#! /usr/bin/env python
# encoding: utf-8
# mittorn, 2018

from waflib import Logs
import os

top = '.'

def options(opt):
	grp = opt.add_option_group('ref_vk options')

	grp.add_option('--disable-vulkan', action='store_false', dest='VK', default=True,
		help = 'disable vulkan [default: %default]')

	grp.add_option('--aftermath', action='store', dest = 'NSIGHT_AFTERMATH_SDK', default = None,
		help = 'path to Nvidia Nsight Aftermath SDK (optional) [default: %default]')

def configure(conf):
	# check for dedicated server build
	if conf.options.DEDICATED:
		return

	conf.env.VK = conf.options.VK

	if not conf.env.VK:
		return

	if conf.env.DEST_OS == 'win32':
		conf.start_msg('Vulkan SDK available?')
		if not 'VULKAN_SDK' in conf.environ:
			conf.error('VULKAN_SDK environment variable is not available, ref_vk will not be built')
			conf.end_msg('no')
		conf.env.VULKAN_SDK = conf.environ['VULKAN_SDK']
		if not os.path.isdir(conf.env.VULKAN_SDK):
			conf.error(conf.env.VULKAN_SDK + ' is not a valid directory')
		conf.end_msg('found at ' + conf.env.VULKAN_SDK)

	conf.load('glslc')

	conf.define('REF_DLL', 1)

	if conf.options.NSIGHT_AFTERMATH_SDK:
		conf.start_msg('Nvidia Nsight Aftermath SDK')
		conf.env.HAVE_AFTERMATH = 1
		path = conf.options.NSIGHT_AFTERMATH_SDK
		conf.env.INCLUDES_AFTERMATH = [os.path.abspath(os.path.join(path, 'include'))]
		libdir = 'lib'
		lib = 'GFSDK_Aftermath_Lib'
		if conf.env.COMPILER_CC == 'msvc':
			if conf.env.DEST_CPU == 'x86_64':
				libdir = 'lib/x64'
				lib += '.x64'
			else:
				libdir = 'lib/' + conf.env.DEST_CPU
				lib += conf.env.DEST_CPU
		libdir = os.path.abspath(os.path.join(path, libdir))
		conf.env.LIBPATH_AFTERMATH = [libdir]
		conf.env.LIB_AFTERMATH = [lib]
		conf.end_msg('SDK: {0}, includes: {1}, libpath: {2}, lib: {3}'.format(path, conf.env.INCLUDES_AFTERMATH, conf.env.LIBPATH_AFTERMATH, conf.env.LIB_AFTERMATH))

	# TODO if debug
	conf.env.GLSLCFLAGS += ['-g']

	if '-Werror=declaration-after-statement' in conf.env.CFLAGS:
		conf.env.CFLAGS.remove('-Werror=declaration-after-statement')

def printTestSummary(bld):
	results = getattr(bld, 'utest_results', [])
	for (f, code, out, err) in results:
		if code == 0:
			Logs.pprint('GREEN', '%s: ok' % f)
			continue

		Logs.pprint('RED', '%s: test failed' % f)
		Logs.pprint('CYAN', out.decode('utf-8'))
		Logs.pprint('CYAN', err.decode('utf-8'))

def build(bld):
	if not bld.env.VK:
		return

	libs = [ 'public', 'M' ]
	defines = []
	libpath = []

	source = bld.path.ant_glob(['*.c'])
	glsl_source = bld.path.ant_glob(['shaders/*.vert', 'shaders/*.frag', 'shaders/*.comp'])
	rtx_glsl_source = bld.path.ant_glob(['shaders/*.rgen', 'shaders/*.rchit', 'shaders/*.rmiss', 'shaders/*.rahit'])

	includes = ['.',
		'../filesystem',
		'../engine',
		'../engine/common',
		'../engine/server',
		'../engine/client',
		'../public',
		'../common',
		'../pm_shared' ]

	if bld.env.DEST_OS == 'win32':
		includes.append(bld.env.VULKAN_SDK + '\\Include')
		includes.append(bld.env.VULKAN_SDK + '\\Source\SPIRV-Reflect\include') # for spirv.h 

	if bld.env.HAVE_AFTERMATH:
		defines.append('USE_AFTERMATH')
		libs.append('AFTERMATH')
		for file in ['GFSDK_Aftermath_Lib.x64.dll', 'llvm_7_0_1.dll']:
			bld.install_files(
				bld.env.LIBDIR,
				bld.root.find_dir(bld.env.LIBPATH_AFTERMATH[0]).find_node(file))

	if bld.env.COMPILER_CC == 'msvc':
		bld.env.CFLAGS += ['/WX']

	bld.shlib(
		source   = source,
		target   = 'ref_vk',
		features = 'c',
		includes = includes,
		use      = libs,
		defines  = defines,
		libpath  = libpath,
		install_path = bld.env.LIBDIR,
		subsystem = bld.env.MSVC_SUBSYSTEM
	)

	bld(
		source = glsl_source,
		features = 'glsl',
		# includes = 'shaders/', # write your includes here
		# defines = 'TEST', # write your C preprocessor defines here
		install_path = bld.env.LIBDIR + '/valve' # FIXME TEMPORARY!!!!
	)

	bld(
		source = rtx_glsl_source,
		features = 'glsl',
		install_path = bld.env.LIBDIR + '/valve', # FIXME TEMPORARY!!!!
		glslcflags = '--target-env=vulkan1.2'
	)

	bld.install_files(bld.env.LIBDIR,
					  bld.path.ant_glob('data/**'),
					  cwd=bld.path.find_dir('data/'),
					  relative_trick=True)

	bld.program(features='test', defines=['ALOLCATOR_TEST'],source='alolcator.c', target='alolcator')
	bld.add_post_fun(printTestSummary)

	#from waflib.Tools import waf_unit_test
	#bld.add_post_fun(waf_unit_test.summary)