# -*- coding: utf-8 -*-

from argparse import Namespace, ArgumentParser

from ..Cmd import Cmd

# TODO: seems at least partly redundant to CmdPkgRequires / print_pkg_relations
class CmdRequiredOsPkg(Cmd): # export

    def __init__(self) -> None:
        super().__init__('required-os-pkg', help='List distribution packages required for a package')

    def add_arguments(self, parser: ArgumentParser) -> None:
        super().add_arguments(parser)
        parser.add_argument('module', nargs='*', help='Modules')
        parser.add_argument('--flavours', help='Dependency flavours', default='build')
        parser.add_argument('--skip-excluded', action='store_true', default=False,
            help='Output empty prerequisite list if module is excluded')

    def _run(self, args: Namespace) -> None:
        modules = args.module
        flavours = args.flavours.split()
        if 'build' in flavours and not 'run' in flavours:
            # TODO: This adds too much. Only the run dependencies of the build dependencies would be needed.
            flavours.append('run')
        self.app.debug("flavours = " + args.flavours)
        deps = self.app.get_modules_from_project_txt(modules, ['pkg.requires.jw'], flavours,
                scope = 2, add_self=True, names_only=True)
        if args.skip_excluded:
            for d in deps:
                if self.app.is_excluded_from_build(d) is not None:
                    deps.remove(d)
        subsecs = self.app.os_cascade()
        self.app.debug("subsecs = ", subsecs)
        requires = []
        for s in subsecs:
            for f in flavours:
                vals = self.app.collect_values(deps, 'pkg.requires.' + s, f)
                if vals:
                    requires = requires + vals
        # TODO: add all not in build tree as -devel
        r = ''
        for m in requires:
            r = r + ' ' + m
        print(r[1:])