# -*- coding: utf-8 -*-
#
# Copyright (C) 2015 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import os
from ..web.route import Route
from ..schemas.virtualbox import VBOX_CREATE_SCHEMA
from ..schemas.virtualbox import VBOX_UPDATE_SCHEMA
from ..schemas.virtualbox import VBOX_NIO_SCHEMA
from ..schemas.virtualbox import VBOX_CAPTURE_SCHEMA
from ..schemas.virtualbox import VBOX_OBJECT_SCHEMA
from ..modules.virtualbox import VirtualBox


class VirtualBoxHandler:

    """
    API entry points for VirtualBox.
    """

    @classmethod
    @Route.get(
        r"/virtualbox/list",
        status_codes={
            200: "Success",
        },
        description="Get all VirtualBox VMs available")
    def show(request, response):

        vbox_manager = VirtualBox.instance()
        vms = yield from vbox_manager.get_list()
        response.json(vms)

    @classmethod
    @Route.post(
        r"/virtualbox",
        status_codes={
            201: "Instance created",
            400: "Invalid project UUID",
            409: "Conflict"
        },
        description="Create a new VirtualBox VM instance",
        input=VBOX_CREATE_SCHEMA,
        output=VBOX_OBJECT_SCHEMA)
    def create(request, response):

        vbox_manager = VirtualBox.instance()
        vm = yield from vbox_manager.create_vm(request.json["name"],
                                               request.json["project_uuid"],
                                               request.json.get("uuid"),
                                               request.json["vmname"],
                                               request.json["linked_clone"],
                                               console=request.json.get("console"))
        response.set_status(201)
        response.json(vm)

    @classmethod
    @Route.get(
        r"/virtualbox/{uuid}",
        parameters={
            "uuid": "Instance UUID"
        },
        status_codes={
            200: "Success",
            404: "Instance doesn't exist"
        },
        description="Get a VirtualBox VM instance",
        output=VBOX_OBJECT_SCHEMA)
    def show(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])
        response.json(vm)

    @classmethod
    @Route.put(
        r"/virtualbox/{uuid}",
        parameters={
            "uuid": "Instance UUID"
        },
        status_codes={
            200: "Instance updated",
            404: "Instance doesn't exist",
            409: "Conflict"
        },
        description="Update a VirtualBox VM instance",
        input=VBOX_UPDATE_SCHEMA,
        output=VBOX_OBJECT_SCHEMA)
    def update(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])

        for name, value in request.json.items():
            if hasattr(vm, name) and getattr(vm, name) != value:
                setattr(vm, name, value)

        # TODO: FINISH UPDATE (adapters).
        response.json(vm)

    @classmethod
    @Route.delete(
        r"/virtualbox/{uuid}",
        parameters={
            "uuid": "Instance UUID"
        },
        status_codes={
            204: "Instance deleted",
            404: "Instance doesn't exist"
        },
        description="Delete a VirtualBox VM instance")
    def delete(request, response):

        yield from VirtualBox.instance().delete_vm(request.match_info["uuid"])
        response.set_status(204)

    @classmethod
    @Route.post(
        r"/virtualbox/{uuid}/start",
        parameters={
            "uuid": "Instance UUID"
        },
        status_codes={
            204: "Instance started",
            400: "Invalid instance UUID",
            404: "Instance doesn't exist"
        },
        description="Start a VirtualBox VM instance")
    def start(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])
        yield from vm.start()
        response.set_status(204)

    @classmethod
    @Route.post(
        r"/virtualbox/{uuid}/stop",
        parameters={
            "uuid": "Instance UUID"
        },
        status_codes={
            204: "Instance stopped",
            400: "Invalid instance UUID",
            404: "Instance doesn't exist"
        },
        description="Stop a VirtualBox VM instance")
    def stop(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])
        yield from vm.stop()
        response.set_status(204)

    @classmethod
    @Route.post(
        r"/virtualbox/{uuid}/suspend",
        parameters={
            "uuid": "Instance UUID"
        },
        status_codes={
            204: "Instance suspended",
            400: "Invalid instance UUID",
            404: "Instance doesn't exist"
        },
        description="Suspend a VirtualBox VM instance")
    def suspend(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])
        yield from vm.suspend()
        response.set_status(204)

    @classmethod
    @Route.post(
        r"/virtualbox/{uuid}/resume",
        parameters={
            "uuid": "Instance UUID"
        },
        status_codes={
            204: "Instance resumed",
            400: "Invalid instance UUID",
            404: "Instance doesn't exist"
        },
        description="Resume a suspended VirtualBox VM instance")
    def suspend(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])
        yield from vm.resume()
        response.set_status(204)

    @classmethod
    @Route.post(
        r"/virtualbox/{uuid}/reload",
        parameters={
            "uuid": "Instance UUID"
        },
        status_codes={
            204: "Instance reloaded",
            400: "Invalid instance UUID",
            404: "Instance doesn't exist"
        },
        description="Reload a VirtualBox VM instance")
    def suspend(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])
        yield from vm.reload()
        response.set_status(204)

    @Route.post(
        r"/virtualbox/{uuid}/ports/{port_id:\d+}/nio",
        parameters={
            "uuid": "Instance UUID",
            "port_id": "ID of the port where the nio should be added"
        },
        status_codes={
            201: "NIO created",
            400: "Invalid instance UUID",
            404: "Instance doesn't exist"
        },
        description="Add a NIO to a VirtualBox VM instance",
        input=VBOX_NIO_SCHEMA,
        output=VBOX_NIO_SCHEMA)
    def create_nio(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])
        nio = vbox_manager.create_nio(vbox_manager.vboxmanage_path, request.json)
        vm.port_add_nio_binding(int(request.match_info["port_id"]), nio)
        response.set_status(201)
        response.json(nio)

    @classmethod
    @Route.delete(
        r"/virtualbox/{uuid}/ports/{port_id:\d+}/nio",
        parameters={
            "uuid": "Instance UUID",
            "port_id": "ID of the port from where the nio should be removed"
        },
        status_codes={
            204: "NIO deleted",
            400: "Invalid instance UUID",
            404: "Instance doesn't exist"
        },
        description="Remove a NIO from a VirtualBox VM instance")
    def delete_nio(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])
        vm.port_remove_nio_binding(int(request.match_info["port_id"]))
        response.set_status(204)

    @Route.post(
        r"/virtualbox/{uuid}/capture/{port_id:\d+}/start",
        parameters={
            "uuid": "Instance UUID",
            "port_id": "ID of the port to start a packet capture"
        },
        status_codes={
            200: "Capture started",
            400: "Invalid instance UUID",
            404: "Instance doesn't exist"
        },
        description="Start a packet capture on a VirtualBox VM instance",
        input=VBOX_CAPTURE_SCHEMA)
    def start_capture(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])
        port_id = int(request.match_info["port_id"])
        pcap_file_path = os.path.join(vm.project.capture_working_directory(), request.json["filename"])
        vm.start_capture(port_id, pcap_file_path)
        response.json({"port_id": port_id,
                       "pcap_file_path": pcap_file_path})

    @Route.post(
        r"/virtualbox/{uuid}/capture/{port_id:\d+}/stop",
        parameters={
            "uuid": "Instance UUID",
            "port_id": "ID of the port to stop a packet capture"
        },
        status_codes={
            204: "Capture stopped",
            400: "Invalid instance UUID",
            404: "Instance doesn't exist"
        },
        description="Stop a packet capture on a VirtualBox VM instance")
    def start_capture(request, response):

        vbox_manager = VirtualBox.instance()
        vm = vbox_manager.get_vm(request.match_info["uuid"])
        vm.stop_capture(int(request.match_info["port_id"]))
        response.set_status(204)