##############################################################################
# Copyright (c) 2013-2018, Lawrence Livermore National Security, LLC.
# Produced at the Lawrence Livermore National Laboratory.
#
# This file is part of Spack.
# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
# LLNL-CODE-647188
#
# For details, see https://github.com/spack/spack
# Please also see the NOTICE and LICENSE files for our notice and the LGPL.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License (as
# published by the Free Software Foundation) version 2.1, February 1999.
#
# This program 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 terms and
# conditions of the GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##############################################################################
from __future__ import print_function

import argparse
import sys

import llnl.util.tty as tty

import spack
import spack.cmd
import spack.cmd.common.arguments as arguments

description = "show what would be installed, given a spec"
section = "build"
level = "short"


def setup_parser(subparser):
    arguments.add_common_arguments(subparser, ['long', 'very_long'])
    subparser.add_argument(
        '-y', '--yaml', action='store_true', default=False,
        help='print concrete spec as YAML')
    subparser.add_argument(
        '-c', '--cover', action='store',
        default='nodes', choices=['nodes', 'edges', 'paths'],
        help='how extensively to traverse the DAG (default: nodes)')
    subparser.add_argument(
        '-N', '--namespaces', action='store_true', default=False,
        help='show fully qualified package names')
    subparser.add_argument(
        '-I', '--install-status', action='store_true', default=False,
        help='show install status of packages. packages can be: '
             'installed [+], missing and needed by an installed package [-], '
             'or not installed (no annotation)')
    subparser.add_argument(
        '-t', '--types', action='store_true', default=False,
        help='show dependency types')
    subparser.add_argument(
        'specs', nargs=argparse.REMAINDER, help="specs of packages")


def spec(parser, args):
    name_fmt = '$.' if args.namespaces else '$_'
    kwargs = {'cover': args.cover,
              'format': name_fmt + '$@$%@+$+$=',
              'hashlen': None if args.very_long else 7,
              'show_types': args.types,
              'install_status': args.install_status}

    if not args.specs:
        tty.die("spack spec requires at least one spec")

    for spec in spack.cmd.parse_specs(args.specs):
        # With -y, just print YAML to output.
        if args.yaml:
            if spec.name in spack.repo.path or spec.virtual:
                spec.concretize()

            # use write because to_yaml already has a newline.
            sys.stdout.write(spec.to_yaml())
            continue

        kwargs['hashes'] = False  # Always False for input spec
        print("Input spec")
        print("--------------------------------")
        print(spec.tree(**kwargs))

        kwargs['hashes'] = args.long or args.very_long
        print("Concretized")
        print("--------------------------------")
        spec.concretize()
        print(spec.tree(**kwargs))
