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

VERSION='0.1'
APPNAME='template'

from waflib import Build, Logs, Options, TaskGen
import subprocess
import os

def options(opt):
    opt.load(['compiler_c', 'compiler_cxx'])
    opt.load(['default-compiler-flags',
              'boost', 'ns3'],
             tooldir=['.waf-tools'])

    opt.add_option('--logging',action='store_true',default=True,dest='logging',help='''enable logging in simulation scripts''')
    opt.add_option('--run',
                   help=('Run a locally built program; argument can be a program name,'
                         ' or a command starting with the program name.'),
                   type="string", default='', dest='run')
    opt.add_option('--visualize',
                   help=('Modify --run arguments to enable the visualizer'),
                   action="store_true", default=False, dest='visualize')
    opt.add_option('--mpi',
                   help=('Run in MPI mode'),
                   type="string", default="", dest="mpi")
    opt.add_option('--time',
                   help=('Enable time for the executed command'),
                   action="store_true", default=False, dest='time')

MANDATORY_NS3_MODULES = ['core', 'network', 'point-to-point', 'applications', 'mobility', 'ndnSIM']
OTHER_NS3_MODULES = ['antenna', 'aodv', 'bridge', 'brite', 'buildings', 'click', 'config-store', 'csma', 'csma-layout', 'dsdv', 'dsr', 'emu', 'energy', 'fd-net-device', 'flow-monitor', 'internet', 'lte', 'mesh', 'mpi', 'netanim', 'nix-vector-routing', 'olsr', 'openflow', 'point-to-point-layout', 'propagation', 'spectrum', 'stats', 'tap-bridge', 'topology-read', 'uan', 'virtual-net-device', 'visualizer', 'wifi', 'wimax']

def configure(conf):
    conf.load(['compiler_c', 'compiler_cxx',
               'default-compiler-flags',
               'boost', 'ns3'])

    if not os.environ.has_key('PKG_CONFIG_PATH'):
        os.environ['PKG_CONFIG_PATH'] = ':'.join([
            '/usr/local/lib/pkgconfig',
            '/opt/local/lib/pkgconfig'])

    try:
        conf.check_ns3_modules(MANDATORY_NS3_MODULES)
        for module in OTHER_NS3_MODULES:
            conf.check_ns3_modules(module, mandatory = False)
    except:
        Logs.error ("NS-3 or one of the required NS-3 modules not found")
        Logs.error ("NS-3 needs to be compiled and installed somewhere.  You may need also to set PKG_CONFIG_PATH variable in order for configure find installed NS-3.")
        Logs.error ("For example:")
        Logs.error ("    PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH ./waf configure")
        conf.fatal ("")

    if conf.options.debug:
        conf.define ('NS3_LOG_ENABLE', 1)
        conf.define ('NS3_ASSERT_ENABLE', 1)

    if conf.env.DEST_BINFMT == 'elf':
        # All ELF platforms are impacted but only the gcc compiler has a flag to fix it.
        if 'gcc' in (conf.env.CXX_NAME, conf.env.CC_NAME):
            conf.env.append_value('SHLIB_MARKER', '-Wl,--no-as-needed')

    conf.check_compiler_flags()
            
    if conf.options.logging:
        conf.define('NS3_LOG_ENABLE', 1)
        conf.define('NS3_ASSERT_ENABLE', 1)

def build (bld):
    deps =  ' '.join (['ns3_'+dep for dep in MANDATORY_NS3_MODULES + OTHER_NS3_MODULES]).upper ()

    common = bld.objects (
        target = "extensions",
        features = ["cxx"],
        source = bld.path.ant_glob(['extensions/**/*.cc', 'extensions/**/*.cpp']),
        use = deps,
        )

    for scenario in bld.path.ant_glob (['scenarios/*.cc']):
        name = str(scenario)[:-len(".cc")]
        app = bld.program (
            target = name,
            features = ['cxx'],
            source = [scenario],
            use = deps + " extensions",
            includes = "extensions"
            )

    for scenario in bld.path.ant_glob (['scenarios/*.cpp']):
        name = str(scenario)[:-len(".cpp")]
        app = bld.program (
            target = name,
            features = ['cxx'],
            source = [scenario],
            use = deps + " extensions",
            includes = "extensions"
            )

def shutdown (ctx):
    if Options.options.run:
        visualize=Options.options.visualize
        mpi = Options.options.mpi

        if mpi and visualize:
            Logs.error ("You cannot specify --mpi and --visualize options at the same time!!!")
            return

        argv = Options.options.run.split (' ');
        argv[0] = "build/%s" % argv[0]

        if visualize:
            argv.append ("--SimulatorImplementationType=ns3::VisualSimulatorImpl")

        if mpi:
            argv.append ("--SimulatorImplementationType=ns3::DistributedSimulatorImpl")
            argv.append ("--mpi=1")
            argv = ["openmpirun", "-np", mpi] + argv
            Logs.error (argv)

        if Options.options.time:
            argv = ["time"] + argv

        return subprocess.call (argv)