# -*- 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 aiohttp.web import HTTPConflict

from gns3server.web.route import Route
from gns3server.compute.docker import Docker
from gns3server.schemas.node import NODE_CAPTURE_SCHEMA
from gns3server.schemas.nio import NIO_SCHEMA

from gns3server.schemas.docker import (
    DOCKER_CREATE_SCHEMA,
    DOCKER_OBJECT_SCHEMA,
    DOCKER_LIST_IMAGES_SCHEMA
)


class DockerHandler:
    """API entry points for Docker containers."""

    @Route.post(
        r"/projects/{project_id}/docker/nodes",
        parameters={
            "project_id": "Project UUID"
        },
        status_codes={
            201: "Instance created",
            400: "Invalid request",
            409: "Conflict"
        },
        description="Create a new Docker container",
        input=DOCKER_CREATE_SCHEMA,
        output=DOCKER_OBJECT_SCHEMA)
    async def create(request, response):
        docker_manager = Docker.instance()
        container = await docker_manager.create_node(request.json.pop("name"),
                                                          request.match_info["project_id"],
                                                          request.json.get("node_id"),
                                                          image=request.json.pop("image"),
                                                          start_command=request.json.get("start_command"),
                                                          environment=request.json.get("environment"),
                                                          adapters=request.json.get("adapters"),
                                                          console=request.json.get("console"),
                                                          console_type=request.json.get("console_type"),
                                                          console_resolution=request.json.get("console_resolution", "1024x768"),
                                                          console_http_port=request.json.get("console_http_port", 80),
                                                          console_http_path=request.json.get("console_http_path", "/"),
                                                          aux=request.json.get("aux"),
                                                          extra_hosts=request.json.get("extra_hosts"),
                                                          extra_volumes=request.json.get("extra_volumes"))
        for name, value in request.json.items():
            if name != "node_id":
                if hasattr(container, name) and getattr(container, name) != value:
                    setattr(container, name, value)

        response.set_status(201)
        response.json(container)

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/start",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID"
        },
        status_codes={
            204: "Instance started",
            400: "Invalid request",
            404: "Instance doesn't exist"
        },
        description="Start a Docker container")
    async def start(request, response):
        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        await container.start()
        response.set_status(204)

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/stop",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID"
        },
        status_codes={
            204: "Instance stopped",
            400: "Invalid request",
            404: "Instance doesn't exist"
        },
        description="Stop a Docker container")
    async def stop(request, response):
        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        await container.stop()
        response.set_status(204)

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/suspend",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID"
        },
        status_codes={
            204: "Instance suspended",
            400: "Invalid request",
            404: "Instance doesn't exist"
        },
        description="Suspend a Docker container")
    async def suspend(request, response):
        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        await container.pause()
        response.set_status(204)

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/reload",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID"
        },
        status_codes={
            204: "Instance restarted",
            400: "Invalid request",
            404: "Instance doesn't exist"
        },
        description="Restart a Docker container")
    async def reload(request, response):
        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        await container.restart()
        response.set_status(204)

    @Route.delete(
        r"/projects/{project_id}/docker/nodes/{node_id}",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID",
        },
        status_codes={
            204: "Instance deleted",
            400: "Invalid request",
            404: "Instance doesn't exist"
        },
        description="Delete a Docker container")
    async def delete(request, response):
        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        await container.delete()
        response.set_status(204)

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/duplicate",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID"
        },
        status_codes={
            201: "Instance duplicated",
            404: "Instance doesn't exist"
        },
        description="Duplicate a Docker instance")
    async def duplicate(request, response):

        new_node = await Docker.instance().duplicate_node(
            request.match_info["node_id"],
            request.json["destination_node_id"]
        )
        response.set_status(201)
        response.json(new_node)

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/pause",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID"
        },
        status_codes={
            204: "Instance paused",
            400: "Invalid request",
            404: "Instance doesn't exist"
        },
        description="Pause a Docker container")
    async def pause(request, response):
        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        await container.pause()
        response.set_status(204)

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/unpause",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID"
        },
        status_codes={
            204: "Instance unpaused",
            400: "Invalid request",
            404: "Instance doesn't exist"
        },
        description="Unpause a Docker container")
    async def unpause(request, response):
        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        await container.unpause()
        response.set_status(204)

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/nio",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID",
            "adapter_number": "Adapter where the nio should be added",
            "port_number": "Port on the adapter (always 0)"
        },
        status_codes={
            201: "NIO created",
            400: "Invalid request",
            404: "Instance doesn't exist"
        },
        description="Add a NIO to a Docker container",
        input=NIO_SCHEMA,
        output=NIO_SCHEMA)
    async def create_nio(request, response):
        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        nio_type = request.json["type"]
        if nio_type != "nio_udp":
            raise HTTPConflict(text="NIO of type {} is not supported".format(nio_type))
        adapter_number = int(request.match_info["adapter_number"])
        nio = docker_manager.create_nio(request.json)
        await container.adapter_add_nio_binding(adapter_number, nio)
        response.set_status(201)
        response.json(nio)

    @Route.put(
        r"/projects/{project_id}/docker/nodes/{node_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/nio",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID",
            "adapter_number": "Network adapter where the nio is located",
            "port_number": "Port from where the nio should be updated (always 0)"
        },
        status_codes={
            201: "NIO updated",
            400: "Invalid request",
            404: "Instance doesn't exist"
        },
        input=NIO_SCHEMA,
        output=NIO_SCHEMA,
        description="Update a NIO on a Docker instance")
    async def update_nio(request, response):

        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        adapter_number = int(request.match_info["adapter_number"])
        nio = container.get_nio(adapter_number)
        if "filters" in request.json and nio:
            nio.filters = request.json["filters"]
        await container.adapter_update_nio_binding(adapter_number, nio)
        response.set_status(201)
        response.json(request.json)

    @Route.delete(
        r"/projects/{project_id}/docker/nodes/{node_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/nio",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID",
            "adapter_number": "Adapter where the nio should be added",
            "port_number": "Port on the adapter (always 0)"
        },
        status_codes={
            204: "NIO deleted",
            400: "Invalid request",
            404: "Instance doesn't exist"
        },
        description="Remove a NIO from a Docker container")
    async def delete_nio(request, response):
        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        adapter_number = int(request.match_info["adapter_number"])
        await container.adapter_remove_nio_binding(adapter_number)
        response.set_status(204)

    @Route.put(
        r"/projects/{project_id}/docker/nodes/{node_id}",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID"
        },
        status_codes={
            200: "Instance updated",
            400: "Invalid request",
            404: "Instance doesn't exist",
            409: "Conflict"
        },
        description="Update a Docker instance",
        input=DOCKER_OBJECT_SCHEMA,
        output=DOCKER_OBJECT_SCHEMA)
    async def update(request, response):

        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])

        props = [
            "name", "console", "aux", "console_type", "console_resolution",
            "console_http_port", "console_http_path", "start_command",
            "environment", "adapters", "extra_hosts", "extra_volumes"
        ]

        changed = False
        for prop in props:
            if prop in request.json and request.json[prop] != getattr(container, prop):
                setattr(container, prop, request.json[prop])
                changed = True
        # We don't call container.update for nothing because it will restart the container
        if changed:
            await container.update()
        container.updated()
        response.json(container)

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/start_capture",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID",
            "adapter_number": "Adapter to start a packet capture",
            "port_number": "Port on the adapter (always 0)"
        },
        status_codes={
            200: "Capture started",
            400: "Invalid request",
            404: "Instance doesn't exist",
            409: "Node not started"
        },
        description="Start a packet capture on a Docker container instance",
        input=NODE_CAPTURE_SCHEMA)
    async def start_capture(request, response):

        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        adapter_number = int(request.match_info["adapter_number"])
        pcap_file_path = os.path.join(container.project.capture_working_directory(), request.json["capture_file_name"])
        await container.start_capture(adapter_number, pcap_file_path)
        response.json({"pcap_file_path": str(pcap_file_path)})

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/stop_capture",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID",
            "adapter_number": "Adapter to stop a packet capture",
            "port_number": "Port on the adapter (always 0)"
        },
        status_codes={
            204: "Capture stopped",
            400: "Invalid request",
            404: "Instance doesn't exist",
            409: "Container not started"
        },
        description="Stop a packet capture on a Docker container instance")
    async def stop_capture(request, response):

        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        adapter_number = int(request.match_info["adapter_number"])
        await container.stop_capture(adapter_number)
        response.set_status(204)

    @Route.get(
        r"/projects/{project_id}/docker/nodes/{node_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/pcap",
        description="Stream the pcap capture file",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID",
            "adapter_number": "Adapter to steam a packet capture",
            "port_number": "Port on the adapter (always 0)"
        },
        status_codes={
            200: "File returned",
            403: "Permission denied",
            404: "The file doesn't exist"
        })
    async def stream_pcap_file(request, response):

        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        adapter_number = int(request.match_info["adapter_number"])
        nio = container.get_nio(adapter_number)
        await docker_manager.stream_pcap_file(nio, container.project.id, request, response)

    @Route.get(
        r"/docker/images",
        status_codes={
            200: "Success",
        },
        output=DOCKER_LIST_IMAGES_SCHEMA,
        description="Get all available Docker images")
    async def show(request, response):
        docker_manager = Docker.instance()
        images = await docker_manager.list_images()
        response.json(images)

    @Route.get(
        r"/projects/{project_id}/docker/nodes/{node_id}/console/ws",
        description="WebSocket for console",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID",
        })
    async def console_ws(request, response):

        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        return await container.start_websocket_console(request)

    @Route.post(
        r"/projects/{project_id}/docker/nodes/{node_id}/console/reset",
        description="Reset console",
        parameters={
            "project_id": "Project UUID",
            "node_id": "Node UUID",
        },
        status_codes={
            204: "Console has been reset",
            400: "Invalid request",
            404: "Instance doesn't exist",
            409: "Container not started"
        })
    async def reset_console(request, response):

        docker_manager = Docker.instance()
        container = docker_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
        await container.reset_console()
        response.set_status(204)
