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

from _emerge.DepPriority import DepPriority


class DepPrioritySatisfiedRange:
    """
    DepPriority                         Index      Category

    not satisfied and buildtime                    HARD
    not satisfied and runtime              7       MEDIUM
    satisfied and buildtime_slot_op        6       MEDIUM_SOFT
    satisfied and buildtime                5       MEDIUM_SOFT
    satisfied and runtime                  4       MEDIUM_SOFT
    runtime_post                           3       MEDIUM_POST
    satisfied and runtime_post             2       MEDIUM_POST
    optional                               1       SOFT
    (none of the above)                    0       NONE
    """

    MEDIUM = 7
    MEDIUM_SOFT = 6
    MEDIUM_POST = 3
    SOFT = 1
    NONE = 0

    @classmethod
    def _ignore_optional(cls, priority):
        if priority.__class__ is not DepPriority:
            return False
        return bool(priority.optional)

    @classmethod
    def _ignore_satisfied_runtime_post(cls, priority):
        if priority.__class__ is not DepPriority:
            return False
        if priority.optional:
            return True
        if not priority.satisfied:
            return False
        if priority.buildtime or priority.runtime:
            return False
        return bool(priority.runtime_post)

    @classmethod
    def _ignore_runtime_post(cls, priority):
        if priority.__class__ is not DepPriority:
            return False
        if priority.optional:
            return True
        if priority.buildtime or priority.runtime:
            return False
        return bool(priority.runtime_post)

    @classmethod
    def _ignore_satisfied_runtime(cls, priority):
        if priority.__class__ is not DepPriority:
            return False
        if priority.optional:
            return True
        if priority.buildtime:
            return False
        if not priority.runtime:
            return True
        return bool(priority.satisfied)

    @classmethod
    def _ignore_satisfied_buildtime(cls, priority):
        if priority.__class__ is not DepPriority:
            return False
        if priority.optional:
            return True
        if priority.buildtime_slot_op:
            return False
        return bool(priority.satisfied)

    @classmethod
    def _ignore_satisfied_buildtime_slot_op(cls, priority):
        if priority.__class__ is not DepPriority:
            return False
        if priority.optional:
            return True
        if priority.satisfied:
            return True
        return not priority.buildtime and not priority.runtime

    @classmethod
    def _ignore_runtime(cls, priority):
        if priority.__class__ is not DepPriority:
            return False
        return bool(priority.satisfied or priority.optional or not priority.buildtime)

    ignore_medium = _ignore_runtime
    ignore_medium_soft = _ignore_satisfied_buildtime_slot_op
    ignore_medium_post = _ignore_runtime_post
    ignore_medium_post_satisifed = _ignore_satisfied_runtime_post
    ignore_soft = _ignore_optional


DepPrioritySatisfiedRange.ignore_priority = (
    None,
    DepPrioritySatisfiedRange._ignore_optional,
    DepPrioritySatisfiedRange._ignore_satisfied_runtime_post,
    DepPrioritySatisfiedRange._ignore_runtime_post,
    DepPrioritySatisfiedRange._ignore_satisfied_runtime,
    DepPrioritySatisfiedRange._ignore_satisfied_buildtime,
    DepPrioritySatisfiedRange._ignore_satisfied_buildtime_slot_op,
    DepPrioritySatisfiedRange._ignore_runtime,
)