import asyncio
import logging
import os
import queue
import random
import string
import subprocess
import time
from operator import itemgetter
from pathlib import Path

import bpy
import mathutils
from bpy_extras.io_utils import ExportHelper
from bpy.app.handlers import persistent

from . import environment, presence, ui, utils, delayable
import msgpack
from .libs.replication.replication.data import ReplicatedDataFactory
from .libs.replication.replication.interface import Session
from .libs.replication.replication.exception import NonAuthorizedOperationError
from . import bl_types

logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

client = None
delayables = []
ui_context = None


def add_datablock(datablock):
    global client

    new_uuid = client.add(datablock)
    return new_uuid


# TODO: cleanup
def init_supported_datablocks(supported_types_id):
    global client

    for type_id in supported_types_id:
        if hasattr(bpy.data, type_id):
            for item in getattr(bpy.data, type_id):
                if client.exist(uuid=item.uuid):
                    continue
                else:
                    client.add(item)


# OPERATORS
class SessionStartOperator(bpy.types.Operator):
    bl_idname = "session.start"
    bl_label = "start"
    bl_description = "connect to a net server"
    bl_options = {"REGISTER"}

    host: bpy.props.BoolProperty(default=False)

    @classmethod
    def poll(cls, context):
        return True

    def execute(self, context):
        global client, delayables
        settings = context.window_manager.session
        # save config
        settings.save(context)

        bpy_factory = ReplicatedDataFactory()
        supported_bl_types = []

        # init the factory with supported types
        for type in bl_types.types_to_register():
            _type = getattr(bl_types, type)
            supported_bl_types.append(_type.bl_id)

            # Retreive local replicated types settings
            type_local_config = settings.supported_datablock[_type.bl_rep_class.__name__]

            bpy_factory.register_type(
                _type.bl_class,
                _type.bl_rep_class,
                timer=type_local_config.bl_delay_refresh,
                automatic=type_local_config.auto_push)

            if type_local_config.bl_delay_apply > 0:
                delayables.append(delayable.ApplyTimer(
                    timout=type_local_config.bl_delay_apply,
                    target_type=_type.bl_rep_class))

        client = Session(factory=bpy_factory)

        if self.host:
            # Scene setup
            if settings.start_empty:
                utils.clean_scene()

            client.host(
                id=settings.username,
                address=settings.ip,
                port=settings.port,
                right_strategy=settings.right_strategy
            )
            settings.is_admin = True
        else:
            utils.clean_scene()

            client.connect(
                id=settings.username,
                address=settings.ip,
                port=settings.port
            )

        if client.state == 0:
            settings.is_admin = False
            self.report(
                {'ERROR'},
                "A session is already hosted on this address")
            return {"CANCELLED"}

        if settings.init_scene and self.host:
            init_supported_datablocks(supported_bl_types)

            for node in client.list():
                client.commit(node)

        # Init user settings
        usr = presence.User(
            username=settings.username,
            color=(settings.client_color.r,
                   settings.client_color.g,
                   settings.client_color.b,
                   1),
        )
        settings.user_uuid = client.add(usr)
        client.commit(settings.user_uuid)

        delayables.append(delayable.ClientUpdate(
            client_uuid=settings.user_uuid))

        delayables.append(delayable.DynamicRightSelectTimer())

        # Push all added values
        client.push()

        # Launch drawing module
        if settings.enable_presence:
            presence.renderer.run()

        # Register blender main thread tools
        for d in delayables:
            d.register()

        self.report(
            {'INFO'},
            "connexion on tcp://{}:{}".format(settings.ip, settings.port))
        return {"FINISHED"}


class SessionStopOperator(bpy.types.Operator):
    bl_idname = "session.stop"
    bl_label = "close"
    bl_description = "Exit current session"
    bl_options = {"REGISTER"}

    @classmethod
    def poll(cls, context):
        return True

    def execute(self, context):
        global client, delayables
        settings = context.window_manager.session
        settings.is_admin = False
        assert(client)

        client.remove(settings.user_uuid)
        client.disconnect()
        
        for d in delayables:
            try:
                d.unregister()
            except:
                continue
        presence.renderer.stop()

        return {"FINISHED"}


class SessionPropertyRemoveOperator(bpy.types.Operator):
    bl_idname = "session.remove_prop"
    bl_label = "remove"
    bl_description = "broadcast a property to connected client_instances"
    bl_options = {"REGISTER"}

    property_path: bpy.props.StringProperty(default="None")

    @classmethod
    def poll(cls, context):
        return True

    def execute(self, context):
        global client
        try:
            client.remove(self.property_path)

            return {"FINISHED"}
        except:  # NonAuthorizedOperationError:
            self.report(
                {'ERROR'},
                "Non authorized operation")
            return {"CANCELLED"}


class SessionPropertyRightOperator(bpy.types.Operator):
    bl_idname = "session.right"
    bl_label = "Change owner to"
    bl_description = "Change owner of specified datablock"
    bl_options = {"REGISTER"}

    key: bpy.props.StringProperty(default="None")

    @classmethod
    def poll(cls, context):
        return True

    def invoke(self, context, event):
        wm = context.window_manager
        return wm.invoke_props_dialog(self)

    def draw(self, context):
        layout = self.layout
        settings = context.window_manager.session

        col = layout.column()
        col.prop(settings, "clients")

    def execute(self, context):
        settings = context.window_manager.session
        global client

        if client:
            client.change_owner(self.key, settings.clients)

        return {"FINISHED"}


class SessionSnapUserOperator(bpy.types.Operator):
    bl_idname = "session.snapview"
    bl_label = "snap to user"
    bl_description = "Snap 3d view to selected user"
    bl_options = {"REGISTER"}

    target_client: bpy.props.StringProperty(default="None")

    @classmethod
    def poll(cls, context):
        return True

    def execute(self, context):
        area, region, rv3d = presence.view3d_find()
        global client

        target_client = client.get(uuid=self.target_client)
        if target_client:
            rv3d.view_location = target_client.buffer['location'][0]
            rv3d.view_distance = 30.0

            return {"FINISHED"}

        return {"CANCELLED"}


class SessionApply(bpy.types.Operator):
    bl_idname = "session.apply"
    bl_label = "apply selected block into blender"
    bl_description = "Apply selected block into blender"
    bl_options = {"REGISTER"}

    target = bpy.props.StringProperty()

    @classmethod
    def poll(cls, context):
        return True

    def execute(self, context):
        global client

        client.apply(uuid=self.target)

        return {"FINISHED"}


class SessionCommit(bpy.types.Operator):
    bl_idname = "session.commit"
    bl_label = "commit and push selected datablock to server"
    bl_description = "commit and push selected datablock to server"
    bl_options = {"REGISTER"}

    target = bpy.props.StringProperty()

    @classmethod
    def poll(cls, context):
        return True

    def execute(self, context):
        global client

        client.commit(uuid=self.target)
        client.push(uuid=self.target)
        return {"FINISHED"}


@persistent
def redresh_handler(dummy):
    """force to refresh client renderer
    """
    global client

    if client:
        user = client.get(uuid=bpy.context.window_manager.session.user_uuid)

        if hasattr(user, "pointer"):
            user.pointer.is_dirty = True


classes = (
    SessionStartOperator,
    SessionStopOperator,
    SessionPropertyRemoveOperator,
    SessionSnapUserOperator,
    SessionPropertyRightOperator,
    SessionApply,
    SessionCommit,
)


def register():
    from bpy.utils import register_class
    for cls in classes:
        register_class(cls)

    bpy.app.handlers.depsgraph_update_post.append(redresh_handler)


def unregister():
    global client

    if client and client.state == 2:
        client.disconnect()
        client = None

    from bpy.utils import unregister_class
    for cls in reversed(classes):
        unregister_class(cls)

    bpy.app.handlers.depsgraph_update_post.remove(redresh_handler)


if __name__ == "__main__":
    register()