# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

from _emerge.AbstractDepPriority import AbstractDepPriority


class DepPriority(AbstractDepPriority):

    __slots__ = ("satisfied", "optional", "ignored")

    def __int__(self):
        """
        Note: These priorities are only used for measuring hardness
        in the circular dependency display via digraph.debug_print(),
        and nothing more. For actual merge order calculations, the
        measures defined by the DepPriorityNormalRange and
        DepPrioritySatisfiedRange classes are used.

        Attributes                            Hardness

        buildtime_slot_op                       0
        buildtime                              -1
        runtime                                -2
        runtime_post                           -3
        optional                               -4
        (none of the above)                    -5

        """

        if self.optional:
            return -4
        if self.buildtime_slot_op:
            return 0
        if self.buildtime:
            return -1
        if self.runtime:
            return -2
        if self.runtime_post:
            return -3
        return -5

    def __str__(self):
        if self.ignored:
            return "ignored"
        if self.optional:
            return "optional"
        if self.buildtime_slot_op:
            return "buildtime_slot_op"
        if self.buildtime:
            return "buildtime"
        if self.runtime_slot_op:
            return "runtime_slot_op"
        if self.runtime:
            return "runtime"
        if self.runtime_post:
            return "runtime_post"
        return "soft"