elif ( op == 'pop' ):
			self.configs.pop()
			self.current_config = None
		elif ( op == 'push' ):
			self.configs.append( self.current_config )
			self.current_config = Config()
			self._setupParser( self.current_config )

	def _setupParser( self, c ):
		self.operators = { 'op' : self._processOp }
		c.setupParser( self.operators )

	def _parseStatement( self, s ):
		statement_re = re.compile( '(.*)=(.*)' )
		value_list_re = re.compile( '([^,]*),?' )
		if ( not statement_re.match( s ) ):
			print 'syntax error (statement match): %s' % repr( s )
			return
		statement_split = statement_re.split( s )
		if ( len( statement_split ) != 4 ):
			print 'syntax error (statement split): %s' % repr( s )
			return
		( foo, name, value, bar ) = statement_split
		value_split = value_list_re.split( value )
		if ( len( value_split ) < 2 or len( value_split ) % 2 != 1 ):
			print 'syntax error (value split): %s' % ( repr( value_split ) )
			return
		try:
			value_array = []
			value_split.reverse()
			value_split.pop()
			while ( len( value_split ) != 0 ):
				value_array.append( value_split.pop() )
				value_split.pop()					
		except:
			print traceback.print_exception( sys.exc_type, sys.exc_value, sys.exc_traceback )
			print 'syntax error (value to array): %s' % ( repr( value_split ) )
			return

		return ( name, value_array )		
	
	def parseStatements( self, _configs, statements ):
		self.current_config = None
		self.configs = _configs
		if ( self.configs is None ):
			self.configs = []
		for s in statements:

			if ( self.current_config is None ):
				# use a provided config, or create a default one
				if ( len( self.configs ) > 0 ):
					self.current_config = self.configs.pop()
				else:
					self.current_config = Config()
				# setup the operator table for this config
				# NOTE: have that in self._processOp too
				self._setupParser( self.current_config )
			
			ret = self._parseStatement( s )
			if ( ret is None ):
				print 'stop statement parse at %s' % repr( s )
				break
			( name, value_array ) = ret
			try:
				processor = self.operators[name]
			except:
				print 'unknown operator %s - stop statement parse at %s' % ( repr( name ), repr( s ) )
				break
			processor( value_array )

		if ( not self.current_config is None ):
			self.configs.append( self.current_config )
		# make sure there is at least one config
		if ( len( self.configs ) == 0 ):
			print 'pushing a default config'
			self.configs.append( Config() )
		return self.configs

import unittest

class TestConfigParse( unittest.TestCase ):

	def setUp( self ):
		self.parser = ConfigParser()

	def testBasicParse( self ):
		# test basic config parsing
		# needs to cleanly stop at the first config statement that is not recognized
		configs = self.parser.parseStatements( None, [ 'game=missionpack', 'config=qvm', 'foobar' ] )
		print repr( configs )

	def testMultiParse( self ):
		# multiple configs seperated by commas
		configs = self.parser.parseStatements( None, [ 'target=server,game,cgame' ] )
		print repr( configs )

	def testOp( self ):
		# test the operator for multiple configs
		configs = self.parser.parseStatements( None, [ 'target=core', 'config=release', 'op=push', 'target=game,cgame,ui', 'config=debug' ] )
		print repr( configs )

if __name__ == '__main__':
	unittest.main()