# -*- coding: utf-8 -*-
#
# Copyright (C) 2020 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/>.

"""
API endpoints for VMware nodes.
"""

import os

from fastapi import APIRouter, WebSocket, Depends, status
from fastapi.encoders import jsonable_encoder
from fastapi.responses import StreamingResponse
from uuid import UUID

from gns3server.endpoints import schemas
from gns3server.compute.vmware import VMware
from gns3server.compute.project_manager import ProjectManager
from gns3server.compute.vmware.vmware_vm import VMwareVM

router = APIRouter()

responses = {
    404: {"model": schemas.ErrorMessage, "description": "Could not find project or VMware node"}
}


def dep_node(project_id: UUID, node_id: UUID):
    """
    Dependency to retrieve a node.
    """

    vmware_manager = VMware.instance()
    node = vmware_manager.get_node(str(node_id), project_id=str(project_id))
    return node


@router.post("",
             response_model=schemas.VMware,
             status_code=status.HTTP_201_CREATED,
             responses={409: {"model": schemas.ErrorMessage, "description": "Could not create VMware node"}})
async def create_vmware_node(project_id: UUID, node_data: schemas.VMwareCreate):
    """
    Create a new VMware node.
    """

    vmware_manager = VMware.instance()
    node_data = jsonable_encoder(node_data, exclude_unset=True)
    vm = await vmware_manager.create_node(node_data.pop("name"),
                                          str(project_id),
                                          node_data.get("node_id"),
                                          node_data.pop("vmx_path"),
                                          linked_clone=node_data.pop("linked_clone"),
                                          console=node_data.get("console", None),
                                          console_type=node_data.get("console_type", "telnet"))

    for name, value in node_data.items():
        if name != "node_id":
            if hasattr(vm, name) and getattr(vm, name) != value:
                setattr(vm, name, value)

    return vm.__json__()


@router.get("/{node_id}",
            response_model=schemas.VMware,
            responses=responses)
def get_vmware_node(node: VMwareVM = Depends(dep_node)):
    """
    Return a VMware node.
    """

    return node.__json__()


@router.put("/{node_id}",
            response_model=schemas.VMware,
            responses=responses)
def update_vmware_node(node_data: schemas.VMwareUpdate, node: VMwareVM = Depends(dep_node)):
    """
    Update a VMware node.
    """

    node_data = jsonable_encoder(node_data, exclude_unset=True)
    # update the console first to avoid issue if updating console type
    node.console = node_data.pop("console", node.console)
    for name, value in node_data.items():
        if hasattr(node, name) and getattr(node, name) != value:
            setattr(node, name, value)

    node.updated()
    return node.__json__()


@router.delete("/{node_id}",
               status_code=status.HTTP_204_NO_CONTENT,
               responses=responses)
async def delete_vmware_node(node: VMwareVM = Depends(dep_node)):
    """
    Delete a VMware node.
    """

    await VMware.instance().delete_node(node.id)


@router.post("/{node_id}/start",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def start_vmware_node(node: VMwareVM = Depends(dep_node)):
    """
    Start a VMware node.
    """

    if node.check_hw_virtualization():
        pm = ProjectManager.instance()
        if pm.check_hardware_virtualization(node) is False:
            pass # FIXME: check this
            #raise ComputeError("Cannot start VM with hardware acceleration (KVM/HAX) enabled because hardware virtualization (VT-x/AMD-V) is already used by another software like VMware or VirtualBox")
    await node.start()


@router.post("/{node_id}/stop",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def stop_vmware_node(node: VMwareVM = Depends(dep_node)):
    """
    Stop a VMware node.
    """

    await node.stop()


@router.post("/{node_id}/suspend",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def suspend_vmware_node(node: VMwareVM = Depends(dep_node)):
    """
    Suspend a VMware node.
    """

    await node.suspend()


@router.post("/{node_id}/resume",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def resume_vmware_node(node: VMwareVM = Depends(dep_node)):
    """
    Resume a VMware node.
    """

    await node.resume()


@router.post("/{node_id}/reload",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def reload_vmware_node(node: VMwareVM = Depends(dep_node)):
    """
    Reload a VMware node.
    """

    await node.reload()


@router.post("/{node_id}/adapters/{adapter_number}/ports/{port_number}/nio",
             status_code=status.HTTP_201_CREATED,
             response_model=schemas.UDPNIO,
             responses=responses)
async def create_nio(adapter_number: int,
                     port_number: int,
                     nio_data: schemas.UDPNIO,
                     node: VMwareVM = Depends(dep_node)):
    """
    Add a NIO (Network Input/Output) to the node.
    The port number on the VMware node is always 0.
    """

    nio = VMware.instance().create_nio(jsonable_encoder(nio_data, exclude_unset=True))
    await node.adapter_add_nio_binding(adapter_number, nio)
    return nio.__json__()


@router.put("/{node_id}/adapters/{adapter_number}/ports/{port_number}/nio",
            status_code=status.HTTP_201_CREATED,
            response_model=schemas.UDPNIO,
            responses=responses)
async def update_nio(adapter_number: int,
                     port_number: int,
                     nio_data: schemas.UDPNIO, node: VMwareVM = Depends(dep_node)):
    """
    Update a NIO (Network Input/Output) on the node.
    The port number on the VMware node is always 0.
    """

    nio = node.get_nio(adapter_number)
    if nio_data.filters:
        nio.filters = nio_data.filters
    await node.adapter_update_nio_binding(adapter_number, nio)
    return nio.__json__()


@router.delete("/{node_id}/adapters/{adapter_number}/ports/{port_number}/nio",
               status_code=status.HTTP_204_NO_CONTENT,
               responses=responses)
async def delete_nio(adapter_number: int, port_number: int, node: VMwareVM = Depends(dep_node)):
    """
    Delete a NIO (Network Input/Output) from the node.
    The port number on the VMware node is always 0.
    """

    await node.adapter_remove_nio_binding(adapter_number)


@router.post("/{node_id}/adapters/{adapter_number}/ports/{port_number}/start_capture",
             responses=responses)
async def start_capture(adapter_number: int,
                        port_number: int,
                        node_capture_data: schemas.NodeCapture,
                        node: VMwareVM = Depends(dep_node)):
    """
    Start a packet capture on the node.
    The port number on the VMware node is always 0.
    """

    pcap_file_path = os.path.join(node.project.capture_working_directory(), node_capture_data.capture_file_name)
    await node.start_capture(adapter_number, pcap_file_path)
    return {"pcap_file_path": pcap_file_path}


@router.post("/{node_id}/adapters/{adapter_number}/ports/{port_number}/stop_capture",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def stop_capture(adapter_number: int, port_number: int, node: VMwareVM = Depends(dep_node)):
    """
    Stop a packet capture on the node.
    The port number on the VMware node is always 0.
    """

    await node.stop_capture(adapter_number)


@router.get("/{node_id}/adapters/{adapter_number}/ports/{port_number}/pcap",
            responses=responses)
async def stream_pcap_file(adapter_number: int, port_number: int, node: VMwareVM = Depends(dep_node)):
    """
    Stream the pcap capture file.
    The port number on the VMware node is always 0.
    """

    nio = node.get_nio(adapter_number)
    stream = VMware.instance().stream_pcap_file(nio, node.project.id)
    return StreamingResponse(stream, media_type="application/vnd.tcpdump.pcap")


@router.post("/{node_id}/interfaces/vmnet",
             status_code=status.HTTP_201_CREATED,
             responses=responses)
def allocate_vmnet(node: VMwareVM = Depends(dep_node)) -> dict:
    """
    Allocate a VMware VMnet interface on the server.
    """

    vmware_manager = VMware.instance()
    vmware_manager.refresh_vmnet_list(ubridge=False)
    vmnet = vmware_manager.allocate_vmnet()
    node.vmnets.append(vmnet)
    return {"vmnet": vmnet}


@router.websocket("/{node_id}/console/ws")
async def console_ws(websocket: WebSocket, node: VMwareVM = Depends(dep_node)):
    """
    Console WebSocket.
    """

    await node.start_websocket_console(websocket)


@router.post("/{node_id}/console/reset",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def reset_console(node: VMwareVM = Depends(dep_node)):

    await node.reset_console()