# Copyright 2016, Tresys Technology, LLC
#
# This file is part of SETools.
#
# SETools 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, either version 2.1 of
# the License, or (at your option) any later version.
#
# SETools 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with SETools.  If not, see
# <http://www.gnu.org/licenses/>.
#
from collections import defaultdict
from itertools import chain

from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPalette, QTextCursor

from setools.policyrep.exception import NoCommon

from .details import DetailsPopup
from .models import SEToolsTableModel


def class_detail(parent, class_):
    """
    Create a dialog box for object class details.

    Parameters:
    parent      The parent Qt Widget
    class_      The type
    """

    detail = DetailsPopup(parent, "Object class detail: {0}".format(class_))

    try:
        common = class_.common
    except NoCommon:
        pass
    else:
        detail.append_header("Inherits: {0}\n".format(common))

        detail.append_header("Inherited permissions ({0}):".format(len(common.perms)))

        for p in sorted(common.perms):
            detail.append("    {0}".format(p))

        detail.append("\n")

    detail.append_header("Permissions ({0}):".format(len(class_.perms)))
    for p in sorted(class_.perms):
        detail.append("    {0}".format(p))

    detail.show()


class ObjClassTableModel(SEToolsTableModel):

    """Table-based model for object classes."""

    headers = defaultdict(str, {0: "Name", 1: "Permissions"})

    def data(self, index, role):
        if self.resultlist:
            row = index.row()
            col = index.column()
            item = self.resultlist[row]

            if role == Qt.DisplayRole:
                if col == 0:
                    return str(item)
                elif col == 1:
                    try:
                        com_perms = item.common.perms
                    except NoCommon:
                        com_perms = []

                    return ", ".join(sorted(str(p) for p in chain(com_perms, item.perms)))

            elif role == Qt.UserRole:
                return item