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

import os
import subprocess
from waflib import Context, Logs, Utils

VERSION = '0.9.0'
APPNAME = 'ndn-cxx'
GIT_TAG_PREFIX = 'ndn-cxx-'

def options(opt):
    opt.load(['compiler_cxx', 'gnu_dirs', 'c_osx'])
    opt.load(['cross', 'default-compiler-flags', 'pch',
              'coverage', 'sanitizers', 'osx-frameworks',
              'boost', 'openssl', 'sqlite3',
              'doxygen', 'sphinx'],
             tooldir=['.waf-tools'])

    opt = opt.add_option_group('ndn-cxx Options')

    opt.add_option('--enable-static', action='store_true', default=False,
                   dest='enable_static', help='Build static library (disabled by default)')
    opt.add_option('--disable-static', action='store_false', default=False,
                   dest='enable_static', help='Do not build static library (disabled by default)')

    opt.add_option('--enable-shared', action='store_true', default=True,
                   dest='enable_shared', help='Build shared library (enabled by default)')
    opt.add_option('--disable-shared', action='store_false', default=True,
                   dest='enable_shared', help='Do not build shared library (enabled by default)')

    opt.add_option('--with-osx-keychain', action='store_true', default=False,
                   help='Use macOS Keychain as default TPM (macOS only)')

    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 the home directory is hosted on NFS.')

    stacktrace_choices = ['backtrace', 'addr2line', 'basic', 'noop']
    opt.add_option('--with-stacktrace', action='store', default=None, choices=stacktrace_choices,
                   help='Select the stacktrace backend implementation: '
                        '%s [default=auto-detect]' % ', '.join(stacktrace_choices))
    opt.add_option('--without-stacktrace', action='store_const', const='', dest='with_stacktrace',
                   help='Disable stacktrace support')

    opt.add_option('--with-examples', action='store_true', default=False,
                   help='Build examples')

    opt.add_option('--with-tests', action='store_true', default=False,
                   help='Build all tests (benchmarks, integration tests, unit tests)')
    opt.add_option('--with-benchmarks', action='store_true', default=False,
                   help='Build benchmarks')
    opt.add_option('--with-integration-tests', action='store_true', default=False,
                   help='Build integration tests')
    opt.add_option('--with-unit-tests', action='store_true', default=False,
                   help='Build unit tests')

    opt.add_option('--without-tools', action='store_false', default=True, dest='with_tools',
                   help='Do not build tools')

def configure(conf):
    conf.start_msg('Building static library')
    if conf.options.enable_static:
        conf.end_msg('yes')
    else:
        conf.end_msg('no', color='YELLOW')
    conf.env.enable_static = conf.options.enable_static

    conf.start_msg('Building shared library')
    if conf.options.enable_shared:
        conf.end_msg('yes')
    else:
        conf.end_msg('no', color='YELLOW')
    conf.env.enable_shared = conf.options.enable_shared

    if not conf.options.enable_shared and not conf.options.enable_static:
        conf.fatal('Either static library or shared library must be enabled')

    conf.load(['compiler_cxx', 'gnu_dirs', 'c_osx',
               'cross', 'default-compiler-flags', 'pch',
               'osx-frameworks', 'boost', 'openssl', 'sqlite3',
               'doxygen', 'sphinx'])

    conf.env.WITH_EXAMPLES = conf.options.with_examples
    conf.env.WITH_BENCHMARKS = conf.options.with_benchmarks or conf.options.with_tests
    conf.env.WITH_INTEGRATION_TESTS = conf.options.with_integration_tests or conf.options.with_tests
    conf.env.WITH_UNIT_TESTS = conf.options.with_unit_tests or conf.options.with_tests
    conf.env.WITH_TOOLS = conf.options.with_tools

    conf.find_program('dot', mandatory=False)

    conf.check_cxx(lib='atomic', uselib_store='ATOMIC', define_name='HAVE_ATOMIC', mandatory=False)
    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(msg='Checking for function getpass', define_name='HAVE_GETPASS', mandatory=False,
                   fragment='''#include <unistd.h>
                               int main() { getpass("Enter password"); }''')

    if conf.check_cxx(msg='Checking for netlink', define_name='HAVE_NETLINK', mandatory=False,
                      header_name=['linux/if_addr.h', 'linux/if_link.h',
                                   'linux/netlink.h', 'linux/rtnetlink.h', 'linux/genetlink.h']):
        conf.env.HAVE_NETLINK = True
        conf.check_cxx(msg='Checking for NETLINK_EXT_ACK', define_name='HAVE_NETLINK_EXT_ACK', mandatory=False,
                       fragment='''#include <linux/netlink.h>
                                   int main() { return NETLINK_EXT_ACK; }''')
        conf.check_cxx(msg='Checking for IFA_FLAGS', define_name='HAVE_IFA_FLAGS', mandatory=False,
                       fragment='''#include <linux/if_addr.h>
                                   int main() { return IFA_FLAGS; }''')

    conf.check_osx_frameworks()
    conf.check_sqlite3()
    conf.check_openssl(lib='crypto', atleast_version='1.1.1')

    conf.check_boost()
    if conf.env.BOOST_VERSION_NUMBER < 107100:
        conf.fatal('The minimum supported version of Boost is 1.71.0.\n'
                   'Please upgrade your distribution or manually install a newer version of Boost.\n'
                   'For more information, see https://redmine.named-data.net/projects/nfd/wiki/Boost')

    # Boost.Log requires Boost.Thread
    boost_libs = ['chrono', 'filesystem', 'log', 'thread']

    # Boost.Date_Time is header-only since 1.73
    if conf.env.BOOST_VERSION_NUMBER < 107300:
        boost_libs.append('date_time')

    stacktrace_backend = conf.options.with_stacktrace
    if stacktrace_backend is None:
        # auto-detect
        for candidate in ('backtrace', 'basic'):
            try:
                conf.check_boost(lib=f'stacktrace_{candidate}', mt=True)
            except conf.errors.ConfigurationError:
                continue
            stacktrace_backend = candidate
            break
    if stacktrace_backend:
        conf.env.HAVE_STACKTRACE = True
        conf.env.append_unique('DEFINES_BOOST', ['BOOST_STACKTRACE_DYN_LINK'])
        boost_libs.append(f'stacktrace_{stacktrace_backend}')

    conf.check_boost(lib=boost_libs, mt=True)

    if conf.env.WITH_BENCHMARKS or conf.env.WITH_INTEGRATION_TESTS or conf.env.WITH_UNIT_TESTS:
        conf.check_boost(lib='unit_test_framework', mt=True, uselib_store='BOOST_TESTS')

    if conf.env.WITH_TOOLS:
        conf.check_boost(lib='program_options', mt=True, uselib_store='BOOST_TOOLS')

    conf.check_compiler_flags()

    # Loading "late" to prevent tests from being compiled with profiling flags
    conf.load('coverage')
    conf.load('sanitizers')

    if not conf.env.enable_static:
        # If there happens to be a static library, waf will put the corresponding -L flags
        # before dynamic library flags.  This can result in compilation failure when the
        # system has a different version of the ndn-cxx library installed.
        conf.env.prepend_value('STLIBPATH', ['.'])

    conf.define_cond('HAVE_STACKTRACE', conf.env.HAVE_STACKTRACE)
    conf.define_cond('WITH_TESTS', conf.env.WITH_INTEGRATION_TESTS or conf.env.WITH_UNIT_TESTS)
    conf.define_cond('WITH_OSX_KEYCHAIN', conf.env.HAVE_OSX_FRAMEWORKS and conf.options.with_osx_keychain)
    conf.define_cond('DISABLE_SQLITE3_FS_LOCKING', not conf.options.with_sqlite_locking)
    conf.define('SYSCONFDIR', conf.env.SYSCONFDIR)
    # The config header will contain all defines that were added using conf.define()
    # or conf.define_cond().  Everything that was added directly to conf.env.DEFINES
    # will not appear in the config header, but will instead be passed directly to the
    # compiler on the command line.
    conf.write_config_header('ndn-cxx/detail/config.hpp', define_prefix='NDN_CXX_')

def build(bld):
    version(bld)

    bld(features='subst',
        name='version.hpp',
        source='ndn-cxx/version.hpp.in',
        target='ndn-cxx/version.hpp',
        install_path='${INCLUDEDIR}/ndn-cxx',
        VERSION_STRING=VERSION_BASE,
        VERSION_BUILD=VERSION,
        VERSION=int(VERSION_SPLIT[0]) * 1000000 +
                int(VERSION_SPLIT[1]) * 1000 +
                int(VERSION_SPLIT[2]),
        VERSION_MAJOR=VERSION_SPLIT[0],
        VERSION_MINOR=VERSION_SPLIT[1],
        VERSION_PATCH=VERSION_SPLIT[2])

    if bld.env.HAVE_OSX_FRAMEWORKS:
        # Need to disable precompiled headers for Objective-C++ code
        bld(features='cxx',
            target='ndn-cxx-mm-objects',
            source=bld.path.ant_glob('ndn-cxx/**/*-osx.mm'),
            use='BOOST PTHREAD OSX_COREFOUNDATION OSX_SECURITY OSX_SYSTEMCONFIGURATION OSX_FOUNDATION OSX_COREWLAN',
            includes='.')

    libndn_cxx = dict(
        target='ndn-cxx',
        source=bld.path.ant_glob('ndn-cxx/**/*.cpp',
                                 excl=['ndn-cxx/**/*-android.cpp',
                                       'ndn-cxx/**/*-osx.cpp',
                                       'ndn-cxx/**/*-sqlite3.cpp',
                                       'ndn-cxx/**/*netlink*.cpp']),
        features='pch',
        headers='ndn-cxx/impl/common-pch.hpp',
        use='ndn-cxx-mm-objects version BOOST OPENSSL SQLITE3 ATOMIC RT PTHREAD',
        includes='.',
        export_includes='.',
        install_path='${LIBDIR}')

    if bld.env.HOST == 'android':
        libndn_cxx['source'] += bld.path.ant_glob('ndn-cxx/**/*-android.cpp')

    if bld.env.HAVE_OSX_FRAMEWORKS:
        libndn_cxx['source'] += bld.path.ant_glob('ndn-cxx/**/*-osx.cpp')
        libndn_cxx['use'] += ' OSX_COREFOUNDATION OSX_SECURITY OSX_SYSTEMCONFIGURATION OSX_FOUNDATION OSX_COREWLAN'

    # In case we want to make it optional later
    libndn_cxx['source'] += bld.path.ant_glob('ndn-cxx/**/*-sqlite3.cpp')

    if bld.env.HAVE_NETLINK:
        libndn_cxx['source'] += bld.path.ant_glob('ndn-cxx/**/*netlink*.cpp')

    if bld.env.enable_shared:
        bld.shlib(
            name='ndn-cxx',
            vnum=VERSION_BASE,
            cnum=VERSION_BASE,
            **libndn_cxx)

    if bld.env.enable_static:
        bld.stlib(
            name='ndn-cxx-static' if bld.env.enable_shared else 'ndn-cxx',
            **libndn_cxx)

    bld.recurse('tests')

    if bld.env.WITH_TOOLS:
        bld.recurse('tools')

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

    # Install header files
    headers = bld.path.ant_glob('ndn-cxx/**/*.hpp',
                                excl=['ndn-cxx/**/*-android.hpp',
                                      'ndn-cxx/**/*-osx.hpp',
                                      'ndn-cxx/**/*-sqlite3.hpp',
                                      'ndn-cxx/**/*netlink*.hpp',
                                      'ndn-cxx/**/impl/**/*'])

    if bld.env.HOST == 'android':
        headers += bld.path.ant_glob('ndn-cxx/**/*-android.hpp', excl='ndn-cxx/**/impl/**/*')

    if bld.env.HAVE_OSX_FRAMEWORKS:
        headers += bld.path.ant_glob('ndn-cxx/**/*-osx.hpp', excl='ndn-cxx/**/impl/**/*')

    # In case we want to make it optional later
    headers += bld.path.ant_glob('ndn-cxx/**/*-sqlite3.hpp', excl='ndn-cxx/**/impl/**/*')

    if bld.env.HAVE_NETLINK:
        headers += bld.path.ant_glob('ndn-cxx/**/*netlink*.hpp', excl='ndn-cxx/**/impl/**/*')

    bld.install_files('${INCLUDEDIR}', headers, relative_trick=True)
    bld.install_files('${INCLUDEDIR}/ndn-cxx/detail', 'ndn-cxx/detail/config.hpp')

    # Prepare flags that should go into pkgconfig file
    pkgconfig_libs = []
    pkgconfig_ldflags = []
    pkgconfig_linkflags = []
    pkgconfig_includes = []
    pkgconfig_cxxflags = []
    pkgconfig_defines = []
    for lib in Utils.to_list(libndn_cxx['use']):
        if bld.env[f'LIB_{lib}']:
            pkgconfig_libs += Utils.to_list(bld.env[f'LIB_{lib}'])
        if bld.env[f'LIBPATH_{lib}']:
            pkgconfig_ldflags += Utils.to_list(bld.env[f'LIBPATH_{lib}'])
        if bld.env[f'LINKFLAGS_{lib}']:
            pkgconfig_linkflags += Utils.to_list(bld.env[f'LINKFLAGS_{lib}'])
        if bld.env[f'INCLUDES_{lib}']:
            pkgconfig_includes += Utils.to_list(bld.env[f'INCLUDES_{lib}'])
        if bld.env[f'CXXFLAGS_{lib}']:
            pkgconfig_cxxflags += Utils.to_list(bld.env[f'CXXFLAGS_{lib}'])
        if bld.env[f'DEFINES_{lib}']:
            pkgconfig_defines += Utils.to_list(bld.env[f'DEFINES_{lib}'])

    EXTRA_FRAMEWORKS = '-framework CoreFoundation -framework Security -framework SystemConfiguration -framework Foundation -framework CoreWLAN'

    def uniq(alist):
        return list(dict.fromkeys(alist))

    bld(features='subst',
        source='libndn-cxx.pc.in',
        target='libndn-cxx.pc',
        install_path='${LIBDIR}/pkgconfig',
        VERSION=VERSION_BASE,
        # This probably not the right thing to do, but to simplify life of apps
        # that use the library
        EXTRA_LIBS=' '.join([f'-l{i}' for i in uniq(pkgconfig_libs)]),
        EXTRA_LDFLAGS=' '.join([f'-L{i}' for i in uniq(pkgconfig_ldflags)]),
        EXTRA_LINKFLAGS=' '.join(uniq(pkgconfig_linkflags)),
        EXTRA_INCLUDES=' '.join([f'-I{i}' for i in uniq(pkgconfig_includes)]),
        EXTRA_CXXFLAGS=' '.join(uniq(pkgconfig_cxxflags) + [f'-D{i}' for i in uniq(pkgconfig_defines)]),
        EXTRA_FRAMEWORKS=EXTRA_FRAMEWORKS if bld.env.HAVE_OSX_FRAMEWORKS else '')

    # Install sample config
    bld.install_files('${SYSCONFDIR}/ndn', 'client.conf.sample')

    if bld.env.SPHINX_BUILD:
        bld(features='sphinx',
            name='manpages',
            builder='man',
            config='docs/conf.py',
            outdir='docs/manpages',
            source=bld.path.ant_glob('docs/manpages/*.rst'),
            install_path='${MANDIR}',
            version=VERSION_BASE,
            release=VERSION)

def docs(bld):
    from waflib import Options
    Options.commands = ['doxygen', 'sphinx'] + Options.commands

def doxygen(bld):
    version(bld)

    if not bld.env.DOXYGEN:
        bld.fatal('Cannot build documentation ("doxygen" not found in PATH)')

    bld(features='subst',
        name='doxygen.conf',
        source=['docs/doxygen.conf.in',
                'docs/named_data_theme/named_data_footer-with-analytics.html.in'],
        target=['docs/doxygen.conf',
                'docs/named_data_theme/named_data_footer-with-analytics.html'],
        VERSION=VERSION,
        HAVE_DOT='YES' if bld.env.DOT else 'NO',
        HTML_FOOTER='../build/docs/named_data_theme/named_data_footer-with-analytics.html' \
                        if os.getenv('GOOGLE_ANALYTICS', None) \
                        else '../docs/named_data_theme/named_data_footer.html',
        GOOGLE_ANALYTICS=os.getenv('GOOGLE_ANALYTICS', ''))

    bld(features='doxygen',
        doxyfile='docs/doxygen.conf',
        use='doxygen.conf')

def sphinx(bld):
    version(bld)

    if not bld.env.SPHINX_BUILD:
        bld.fatal('Cannot build documentation ("sphinx-build" not found in PATH)')

    bld(features='sphinx',
        config='docs/conf.py',
        outdir='docs',
        source=bld.path.ant_glob('docs/**/*.rst'),
        version=VERSION_BASE,
        release=VERSION)

def version(ctx):
    # don't execute more than once
    if getattr(Context.g_module, 'VERSION_BASE', None):
        return

    Context.g_module.VERSION_BASE = Context.g_module.VERSION
    Context.g_module.VERSION_SPLIT = VERSION_BASE.split('.')

    # first, try to get a version string from git
    version_from_git = ''
    try:
        cmd = ['git', 'describe', '--abbrev=8', '--always', '--match', f'{GIT_TAG_PREFIX}*']
        version_from_git = subprocess.run(cmd, capture_output=True, check=True, text=True).stdout.strip()
        if version_from_git:
            if GIT_TAG_PREFIX and version_from_git.startswith(GIT_TAG_PREFIX):
                Context.g_module.VERSION = version_from_git[len(GIT_TAG_PREFIX):]
            elif not GIT_TAG_PREFIX and ('.' in version_from_git or '-' in version_from_git):
                Context.g_module.VERSION = version_from_git
            else:
                # no tags matched (or we are in a shallow clone)
                Context.g_module.VERSION = f'{VERSION_BASE}+git.{version_from_git}'
    except (OSError, subprocess.SubprocessError):
        pass

    # fallback to the VERSION.info file, if it exists and is not empty
    version_from_file = ''
    version_file = ctx.path.find_node('VERSION.info')
    if version_file is not None:
        try:
            version_from_file = version_file.read().strip()
        except OSError as e:
            Logs.warn(f'{e.filename} exists but is not readable ({e.strerror})')
    if version_from_file and not version_from_git:
        Context.g_module.VERSION = version_from_file
        return

    # update VERSION.info if necessary
    if version_from_file == Context.g_module.VERSION:
        # already up-to-date
        return
    if version_file is None:
        version_file = ctx.path.make_node('VERSION.info')
    try:
        version_file.write(Context.g_module.VERSION)
    except OSError as e:
        Logs.warn(f'{e.filename} is not writable ({e.strerror})')

def dist(ctx):
    ctx.algo = 'tar.xz'
    version(ctx)

def distcheck(ctx):
    ctx.algo = 'tar.xz'
    version(ctx)