#!/usr/bin/env python3

#
# Copyright (c) 2024 Vojtech Horky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# pkg-config-like tool for HelenOS libraries
# HelenOS Cross Compiler Wrapper (XCW)
# Facilitate cross-compiling external software to HelenOS
#


import argparse
import os
import sys

# Package dependencies: always list only immediate dependencies so that
# we can get proper ordering for static libraries
CONFIG_DEPENDENCIES = {
    'libui': ['libdisplay', 'libcongfx', 'libgfxfont', 'libriff', 'libmemgfx', 'libconsole'],
    'libdisplay': ['libgfx', 'libipcgfx', 'libinput'],
    'libconsole': ['libinput', 'liboutput'],
    'libipcfgfx': ['libgfx'],
    'libgfximage': ['libpixconv'],
}

CONFIG_CFLAGS = {
}

CONFIG_LIBS = {
}

def get_with_dependencies(package, dependencies_first=True):
    deps = CONFIG_DEPENDENCIES.get(package, [])
    all_deps = [
        i
        for d in deps
        for i in get_with_dependencies(d, dependencies_first)
    ]
    result = (all_deps if dependencies_first else []) + [package] + ([] if dependencies_first else all_deps)
    seen = set()
    return [
        i
        for i in result
        if not (i in seen or seen.add(i))
    ]

def get_build_root():
    dn = lambda x : os.path.dirname(x)
    return dn(dn(dn(dn(os.path.abspath(sys.argv[0])))))

def main():
    args = argparse.ArgumentParser(description='pkg-config-like tool for HelenOS')
    args.add_argument(
        '--cflags',
        dest='cflags',
        action='store_true',
        default=False,
        help='Print required C compiler flags to stdout.'
    )
    args.add_argument(
        '--libs',
        dest='libs',
        action='store_true',
        default=False,
        help='Print required linker flags to stdout.'
    )
    args.add_argument('packages', metavar='PACKAGE', nargs='+')

    config = args.parse_args()

    export_dir = os.getenv('EXPORT_DIR', get_build_root() + '/export')

    result = []
    for package in config.packages:
        if config.cflags:
            for i in get_with_dependencies(package, False):
                if i in CONFIG_CFLAGS:
                    result.extend(CONFIG_CFLAGS[i])
                else:
                    result.append(f'-I{export_dir}/include/{i}')
        if config.libs:
            for i in get_with_dependencies(package, False):
                if i in CONFIG_LIBS:
                    result.extend(CONFIG_LIBS[i])
                else:
                    result.append(f'{export_dir}/lib/{i}.a')

    print(' '.join(result))


if __name__ == '__main__':
    main()