# -*- coding: utf-8 -*-
# ---------------------------------------------------------------------
# inv.interface application
# ---------------------------------------------------------------------
# Copyright (C) 2007-2019 The NOC Project
# See LICENSE for details
# ---------------------------------------------------------------------

# Third-party modules
from mongoengine import Q

# NOC modules
from noc.lib.app.extapplication import ExtApplication, view
from noc.sa.models.managedobject import ManagedObject
from noc.inv.models.interface import Interface
from noc.inv.models.subinterface import SubInterface
from noc.inv.models.interfaceprofile import InterfaceProfile
from noc.sa.interfaces.base import (
    StringParameter,
    ListOfParameter,
    DocumentParameter,
    ModelParameter,
)
from noc.main.models.resourcestate import ResourceState
from noc.project.models.project import Project
from noc.vc.models.vcdomain import VCDomain
from noc.core.text import split_alnum
from noc.core.translation import ugettext as _
from noc.config import config


class InterfaceAppplication(ExtApplication):
    """
    inv.interface application
    """

    title = _("Interfaces")
    menu = _("Interfaces")

    mrt_config = {
        "get_mac": {
            "map_script": "get_mac_address_table",
            "timeout": config.script.timeout,
            "access": "get_mac",
        }
    }

    @view(url="^(?P<managed_object>\d+)/$", method=["GET"], access="view", api=True)
    def api_get_interfaces(self, request, managed_object):
        """
        GET interfaces
        :param managed_object:
        :return:
        """

        def sorted_iname(s):
            return sorted(s, key=lambda x: split_alnum(x["name"]))

        def get_style(i):
            profile = i.profile
            if profile:
                try:
                    return style_cache[profile.id]
                except KeyError:
                    pass
                if profile.style:
                    s = profile.style.css_class_name
                else:
                    s = ""
                style_cache[profile.id] = s
                return s
            else:
                return ""

        def get_link(i):
            link = i.link
            if not link:
                return None
            if link.is_ptp:
                # ptp
                o = link.other_ptp(i)
                label = "%s:%s" % (o.managed_object.name, o.name)
            elif link.is_lag:
                # unresolved LAG
                o = [ii for ii in link.other(i) if ii.managed_object.id != i.managed_object.id]
                label = "LAG %s: %s" % (o[0].managed_object.name, ", ".join(ii.name for ii in o))
            else:
                # Broadcast
                label = ", ".join(
                    "%s:%s" % (ii.managed_object.name, ii.name) for ii in link.other(i)
                )
            return {"id": str(link.id), "label": label}

        # Get object
        o = self.get_object_or_404(ManagedObject, id=int(managed_object))
        if not o.has_access(request.user):
            return self.response_forbidden("Permission denied")
        # Physical interfaces
        # @todo: proper ordering
        default_state = ResourceState.get_default()
        style_cache = {}  # profile_id -> css_style
        l1 = [
            {
                "id": str(i.id),
                "name": i.name,
                "description": i.description,
                "mac": i.mac,
                "ifindex": i.ifindex,
                "lag": (i.aggregated_interface.name if i.aggregated_interface else ""),
                "link": get_link(i),
                "profile": str(i.profile.id) if i.profile else None,
                "profile__label": unicode(i.profile) if i.profile else None,
                "enabled_protocols": i.enabled_protocols,
                "project": i.project.id if i.project else None,
                "project__label": unicode(i.project) if i.project else None,
                "state": i.state.id if i.state else default_state.id,
                "state__label": unicode(i.state if i.state else default_state),
                "vc_domain": i.vc_domain.id if i.vc_domain else None,
                "vc_domain__label": unicode(i.vc_domain) if i.vc_domain else None,
                "row_class": get_style(i),
            }
            for i in Interface.objects.filter(managed_object=o.id, type="physical")
        ]
        # LAG
        lag = [
            {
                "id": str(i.id),
                "name": i.name,
                "description": i.description,
                "members": [
                    j.name
                    for j in Interface.objects.filter(
                        managed_object=o.id, aggregated_interface=i.id
                    )
                ],
                "profile": str(i.profile.id) if i.profile else None,
                "profile__label": unicode(i.profile) if i.profile else None,
                "enabled_protocols": i.enabled_protocols,
                "project": i.project.id if i.project else None,
                "project__label": unicode(i.project) if i.project else None,
                "state": i.state.id if i.state else default_state.id,
                "state__label": unicode(i.state if i.state else default_state),
                "vc_domain": i.vc_domain.id if i.vc_domain else None,
                "vc_domain__label": unicode(i.vc_domain) if i.vc_domain else None,
                "row_class": get_style(i),
            }
            for i in Interface.objects.filter(managed_object=o.id, type="aggregated")
        ]
        # L2 interfaces
        l2 = [
            {
                "name": i.name,
                "description": i.description,
                "untagged_vlan": i.untagged_vlan,
                "tagged_vlans": i.tagged_vlans,
            }
            for i in SubInterface.objects.filter(managed_object=o.id, enabled_afi="BRIDGE")
        ]
        # L3 interfaces
        q = Q(enabled_afi="IPv4") | Q(enabled_afi="IPv6")
        l3 = [
            {
                "name": i.name,
                "description": i.description,
                "ipv4_addresses": i.ipv4_addresses,
                "ipv6_addresses": i.ipv6_addresses,
                "enabled_protocols": i.enabled_protocols,
                "vlan": i.vlan_ids,
                "vrf": i.forwarding_instance.name if i.forwarding_instance else "",
            }
            for i in SubInterface.objects.filter(managed_object=o.id).filter(q)
        ]
        return {
            "l1": sorted_iname(l1),
            "lag": sorted_iname(lag),
            "l2": sorted_iname(l2),
            "l3": sorted_iname(l3),
        }

    @view(
        url="^link/$",
        method=["POST"],
        validate={
            "type": StringParameter(choices=["ptp"]),
            "interfaces": ListOfParameter(element=DocumentParameter(Interface)),
        },
        access="link",
        api=True,
    )
    def api_link(self, request, type, interfaces):
        if type == "ptp":
            if len(interfaces) == 2:
                interfaces[0].link_ptp(interfaces[1])
                return {"status": True}
            else:
                raise ValueError("Invalid interfaces length")
        return {"status": False}

    @view(url="^unlink/(?P<iface_id>[0-9a-f]{24})/$", method=["POST"], access="link", api=True)
    def api_unlink(self, request, iface_id):
        i = Interface.objects.filter(id=iface_id).first()
        if not i:
            return self.response_not_found()
        try:
            i.unlink()
            return {"status": True, "msg": "Unlinked"}
        except ValueError as why:
            return {"status": False, "msg": str(why)}

    @view(url="^unlinked/(?P<object_id>\d+)/$", method=["GET"], access="link", api=True)
    def api_unlinked(self, request, object_id):
        def get_label(i):
            if i.description:
                return "%s (%s)" % (i.name, i.description)
            else:
                return i.name

        o = self.get_object_or_404(ManagedObject, id=int(object_id))
        r = [
            {"id": str(i.id), "label": get_label(i)}
            for i in Interface.objects.filter(managed_object=o.id, type="physical").order_by("name")
            if not i.link
        ]
        return sorted(r, key=lambda x: split_alnum(x["label"]))

    @view(
        url="^l1/(?P<iface_id>[0-9a-f]{24})/change_profile/$",
        validate={"profile": DocumentParameter(InterfaceProfile)},
        method=["POST"],
        access="profile",
        api=True,
    )
    def api_change_profile(self, request, iface_id, profile):
        i = Interface.objects.filter(id=iface_id).first()
        if not i:
            return self.response_not_found()
        if i.profile != profile:
            i.profile = profile
            i.profile_locked = True
            i.save()
        return True

    @view(
        url="^l1/(?P<iface_id>[0-9a-f]{24})/change_state/$",
        validate={"state": ModelParameter(ResourceState)},
        method=["POST"],
        access="profile",
        api=True,
    )
    def api_change_state(self, request, iface_id, state):
        i = Interface.objects.filter(id=iface_id).first()
        if not i:
            return self.response_not_found()
        if i.state != state:
            i.state = state
            i.save()
        return True

    @view(
        url="^l1/(?P<iface_id>[0-9a-f]{24})/change_project/$",
        validate={"project": ModelParameter(Project, required=False)},
        method=["POST"],
        access="profile",
        api=True,
    )
    def api_change_project(self, request, iface_id, project):
        i = Interface.objects.filter(id=iface_id).first()
        if not i:
            return self.response_not_found()
        if i.project != project:
            i.project = project
            i.save()
        return True

    @view(
        url="^l1/(?P<iface_id>[0-9a-f]{24})/change_vc_domain/$",
        validate={"vc_domain": ModelParameter(VCDomain, required=False)},
        method=["POST"],
        access="profile",
        api=True,
    )
    def api_change_vc_domain(self, request, iface_id, vc_domain):
        i = Interface.objects.filter(id=iface_id).first()
        if not i:
            return self.response_not_found()
        if i.vc_domain != vc_domain:
            i.vc_domain = vc_domain
            i.save()
        return True
