import os
import sys
import re
import datetime
import string

from scriptCommon import catchPath

versionParser = re.compile( r'(\s*Version\slibraryVersion)\s*\(\s*(.*)\s*,\s*(.*)\s*,\s*(.*)\s*,\s*\"(.*)\"\s*\).*' )
includesParser = re.compile( r'\s*#include\s*"(.*)"' )
guardParser = re.compile( r'\s*#.*_INCLUDED')
defineParser = re.compile( r'\s*#define')
ifParser = re.compile( r'\s*#if')
endIfParser = re.compile( r'\s*#endif')
ifImplParser = re.compile( r'\s*#if.*(CATCH_CONFIG_MAIN|CATCH_CONFIG_RUNNER)')
commentParser1 = re.compile( r'^\s*/\*')
commentParser2 = re.compile( r'^\s*\*')
blankParser = re.compile( r'^\s*$')
seenHeaders = set([])
rootPath = os.path.join( catchPath, 'include/' )
versionPath = os.path.join( rootPath, "internal/catch_version.hpp" )
readmePath = os.path.join( catchPath, "README.md" )
outputPath = os.path.join( catchPath, 'single_include/catch.hpp' )

bumpVersion = True
includeImpl = True

for arg in sys.argv[1:]:
	arg = string.lower(arg)
	if arg == "nobump":
		bumpVersion = False
		print "Not bumping version number"
	elif arg == "noimpl":
		includeImpl = False
		bumpVersion = False
		print "Not including impl code (and not bumping version)"
	else:
		print "\n** Unrecognised argument: " + arg + " **\n"
		exit(1)

out = open( outputPath, 'w' )
ifdefs = 0
implIfDefs = -1

def write( line ):
	if includeImpl or implIfDefs == -1:
		out.write( line )

def parseFile( path, filename ):
	global ifdefs
	global implIfDefs

	f = open( path + filename, 'r' )
	blanks = 0
	for line in f:
		if ifParser.match( line ):
			ifdefs = ifdefs + 1
		elif endIfParser.match( line ):
			ifdefs = ifdefs - 1
		m = includesParser.match( line )
		if m:
			header = m.group(1)
			headerPath, sep, headerFile = header.rpartition( "/" )
			if not headerFile in seenHeaders:
				seenHeaders.add( headerFile )
				write( "// #included from: {0}\n".format( header ) )
				if( headerPath == "internal" and path.endswith( "internal/" ) ):
					headerPath = ""
					sep = ""
				if os.path.exists( path + headerPath + sep + headerFile ):
					parseFile( path + headerPath + sep, headerFile )
				else:
					parseFile( rootPath + headerPath + sep, headerFile )
		elif ifImplParser.match(line):
			implIfDefs = ifdefs
		elif (not guardParser.match( line ) or defineParser.match( line ) ) and not commentParser1.match( line )and not commentParser2.match( line ):
			if blankParser.match( line ):
				blanks = blanks + 1
			else:
				blanks = 0
			if blanks < 2:
				write( line.rstrip() + "\n" )

class Version:
	def __init__(self):
		f = open( versionPath, 'r' )
		for line in f:
			m = versionParser.match( line )
			if m:
				self.variableDecl = m.group(1)
				self.majorVersion = int(m.group(2))
				self.minorVersion = int(m.group(3))
				self.buildNumber = int(m.group(4))
				self.branchName = m.group(5)
		f.close()

	def incrementBuildNumber(self):
		self.buildNumber = self.buildNumber+1

	def updateVersionFile(self):
		f = open( versionPath, 'r' )
		lines = []
		for line in f:
			m = versionParser.match( line )
			if m:
				lines.append( '{0}( {1}, {2}, {3}, "{4}" );'.format( self.variableDecl, self.majorVersion, self.minorVersion, self.buildNumber, self.branchName ) )
			else:
				lines.append( line.rstrip() )
		f.close()
		f = open( versionPath, 'w' )
		for line in lines:
			f.write( line + "\n" )

	def updateReadmeFile(self):
		f = open( readmePath, 'r' )
		lines = []
		for line in f:
			lines.append( line.rstrip() )
		f.close()
		f = open( readmePath, 'w' )
		for line in lines:
			if line.startswith( "*v" ):
				f.write( '*v{0}.{1} build {2} ({3} branch)*\n'.format( self.majorVersion, self.minorVersion, self.buildNumber, self.branchName ) )
			else:
				f.write( line + "\n" )

def generateSingleInclude():
	v = Version()
	if bumpVersion:
		v.incrementBuildNumber()
		v.updateVersionFile()
		v.updateReadmeFile()
	out.write( "/*\n" )
	out.write( " *  CATCH v{0}.{1} build {2} ({3} branch)\n".format( v.majorVersion, v.minorVersion, v.buildNumber, v.branchName ) )
	out.write( " *  Generated: {0}\n".format( datetime.datetime.now() ) )
	out.write( " *  ----------------------------------------------------------\n" )
	out.write( " *  This file has been merged from multiple headers. Please don't edit it directly\n" )
	out.write( " *  Copyright (c) 2012 Two Blue Cubes Ltd. All rights reserved.\n" )
	out.write( " *\n" )
	out.write( " *  Distributed under the Boost Software License, Version 1.0. (See accompanying\n" )
	out.write( " *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)\n" )
	out.write( " */\n" )
	out.write( "#ifndef TWOBLUECUBES_SINGLE_INCLUDE_CATCH_HPP_INCLUDED\n" )
	out.write( "#define TWOBLUECUBES_SINGLE_INCLUDE_CATCH_HPP_INCLUDED\n" )
	
	parseFile( rootPath, 'catch.hpp' )
	
	out.write( "#endif // TWOBLUECUBES_SINGLE_INCLUDE_CATCH_HPP_INCLUDED\n\n" )

generateSingleInclude()