# -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
VERSION='0.3~dev0'
NAME="ndn-cpp-dev"

from waflib import Build, Logs, Utils, Task, TaskGen, Configure
from waflib.Tools import c_preproc

def options(opt):
    opt.load('compiler_c compiler_cxx gnu_dirs c_osx')
    opt.load('boost doxygen openssl cryptopp coverage', tooldir=['.waf-tools'])

    opt = opt.add_option_group('NDN-CPP Options')

    opt.add_option('--debug',action='store_true',default=False,dest='debug',help='''debugging mode''')

    opt.add_option('--with-tests', action='store_true',default=False,dest='with_tests',
                   help='''build unit tests''')
    opt.add_option('--with-log4cxx', action='store_true',default=False,dest='log4cxx',
                   help='''Compile with log4cxx logging support''')

    opt.add_option('--with-c++11', action='store_true', default=False, dest='use_cxx11',
                   help='''Use C++11 features, even if available in the compiler''')
    opt.add_option('--without-tools', action='store_false', default=True, dest='with_tools',
                   help='''Do not build tools''')

    opt.add_option('--without-sqlite-locking', action='store_false', default=True, dest='with_sqlite_locking',
                   help='''Disable filesystem locking in sqlite3 database (use unix-dot locking mechanism instead). '''
                        '''This option may be necessary if home directory is hosted on NFS.''')
    opt.add_option('--with-pch', action='store_true', default=False, dest='with_pch',
                   help='''Try to use precompiled header to speed up compilation (only gcc and clang)''')
    opt.add_option('--without-osx-keychain', action='store_false', default=True, dest='with_osx_keychain',
                   help='''On Darwin, do not use OSX keychain as a default TPM''')

def configure(conf):
    conf.load("compiler_c compiler_cxx boost gnu_dirs c_osx openssl cryptopp")
    try:
        conf.load("doxygen")
    except:
        pass

    if conf.options.with_tests:
        conf.env['WITH_TESTS'] = True

    if conf.options.with_tools:
        conf.env['WITH_TOOLS'] = True

    conf.check_openssl()

    areCustomCxxflagsPresent = (len(conf.env.CXXFLAGS) > 0)
    if conf.options.debug:
        conf.define('_DEBUG', 1)
        defaultFlags = ['-O0', '-g3',
                        '-Werror',
                        '-Wall',
                        '-fcolor-diagnostics', # only clang supports

                        # to disable known warnings
                        '-Wno-unused-variable', # cryptopp
                        '-Wno-unused-function',
                        '-Wno-deprecated-declarations',
                        ]

        if areCustomCxxflagsPresent:
            missingFlags = [x for x in defaultFlags if x not in conf.env.CXXFLAGS]
            if len(missingFlags) > 0:
                Logs.warn("Selected debug mode, but CXXFLAGS is set to a custom value '%s'"
                           % " ".join(conf.env.CXXFLAGS))
                Logs.warn("Default flags '%s' are not activated" % " ".join(missingFlags))
        else:
            conf.add_supported_cxxflags(cxxflags = defaultFlags)
    else:
        defaultFlags = ['-O2', '-g', '-Wall',

                        # to disable known warnings
                        '-Wno-unused-variable', # cryptopp
                        '-Wno-unused-function',
                        '-Wno-deprecated-declarations',
                        ]
        if not areCustomCxxflagsPresent:
            conf.add_supported_cxxflags(cxxflags = defaultFlags)

    if Utils.unversioned_sys_platform () == "darwin":
        conf.check_cxx(framework_name='CoreFoundation', uselib_store='OSX_COREFOUNDATION', mandatory=True)
        conf.check_cxx(framework_name='CoreServices', uselib_store='OSX_CORESERVICES', mandatory=True)
        conf.check_cxx(framework_name='Security',   uselib_store='OSX_SECURITY',   define_name='HAVE_SECURITY',
                       use="OSX_COREFOUNDATION", mandatory=True)
        conf.define('HAVE_OSX_SECURITY', 1)

    conf.define ("PACKAGE_BUGREPORT", "ndn-lib@lists.cs.ucla.edu")
    conf.define ("PACKAGE_NAME", NAME)
    conf.define ("PACKAGE_VERSION", VERSION)
    conf.define ("PACKAGE_URL", "https://github.com/named-data/ndn-cpp")

    conf.check_cfg(package='sqlite3', args=['--cflags', '--libs'], uselib_store='SQLITE3', mandatory=True)

    if conf.options.log4cxx:
        conf.check_cfg(package='liblog4cxx', args=['--cflags', '--libs'], uselib_store='LOG4CXX', mandatory=True)
        conf.define ("HAVE_LOG4CXX", 1)

    conf.check_cryptopp(path=conf.options.cryptopp_dir, mandatory=True)

    if conf.options.use_cxx11:
        conf.add_supported_cxxflags(cxxflags = ['-std=c++11', '-std=c++0x'])

        conf.check(msg='Checking for type std::shared_ptr',
                   type_name="std::shared_ptr<int>", header_name="memory", define_name='HAVE_STD_SHARED_PTR')
        conf.check(msg='Checking for type std::function',
                   type_name="std::function<void()>", header_name="functional", define_name='HAVE_STD_FUNCTION')
        conf.define('HAVE_CXX11', 1)

    USED_BOOST_LIBS = ['system', 'filesystem', 'date_time', 'iostreams', 'regex', 'program_options', 'chrono']
    if conf.env['WITH_TESTS']:
        USED_BOOST_LIBS += ['unit_test_framework']

    conf.check_boost(lib=USED_BOOST_LIBS, mandatory=True)
    if conf.env.BOOST_VERSION_NUMBER < 104800:
        Logs.error ("Minimum required boost version is 1.48.0")
        Logs.error ("Please upgrade your distribution or install custom boost libraries" +
                    " (http://redmine.named-data.net/projects/nfd/wiki/Boost_FAQ)")
        return

    conf.check_cxx(lib='pthread', uselib_store='PTHREAD', define_name='HAVE_PTHREAD', mandatory=False)
    conf.check_cxx(lib='rt', uselib_store='RT', define_name='HAVE_RT', mandatory=False)
    conf.check_cxx(cxxflags=['-fPIC'], uselib_store='cxxstlib', mandatory=False)

    if not conf.options.with_sqlite_locking:
        conf.define('DISABLE_SQLITE3_FS_LOCKING', 1)

    conf.env['WITH_PCH'] = conf.options.with_pch

    if Utils.unversioned_sys_platform () == "darwin":
        conf.env['WITH_OSX_KEYCHAIN'] = conf.options.with_osx_keychain
        if conf.options.with_osx_keychain:
            conf.define('WITH_OSX_KEYCHAIN', 1)
    else:
        conf.env['WITH_OSX_KEYCHAIN'] = False

    conf.load("coverage")

    conf.define('SYSCONFDIR', conf.env['SYSCONFDIR'])

    conf.write_config_header('src/ndn-cpp-config.h', define_prefix='NDN_CPP_')

def build (bld):
    libndn_cpp = bld (
        features=['cxx', 'cxxstlib'], # 'cxxshlib',
        # vnum = "0.3.0",
        target="ndn-cpp-dev",
        name = "ndn-cpp-dev",
        source = bld.path.ant_glob('src/**/*.cpp',
                                   excl = ['src/**/*-osx.cpp', 'src/**/*-sqlite3.cpp']),
        use = 'BOOST OPENSSL LOG4CXX CRYPTOPP SQLITE3 RT PIC PTHREAD',
        includes = ". src",
        export_includes = "src",
        install_path = '${LIBDIR}',
        )

    if bld.env['WITH_PCH']:
        libndn_cpp.pch = "src/common.hpp"

    if Utils.unversioned_sys_platform () == "darwin":
        libndn_cpp.source += bld.path.ant_glob('src/**/*-osx.cpp')
        libndn_cpp.mac_app = True
        libndn_cpp.use += " OSX_COREFOUNDATION OSX_SECURITY"

    # In case we want to make it optional later
    libndn_cpp.source += bld.path.ant_glob('src/**/*-sqlite3.cpp')


    pkgconfig_libs = []
    pkgconfig_ldflags = []
    pkgconfig_linkflags = []
    pkgconfig_includes = []
    pkgconfig_cxxflags = []
    for lib in Utils.to_list(libndn_cpp.use):
        if bld.env['LIB_%s' % lib]:
            pkgconfig_libs += Utils.to_list(bld.env['LIB_%s' % lib])
        if bld.env['LIBPATH_%s' % lib]:
            pkgconfig_ldflags += Utils.to_list(bld.env['LIBPATH_%s' % lib])
        if bld.env['INCLUDES_%s' % lib]:
            pkgconfig_includes += Utils.to_list(bld.env['INCLUDES_%s' % lib])
        if bld.env['LINKFLAGS_%s' % lib]:
            pkgconfig_linkflags += Utils.to_list(bld.env['LINKFLAGS_%s' % lib])
        if bld.env['CXXFLAGS_%s' % lib]:
            pkgconfig_cxxflags += Utils.to_list(bld.env['CXXFLAGS_%s' % lib])

    EXTRA_FRAMEWORKS = "";
    if Utils.unversioned_sys_platform () == "darwin":
        EXTRA_FRAMEWORKS = "-framework CoreFoundation -framework Security"

    def uniq(alist):
        set = {}
        return [set.setdefault(e,e) for e in alist if e not in set]

    pkconfig = bld (features = "subst",
         source = "libndn-cpp-dev.pc.in",
         target = "libndn-cpp-dev.pc",
         install_path = "${LIBDIR}/pkgconfig",
         VERSION = VERSION,

         # This probably not the right thing to do, but to simplify life of apps
         # that use the library
         EXTRA_LIBS = " ".join([('-l%s' % i) for i in uniq(pkgconfig_libs)]),
         EXTRA_LDFLAGS = " ".join([('-L%s' % i) for i in uniq(pkgconfig_ldflags)]),
         EXTRA_LINKFLAGS = " ".join(uniq(pkgconfig_linkflags)),
         EXTRA_INCLUDES = " ".join([('-I%s' % i) for i in uniq(pkgconfig_includes)]),
         EXTRA_CXXFLAGS = " ".join(uniq(pkgconfig_cxxflags)),
         EXTRA_FRAMEWORKS = EXTRA_FRAMEWORKS,
        )

    # Unit tests
    if bld.env['WITH_TESTS']:
        bld.recurse('tests')
        bld.recurse('tests-integrated')

    if bld.env['WITH_TOOLS']:
        bld.recurse("tools examples")
    else:
        bld.recurse("examples")

    headers = bld.path.ant_glob(['src/**/*.hpp'])
    bld.install_files("%s/ndn-cpp-dev" % bld.env['INCLUDEDIR'], headers, relative_trick=True, cwd=bld.path.find_node('src'))

    bld.install_files("%s/ndn-cpp-dev" % bld.env['INCLUDEDIR'], bld.path.find_resource('src/ndn-cpp-config.h'))

    bld.install_files("${SYSCONFDIR}/ndn", "client.conf.sample")

@Configure.conf
def add_supported_cxxflags(self, cxxflags):
    """
    Check which cxxflags are supported by compiler and add them to env.CXXFLAGS variable
    """
    self.start_msg('Checking allowed flags for c++ compiler')

    supportedFlags = []
    for flag in cxxflags:
        if self.check_cxx (cxxflags=[flag], mandatory=False):
            supportedFlags += [flag]

    self.end_msg (' '.join (supportedFlags))
    self.env.CXXFLAGS += supportedFlags

# doxygen docs
from waflib.Build import BuildContext
class doxy(BuildContext):
    cmd = "doxygen"
    fun = "doxygen"

def doxygen(bld):
    if not bld.env.DOXYGEN:
        bld.fatal("ERROR: cannot build documentation (`doxygen' is not found in $PATH)")
    bld(features="doxygen",
        doxyfile='docs/doxygen.conf')

# doxygen docs
from waflib.Build import BuildContext
class sphinx (BuildContext):
    cmd = "sphinx"
    fun = "sphinx"

def sphinx (bld):
    bld.load('sphinx_build', tooldir=['waf-tools'])

    bld (features="sphinx",
         outdir = "doc/html",
         source = "doc/source/conf.py")


@TaskGen.feature('cxx')
@TaskGen.before('process_source')
def process_pch(self):
    if getattr(self, 'pch', ''):
        # for now support only gcc-compatible things
        if self.env['COMPILER_CXX'] == 'g++':
            nodes = self.to_nodes(self.pch, path=self.path)
            for x in nodes:
                z = self.create_task('gchx', x, x.change_ext('.hpp.gch'))
                z.orig_self = self

class gchx(Task.Task):
    run_str = '${CXX} -x c++-header ${CXXFLAGS} ${FRAMEWORKPATH_ST:FRAMEWORKPATH} ${CPPPATH_ST:INCPATHS} ${DEFINES_ST:DEFINES} ${CXX_SRC_F}${SRC} ${CXX_TGT_F}${TGT}'
    scan    = c_preproc.scan
    ext_out = ['.hpp']
    color   = 'BLUE'

    def post_run(self):
        super(gchx, self).post_run()
        self.orig_self.env['CXXFLAGS'] = ['-include', self.inputs[0].relpath()] + self.env['CXXFLAGS']