"""A creation workflow that deploys a new IP trunk service."""

import json
from ipaddress import IPv4Address, IPv4Network, IPv6Address, IPv6Network
from typing import Annotated
from uuid import uuid4

from annotated_types import Len
from orchestrator.forms import FormPage
from orchestrator.forms.validators import Choice, Label
from orchestrator.targets import Target
from orchestrator.types import FormGenerator, State, SubscriptionLifecycle, UUIDstr
from orchestrator.utils.errors import ProcessFailureError
from orchestrator.utils.json import json_dumps
from orchestrator.workflow import StepList, begin, conditional, done, step, step_group, workflow
from orchestrator.workflows.steps import resync, set_status, store_process_subscription
from orchestrator.workflows.utils import wrap_create_initial_input_form
from ping3 import ping
from pydantic import AfterValidator, ConfigDict, field_validator
from pydantic_forms.validators import ReadOnlyField, validate_unique_list
from pynetbox.models.dcim import Interfaces

from gso.products.product_blocks.iptrunk import (
    IptrunkInterfaceBlockInactive,
    IptrunkSideBlockInactive,
    IptrunkType,
    PhysicalPortCapacity,
)
from gso.products.product_types.iptrunk import Iptrunk, IptrunkInactive, IptrunkProvisioning
from gso.products.product_types.router import Router
from gso.services import infoblox, subscriptions
from gso.services.lso_client import execute_playbook, lso_interaction
from gso.services.netbox_client import NetboxClient
from gso.services.partners import get_partner_by_name
from gso.services.sharepoint import SharePointClient
from gso.services.subscriptions import get_non_terminated_iptrunk_subscriptions
from gso.settings import load_oss_params
from gso.utils.helpers import (
    LAGMember,
    available_interfaces_choices,
    available_lags_choices,
    calculate_recommended_minimum_links,
    get_router_vendor,
    validate_interface_name_list,
    validate_iptrunk_unique_interface,
    validate_router_in_netbox,
)
from gso.utils.shared_enums import Vendor
from gso.utils.types import TTNumber
from gso.utils.workflow_steps import prompt_sharepoint_checklist_url


def initial_input_form_generator(product_name: str) -> FormGenerator:
    """Gather input from the user in three steps. General information, and information on both sides of the trunk."""
    routers = {}
    for router in subscriptions.get_active_router_subscriptions(
        includes=["subscription_id", "description"]
    ) + subscriptions.get_provisioning_router_subscriptions(includes=["subscription_id", "description"]):
        #  Add both provisioning and active routers, since trunks are required for promoting a router to active.
        routers[str(router["subscription_id"])] = router["description"]

    class CreateIptrunkForm(FormPage):
        model_config = ConfigDict(title=product_name)

        tt_number: TTNumber
        partner: ReadOnlyField("GEANT", default_type=str)  # type: ignore[valid-type]
        geant_s_sid: str | None = None
        iptrunk_description: str | None = None
        iptrunk_type: IptrunkType
        iptrunk_speed: PhysicalPortCapacity
        iptrunk_number_of_members: int

    initial_user_input = yield CreateIptrunkForm
    recommended_minimum_links = calculate_recommended_minimum_links(
        initial_user_input.iptrunk_number_of_members, initial_user_input.iptrunk_speed
    )

    class VerifyMinimumLinksForm(FormPage):
        info_label: Label = f"This is the calculated minimum-links for this LAG: {recommended_minimum_links}"
        iptrunk_minimum_links: int = recommended_minimum_links
        info_label2: Label = "Please confirm or modify."

    verify_minimum_links = yield VerifyMinimumLinksForm
    router_enum_a = Choice("Select a router", zip(routers.keys(), routers.items(), strict=True))  # type: ignore[arg-type]

    class SelectRouterSideA(FormPage):
        model_config = ConfigDict(title="Select a router for side A of the trunk.")

        side_a_node_id: router_enum_a  # type: ignore[valid-type]

        @field_validator("side_a_node_id")
        def validate_device_exists_in_netbox(cls, side_a_node_id: UUIDstr) -> str | None:
            return validate_router_in_netbox(side_a_node_id)

    user_input_router_side_a = yield SelectRouterSideA
    router_a = user_input_router_side_a.side_a_node_id.name
    router_a_fqdn = Router.from_subscription(router_a).router.router_fqdn

    juniper_ae_members = Annotated[
        list[LAGMember],
        AfterValidator(validate_unique_list),
        Len(
            min_length=initial_user_input.iptrunk_number_of_members,
            max_length=initial_user_input.iptrunk_number_of_members,
        ),
    ]

    if get_router_vendor(router_a) == Vendor.NOKIA:

        class NokiaLAGMemberA(LAGMember):
            interface_name: available_interfaces_choices(  # type: ignore[valid-type]
                router_a,
                initial_user_input.iptrunk_speed,
            )

        ae_members_side_a_type = Annotated[
            list[NokiaLAGMemberA],
            AfterValidator(validate_unique_list),
            Len(
                min_length=initial_user_input.iptrunk_number_of_members,
                max_length=initial_user_input.iptrunk_number_of_members,
            ),
        ]
    else:
        ae_members_side_a_type = juniper_ae_members  # type: ignore[assignment, misc]

    class CreateIptrunkSideAForm(FormPage):
        model_config = ConfigDict(title=f"Provide subscription details for side A of the trunk.({router_a_fqdn})")

        side_a_ae_iface: available_lags_choices(router_a) or str  # type: ignore[valid-type]
        side_a_ae_geant_a_sid: str | None
        side_a_ae_members: ae_members_side_a_type

        @field_validator("side_a_ae_members")
        def validate_side_a_ae_members(cls, side_a_ae_members: list[LAGMember]) -> list[LAGMember]:
            validate_iptrunk_unique_interface(side_a_ae_members)
            vendor = get_router_vendor(router_a)
            validate_interface_name_list(side_a_ae_members, vendor)
            return side_a_ae_members

    user_input_side_a = yield CreateIptrunkSideAForm
    # Remove the selected router for side A, to prevent any loops
    routers.pop(str(router_a))
    router_enum_b = Choice("Select a router", zip(routers.keys(), routers.items(), strict=True))  # type: ignore[arg-type]

    class SelectRouterSideB(FormPage):
        model_config = ConfigDict(title="Select a router for side B of the trunk.")

        side_b_node_id: router_enum_b  # type: ignore[valid-type]

        @field_validator("side_b_node_id")
        def validate_device_exists_in_netbox(cls, side_b_node_id: UUIDstr) -> str | None:
            return validate_router_in_netbox(side_b_node_id)

    user_input_router_side_b = yield SelectRouterSideB
    router_b = user_input_router_side_b.side_b_node_id.name
    router_b_fqdn = Router.from_subscription(router_b).router.router_fqdn

    if get_router_vendor(router_b) == Vendor.NOKIA:

        class NokiaLAGMemberB(LAGMember):
            interface_name: available_interfaces_choices(  # type: ignore[valid-type]
                router_b,
                initial_user_input.iptrunk_speed,
            )

        ae_members_side_b = Annotated[
            list[NokiaLAGMemberB],
            AfterValidator(validate_unique_list),
            Len(
                min_length=len(user_input_side_a.side_a_ae_members), max_length=len(user_input_side_a.side_a_ae_members)
            ),
        ]
    else:
        ae_members_side_b = juniper_ae_members  # type: ignore[assignment, misc]

    class CreateIptrunkSideBForm(FormPage):
        model_config = ConfigDict(title=f"Provide subscription details for side B of the trunk.({router_b_fqdn})")

        side_b_ae_iface: available_lags_choices(router_b) or str  # type: ignore[valid-type]
        side_b_ae_geant_a_sid: str | None
        side_b_ae_members: ae_members_side_b

        @field_validator("side_b_ae_members")
        def validate_side_b_ae_members(cls, side_b_ae_members: list[LAGMember]) -> list[LAGMember]:
            validate_iptrunk_unique_interface(side_b_ae_members)
            vendor = get_router_vendor(router_b)
            validate_interface_name_list(side_b_ae_members, vendor)
            return side_b_ae_members

    user_input_side_b = yield CreateIptrunkSideBForm

    return (
        initial_user_input.model_dump()
        | verify_minimum_links.model_dump()
        | user_input_router_side_a.model_dump()
        | user_input_side_a.model_dump()
        | user_input_router_side_b.model_dump()
        | user_input_side_b.model_dump()
    )


@step("Create subscription")
def create_subscription(product: UUIDstr, partner: str) -> State:
    """Create a new subscription object in the database."""
    subscription = IptrunkInactive.from_product_id(product, get_partner_by_name(partner)["partner_id"])

    return {
        "subscription": subscription,
        "subscription_id": subscription.subscription_id,
    }


@step("Get information from IPAM")
def get_info_from_ipam(subscription: IptrunkInactive) -> State:
    """Allocate IP resources in :term:`IPAM`."""
    new_ipv4_network = infoblox.allocate_v4_network(
        "TRUNK",
        subscription.iptrunk.iptrunk_description,
    )
    new_ipv6_network = infoblox.allocate_v6_network(
        "TRUNK",
        subscription.iptrunk.iptrunk_description,
    )
    subscription.iptrunk.iptrunk_ipv4_network = new_ipv4_network
    subscription.iptrunk.iptrunk_ipv6_network = new_ipv6_network

    return {
        "subscription": subscription,
        "new_ipv4_network": str(new_ipv4_network),
        "new_ipv6_network": str(new_ipv6_network),
    }


@step("Check if assigned networks are already taken by other trunk subscription")
def check_existing_trunk_allocations(subscription: IptrunkInactive) -> None:
    """Check if there already is a trunk with the same network resources assigned to it."""
    if not subscription.iptrunk.iptrunk_ipv4_network or not subscription.iptrunk.iptrunk_ipv6_network:
        msg = "Missing IP resources in subscription object."
        raise ProcessFailureError(
            msg, details=[subscription.iptrunk.iptrunk_ipv4_network, subscription.iptrunk.iptrunk_ipv6_network]
        )

    all_trunks = [
        Iptrunk.from_subscription(trunk["subscription_id"])
        for trunk in get_non_terminated_iptrunk_subscriptions()
        if trunk["subscription_id"] != subscription.subscription_id
    ]
    overlapping_ipv4_networks = [
        (trunk.description, trunk.iptrunk.iptrunk_ipv4_network)
        for trunk in all_trunks
        if trunk.iptrunk.iptrunk_ipv4_network.overlaps(subscription.iptrunk.iptrunk_ipv4_network)
    ]
    overlapping_ipv6_networks = [
        (trunk.description, trunk.iptrunk.iptrunk_ipv6_network)
        for trunk in all_trunks
        if trunk.iptrunk.iptrunk_ipv6_network.overlaps(subscription.iptrunk.iptrunk_ipv6_network)
    ]

    if overlapping_ipv4_networks or overlapping_ipv6_networks:
        msg = "Newly assigned IP networks overlap with existing IP trunk subscriptions, please investigate."
        raise ProcessFailureError(msg, details=[overlapping_ipv4_networks, overlapping_ipv6_networks])


@step("Check for existing DNS records in the assigned IPv4 network")
def dig_all_hosts_v4(new_ipv4_network: str) -> None:
    """Check if any hosts have already been assigned inside the IPv4 network in Netbox."""
    registered_hosts = [host for host in IPv4Network(new_ipv4_network) if infoblox.find_host_by_ip(IPv4Address(host))]

    if registered_hosts:
        msg = "One or more hosts in the assigned IPv4 network are already registered, please investigate."
        raise ProcessFailureError(msg, details=registered_hosts)


@step("Check for existing DNS records in the assigned IPv6 network")
def dig_all_hosts_v6(new_ipv6_network: str) -> None:
    """Check if any hosts have already been assigned inside the IPv6 network in Netbox."""
    registered_hosts = [host for host in IPv6Network(new_ipv6_network) if infoblox.find_host_by_ip(IPv6Address(host))]

    if registered_hosts:
        msg = "One or more hosts in the assigned IPv6 network are already registered, please investigate."
        raise ProcessFailureError(msg, details=registered_hosts)


@step("Ping all hosts in the assigned IPv4 network")
def ping_all_hosts_v4(new_ipv4_network: str) -> None:
    """Ping all hosts in the IPv4 network to verify they're not in use."""
    unavailable_hosts = [host for host in IPv4Network(new_ipv4_network) if ping(str(host), timeout=1)]

    if unavailable_hosts:
        msg = "One or more hosts in the assigned IPv4 network are responding to ping, please investigate."
        raise ProcessFailureError(msg, details=unavailable_hosts)


@step("Ping all hosts in the assigned IPv6 network")
def ping_all_hosts_v6(new_ipv6_network: str) -> State:
    """Ping all hosts in the IPv6 network to verify they're not in use."""
    unavailable_hosts = [host for host in IPv6Network(new_ipv6_network) if ping(str(host), timeout=1)]

    if unavailable_hosts:
        msg = "One or more hosts in the assigned IPv6 network are responding to ping, please investigate."
        raise ProcessFailureError(msg, details=unavailable_hosts)

    return {"__remove_keys": ["new_ipv4_network", "new_ipv6_network"]}


@step("Initialize subscription")
def initialize_subscription(
    subscription: IptrunkInactive,
    geant_s_sid: str | None,
    iptrunk_type: IptrunkType,
    iptrunk_description: str | None,
    iptrunk_speed: PhysicalPortCapacity,
    iptrunk_minimum_links: int,
    side_a_node_id: str,
    side_a_ae_iface: str,
    side_a_ae_geant_a_sid: str | None,
    side_a_ae_members: list[dict],
    side_b_node_id: str,
    side_b_ae_iface: str,
    side_b_ae_geant_a_sid: str | None,
    side_b_ae_members: list[dict],
) -> State:
    """Take all input from the user, and store it in the database."""
    oss_params = load_oss_params()
    side_a = Router.from_subscription(side_a_node_id).router
    side_b = Router.from_subscription(side_b_node_id).router
    subscription.iptrunk.geant_s_sid = geant_s_sid
    subscription.iptrunk.iptrunk_description = iptrunk_description
    subscription.iptrunk.iptrunk_type = iptrunk_type
    subscription.iptrunk.iptrunk_speed = iptrunk_speed
    subscription.iptrunk.iptrunk_isis_metric = oss_params.GENERAL.isis_high_metric
    subscription.iptrunk.iptrunk_minimum_links = iptrunk_minimum_links

    subscription.iptrunk.iptrunk_sides[0].iptrunk_side_node = side_a
    subscription.iptrunk.iptrunk_sides[0].iptrunk_side_ae_iface = side_a_ae_iface
    subscription.iptrunk.iptrunk_sides[0].iptrunk_side_ae_geant_a_sid = side_a_ae_geant_a_sid
    for member in side_a_ae_members:
        subscription.iptrunk.iptrunk_sides[0].iptrunk_side_ae_members.append(
            IptrunkInterfaceBlockInactive.new(subscription_id=uuid4(), **member),
        )

    subscription.iptrunk.iptrunk_sides[1].iptrunk_side_node = side_b
    subscription.iptrunk.iptrunk_sides[1].iptrunk_side_ae_iface = side_b_ae_iface
    subscription.iptrunk.iptrunk_sides[1].iptrunk_side_ae_geant_a_sid = side_b_ae_geant_a_sid
    for member in side_b_ae_members:
        subscription.iptrunk.iptrunk_sides[1].iptrunk_side_ae_members.append(
            IptrunkInterfaceBlockInactive.new(subscription_id=uuid4(), **member),
        )
    side_names = sorted([side_a.router_site.site_name, side_b.router_site.site_name])
    subscription.description = f"IP trunk {side_names[0]} {side_names[1]}, geant_s_sid:{geant_s_sid}"

    return {"subscription": subscription}


@step("[DRY RUN] Provision IP trunk interface")
def provision_ip_trunk_iface_dry(
    subscription: IptrunkInactive,
    callback_route: str,
    process_id: UUIDstr,
    tt_number: str,
) -> State:
    """Perform a dry run of deploying configuration on both sides of the trunk."""
    extra_vars = {
        "wfo_trunk_json": json.loads(json_dumps(subscription)),
        "dry_run": True,
        "verb": "deploy",
        "config_object": "trunk_interface",
        "commit_comment": f"GSO_PROCESS_ID: {process_id} - TT_NUMBER: {tt_number} - Deploy config for "
        f"{subscription.iptrunk.geant_s_sid}",
    }

    execute_playbook(
        playbook_name="iptrunks.yaml",
        callback_route=callback_route,
        inventory=f"{subscription.iptrunk.iptrunk_sides[0].iptrunk_side_node.router_fqdn}\n"
        f"{subscription.iptrunk.iptrunk_sides[1].iptrunk_side_node.router_fqdn}\n",
        extra_vars=extra_vars,
    )

    return {"subscription": subscription}


@step("[FOR REAL] Provision IP trunk interface")
def provision_ip_trunk_iface_real(
    subscription: IptrunkInactive,
    callback_route: str,
    process_id: UUIDstr,
    tt_number: str,
) -> State:
    """Deploy IP trunk configuration on both sides."""
    extra_vars = {
        "wfo_trunk_json": json.loads(json_dumps(subscription)),
        "dry_run": False,
        "verb": "deploy",
        "config_object": "trunk_interface",
        "commit_comment": f"GSO_PROCESS_ID: {process_id} - TT_NUMBER: {tt_number} - Deploy config for "
        f"{subscription.iptrunk.geant_s_sid}",
    }

    execute_playbook(
        playbook_name="iptrunks.yaml",
        callback_route=callback_route,
        inventory=f"{subscription.iptrunk.iptrunk_sides[0].iptrunk_side_node.router_fqdn}\n"
        f"{subscription.iptrunk.iptrunk_sides[1].iptrunk_side_node.router_fqdn}\n",
        extra_vars=extra_vars,
    )

    return {"subscription": subscription}


@step("Check IP connectivity of the trunk")
def check_ip_trunk_connectivity(
    subscription: IptrunkInactive,
    callback_route: str,
) -> State:
    """Check successful connectivity across the new trunk."""
    extra_vars = {"wfo_ip_trunk_json": json.loads(json_dumps(subscription)), "check": "ping"}

    execute_playbook(
        playbook_name="iptrunks_checks.yaml",
        callback_route=callback_route,
        inventory=subscription.iptrunk.iptrunk_sides[0].iptrunk_side_node.router_fqdn,  # type: ignore[arg-type]
        extra_vars=extra_vars,
    )

    return {"subscription": subscription}


@step("[DRY RUN] Provision IP trunk ISIS interface")
def provision_ip_trunk_isis_iface_dry(
    subscription: IptrunkInactive,
    callback_route: str,
    process_id: UUIDstr,
    tt_number: str,
) -> State:
    """Perform a dry run of deploying :term:`ISIS` configuration."""
    extra_vars = {
        "wfo_trunk_json": json.loads(json_dumps(subscription)),
        "dry_run": True,
        "verb": "deploy",
        "config_object": "isis_interface",
        "commit_comment": f"GSO_PROCESS_ID: {process_id} - TT_NUMBER: {tt_number} - Deploy config for "
        f"{subscription.iptrunk.geant_s_sid}",
    }

    execute_playbook(
        playbook_name="iptrunks.yaml",
        callback_route=callback_route,
        inventory=f"{subscription.iptrunk.iptrunk_sides[0].iptrunk_side_node.router_fqdn}\n"
        f"{subscription.iptrunk.iptrunk_sides[1].iptrunk_side_node.router_fqdn}\n",
        extra_vars=extra_vars,
    )

    return {"subscription": subscription}


@step("[FOR REAL] Provision IP trunk ISIS interface")
def provision_ip_trunk_isis_iface_real(
    subscription: IptrunkInactive,
    callback_route: str,
    process_id: UUIDstr,
    tt_number: str,
) -> State:
    """Deploy :term:`ISIS` configuration on both sides."""
    extra_vars = {
        "wfo_trunk_json": json.loads(json_dumps(subscription)),
        "dry_run": False,
        "verb": "deploy",
        "config_object": "isis_interface",
        "commit_comment": f"GSO_PROCESS_ID: {process_id} - TT_NUMBER: {tt_number} - Deploy config for "
        f"{subscription.iptrunk.geant_s_sid}",
    }

    execute_playbook(
        playbook_name="iptrunks.yaml",
        callback_route=callback_route,
        inventory=f"{subscription.iptrunk.iptrunk_sides[0].iptrunk_side_node.router_fqdn}\n"
        f"{subscription.iptrunk.iptrunk_sides[1].iptrunk_side_node.router_fqdn}\n",
        extra_vars=extra_vars,
    )

    return {"subscription": subscription}


@step("Check ISIS adjacency")
def check_ip_trunk_isis(
    subscription: IptrunkInactive,
    callback_route: str,
) -> State:
    """Run an Ansible playbook to confirm :term:`ISIS` adjacency."""
    extra_vars = {"wfo_ip_trunk_json": json.loads(json_dumps(subscription)), "check": "isis"}

    execute_playbook(
        playbook_name="iptrunks_checks.yaml",
        callback_route=callback_route,
        inventory=subscription.iptrunk.iptrunk_sides[0].iptrunk_side_node.router_fqdn,  # type: ignore[arg-type]
        extra_vars=extra_vars,
    )

    return {"subscription": subscription}


@step("Register DNS records for both sides of the trunk")
def register_dns_records(subscription: IptrunkInactive) -> State:
    """Register :term:`DNS` records for both sides of the newly created IPtrunk."""
    for index, side in enumerate(subscription.iptrunk.iptrunk_sides):
        fqdn = f"{side.iptrunk_side_ae_iface}-0.{side.iptrunk_side_node.router_fqdn}"
        if not (subscription.iptrunk.iptrunk_ipv4_network and subscription.iptrunk.iptrunk_ipv6_network):
            msg = f"Missing IP resources in trunk, cannot allocate DNS record for side {fqdn}!"
            raise ValueError(msg)
        ipv4_addr = subscription.iptrunk.iptrunk_ipv4_network[index]
        ipv6_addr = subscription.iptrunk.iptrunk_ipv6_network[index + 1]

        infoblox.create_host_by_ip(fqdn, ipv4_addr, ipv6_addr, "TRUNK", str(subscription.subscription_id))

    return {"subscription": subscription}


@step("NextBox integration")
def reserve_interfaces_in_netbox(subscription: IptrunkInactive) -> State:
    """Create the :term:`LAG` interfaces in NetBox and attach the lag interfaces to the physical interfaces."""
    nbclient = NetboxClient()
    for trunk_side in subscription.iptrunk.iptrunk_sides:
        if get_router_vendor(trunk_side.iptrunk_side_node.owner_subscription_id) == Vendor.NOKIA:
            # Create :term:`LAG` interfaces
            lag_interface: Interfaces = nbclient.create_interface(
                iface_name=trunk_side.iptrunk_side_ae_iface,  # type: ignore[arg-type]
                interface_type="lag",
                device_name=trunk_side.iptrunk_side_node.router_fqdn,  # type: ignore[arg-type]
                description=str(subscription.subscription_id),
                enabled=True,
            )
            # Attach physical interfaces to :term:`LAG`
            # Update interface description to subscription ID
            # Reserve interfaces
            for interface in trunk_side.iptrunk_side_ae_members:
                nbclient.attach_interface_to_lag(
                    device_name=trunk_side.iptrunk_side_node.router_fqdn,  # type: ignore[arg-type]
                    lag_name=lag_interface.name,
                    iface_name=interface.interface_name,  # type: ignore[arg-type]
                    description=str(subscription.subscription_id),
                )
                nbclient.reserve_interface(
                    device_name=trunk_side.iptrunk_side_node.router_fqdn,  # type: ignore[arg-type]
                    iface_name=interface.interface_name,  # type: ignore[arg-type]
                )
    return {
        "subscription": subscription,
    }


def _allocate_interfaces_in_netbox(iptrunk_side: IptrunkSideBlockInactive) -> None:
    for interface in iptrunk_side.iptrunk_side_ae_members:
        fqdn = iptrunk_side.iptrunk_side_node.router_fqdn
        iface_name = interface.interface_name
        if not fqdn or not iface_name:
            msg = f"FQDN and/or interface name missing in subscription {interface.owner_subscription_id}"
            raise ValueError(msg)

        NetboxClient().allocate_interface(device_name=fqdn, iface_name=iface_name)


@step("Allocate interfaces in Netbox for side A")
def netbox_allocate_side_a_interfaces(subscription: IptrunkInactive) -> None:
    """Allocate the :term:`LAG` interfaces for the Nokia router on side A."""
    _allocate_interfaces_in_netbox(subscription.iptrunk.iptrunk_sides[0])


@step("Allocate interfaces in Netbox for side B")
def netbox_allocate_side_b_interfaces(subscription: IptrunkInactive) -> None:
    """Allocate the :term:`LAG` interfaces for the Nokia router on side B."""
    _allocate_interfaces_in_netbox(subscription.iptrunk.iptrunk_sides[1])


@step("Create a new SharePoint checklist item")
def create_new_sharepoint_checklist(subscription: IptrunkProvisioning, tt_number: str, process_id: UUIDstr) -> State:
    """Create a new checklist item in SharePoint for approving this IPtrunk."""
    new_list_item_url = SharePointClient().add_list_item(
        list_name="ip_trunk",
        fields={
            "Title": f"{subscription.description} - {subscription.iptrunk.geant_s_sid}",
            "TT_NUMBER": tt_number,
            "GAP_PROCESS_URL": f"{load_oss_params().GENERAL.public_hostname}/workflows/{process_id}",
        },
    )

    return {"checklist_url": new_list_item_url}


@workflow(
    "Create IP trunk",
    initial_input_form=wrap_create_initial_input_form(initial_input_form_generator),
    target=Target.CREATE,
)
def create_iptrunk() -> StepList:
    """Create a new IP trunk.

    * Create the subscription object in the database
    * Gather relevant information from Infoblox
    * Reserve interfaces in Netbox
    * Deploy configuration on the two sides of the trunk, first as a dry run
    * Check connectivity on the new trunk
    * Deploy the new :term:`ISIS` metric on the trunk, first as a dry run
    * Verify :term:`ISIS` adjacency
    * Allocate the interfaces in Netbox
    * Set the subscription to active in the database
    """
    side_a_is_nokia = conditional(lambda state: get_router_vendor(state["side_a_node_id"]) == Vendor.NOKIA)
    side_b_is_nokia = conditional(lambda state: get_router_vendor(state["side_b_node_id"]) == Vendor.NOKIA)

    assign_ip_networks = step_group(
        name="Assign IP networks",
        steps=(
            begin
            >> get_info_from_ipam
            >> check_existing_trunk_allocations
            >> dig_all_hosts_v4
            >> dig_all_hosts_v6
            >> ping_all_hosts_v4
            >> ping_all_hosts_v6
        ),
    )

    return (
        begin
        >> create_subscription
        >> store_process_subscription(Target.CREATE)
        >> initialize_subscription
        >> assign_ip_networks
        >> reserve_interfaces_in_netbox
        >> lso_interaction(provision_ip_trunk_iface_dry)
        >> lso_interaction(provision_ip_trunk_iface_real)
        >> lso_interaction(check_ip_trunk_connectivity)
        >> lso_interaction(provision_ip_trunk_isis_iface_dry)
        >> lso_interaction(provision_ip_trunk_isis_iface_real)
        >> lso_interaction(check_ip_trunk_isis)
        >> register_dns_records
        >> side_a_is_nokia(netbox_allocate_side_a_interfaces)
        >> side_b_is_nokia(netbox_allocate_side_b_interfaces)
        >> set_status(SubscriptionLifecycle.PROVISIONING)
        >> create_new_sharepoint_checklist
        >> prompt_sharepoint_checklist_url
        >> resync
        >> done
    )