#!/usr/bin/env python3

#   Copyright 2013 Ben Longbons <b.r.longbons@gmail.com>
#
#   This file is part of The Mana World (Athena server)
#
#   attoconf is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   attoconf is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with attoconf.  If not, see <http://www.gnu.org/licenses/>.

import os
import sys

try:
    from attoconf.version import require_version
except ImportError:
    sys.exit('attoconf missing - please run: git submodule update --init')
else:
    try:
        require_version(0, 9)
    except SystemExit as e:
        e.code += '\nPlease run: git submodule update'
        raise

from attoconf.classy import add_slots
from attoconf.lib.c import Cxx
from attoconf.lib.install import Install
from attoconf.lib.config_hash import ConfigHash
from attoconf.lib.templates import Templates
from attoconf.types import enum, filepath, ShellList


yesno = enum('yes', 'no')

@add_slots
class Configuration(Cxx, Install, ConfigHash, Templates):
    def general(self):
        super(Configuration, self).general()
        home = os.path.expanduser('~')
        self.add_alias('--user', ['--prefix=%s' % home, '--enable-rpath=relative'],
                help='alias for --prefix=$HOME --enable-rpath=relative', hidden=False)
        self.add_alias('--dev', ['--user', '--enable-warnings', '--enable-abi'],
                help=None, hidden=False)

    def paths(self):
        super(Configuration, self).paths()

        self.add_option('--debugdir', init='/.',
                type=filepath, check=lambda build, DIR: None,
                help='root for split debug files (often /usr/lib/debug)', hidden=False,
                help_var='DIR')

    def features(self):
        super(Configuration, self).features()
        self.add_bool_feature('warnings', init='no',
                check=lambda build, ENABLE_WARNINGS: None,
                help='Enable warnings (for development)')
        self.add_bool_feature('abi', init='no',
                check=lambda build, ENABLE_ABI: None,
                help='Force a nonbuggy gcc ABI (for development)')
        self.add_bool_feature('cygwin-hacks', init='no',
                check=lambda build, ENABLE_CYGWIN_HACKS: None,
                help='Work around bugs in certain cygwin versions')
        self.add_bool_feature('debug', init='yes',
                check=lambda build, ENABLE_DEBUG: None,
                help='Install extra files useful for debugging')
        self.add_option('--enable-rpath', init='none',
                type=enum('none', 'relative', 'absolute'), check=lambda build, ENABLE_RPATH: None,
                help='Use rpaths to find libraries', hidden=False)
        self.add_bool_feature('shared', init='yes',
                check=lambda build, ENABLE_SHARED: None,
                help='Build shared libraries instead of static (required for debug, DOES NOT WORK WITH CLANG)')

    def vars(self):
        super(Configuration, self).vars()
        # Why submodule gtest?
        # 1) make test requires gtest-all.cc. This file is shipped by Ubuntu,
        #    but not by Gentoo;
        # 2) Modern distros ship gtest-1.13+. It requires C++14+, while
        #    TMWA is currently a C++0x codebase.
        self.add_option('GTEST_DIR',
                init=os.path.join(os.getcwd(), 'deps/googletest/googletest'),
                # http://code.google.com/p/googletest/wiki/FAQ#Why_is_it_not_recommended_to_install_a_pre-compiled_copy_of_Goog
                type=filepath, check=lambda build, GTEST_DIR: None,
                help='Location of Google Test sources, must contain src/gtest-all.cc (linking to a precompiled library is NOT supported)', hidden=False)
        self.add_option('GDB', init=['gdb'],
                type=ShellList, check=lambda build, GDB: None,
                help='debugger to run tests', hidden=False)

    def add_bool_feature(self, arg, hidden=False, **kwargs):
        positive = '--enable-' + arg
        negative = '--disable-' + arg
        self.add_option(positive, type=yesno, hidden=hidden, **kwargs)
        # TODO: instead reveal one of the aliases and hide the main
        # this requires messing with help slightly
        self.add_alias(positive, [positive + '=yes'], help=None, hidden=True)
        self.add_alias(negative, [positive + '=no'], help=None, hidden=True)


def main():
    srcdir = os.path.dirname(sys.argv[0])
    proj = Configuration(
            srcdir=srcdir,
            # Note that src/conf/version.hpp is made later, by Makefile.
            # See version.mk (included by Makefile).
            template_files=['Makefile', 'src/conf/install.hpp'],
    )
    proj.set_package('tmwa', 'The Mana World (Athena server)');
    proj.jiggle()
    build = proj.build('.')
    build.configure(sys.argv[1:], os.environ)


if __name__ == '__main__':
    main()