#!/usr/bin/env python3
import sys
from argparse import (
    ArgumentDefaultsHelpFormatter,
    ArgumentParser,
    ArgumentTypeError,
    Namespace,
    _SubParsersAction,
)
from typing import Tuple

import netaddr
from google.protobuf.json_format import MessageToJson

from core.api.grpc.client import CoreGrpcClient
from core.api.grpc.core_pb2 import (
    Geo,
    Interface,
    LinkOptions,
    Node,
    NodeType,
    Position,
    SessionState,
)

NODE_TYPES = [k for k, v in NodeType.Enum.items() if v != NodeType.PEER_TO_PEER]


def mac_type(value: str) -> str:
    if not netaddr.valid_mac(value):
        raise ArgumentTypeError("invalid mac address")
    return value


def ip4_type(value: str) -> str:
    if not netaddr.valid_ipv4(value):
        raise ArgumentTypeError("invalid ip4 address")
    return value


def ip6_type(value: str) -> str:
    if not netaddr.valid_ipv6(value):
        raise ArgumentTypeError("invalid ip6 address")
    return value


def position_type(value: str) -> Tuple[float, float]:
    error = "invalid position, must be in the format: float,float"
    try:
        values = [float(x) for x in value.split(",")]
    except ValueError:
        raise ArgumentTypeError(error)
    if len(values) != 2:
        raise ArgumentTypeError(error)
    x, y = values
    return x, y


def geo_type(value: str) -> Tuple[float, float, float]:
    error = "invalid geo, must be in the format: float,float,float"
    try:
        values = [float(x) for x in value.split(",")]
    except ValueError:
        raise ArgumentTypeError(error)
    if len(values) != 3:
        raise ArgumentTypeError(error)
    lon, lat, alt = values
    return lon, lat, alt


def get_current_session() -> int:
    core = CoreGrpcClient()
    with core.context_connect():
        response = core.get_sessions()
    if not response.sessions:
        print("no current session to interact with")
        sys.exit(1)
    return response.sessions[0].id


def print_interface_header() -> None:
    print("ID  | MAC Address       | IP4 Address        | IP6 Address")


def print_interface(iface: Interface) -> None:
    iface_ip4 = f"{iface.ip4}/{iface.ip4_mask}" if iface.ip4 else None
    iface_ip6 = f"{iface.ip6}/{iface.ip6_mask}" if iface.ip6 else None
    print(f"{iface.id:<3} | {iface.mac:<11} | {iface_ip4:<18} | {iface_ip6}")


def query_sessions(args: Namespace) -> None:
    core = CoreGrpcClient()
    with core.context_connect():
        response = core.get_sessions()
        if args.json:
            json = MessageToJson(response, preserving_proto_field_name=True)
            print(json)
        else:
            print("Session ID | Session State | Nodes")
            for s in response.sessions:
                state = SessionState.Enum.Name(s.state)
                print(f"{s.id:<10} | {state:<13} | {s.nodes}")


def query_session(args: Namespace) -> None:
    core = CoreGrpcClient()
    with core.context_connect():
        response = core.get_session(args.id)
        if args.json:
            json = MessageToJson(response, preserving_proto_field_name=True)
            print(json)
        else:
            print("Nodes")
            print("Node ID | Node Name | Node Type")
            names = {}
            for node in response.session.nodes:
                names[node.id] = node.name
                node_type = NodeType.Enum.Name(node.type)
                print(f"{node.id:<7} | {node.name:<9} | {node_type}")

            print("\nLinks")
            for link in response.session.links:
                n1 = names[link.node1_id]
                n2 = names[link.node2_id]
                print(f"Node   | ", end="")
                print_interface_header()
                if link.HasField("iface1"):
                    print(f"{n1:<6} | ", end="")
                    print_interface(link.iface1)
                if link.HasField("iface2"):
                    print(f"{n2:<6} | ", end="")
                    print_interface(link.iface2)
                print()


def query_node(args: Namespace) -> None:
    core = CoreGrpcClient()
    with core.context_connect():
        response = core.get_node(args.id, args.node)
        if args.json:
            json = MessageToJson(response, preserving_proto_field_name=True)
            print(json)
        else:
            node = response.node
            node_type = NodeType.Enum.Name(node.type)
            print("ID   | Name    | Type")
            print(f"{node.id:<4} | {node.name:<7} | {node_type}")
            print("Interfaces")
            print_interface_header()
            for iface in response.ifaces:
                print_interface(iface)


def add_node(args: Namespace) -> None:
    session_id = get_current_session()
    node_type = NodeType.Enum.Value(args.type)
    pos = None
    if args.pos:
        x, y = args.pos
        pos = Position(x=x, y=y)
    geo = None
    if args.geo:
        lon, lat, alt = args.geo
        geo = Geo(lon=lon, lat=lat, alt=alt)
    core = CoreGrpcClient()
    with core.context_connect():
        node = Node(
            id=args.id,
            name=args.name,
            type=node_type,
            model=args.model,
            emane=args.emane,
            icon=args.icon,
            image=args.image,
            position=pos,
            geo=geo,
        )
        response = core.add_node(session_id, node)
        if args.json:
            json = MessageToJson(response, preserving_proto_field_name=True)
            print(json)
        else:
            print(f"created node: {response.node_id}")


def edit_node(args: Namespace) -> None:
    session_id = get_current_session()
    pos = None
    if args.pos:
        x, y = args.pos
        pos = Position(x=x, y=y)
    geo = None
    if args.geo:
        lon, lat, alt = args.geo
        geo = Geo(lon=lon, lat=lat, alt=alt)
    core = CoreGrpcClient()
    with core.context_connect():
        response = core.edit_node(session_id, args.id, pos, args.icon, geo=geo)
        if args.json:
            json = MessageToJson(response, preserving_proto_field_name=True)
            print(json)
        else:
            print(f"edit node: {response.result}")


def delete_node(args: Namespace) -> None:
    session_id = get_current_session()
    core = CoreGrpcClient()
    with core.context_connect():
        response = core.delete_node(session_id, args.id)
        if args.json:
            json = MessageToJson(response, preserving_proto_field_name=True)
            print(json)
        else:
            print(f"deleted node: {response.result}")


def add_link(args: Namespace) -> None:
    session_id = get_current_session()
    iface1 = None
    if args.iface1_id is not None:
        iface1 = Interface(
            id=args.iface1_id,
            mac=args.iface1_mac,
            ip4=args.iface1_ip4,
            ip4_mask=args.iface1_ip4_mask,
            ip6=args.iface1_ip4,
            ip6_mask=args.iface1_ip6_mask,
        )
    iface2 = None
    if args.iface2_id is not None:
        iface2 = Interface(
            id=args.iface2_id,
            mac=args.iface2_mac,
            ip4=args.iface2_ip4,
            ip4_mask=args.iface2_ip4_mask,
            ip6=args.iface2_ip4,
            ip6_mask=args.iface2_ip6_mask,
        )
    options = LinkOptions(
        bandwidth=args.bandwidth,
        loss=args.loss,
        jitter=args.jitter,
        delay=args.delay,
        dup=args.dup,
        unidirectional=args.uni,
    )
    core = CoreGrpcClient()
    with core.context_connect():
        response = core.add_link(session_id, args.node1, args.node2, iface1, iface2, options)
        if args.json:
            json = MessageToJson(response, preserving_proto_field_name=True)
            print(json)
        else:
            print(f"edit link: {response.result}")


def edit_link(args: Namespace) -> None:
    session_id = get_current_session()
    options = LinkOptions(
        bandwidth=args.bandwidth,
        loss=args.loss,
        jitter=args.jitter,
        delay=args.delay,
        dup=args.dup,
        unidirectional=args.uni,
    )
    core = CoreGrpcClient()
    with core.context_connect():
        response = core.edit_link(
            session_id, args.node1, args.node2, options, args.iface1, args.iface2
        )
        if args.json:
            json = MessageToJson(response, preserving_proto_field_name=True)
            print(json)
        else:
            print(f"edit link: {response.result}")


def delete_link(args: Namespace) -> None:
    session_id = get_current_session()
    core = CoreGrpcClient()
    with core.context_connect():
        response = core.delete_link(session_id, args.node1, args.node2, args.iface1, args.iface2)
        if args.json:
            json = MessageToJson(response, preserving_proto_field_name=True)
            print(json)
        else:
            print(f"delete link: {response.result}")


def setup_node_parser(parent: _SubParsersAction) -> None:
    parser = parent.add_parser("node", help="node interactions")
    parser.add_argument("--session", type=int, help="session to interact with")
    subparsers = parser.add_subparsers(help="node commands")
    subparsers.required = True
    subparsers.dest = "command"

    add_parser = subparsers.add_parser("add", help="add a node")
    add_parser.formatter_class = ArgumentDefaultsHelpFormatter
    add_parser.add_argument("--id", type=int, help="id to use, optional")
    add_parser.add_argument("--name", help="name to use, optional")
    add_parser.add_argument(
        "--type", choices=NODE_TYPES, default="DEFAULT", help="type of node"
    )
    add_parser.add_argument("--model", help="used to determine services, optional")
    group = add_parser.add_mutually_exclusive_group(required=True)
    group.add_argument("--pos", type=position_type, help="x,y position")
    group.add_argument("--geo", type=geo_type, help="lon,lat,alt position")
    add_parser.add_argument("--icon", help="icon to use, optional")
    add_parser.add_argument("--image", help="container image, optional")
    add_parser.add_argument(
        "--emane", help="emane model, only required for emane nodes"
    )
    add_parser.set_defaults(func=add_node)

    edit_parser = subparsers.add_parser("edit", help="edit a node")
    edit_parser.formatter_class = ArgumentDefaultsHelpFormatter
    edit_parser.add_argument("--id", type=int, help="id to use, optional")
    group = edit_parser.add_mutually_exclusive_group(required=True)
    group.add_argument("--pos", type=position_type, help="x,y position")
    group.add_argument("--geo", type=geo_type, help="lon,lat,alt position")
    edit_parser.add_argument("--icon", help="icon to use, optional")
    edit_parser.set_defaults(func=edit_node)

    delete_parser = subparsers.add_parser("delete", help="delete a node")
    delete_parser.formatter_class = ArgumentDefaultsHelpFormatter
    delete_parser.add_argument(
        "--id", type=int, help="node id to delete", required=True
    )
    delete_parser.set_defaults(func=delete_node)


def setup_link_parser(parent: _SubParsersAction) -> None:
    parser = parent.add_parser("link", help="link interactions")
    parser.add_argument("--session", type=int, help="session to interact with")
    subparsers = parser.add_subparsers(help="link commands")
    subparsers.required = True
    subparsers.dest = "command"

    add_parser = subparsers.add_parser("add", help="add a node")
    add_parser.formatter_class = ArgumentDefaultsHelpFormatter
    add_parser.add_argument(
        "--node1", type=int, help="node1 id for link", required=True
    )
    add_parser.add_argument(
        "--node2", type=int, help="node1 id for link", required=True
    )
    add_parser.add_argument("--iface1-id", type=int, help="node1 interface id for link")
    add_parser.add_argument("--iface1-mac", type=mac_type, help="node1 interface mac")
    add_parser.add_argument("--iface1-ip4", type=ip4_type, help="node1 interface ip4")
    add_parser.add_argument(
        "--iface1-ip4-mask", type=int, help="node1 interface ip4 mask"
    )
    add_parser.add_argument("--iface1-ip6", type=ip6_type, help="node1 interface ip6")
    add_parser.add_argument(
        "--iface1-ip6-mask", type=int, help="node1 interface ip6 mask"
    )
    add_parser.add_argument("--iface2-id", type=int, help="node1 interface id for link")
    add_parser.add_argument("--iface2-mac", type=mac_type, help="node1 interface mac")
    add_parser.add_argument("--iface2-ip4", type=ip4_type, help="node1 interface ip4")
    add_parser.add_argument(
        "--iface2-ip4-mask", type=int, help="node1 interface ip4 mask"
    )
    add_parser.add_argument("--iface2-ip6", type=ip6_type, help="node1 interface ip6")
    add_parser.add_argument(
        "--iface2-ip6-mask", type=int, help="node1 interface ip6 mask"
    )
    add_parser.add_argument("--bandwidth", type=int, help="bandwidth (bps) for link")
    add_parser.add_argument("--loss", type=float, help="loss (%) for link")
    add_parser.add_argument("--jitter", type=int, help="jitter (us) for link")
    add_parser.add_argument("--delay", type=int, help="delay (us) for link")
    add_parser.add_argument("--dup", type=int, help="duplicate (%) for link")
    add_parser.add_argument(
        "--uni", action="store_true", help="is link unidirectional?"
    )
    add_parser.set_defaults(func=add_link)

    edit_parser = subparsers.add_parser("edit", help="edit a link")
    edit_parser.formatter_class = ArgumentDefaultsHelpFormatter
    edit_parser.add_argument(
        "--node1", type=int, help="node1 id for link", required=True
    )
    edit_parser.add_argument(
        "--node2", type=int, help="node1 id for link", required=True
    )
    edit_parser.add_argument("--iface1", type=int, help="node1 interface id for link")
    edit_parser.add_argument("--iface2", type=int, help="node2 interface id for link")
    edit_parser.add_argument("--bandwidth", type=int, help="bandwidth (bps) for link")
    edit_parser.add_argument("--loss", type=float, help="loss (%) for link")
    edit_parser.add_argument("--jitter", type=int, help="jitter (us) for link")
    edit_parser.add_argument("--delay", type=int, help="delay (us) for link")
    edit_parser.add_argument("--dup", type=int, help="duplicate (%) for link")
    edit_parser.add_argument(
        "--uni", action="store_true", help="is link unidirectional?"
    )
    edit_parser.set_defaults(func=edit_link)

    delete_parser = subparsers.add_parser("delete", help="delete a link")
    delete_parser.formatter_class = ArgumentDefaultsHelpFormatter
    delete_parser.add_argument(
        "--node1", type=int, help="node1 id for link", required=True
    )
    delete_parser.add_argument(
        "--node2", type=int, help="node1 id for link", required=True
    )
    delete_parser.add_argument("--iface1", type=int, help="node1 interface id for link")
    delete_parser.add_argument("--iface2", type=int, help="node2 interface id for link")
    delete_parser.set_defaults(func=delete_link)


def setup_query_parser(parent: _SubParsersAction) -> None:
    parser = parent.add_parser("query", help="query interactions")
    subparsers = parser.add_subparsers(help="query commands")
    subparsers.required = True
    subparsers.dest = "command"

    sessions_parser = subparsers.add_parser("sessions", help="query current sessions")
    sessions_parser.set_defaults(func=query_sessions)

    session_parser = subparsers.add_parser("session", help="query session")
    session_parser.add_argument("--id", type=int, help="session to query", required=True)
    session_parser.set_defaults(func=query_session)

    node_parser = subparsers.add_parser("node", help="query node")
    node_parser.add_argument("--id", type=int, help="session to query", required=True)
    node_parser.add_argument("--node", type=int, help="node to query", required=True)
    node_parser.set_defaults(func=query_node)


def main() -> None:
    parser = ArgumentParser(formatter_class=ArgumentDefaultsHelpFormatter)
    parser.add_argument(
        "-j", "--json", action="store_true", help="print responses to terminal as json"
    )
    subparsers = parser.add_subparsers(help="supported commands")
    subparsers.required = True
    subparsers.dest = "command"
    setup_node_parser(subparsers)
    setup_link_parser(subparsers)
    setup_query_parser(subparsers)
    args = parser.parse_args()
    args.func(args)


if __name__ == "__main__":
    main()