import unittest

from zope.testing.cleanup import cleanUp

class BaseTest(object):
    def setUp(self):
        cleanUp()

    def tearDown(self):
        cleanUp()

    def _registerView(self, app, name, *for_):
        import zope.component
        gsm = zope.component.getGlobalSiteManager()
        from repoze.bfg.interfaces import IView
        gsm.registerAdapter(app, for_, IView, name)

    def _registerPermission(self, permission, name, *for_):
        import zope.component
        gsm = zope.component.getGlobalSiteManager()
        from repoze.bfg.interfaces import IViewPermission
        gsm.registerAdapter(permission, for_, IViewPermission, name)

    def _registerSecurityPolicy(self, secpol):
        import zope.component
        gsm = zope.component.getGlobalSiteManager()
        from repoze.bfg.interfaces import ISecurityPolicy
        gsm.registerUtility(secpol, ISecurityPolicy)

    def _makeEnviron(self, **extras):
        environ = {
            'wsgi.url_scheme':'http',
            'wsgi.version':(1,0),
            'SERVER_NAME':'localhost',
            'SERVER_PORT':'8080',
            'REQUEST_METHOD':'GET',
            }
        environ.update(extras)
        return environ

class RenderViewToResponseTests(BaseTest, unittest.TestCase):
    def _callFUT(self, *arg, **kw):
        from repoze.bfg.view import render_view_to_response
        return render_view_to_response(*arg, **kw)
    
    def test_call_no_view_registered(self):
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        context = DummyContext()
        result = self._callFUT(context, request, name='notregistered')
        self.assertEqual(result, None)

    def test_call_view_registered_secure_permission_disallows(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = DummyResponse()
        secpol = DummySecurityPolicy()
        permissionfactory = make_permission_factory(False)
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        self._registerSecurityPolicy(secpol)
        self._registerPermission(permissionfactory, 'registered', IContext,
                                 IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        from repoze.bfg.security import Unauthorized
        self.assertRaises(Unauthorized, self._callFUT, context, request,
                          name='registered', secure=True)

    def test_call_view_registered_secure_permission_allows(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = DummyResponse()
        secpol = DummySecurityPolicy()
        permissionfactory = make_permission_factory(True)
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        self._registerSecurityPolicy(secpol)
        self._registerPermission(permissionfactory, 'registered', IContext,
                                 IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        response = self._callFUT(context, request, name='registered',
                                 secure=True)
        self.assertEqual(response.status, '200 OK')

    def test_call_view_registered_insecure_permission_disallows(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = DummyResponse()
        secpol = DummySecurityPolicy()
        permissionfactory = make_permission_factory(False)
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        self._registerSecurityPolicy(secpol)
        self._registerPermission(permissionfactory, 'registered', IContext,
                                 IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        response = self._callFUT(context, request, name='registered',
                                 secure=False)
        self.assertEqual(response.status, '200 OK')


    def test_call_view_response_doesnt_implement_IResponse(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = 'abc'
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        self.assertRaises(ValueError, self._callFUT, context, request,
                          name='registered', secure=False)


class RenderViewToIterableTests(BaseTest, unittest.TestCase):
    def _callFUT(self, *arg, **kw):
        from repoze.bfg.view import render_view_to_iterable
        return render_view_to_iterable(*arg, **kw)
    
    def test_call_no_view_registered(self):
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        context = DummyContext()
        result = self._callFUT(context, request, name='notregistered')
        self.assertEqual(result, None)

    def test_call_view_registered_secure_permission_disallows(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = DummyResponse()
        secpol = DummySecurityPolicy()
        permissionfactory = make_permission_factory(False)
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        self._registerSecurityPolicy(secpol)
        self._registerPermission(permissionfactory, 'registered', IContext,
                                 IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        from repoze.bfg.security import Unauthorized
        self.assertRaises(Unauthorized, self._callFUT, context, request,
                          name='registered', secure=True)

    def test_call_view_registered_secure_permission_allows(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = DummyResponse()
        secpol = DummySecurityPolicy()
        permissionfactory = make_permission_factory(True)
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        self._registerSecurityPolicy(secpol)
        self._registerPermission(permissionfactory, 'registered', IContext,
                                 IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        iterable = self._callFUT(context, request, name='registered',
                                 secure=True)
        self.assertEqual(iterable, ())

    def test_call_view_registered_insecure_permission_disallows(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = DummyResponse()
        secpol = DummySecurityPolicy()
        permissionfactory = make_permission_factory(False)
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        self._registerSecurityPolicy(secpol)
        self._registerPermission(permissionfactory, 'registered', IContext,
                                 IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        iterable = self._callFUT(context, request, name='registered',
                                 secure=False)
        self.assertEqual(iterable, ())

    def test_call_view_response_doesnt_implement_IResponse(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = 'abc'
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        self.assertRaises(ValueError, self._callFUT, context, request,
                          name='registered', secure=False)

class RenderViewTests(unittest.TestCase, BaseTest):
    def _callFUT(self, *arg, **kw):
        from repoze.bfg.view import render_view
        return render_view(*arg, **kw)
    
    def test_call_no_view_registered(self):
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        context = DummyContext()
        result = self._callFUT(context, request, name='notregistered')
        self.assertEqual(result, None)

    def test_call_view_registered_secure_permission_disallows(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = DummyResponse()
        secpol = DummySecurityPolicy()
        permissionfactory = make_permission_factory(False)
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        self._registerSecurityPolicy(secpol)
        self._registerPermission(permissionfactory, 'registered', IContext,
                                 IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        from repoze.bfg.security import Unauthorized
        self.assertRaises(Unauthorized, self._callFUT, context, request,
                          name='registered', secure=True)

    def test_call_view_registered_secure_permission_allows(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = DummyResponse()
        secpol = DummySecurityPolicy()
        permissionfactory = make_permission_factory(True)
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        self._registerSecurityPolicy(secpol)
        self._registerPermission(permissionfactory, 'registered', IContext,
                                 IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        s = self._callFUT(context, request, name='registered', secure=True)
        self.assertEqual(s, '')

    def test_call_view_registered_insecure_permission_disallows(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = DummyResponse()
        secpol = DummySecurityPolicy()
        permissionfactory = make_permission_factory(False)
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        self._registerSecurityPolicy(secpol)
        self._registerPermission(permissionfactory, 'registered', IContext,
                                 IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        s = self._callFUT(context, request, name='registered', secure=False)
        self.assertEqual(s, '')

    def test_call_view_response_doesnt_implement_IResponse(self):
        context = DummyContext()
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        directlyProvides(context, IContext)
        response = 'abc'
        view = make_view(response)
        self._registerView(view, 'registered', IContext, IRequest)
        environ = self._makeEnviron()
        from webob import Request
        request = Request(environ)
        directlyProvides(request, IRequest)
        self.assertRaises(ValueError, self._callFUT, context, request,
                          name='registered', secure=False)

class TestIsResponse(unittest.TestCase):
    def _callFUT(self, *arg, **kw):
        from repoze.bfg.view import is_response
        return is_response(*arg, **kw)

    def test_is(self):
        response = DummyResponse()
        self.assertEqual(self._callFUT(response), True)

    def test_isnt(self):
        response = None
        self.assertEqual(self._callFUT(response), False)

    def test_partial_inst(self):
        response = DummyResponse()
        response.app_iter = None
        self.assertEqual(self._callFUT(response), False)
        
    def test_status_not_string(self):
        response = DummyResponse()
        response.status = None
        self.assertEqual(self._callFUT(response), False)

class TestViewExecutionPermitted(unittest.TestCase):
    def setUp(self):
        cleanUp()

    def tearDown(self):
        cleanUp()

    def _callFUT(self, *arg, **kw):
        from repoze.bfg.view import view_execution_permitted
        return view_execution_permitted(*arg, **kw)

    def _registerSecurityPolicy(self, secpol):
        import zope.component
        gsm = zope.component.getGlobalSiteManager()
        from repoze.bfg.interfaces import ISecurityPolicy
        gsm.registerUtility(secpol, ISecurityPolicy)

    def _registerPermission(self, permission, name, *for_):
        import zope.component
        gsm = zope.component.getGlobalSiteManager()
        from repoze.bfg.interfaces import IViewPermission
        gsm.registerAdapter(permission, for_, IViewPermission, name)

    def test_no_secpol(self):
        context = DummyContext()
        request = DummyRequest()
        result = self._callFUT(context, request, '')
        msg = result.msg
        self.failUnless("Allowed: view name '' in context" in msg)
        self.failUnless('(no security policy in use)' in msg)
        self.assertEqual(result, True)

    def test_secpol_no_permission(self):
        secpol = DummySecurityPolicy()
        self._registerSecurityPolicy(secpol)
        context = DummyContext()
        request = DummyRequest()
        result = self._callFUT(context, request, '')
        msg = result.msg
        self.failUnless("Allowed: view name '' in context" in msg)
        self.failUnless("(no permission registered for name '')" in msg)
        self.assertEqual(result, True)

    def test_secpol_and_permission(self):
        from zope.interface import Interface
        from zope.interface import directlyProvides
        from repoze.bfg.interfaces import IRequest
        class IContext(Interface):
            pass
        context = DummyContext()
        directlyProvides(context, IContext)
        permissionfactory = make_permission_factory(True)
        self._registerPermission(permissionfactory, '', IContext,
                                 IRequest)
        secpol = DummySecurityPolicy()
        self._registerSecurityPolicy(secpol)
        request = DummyRequest()
        directlyProvides(request, IRequest)
        result = self._callFUT(context, request, '')
        self.failUnless(result is True)

class TestStaticView(unittest.TestCase, BaseTest):
    def setUp(self):
        cleanUp()

    def tearDown(self):
        cleanUp()

    def _getTargetClass(self):
        from repoze.bfg.view import static
        return static

    def _makeOne(self, path):
        return self._getTargetClass()(path)
        
    def test_abspath(self):
        import os
        path = os.path.dirname(__file__)
        view = self._makeOne(path)
        context = DummyContext()
        request = DummyRequest()
        request.subpath = ['__init__.py']
        request.environ = self._makeEnviron()
        response = view(context, request)
        self.assertEqual(request.copied, True)
        self.assertEqual(response.directory, path)

    def test_relpath(self):
        import os
        path = 'fixtures'
        view = self._makeOne(path)
        context = DummyContext()
        request = DummyRequest()
        request.subpath = ['__init__.py']
        request.environ = self._makeEnviron()
        response = view(context, request)
        self.assertEqual(request.copied, True)
        here = os.path.abspath(os.path.dirname(__file__))
        abspath = os.path.join(here, 'fixtures')
        self.assertEqual(response.directory, abspath)

class TestBFGViewDecorator(unittest.TestCase):
    def setUp(self):
        cleanUp()

    def tearDown(self):
        cleanUp()

    def _getTargetClass(self):
        from repoze.bfg.view import bfg_view
        return bfg_view

    def _makeOne(self, *arg, **kw):
        return self._getTargetClass()(*arg, **kw)

    def test_create_defaults(self):
        from repoze.bfg.interfaces import IRequest
        from zope.interface import Interface
        decorator = self._makeOne()
        self.assertEqual(decorator.name, '')
        self.assertEqual(decorator.request_type, IRequest)
        self.assertEqual(decorator.for_, Interface)
        self.assertEqual(decorator.permission, None)
        
    def test_create_nondefaults(self):
        decorator = self._makeOne(name=None, request_type=None, for_=None,
                                  permission='foo')
        self.assertEqual(decorator.name, None)
        self.assertEqual(decorator.request_type, None)
        self.assertEqual(decorator.for_, None)
        self.assertEqual(decorator.permission, 'foo')
        
    def test_call(self):
        from repoze.bfg.interfaces import IRequest
        from zope.interface import Interface
        decorator = self._makeOne()
        class foo:
            """ docstring """
        wrapped = decorator(foo)
        self.assertEqual(wrapped.__is_bfg_view__, True)
        self.assertEqual(wrapped.__permission__, None)
        self.assertEqual(wrapped.__for__, Interface)
        self.assertEqual(wrapped.__request_type__, IRequest)
        self.assertEqual(wrapped.__grok_module__, foo.__module__)
        self.assertEqual(wrapped.__name__, foo.__name__)
        self.assertEqual(wrapped.__doc__, foo.__doc__)
        for k, v in foo.__dict__.items():
            self.assertEqual(v, wrapped.__dict__[k])

class DummyContext:
    pass

class DummyRequest:
    def get_response(self, application):
        return application

    def copy(self):
        self.copied = True
        return self

def make_view(response):
    def view(context, request):
        return response
    return view

def make_permission_factory(result):
    class DummyPermissionFactory:
        def __init__(self, context, request):
            self.context = context
            self.request = request

        def __call__(self, secpol):
            self.__class__.checked_with = secpol
            return result

    return DummyPermissionFactory

class DummyResponse:
    status = '200 OK'
    headerlist = ()
    app_iter = ()
    
class DummySecurityPolicy:
    pass