# Copyright 2015 The Meson development team

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

'''This module provides helper functions for RPM related
functionality such as generating RPM spec file.'''

import build
import compilers
import datetime
import mlog
import os

class RPMModule:

    def generate_spec_template(self, state, args, kwargs):
        compiler_deps = set()
        for compiler in state.compilers:
            if isinstance(compiler, compilers.ValaCompiler):
                compiler_deps.add('vala')
            elif isinstance(compiler, compilers.GnuFortranCompiler):
                compiler_deps.add('gcc-gfortran')
            elif isinstance(compiler, compilers.GnuObjCCompiler):
                compiler_deps.add('gcc-objc')
            elif compiler == compilers.GnuObjCPPCompiler:
                compiler_deps.add('gcc-objc++')
            elif isinstance(compiler, compilers.GnuCCompiler) or \
                    isinstance(compiler, compilers.GnuCPPCompiler):
                # Installed by default
                pass
            else:
                mlog.log('RPM spec file will not created, generating not allowed for:',
                         mlog.bold(compiler.get_id()))
                return
        proj = state.project_name.replace(' ', '_').replace('\t', '_')
        so_installed = False
        devel_subpkg = False
        files = []
        files_devel = []
        to_delete = []
        for target in state.targets.values():
            if isinstance(target, build.Executable) and target.need_install:
                files.append('%%{_bindir}/%s' % target.get_filename())
            elif isinstance(target, build.SharedLibrary) and target.need_install:
                files.append('%%{_libdir}/%s' % target.get_filename())
                for alias in target.get_aliaslist():
                    if alias.endswith('.so'):
                        files_devel.append('%%{_libdir}/%s' % alias)
                    else:
                        files.append('%%{_libdir}/%s' % alias)
                so_installed = True
            elif isinstance(target, build.StaticLibrary) and target.need_install:
                to_delete.append('%%{buildroot}%%{_libdir}/%s' % target.get_filename())
                mlog.log('Warning, removing', mlog.bold(target.get_filename()),
                         'from package because packaging static libs not recommended')
        if len(files_devel) > 0:
            devel_subpkg = True
        fn = open('%s.spec' % os.path.join(state.environment.get_build_dir(), proj),
                  'w+')
        fn.write('Name: %s\n' % proj)
        fn.write('\n')
        for compiler in compiler_deps:
            fn.write('BuildRequires: %s\n' % compiler)
        for dep in state.environment.coredata.deps:
            fn.write('BuildRequires: pkgconfig(%s)\n' % dep)
        for lib in state.environment.coredata.ext_libs.values():
            fn.write('BuildRequires: %s # FIXME\n' % lib.fullpath)
            mlog.log('Warning, replace', mlog.bold(lib.fullpath), 'with real package.',
                     'You can use following command to find package which contains this lib:',
                     mlog.bold('dnf provides %s' % lib.fullpath))
        for prog in state.environment.coredata.ext_progs.values():
            fn.write('BuildRequires: %s\n' % ' '.join(prog.fullpath))
        fn.write('BuildRequires: meson\n')
        fn.write('\n')
        fn.write('%description\n')
        fn.write('\n')
        if devel_subpkg:
            fn.write('%package devel\n')
            fn.write('Summary: Development files for %{name}\n')
            fn.write('Requires: %{name}%{?_isa} = %{version}-%{release}\n')
            fn.write('\n')
            fn.write('%description devel\n')
            fn.write('Development files for %{name}\n')
            fn.write('\n')
        fn.write('%prep\n')
        fn.write('%autosetup\n')
        fn.write('rm -rf rpmbuilddir && mkdir rpmbuilddir\n')
        fn.write('echo "#!/bin/bash" > rpmbuilddir/configure && chmod +x rpmbuilddir/configure\n')
        fn.write('\n')
        fn.write('%build\n')
        fn.write('pushd rpmbuilddir\n')
        fn.write('  %configure\n')
        fn.write('  meson .. --buildtype=plain\n')
        fn.write('  ninja-build -v\n')
        fn.write('popd\n')
        fn.write('\n')
        fn.write('%install\n')
        fn.write('pushd rpmbuilddir\n')
        fn.write('  DESTDIR=%{buildroot} ninja-build -v install\n')
        fn.write('popd\n')
        if len(to_delete) > 0:
            fn.write('rm -rf %s\n' % ' '.join(to_delete))
        fn.write('\n')
        fn.write('%check\n')
        fn.write('pushd rpmbuilddir\n')
        fn.write('  ninja-build -v test\n')
        fn.write('popd\n')
        fn.write('\n')
        fn.write('%files\n')
        for f in files:
            fn.write('%s\n' % f)
        fn.write('\n')
        if devel_subpkg:
            fn.write('%files devel\n')
            for f in files_devel:
                fn.write('%s\n' % f)
        fn.write('\n')
        if so_installed:
                fn.write('%post -p /sbin/ldconfig\n')
                fn.write('\n')
                fn.write('%postun -p /sbin/ldconfig\n')
        fn.write('\n')
        fn.write('%changelog\n')
        fn.write('* %s meson <meson@example.com> - \n' % datetime.date.today().strftime('%a %b %d %Y'))
        fn.write('- \n')
        fn.write('\n')
        fn.close()

def initialize():
    return RPMModule()