from zope.interface import implements
from zope.component import adapts, getUtility

from zope.traversing.interfaces import ITraversable
from zope.publisher.interfaces.browser import IBrowserRequest

from plone.contentrules.engine.interfaces import IRuleStorage
from plone.contentrules.rule.interfaces import IRule

from Products.CMFCore.interfaces import ISiteRoot


class RuleNamespace(object):
    """Used to traverse to a rule.

    Traversing to portal/++rule++foo will retrieve the rule with id 'foo'
    stored in context, acquisition-wrapped.
    """
    implements(ITraversable)
    adapts(ISiteRoot, IBrowserRequest)

    def __init__(self, context, request=None):
        self.context = context
        self.request = request

    def traverse(self, name, ignore):
        manager = getUtility(IRuleStorage)
        return manager[name]


class RuleConditionNamespace(object):
    """Used to traverse to a rule condition

    Traversing to portal/++rule++foo/++condition++1 will retrieve the second
    condition of the rule rule with id 'foo', acquisition-wrapped.
    """
    implements(ITraversable)
    adapts(IRule, IBrowserRequest)

    def __init__(self, context, request=None):
        self.context = context
        self.request = request

    def traverse(self, name, ignore):
        condition = self.context.conditions[int(name)]
        traversal_id = "++condition++%s" % name
        if condition.id != traversal_id:
            condition.__name__ = condition.id = traversal_id
        return condition


class RuleActionNamespace(object):
    """Used to traverse to a rule condition

    Traversing to portal/++rule++foo/++action++1 will retrieve the second
    condition of the rule rule with id 'foo', acquisition-wrapped.
    """
    implements(ITraversable)
    adapts(IRule, IBrowserRequest)

    def __init__(self, context, request=None):
        self.context = context
        self.request = request

    def traverse(self, name, ignore):
        action = self.context.actions[int(name)]
        traversal_id = "++action++%s" % name
        if action.id != traversal_id:
            action.__name__ = action.id = traversal_id
        return action