#!/usr/bin/env python
from neco.execution.attribute import Attribute
from neco.execution.ec import ExperimentController 
from neco.execution.resource import ResourceManager, ResourceState, clsinit

import time
import unittest

@clsinit
class MyResource(ResourceManager):
    _rtype = "MyResource"

    @classmethod
    def _register_attributes(cls):
        cool_attr = Attribute("my_attr", "is a really nice attribute!")
        cls._register_attribute(cool_attr)

    def __init__(self, ec, guid):
        super(MyResource, self).__init__(ec, guid)

@clsinit
class AnotherResource(ResourceManager):
    _rtype = "AnotherResource"

    def __init__(self, ec, guid):
        super(AnotherResource, self).__init__(ec, guid)
     
class ResourceFactoryTestCase(unittest.TestCase):
    def test_add_resource_factory(self):
        from neco.execution.resource import ResourceFactory

        ResourceFactory.register_type(MyResource)
        ResourceFactory.register_type(AnotherResource)

        self.assertEquals(MyResource.rtype(), "MyResource")
        self.assertEquals(len(MyResource._attributes), 1)

        self.assertEquals(ResourceManager.rtype(), "Resource")
        self.assertEquals(len(ResourceManager._attributes), 0)

        self.assertEquals(AnotherResource.rtype(), "AnotherResource")
        self.assertEquals(len(AnotherResource._attributes), 0)

        self.assertEquals(len(ResourceFactory.resource_types()), 2)

class Channel(ResourceManager):
    _rtype = "Channel"

    def __init__(self, ec, guid):
        super(Channel, self).__init__(ec, guid)

    def deploy(self):
        time.sleep(1)
        super(Channel, self).deploy()
        self.logger.debug(" -------- DEPLOYED ------- ")
       
class Interface(ResourceManager):
    _rtype = "Interface"

    def __init__(self, ec, guid):
        super(Interface, self).__init__(ec, guid)

    def deploy(self):
        node = self.get_connected(Node.rtype())[0]
        chan = self.get_connected(Channel.rtype())[0]

        if node.state < ResourceState.PROVISIONED:
            self.ec.schedule("0.5s", self.deploy)
        elif chan.state < ResourceState.READY:
            self.ec.schedule("0.5s", self.deploy)
        else:
            time.sleep(2)
            super(Interface, self).deploy()
            self.logger.debug(" -------- DEPLOYED ------- ")

class Node(ResourceManager):
    _rtype = "Node"

    def __init__(self, ec, guid):
        super(Node, self).__init__(ec, guid)

    def deploy(self):
        if self.state == ResourceState.NEW:
            self.discover()
            self.provision()
            self.logger.debug(" -------- PROVISIONED ------- ")
            self.ec.schedule("3s", self.deploy)
        elif self.state == ResourceState.PROVISIONED:
            ifaces = self.get_connected(Interface.rtype())
            for rm in ifaces:
                if rm.state < ResourceState.READY:
                    self.ec.schedule("0.5s", self.deploy)
                    return 

            super(Node, self).deploy()
            self.logger.debug(" -------- DEPLOYED ------- ")

class Application(ResourceManager):
    _rtype = "Application"

    def __init__(self, ec, guid):
        super(Application, self).__init__(ec, guid)

    def deploy(self):
        node = self.get_connected(Node.rtype())[0]
        if node.state < ResourceState.READY:
            self.ec.schedule("0.5s", self.deploy)
        else:
            super(Application, self).deploy()
            self.logger.debug(" -------- DEPLOYED ------- ")

class ResourceManagerTestCase(unittest.TestCase):
    def test_deploy_in_order(self):
        """
        Test scenario: 2 applications running one on 1 node each. 
        Nodes are connected to Interfaces which are connected
        through a channel between them.

         - Application needs to wait until Node is ready to be ready
         - Node needs to wait until Interface is ready to be ready
         - Interface needs to wait until Node is provisioned to be ready
         - Interface needs to wait until Channel is ready to be ready
         - The channel doesn't wait for any other resource to be ready

        """
        from neco.execution.resource import ResourceFactory
        
        ResourceFactory.register_type(Application)
        ResourceFactory.register_type(Node)
        ResourceFactory.register_type(Interface)
        ResourceFactory.register_type(Channel)

        ec = ExperimentController()

        app1 = ec.register_resource("Application")
        app2 = ec.register_resource("Application")
        node1 = ec.register_resource("Node")
        node2 = ec.register_resource("Node")
        iface1 = ec.register_resource("Interface")
        iface2 = ec.register_resource("Interface")
        chan = ec.register_resource("Channel")

        ec.register_connection(app1, node1)
        ec.register_connection(app2, node2)
        ec.register_connection(iface1, node1)
        ec.register_connection(iface2, node2)
        ec.register_connection(iface1, chan)
        ec.register_connection(iface2, chan)

        ec.deploy()

        while not all([ ec.state(guid) == ResourceState.STARTED \
                for guid in [app1, app2, node1, node2, iface1, iface2, chan]]) \
                and not ec.finished:
            time.sleep(0.5)

        ec.shutdown()

        rmapp1 = ec.get_resource(app1)
        rmapp2 = ec.get_resource(app2)
        rmnode1 = ec.get_resource(node1)
        rmnode2 = ec.get_resource(node2)
        rmiface1 = ec.get_resource(iface1)
        rmiface2 = ec.get_resource(iface2)
        rmchan = ec.get_resource(chan)

        ## Validate deploy order
        # - Application needs to wait until Node is ready to be ready
        self.assertTrue(rmnode1.ready_time < rmapp1.ready_time)
        self.assertTrue(rmnode2.ready_time < rmapp2.ready_time)

         # - Node needs to wait until Interface is ready to be ready
        self.assertTrue(rmnode1.ready_time > rmiface1.ready_time)
        self.assertTrue(rmnode2.ready_time > rmiface2.ready_time)

         # - Interface needs to wait until Node is provisioned to be ready
        self.assertTrue(rmnode1.provision_time < rmiface1.ready_time)
        self.assertTrue(rmnode2.provision_time < rmiface2.ready_time)

         # - Interface needs to wait until Channel is ready to be ready
        self.assertTrue(rmchan.ready_time < rmiface1.ready_time)
        self.assertTrue(rmchan.ready_time < rmiface2.ready_time)

    def test_start_with_condition(self):
        # TODO!!!
        pass
    
    def test_stop_with_condition(self):
        # TODO!!!
        pass

    def test_set_with_condition(self):
        # TODO!!!
        pass


if __name__ == '__main__':
    unittest.main()