# Copyright 2024 Max Planck Institute for Software Systems, and
# National University of Singapore
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from simbricks.orchestration import system
from simbricks.orchestration import simulation as sim
from simbricks.orchestration import instantiation as inst
from simbricks.utils import base as utils_base

"""
Simple Netperf Example:
One Client: Host_0, One Server: Host1 connected through a switch
HOST0 -- NIC0 ------ SWITCH ------ NIC1 -- HOST1
client                                     server
"""


"""
PARAMETERS TO ADJUST:
nic_sys: The specification of the NIC that shall be simulated. Possible values are 
         e.g. 'CorundumNIC' or 'IntelI40eNIC'.
host_sys: The hosts system confiugration. This choice may also depend on the NIC 
          that is specified for usage to ensure the required drivers are available.
          Possible values are e.g. 'CorundumLinuxHost' or 'I40ELinuxHost'.
nic_sim: The simulator choice for the nic that is specified by the system. Can 
         be e.g. 'CorundumBMNICSim' or 'CorundumVerilatorNICSim'
host_sim: The simulator choice for the hosts. Can be e.g. 'sim.QemuSim' or 'sim.Gem5Sim'.
pci_latency: The pci latency between the hosts and the nics 
run_synchronized: Bool flag to enable or disable synchronization for the actual 
                  simulation of the virtual prototype. 
"""
nic_sys = system.CorundumNIC
host_sys = system.CorundumLinuxHost
nic_sim = sim.CorundumBMNICSim
host_sim = sim.Gem5Sim
pci_latency = 1000  # nanoseconds
run_synchronized = False


"""
The instantiations list that is used by the SimBricks runtime to create a simulation run of you virtual prototype. 
"""
instantiations: list[inst.Instantiation] = []


"""
Specify the system you want to simulate
"""
sys = system.System()


"""
Create HOST0, the client host in our topology
"""
host0 = host_sys(sys)
host0.add_disk(system.DistroDiskImage(h=host0, name="base"))
host0.add_disk(system.LinuxConfigDiskImage(h=host0))
"""
Create NIC0, and connect it to HOST0
"""
nic0 = nic_sys(sys)
nic0.add_ipv4("10.0.0.1")
host0.connect_pcie_dev(nic0)


"""
Create HOST1, the server host in our topology
"""
host1 = host_sys(sys)
host1.add_disk(system.DistroDiskImage(h=host1, name="base"))
host1.add_disk(system.LinuxConfigDiskImage(h=host1))
"""
Create NIC1, and connect it to HOST1
"""
nic1 = nic_sys(sys)
nic1.add_ipv4("10.0.0.2")
host1.connect_pcie_dev(nic1)


"""
Create an ethernet switch and connect the NICs from client and server to the switch
"""
switch = system.EthSwitch(sys)
switch.connect_eth_peer_if(nic0._eth_if)
switch.connect_eth_peer_if(nic1._eth_if)


"""
Specify the software i.e. applciations to run on the hosts, in this case netperf
"""
client_app = system.NetperfClient(h=host0, server_ip=nic1._ip)
client_app.wait = True
client_app.duration_tp = 1
client_app.duration_lat = 1
host0.add_app(client_app)

server_app = system.NetperfServer(h=host1)
host1.add_app(server_app)


"""
Adjust pci latencies of channels connecting hosts and nics
"""
sys.latencies(
    amount=pci_latency,
    ratio=utils_base.Time.Nanoseconds,
    channel_type=system.PCIeChannel,
)


"""
Specify the simulators to use for your system
"""
simulation = sim.Simulation(name="My-very-first-test-simulation", system=sys)

host_inst0 = host_sim(simulation)
host_inst0.add(host0)

host_inst1 = host_sim(simulation)
host_inst1.add(host1)

nic_inst0 = nic_sim(simulation=simulation)
nic_inst0.add(nic0)

nic_inst1 = nic_sim(simulation=simulation)
nic_inst1.add(nic1)

net_inst = sim.SwitchNet(simulation)
net_inst.add(switch)


"""
Enable that the experiment shall be run synchronized, i.e. with accurate timing
"""
if run_synchronized:
    simulation.enable_synchronization(amount=500, ratio=utils_base.Time.Nanoseconds)


"""
Create an instatiation of your virtual prototype
"""
instance = inst.Instantiation(sim=simulation)
instance.create_checkpoint = True
instantiations.append(instance)