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

import os
from waflib import Logs, Utils, Options, TaskGen, Task
from waflib.Errors import WafError

import wutils

REQUIRED_BOOST_LIBS = ['graph']

def required_boost_libs(conf):
    conf.env.REQUIRED_BOOST_LIBS += REQUIRED_BOOST_LIBS

def configure(conf):
    conf.env['ENABLE_NDNSIM']=False;

    conf.check_cfg(package='libndn-cxx', args=['--cflags', '--libs'],
                   uselib_store='NDN_CXX', mandatory=True)

    if not conf.env['LIB_BOOST']:
        conf.report_optional_feature("ndnSIM", "ndnSIM", False,
                                     "Required boost libraries not found")
        Logs.error ("ndnSIM will not be build as it requires boost libraries of version at least 1.48")
        conf.env['MODULES_NOT_BUILT'].append('ndnSIM')
        return
    else:
        present_boost_libs = []
        for boost_lib_name in conf.env['LIB_BOOST']:
            if boost_lib_name.startswith("boost_"):
                boost_lib_name = boost_lib_name[6:]
            if boost_lib_name.endswith("-mt"):
                boost_lib_name = boost_lib_name[:-3]
            present_boost_libs.append(boost_lib_name)

        missing_boost_libs = [lib for lib in REQUIRED_BOOST_LIBS if lib not in present_boost_libs]

        if missing_boost_libs != []:
            conf.report_optional_feature("ndnSIM", "ndnSIM", False,
                                         "ndnSIM requires boost libraries: %s" % ' '.join(missing_boost_libs))
            conf.env['MODULES_NOT_BUILT'].append('ndnSIM')

            Logs.error ("ndnSIM will not be build as it requires boost libraries: %s" % ' '.join(missing_boost_libs))
            Logs.error ("Please upgrade your distribution or install custom boost libraries (http://ndnsim.net/faq.html#boost-libraries)")
            return

        boost_version = conf.env.BOOST_VERSION.split('_')
        if int(boost_version[0]) < 1 or int(boost_version[1]) < 48:
            conf.report_optional_feature("ndnSIM", "ndnSIM", False,
                                         "ndnSIM requires at least boost version 1.48")
            conf.env['MODULES_NOT_BUILT'].append('ndnSIM')

            Logs.error ("ndnSIM will not be build as it requires boost libraries of version at least 1.48")
            Logs.error ("Please upgrade your distribution or install custom boost libraries (http://ndnsim.net/faq.html#boost-libraries)")
            return

    conf.env['ENABLE_NDNSIM']=True;
    conf.env['MODULES_BUILT'].append('ndnSIM')

    conf.report_optional_feature("ndnSIM", "ndnSIM", True, "")

def build(bld):
    deps = ['core', 'network', 'point-to-point', 'topology-read', 'mobility', 'internet']
    if 'ns3-visualizer' in bld.env['NS3_ENABLED_MODULES']:
        deps.append('visualizer')

    if bld.env.ENABLE_EXAMPLES:
        deps += ['point-to-point-layout', 'csma', 'applications']

    module = bld.create_ns3_module ('ndnSIM', deps)
    module.module = 'ndnSIM'
    module.features += ' ns3fullmoduleheaders'
    module.uselib = 'NDN_CXX BOOST'
    module.includes = [".", "./NFD", "./NFD/daemon", "./NFD/core"]
    module.export_includes = [".", "./NFD", "./NFD/daemon", "./NFD/core"]

    headers = bld (features='ns3header')
    headers.module = 'ndnSIM'
    headers.source = ["ndn-all.hpp"]

    if not bld.env['ENABLE_NDNSIM']:
        bld.env['MODULES_NOT_BUILT'].append('ndnSIM')
        return

    module_dirs = ['NFD', 'apps', 'helper', 'model', 'utils']
    
    module.source = bld.path.ant_glob(['%s/**/*.cpp' % dir for dir in module_dirs],
                                      excl=['model/ip-faces/*'])

    module.full_headers = [p.path_from(bld.path) for p in bld.path.ant_glob(
        ['%s/**/*.hpp' % dir for dir in module_dirs])]

    if bld.env.ENABLE_EXAMPLES:
        bld.recurse('examples')

    bld.ns3_python_bindings()

@TaskGen.feature('ns3fullmoduleheaders')
@TaskGen.after_method('process_rule')
def apply_ns3fullmoduleheaders(self):
    # ## get all of the ns3 headers
    ns3_dir_node = self.bld.path.find_or_declare("ns3")

    mode = getattr(self, "mode", "install")

    for filename in set(self.to_list(self.full_headers)):
        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.path_from(self.bld.path.find_dir('src')))
        assert dst_node is not None

        relpath = src_node.parent.path_from(self.bld.path.find_dir('src'))

        task = self.create_task('ns3header')
        task.mode = getattr(self, 'mode', 'install')
        if task.mode == 'install':
            self.bld.install_files('${INCLUDEDIR}/%s%s/ns3/%s' % (wutils.APPNAME, wutils.VERSION, relpath),
                                   [src_node])
            task.set_inputs([src_node])
            task.set_outputs([dst_node])
        else:
            task.header_to_remove = dst_node