# Copyright (c) 2011 Advanced Micro Devices, Inc.
#               2011 Massachusetts Institute of Technology
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from m5.params import *
from m5.objects import *

from topologies.BaseTopology import SimpleTopology


class Pt2Pt(SimpleTopology):
    description = "Pt2Pt"

    def __init__(self, controllers):
        self.nodes = controllers

    def makeTopology(self, options, network, IntLink, ExtLink, Router):
        nodes = self.nodes

        # default values for link latency and router latency.
        # Can be over-ridden on a per link/router basis
        link_latency = options.link_latency  # used by simple and garnet
        router_latency = options.router_latency  # only used by garnet

        # Create an individual router for each controller,
        # and connect all to all.
        # Since this is a high-radix router, router_latency should
        # accordingly be set to a higher value than the default
        # (which is 1 for mesh routers)
        routers = [
            Router(router_id=i, latency=router_latency)
            for i in range(len(nodes))
        ]
        network.routers = routers

        ext_links = [
            ExtLink(
                link_id=i,
                ext_node=n,
                int_node=routers[i],
                latency=link_latency,
            )
            for (i, n) in enumerate(nodes)
        ]
        network.ext_links = ext_links

        link_count = len(nodes)
        int_links = []
        for i in range(len(nodes)):
            for j in range(len(nodes)):
                if i != j:
                    link_count += 1
                    int_links.append(
                        IntLink(
                            link_id=link_count,
                            src_node=routers[i],
                            dst_node=routers[j],
                            latency=link_latency,
                        )
                    )

        network.int_links = int_links