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 msgpack

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

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

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

client = None
delayables = []
ui_context = None


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
            )

        time.sleep(1)
        
        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,owner=settings.username)
        client.commit(settings.user_uuid)

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

        delayables.append(delayable.DynamicRightSelectTimer())

        # Push all added values
        client.push_all()

        # 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(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(self.target)
        return {"FINISHED"}


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


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

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)

if __name__ == "__main__":
    register()