"""
Flow Test
Test each flow table can set entry, and packet rx correctly.
1) L3UcastRoute
2) QinQ
"""

import logging

from oftest import config
import oftest.base_tests as base_tests
import ofp
from oftest.testutils import *
from accton_util import *

class PacketInSrcMacMiss(base_tests.SimpleDataPlane):
    """
    Test packet in function on a src-mac miss
    Send a packet to each dataplane port and verify that a packet
    in message is received from the controller for each
    #todo verify you stop receiving after adding rule
    """

    def runTest(self):
        delete_all_flows(self.controller)
        delete_all_groups(self.controller)

        parsed_vlan_pkt = simple_tcp_packet(pktlen=104,
                      vlan_vid=0x1001, dl_vlan_enable=True)
        vlan_pkt = str(parsed_vlan_pkt)

        add_vlan_table_flow(self.controller, config["port_map"].keys(), 1)

        # group table
        # set up untag groups for each port
        add_l2_interface_grouop(self.controller, config["port_map"].keys(), 1,  True, 1)

        for of_port in config["port_map"].keys():
            logging.info("PacketInMiss test, port %d", of_port)
            self.dataplane.send(of_port, vlan_pkt)

            verify_packet_in(self, vlan_pkt, of_port, ofp.OFPR_NO_MATCH)

            verify_no_other_packets(self)

class L2FloodTaggedUnknownSrc(base_tests.SimpleDataPlane):
    """
    Test L2 flood to a vlan
    Send a packet with unknown dst_mac and check if the packet is flooded to all ports except inport
    #todo take in account unknown src 
    """
    def runTest(self):
        ports = sorted(config["port_map"].keys())
        delete_all_flows(self.controller)
        delete_all_groups(self.controller)

        add_vlan_table_flow(self.controller, ports, 1)

        # set up tagged groups for each port
        add_l2_interface_grouop(self.controller, ports, 1,  True, 1)

        msg=add_l2_flood_group(self.controller, ports, 1, 1)
        add_bridge_flow(self.controller, None, 1, msg.group_id, True)

        parsed_pkt = simple_tcp_packet(dl_vlan_enable=True, vlan_vid=1, eth_dst='00:12:34:56:78:9a')
        pkt = str(parsed_pkt)
        #verify flood
        for ofport in ports:
            self.dataplane.send(ofport, pkt)
            #self won't rx packet
            verify_no_packet(self, pkt, ofport)
            #others will rx packet
            tmp_ports=list(ports)
            tmp_ports.remove(ofport)
            verify_packets(self, pkt, tmp_ports)

        verify_no_other_packets(self)


class L2UnicastTagged(base_tests.SimpleDataPlane):
    """
    Test output function for an exact-match flow

    For each port A, adds a flow directing matching packets to that port.
    Then, for all other ports B != A, verifies that sending a matching packet
    to B results in an output to A.
    """
    def runTest(self):
        ports = sorted(config["port_map"].keys())

        delete_all_flows(self.controller)
        delete_all_groups(self.controller)

        add_vlan_table_flow(self.controller, config["port_map"].keys())

        # set up tag groups for each port
        add_l2_interface_grouop(self.controller, config["port_map"].keys(), 1, True, 1)

        for port in ports:
            group_id = encode_l2_interface_group_id(1, port)
            add_bridge_flow(self.controller, [0x00, 0x12, 0x34, 0x56, 0x78, port], 1, group_id, True)
        do_barrier(self.controller)

        for out_port in ports:
            # change dest based on port number
            mac_dst= '00:12:34:56:78:%02X' % out_port
            for in_port in ports:
                if in_port == out_port:
                    continue
                # change source based on port number to avoid packet-ins from learning
                mac_src= '00:12:34:56:78:%02X' % in_port
                parsed_pkt = simple_tcp_packet(dl_vlan_enable=True, vlan_vid=1, eth_dst=mac_dst, eth_src=mac_src)
                pkt = str(parsed_pkt)
                self.dataplane.send(in_port, pkt)

                for ofport in ports:
                    if ofport in [out_port]:
                        verify_packet(self, pkt, ofport)
                    else:
                        verify_no_packet(self, pkt, ofport)

                verify_no_other_packets(self)


class L3UcastTagged(base_tests.SimpleDataPlane):
    """
    Port1(vlan1, 0x00, 0x00, 0x00, 0x22, 0x22, 0x01, 192.168.1.1) , 
    Port2(vlan2, 0x00, 0x00, 0x00, 0x22, 0x22, 0x02, 19.168.2.1)
    """
    def runTest(self):          
        delete_all_flows(self.controller)
        delete_all_groups(self.controller)

        if len(config["port_map"]) <2:
            logging.info("Port count less than 2, can't run this case")
            return
        
        vlan_id=1
        intf_src_mac=[0x00, 0x00, 0x00, 0xcc, 0xcc, 0xcc]
        dst_mac=[0x00, 0x00, 0x00, 0x22, 0x22, 0x00]
        dip=0xc0a80001
        for port in config["port_map"].keys():
            #add l2 interface group
            add_one_l2_interface_grouop(self.controller, port, vlan_id=vlan_id, is_tagged=True, send_barrier=False)
            dst_mac[5]=vlan_id
            l3_msg=add_l3_unicast_group(self.controller, port, vlanid=vlan_id, id=vlan_id, src_mac=intf_src_mac, dst_mac=dst_mac)
            #add vlan flow table
            add_one_vlan_table_flow(self.controller, port, vlan_id, flag=VLAN_TABLE_FLAG_ONLY_BOTH)
            #add termination flow
            add_termination_flow(self.controller, port, 0x0800, intf_src_mac, vlan_id)           
            #add unicast routing flow
            dst_ip = dip + (vlan_id<<8)           
            add_unicast_routing_flow(self.controller, 0x0800, dst_ip, 0, l3_msg.group_id)

            #add entries in the Bridging table to avoid packet-in from mac learning
            group_id = encode_l2_interface_group_id(vlan_id, port)
            add_bridge_flow(self.controller, dst_mac, vlan_id, group_id, True)
            
            vlan_id += 1
        
        do_barrier(self.controller)  
        
        port1=config["port_map"].keys()[0]
        port2=config["port_map"].keys()[1]
        #port 1 to port 2        
        switch_mac = ':'.join(['%02X' % x for x in intf_src_mac])
        dst_mac[5]=1
        port1_mac=':'.join(['%02X' % x for x in dst_mac])

        parsed_pkt = simple_tcp_packet(pktlen=100, dl_vlan_enable=True,
                                       vlan_vid=1,
                                       eth_dst=switch_mac,
                                       eth_src=port1_mac,
                                       ip_ttl=64,
                                       ip_src="192.168.1.1",
                                       ip_dst='192.168.2.1')
        pkt=str(parsed_pkt)
        self.dataplane.send(port1, pkt)
        #build expect packet
        dst_mac[5]=2
        port2_mac=':'.join(['%02X' % x for x in dst_mac])  
        exp_pkt = simple_tcp_packet(pktlen=100,
                                       dl_vlan_enable=True,
                                       vlan_vid=2, 
                                       eth_dst=port2_mac,
                                       eth_src=switch_mac,
                                       ip_ttl=63,
                                       ip_src="192.168.1.1",
                                       ip_dst='192.168.2.1')        
        pkt=str(exp_pkt)
        verify_packet(self, pkt, port2)
        verify_no_other_packets(self)

        #port 2 to port 1
        switch_mac = ':'.join(['%02X' % x for x in intf_src_mac])
        dst_mac[5]=2
        port2_mac=':'.join(['%02X' % x for x in dst_mac])  

        parsed_pkt = simple_tcp_packet(pktlen=100,
                                       dl_vlan_enable=True,
                                       vlan_vid=2, 
                                       eth_dst=switch_mac,
                                       eth_src=port2_mac,
                                       ip_ttl=64,
                                       ip_src="192.168.2.1",
                                       ip_dst='192.168.1.1')
        pkt=str(parsed_pkt)                                       
        self.dataplane.send(port2, pkt)
        #build expect packet
        dst_mac[5]=1
        port1_mac=':'.join(['%02X' % x for x in dst_mac])  
        exp_pkt = simple_tcp_packet(pktlen=100,
                                       dl_vlan_enable=True,
                                       vlan_vid=1,
                                       eth_dst=port1_mac,
                                       eth_src=switch_mac,
                                       ip_ttl=63,
                                       ip_src="192.168.2.1",
                                       ip_dst='192.168.1.1')        
        pkt=str(exp_pkt) 
        verify_packet(self, pkt, port1)
        verify_no_other_packets(self)