## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-

from __future__ import print_function

import os, os.path

import sys

import shutil

import types

import warnings

from waflib import TaskGen, Task, Options, Build, Utils

from waflib.Errors import WafError

import wutils

try:

    set

except NameError:

    from sets import Set as set # Python 2.3 fallback

all_modules = []

for dirname in os.listdir('src'):

    if dirname.startswith('.') or dirname == 'CVS':

        continue

    path = os.path.join('src', dirname)

    if not os.path.isdir(path):

        continue

    if os.path.exists(os.path.join(path, 'wscript')):

        all_modules.append(dirname)

all_modules.sort()

def options(opt):

    opt.add_option('--enable-rpath',

                   help=("Link programs with rpath"

                         " (normally not needed, see "

                         " --run and --shell; moreover, only works in some"

                         " specific platforms, such as Linux and Solaris)"),

                   action="store_true", dest='enable_rpath', default=False)

    opt.add_option('--enable-modules',

                   help=("Build only these modules (and dependencies)"),

                   dest='enable_modules')

    opt.load('boost', tooldir=['waf-tools'])

    for module in all_modules:

        opt.recurse(module, mandatory=False)

def configure(conf):

    conf.env['REQUIRED_BOOST_LIBS'] = []

    for module in all_modules:

        conf.recurse (module, name="required_boost_libs", mandatory=False)

    if conf.env['REQUIRED_BOOST_LIBS'] is not []:

        conf.load('boost')

        conf.check_boost(lib=' '.join (conf.env['REQUIRED_BOOST_LIBS']), mandatory=False)

        if not conf.env['LIB_BOOST']:

            conf.check_boost(lib=' '.join (conf.env['REQUIRED_BOOST_LIBS']), libpath="/usr/lib64", mandatory=False)

            if not conf.env['LIB_BOOST']:

                conf.env['LIB_BOOST'] = []

    # Append blddir to the module path before recursing into modules

    blddir = os.path.abspath(os.path.join(conf.bldnode.abspath(), conf.variant))

    conf.env.append_value('NS3_MODULE_PATH', blddir)

    for module in all_modules:

        conf.recurse(module, mandatory=False)

    # Remove duplicate path items

    conf.env['NS3_MODULE_PATH'] = wutils.uniquify_list(conf.env['NS3_MODULE_PATH'])

    if Options.options.enable_rpath:

        conf.env.append_value('RPATH', '-Wl,-rpath,%s' % (os.path.join(blddir),))

    ## Used to link the 'test-runner' program with all of ns-3 code

    conf.env['NS3_MODULES'] = ['ns3-' + module.split('/')[-1] for module in all_modules]

# we need the 'ns3module' waf "feature" to be created because code

# elsewhere looks for it to find the ns3 module objects.

@TaskGen.feature('ns3module')

def _add_test_code(module):

    pass

def create_ns3_module(bld, name, dependencies=(), test=False):

    static = bool(bld.env.ENABLE_STATIC_NS3)

    # Create a separate library for this module.

    if static:

        module = bld(features='cxx cxxstlib ns3module')

    else:

        module = bld(features='cxx cxxshlib ns3module')

    module.target = '%s/ns%s-%s%s' % (bld.srcnode.path_from(module.path), wutils.VERSION,

                                       name, bld.env.BUILD_SUFFIX)

    linkflags = []

    cxxflags = []

    ccflags = []

    if not static:

        cxxflags = module.env['shlib_CXXFLAGS']

        ccflags = module.env['shlib_CXXFLAGS']

        # Turn on the link flags for shared libraries if we have the

        # proper compiler and platform.

        if module.env['CXX_NAME'] in ['gcc', 'icc'] and module.env['WL_SONAME_SUPPORTED']:

            # Get the module library name without any relative paths

            # at its beginning because all of the libraries will end

            # up in the same directory.

            module_library_name = module.env.cshlib_PATTERN % (os.path.basename(module.target),)

            linkflags = '-Wl,--soname=' + module_library_name

    cxxdefines = ["NS3_MODULE_COMPILATION"]

    ccdefines = ["NS3_MODULE_COMPILATION"]

    module.env.append_value('CXXFLAGS', cxxflags)

    module.env.append_value('CCFLAGS', ccflags)

    module.env.append_value('LINKFLAGS', linkflags)

    module.env.append_value('CXXDEFINES', cxxdefines)

    module.env.append_value('CCDEFINES', ccdefines)

    module.is_static = static

    module.vnum = wutils.VNUM

    # Add the proper path to the module's name.

    # Set the libraries this module depends on.  

    module.module_deps = list(dependencies)

    module.install_path = "${LIBDIR}"

    module.name = "ns3-" + name

    module.dependencies = dependencies

    # Initially create an empty value for this because the pcfile

    # writing task assumes every module has a uselib attribute.

    module.uselib = ''

    module.use = ['ns3-' + dep for dep in dependencies]

    module.test = test

    module.is_ns3_module = True

    module.ns3_dir_location = bld.path.path_from(bld.srcnode)

    module.env.append_value("INCLUDES", '#')

    module.pcfilegen = bld(features='ns3pcfile')

    module.pcfilegen.module = module.name

    return module

@TaskGen.feature("ns3testlib")

@TaskGen.before_method("apply_incpaths")

def apply_incpaths_ns3testlib(self):

    if not self.source:

        return

    testdir = self.source[-1].parent.path_from(self.bld.srcnode)

    self.env.append_value("DEFINES", 'NS_TEST_SOURCEDIR="%s"' % (testdir,))

def create_ns3_module_test_library(bld, name):

    # Create an ns3 module for the test library that depends only on

    # the module being tested.

    library_name = name + "-test"

    library = bld.create_ns3_module(library_name, [name], test=True)

    library.features += " ns3testlib"

    # Modify attributes for the test library that are different from a

    # normal module.

    del library.is_ns3_module

    library.is_ns3_module_test_library = True

    library.module_name = 'ns3-' + name

    # Add this module and test library to the list.

    bld.env.append_value('NS3_MODULES_WITH_TEST_LIBRARIES', [(library.module_name, library.name)])

    # Set the include path from the build directory to modules. 

    relative_path_from_build_to_here = bld.path.path_from(bld.bldnode)

    include_flag = '-I' + relative_path_from_build_to_here

    library.env.append_value('CXXFLAGS', include_flag)

    library.env.append_value('CCFLAGS',  include_flag)

    return library

def create_obj(bld, *args):

    warnings.warn("(in %s) Use bld(...) call now, instead of bld.create_obj(...)" % str(bld.path),

                  DeprecationWarning, stacklevel=2)

    return bld(*args)

def ns3_python_bindings(bld):

    # this method is called from a module wscript, so remember bld.path is not bindings/python!

    module_abs_src_path = bld.path.abspath()

    module = os.path.basename(module_abs_src_path)

    env = bld.env

    env.append_value("MODULAR_BINDINGS_MODULES", "ns3-"+module)

    if Options.options.apiscan:

        return

    if not env['ENABLE_PYTHON_BINDINGS']:

        return

    bindings_dir = bld.path.find_dir("bindings")

    if bindings_dir is None or not os.path.exists(bindings_dir.abspath()):

        warnings.warn("(in %s) Requested to build modular python bindings, but apidefs dir not found "

                      "=> skipped the bindings." % str(bld.path),

                      Warning, stacklevel=2)

        return

    if ("ns3-%s" % (module,)) not in env.NS3_ENABLED_MODULES:

        #print "bindings for module %s which is not enabled, skip" % module

        return

    env.append_value('PYTHON_MODULES_BUILT', module)

    try:

        apidefs = env['PYTHON_BINDINGS_APIDEFS'].replace("-", "_")

    except AttributeError:

        # we likely got an empty list for env['PYTHON_BINDINGS_APIDEFS']

        return

    #debug = ('PYBINDGEN_DEBUG' in os.environ)

    debug = True # XXX

    source = [bld.srcnode.find_resource('bindings/python/ns3modulegen-modular.py'),

              bld.path.find_resource("bindings/modulegen__%s.py" % apidefs)]

    modulegen_customizations = bindings_dir.find_resource("modulegen_customizations.py")

    if modulegen_customizations is not None:

        source.append(modulegen_customizations)

    modulegen_local = bld.path.find_resource("bindings/modulegen_local.py")

    # the local customization file may or not exist

    if modulegen_local is not None:

        source.append("bindings/modulegen_local.py")

    module_py_name = module.replace('-', '_')

    module_target_dir = bld.srcnode.find_dir("bindings/python/ns").path_from(bld.path)

    # if bindings/<module>.py exists, it becomes the module frontend, and the C extension befomes _<module>

    if bld.path.find_resource("bindings/%s.py" % (module_py_name,)) is not None:

        bld(features='copy',

            source=("bindings/%s.py" % (module_py_name,)),

            target=('%s/%s.py' % (module_target_dir, module_py_name)))

        extension_name = '_%s' % (module_py_name,)

        bld.install_files('${PYTHONARCHDIR}/ns', ["bindings/%s.py" % (module_py_name,)])

    else:

        extension_name = module_py_name

    target = ['bindings/ns3module.cc', 'bindings/ns3module.h', 'bindings/ns3modulegen.log']

    #if not debug:

    #    target.append('ns3modulegen.log')

    argv = ['NS3_ENABLED_FEATURES=${FEATURES}',

            'GCC_RTTI_ABI_COMPLETE=${GCC_RTTI_ABI_COMPLETE}',

            '${PYTHON}']

    #if debug:

    #    argv.extend(["-m", "pdb"])

    argv.extend(['${SRC[0]}', module_abs_src_path, apidefs, extension_name, '${TGT[0]}'])

    argv.extend(['2>', '${TGT[2]}']) # 2> ns3modulegen.log

    features = []

    for (name, caption, was_enabled, reason_not_enabled) in env['NS3_OPTIONAL_FEATURES']:

        if was_enabled:

            features.append(name)

    bindgen = bld(features='command', source=source, target=target, command=argv)

    bindgen.env['FEATURES'] = ','.join(features)

    bindgen.dep_vars = ['FEATURES', "GCC_RTTI_ABI_COMPLETE"]

    bindgen.before = 'cxx'

    bindgen.after = 'gen_ns3_module_header'

    bindgen.name = "pybindgen(ns3 module %s)" % module

    bindgen.install_path = None

    # generate the extension module

    pymod = bld(features='cxx cxxshlib pyext')

    pymod.source = ['bindings/ns3module.cc']

    pymod.target = '%s/%s' % (module_target_dir, extension_name)

    pymod.name = 'ns3module_%s' % module

    pymod.use = ["%s" % mod for mod in pymod.env['NS3_ENABLED_MODULES']] #  Should be '"ns3-"+module', but see bug 1117

    if pymod.env['ENABLE_STATIC_NS3']:

        if sys.platform == 'darwin':

            pymod.env.append_value('LINKFLAGS', '-Wl,-all_load')

            for mod in pymod.usel:

                #mod = mod.split("--lib")[0]

                pymod.env.append_value('LINKFLAGS', '-l' + mod)

        else:

            pymod.env.append_value('LINKFLAGS', '-Wl,--whole-archive,-Bstatic')

            for mod in pymod.use:

                #mod = mod.split("--lib")[0]

                pymod.env.append_value('LINKFLAGS', '-l' + mod)

            pymod.env.append_value('LINKFLAGS', '-Wl,-Bdynamic,--no-whole-archive')

    defines = list(pymod.env['DEFINES'])

    defines.extend(['NS_DEPRECATED=', 'NS3_DEPRECATED_H'])

    if Options.platform == 'win32':

        try:

            defines.remove('_DEBUG') # causes undefined symbols on win32

        except ValueError:

            pass

    pymod.env['DEFINES'] = defines

    pymod.includes = '# bindings'

    pymod.install_path = '${PYTHONARCHDIR}/ns'

    # Workaround to a WAF bug, remove this when ns-3 upgrades to WAF > 1.6.10

    # https://www.nsnam.org/bugzilla/show_bug.cgi?id=1335

    # http://code.google.com/p/waf/issues/detail?id=1098

    if Utils.unversioned_sys_platform() == 'darwin':

        pymod.mac_bundle = True

    return pymod

def build(bld):

    bld.create_ns3_module = types.MethodType(create_ns3_module, bld)

    bld.create_ns3_module_test_library = types.MethodType(create_ns3_module_test_library, bld)

    bld.create_obj = types.MethodType(create_obj, bld)

    bld.ns3_python_bindings = types.MethodType(ns3_python_bindings, bld)

    # Remove these modules from the list of all modules.

    for not_built in bld.env['MODULES_NOT_BUILT']:

        # XXX Becaue these modules are located in subdirectories of

        # test, their names in the all_modules list include the extra

        # relative path "test/".  If these modules are moved into the

        # src directory, then this if block should be removed.

        if not_built == 'ns3tcp' or not_built == 'ns3wifi':

            not_built = 'test/' + not_built

        if not_built in all_modules:

            all_modules.remove(not_built)

    bld.recurse(list(all_modules))

    for module in all_modules:

        modheader = bld(features='ns3moduleheader')

        modheader.module = module.split('/')[-1]

class ns3pcfile_task(Task.Task):

    after = 'cxx'

    def __str__(self):

        "string to display to the user"

        tgt_str = ' '.join([a.bldpath() for a in self.outputs])

        return 'pcfile: %s\n' % (tgt_str)

    def runnable_status(self):

        return super(ns3pcfile_task, self).runnable_status()

    def _self_libs(self, env, name, libdir):

        if env['ENABLE_STATIC_NS3']:

            path_st = 'STLIBPATH_ST'

            lib_st = 'STLIB_ST'

            lib_marker = 'STLIB_MARKER'

        else:

            path_st = 'LIBPATH_ST'

            lib_st = 'LIB_ST'

            lib_marker = 'SHLIB_MARKER'

        retval = [env[path_st] % libdir]

        if env[lib_marker]:

            retval.append(env[lib_marker])

        retval.append(env[lib_st] % name)

        return retval

    def _lib(self, env, dep):

        libpath = env['LIBPATH_%s' % dep]

        linkflags = env['LINKFLAGS_%s' % dep]

        libs = env['LIB_%s' % dep]

        retval = []

        for path in libpath:

            retval.append(env['LIBPATH_ST'] % path)

            retval = retval + linkflags

        for lib in libs:

            retval.append(env['LIB_ST'] % lib)

        return retval

    def _listify(self, v):

        if isinstance(v, list):

            return v

        else:

            return [v]

    def _cflags(self, dep):

        flags = self.env['CFLAGS_%s' % dep]

        return self._listify(flags)

    def _cxxflags(self, dep):

        return self._listify(self.env['CXXFLAGS_%s' % dep])

    def _defines(self, dep):

        return [self.env['DEFINES_ST'] % define for define in self.env['DEFINES_%s' % dep]] 

    def _includes(self, dep):

        includes = self.env['INCLUDES_%s' % dep]

        return [self.env['CPPPATH_ST'] % include for include in includes]

    def _generate_pcfile(self, name, use, env, outfilename):

        outfile = open(outfilename, 'wt')

        prefix = env.PREFIX

        includedir = Utils.subst_vars('${INCLUDEDIR}/%s%s' % (wutils.APPNAME, wutils.VERSION), env)

        libdir = env.LIBDIR

        libs = self._self_libs(env, "%s%s-%s%s" % (wutils.APPNAME, wutils.VERSION, name[4:], env.BUILD_SUFFIX), '${libdir}')

        for dep in use:

            libs += self._lib(env, dep)

        for dep in env.LIBS:

            libs += self.env['LIB_ST'] % dep

        cflags = [self.env['CPPPATH_ST'] % '${includedir}']

        requires = []

        for dep in use:

            cflags = cflags + self._cflags(dep) + self._cxxflags(dep) + \

                self._defines(dep) + self._includes(dep)

            if dep.startswith('ns3-'):

                dep_name = dep[4:]

                requires.append("libns%s-%s%s" % (wutils.VERSION, dep_name, env.BUILD_SUFFIX))

        print("""\

prefix=%s

libdir=%s

includedir=%s

Name: lib%s

Description: ns-3 module %s

Version: %s

Libs: %s

Cflags: %s

Requires: %s\

""" % (prefix, libdir, includedir,

       name, name, wutils.VERSION, ' '.join(libs), ' '.join(cflags), ' '.join(requires)), file=outfile)

        outfile.close()

    def run(self):

        output_filename = self.outputs[0].abspath()

        self._generate_pcfile(self.module.name, 

                              self.module.to_list(self.module.use),

                              self.env, output_filename)

@TaskGen.feature('ns3pcfile')

@TaskGen.after_method('process_rule')

def apply(self):

    module = self.bld.find_ns3_module(self.module)

    output_filename = 'lib%s.pc' % os.path.basename(module.target)

    output_node = self.path.find_or_declare(output_filename)

    assert output_node is not None, str(self)

    task = self.create_task('ns3pcfile')

    self.bld.install_files('${LIBDIR}/pkgconfig', output_node)

    task.set_outputs([output_node])

    task.module = module

@TaskGen.feature('ns3header')

@TaskGen.after_method('process_rule')

def apply_ns3header(self):

    if self.module is None:

        raise WafError("'module' missing on ns3headers object %s" % self)

    ns3_dir_node = self.bld.path.find_or_declare("ns3")

    for filename in set(self.to_list(self.source)):

        src_node = self.path.find_resource(filename)

        if src_node is None:

            raise WafError("source ns3 header file %s not found" % (filename,))

        dst_node = ns3_dir_node.find_or_declare(src_node.name)

        assert dst_node is not None

        task = self.create_task('ns3header')

        task.mode = getattr(self, 'mode', 'install')

        if task.mode == 'install':

            self.bld.install_files('${INCLUDEDIR}/%s%s/ns3' % (wutils.APPNAME, wutils.VERSION), [src_node])

            task.set_inputs([src_node])

            task.set_outputs([dst_node])

        else:

            task.header_to_remove = dst_node

    self.headers = set(self.to_list(self.source))

    self.source = '' # tell WAF not to process these files further

class ns3header_task(Task.Task):

    before = 'cxx gen_ns3_module_header'

    color = 'BLUE'

    def __str__(self):

        "string to display to the user"

        env = self.env

        src_str = ' '.join([a.bldpath() for a in self.inputs])

        tgt_str = ' '.join([a.bldpath() for a in self.outputs])

        if self.outputs: sep = ' -> '

        else: sep = ''

        if self.mode == 'remove':

            return 'rm-ns3-header %s' % (self.header_to_remove.abspath(),)