import logging
import random
import string
import time
import asyncio
import queue
from operator import itemgetter
import subprocess
import uuid
import bgl
import blf
import bpy
import os
import gpu
import mathutils
from bpy_extras import view3d_utils
from gpu_extras.batch import batch_for_shader

from . import client, ui, draw, helpers
from .libs import umsgpack

logger = logging.getLogger(__name__)

client_instance = None
client_keys = None
server = None
context = None
drawer = None
update_list = {}

SUPPORTED_DATABLOCKS = ['collections', 'meshes', 'objects',
                        'materials', 'textures', 'lights', 'cameras', 'actions', 'armatures', 'grease_pencils']
SUPPORTED_TYPES = ['Material',
                   'Texture', 'Light', 'Camera', 'Mesh', 'Grease Pencil', 'Object', 'Action', 'Armature', 'Collection', 'Scene']

# UTILITY FUNCTIONS


def clean_scene(elements=SUPPORTED_DATABLOCKS):
    for datablock in elements:
        datablock_ref = getattr(bpy.data, datablock)
        for item in datablock_ref:
            datablock_ref.remove(item)


def randomStringDigits(stringLength=6):
    """Generate a random string of letters and digits """
    lettersAndDigits = string.ascii_letters + string.digits
    return ''.join(random.choice(lettersAndDigits) for i in range(stringLength))


def randomColor():
    r = random.random()
    v = random.random()
    b = random.random()
    return [r, v, b]


def refresh_window():
    import bpy
    bpy.ops.wm.redraw_timer(type='DRAW_WIN_SWAP', iterations=1)


def upload_client_instance_position():
    global client_instance

    username = bpy.context.scene.session_settings.username
    if client_instance:

        key = "Client/{}".format(username)

        try:
            current_coords = draw.get_client_view_rect()
            client = client_instance.get(key)

            if current_coords != client[0][1]['location']:
                client[0][1]['location'] = current_coords
                client_instance.set(key, client[0][1])
        except:
            pass


def update_selected_object(context):
    global client_instance
    session = bpy.context.scene.session_settings

    username = bpy.context.scene.session_settings.username
    client_key = "Client/{}".format(username)
    client_data = client_instance.get(client_key)
    
    # Active object bounding box
    if len(context.selected_objects) > 0:
        

        for obj in context.selected_objects:
            if obj.name not in client_data[0][1]['active_objects']:
                client_data[0][1]['active_objects'] = helpers.get_selected_objects(context.scene)

                client_instance.set(client_key,client_data[0][1])
                break
    elif client_data[0][1]['active_objects']:
        client_data[0][1]['active_objects'] = []
        client_instance.set(client_key,client_data[0][1])
                

        # if session.active_object is not context.selected_objects[0] or session.active_object.is_evaluated:
        #     session.active_object = context.selected_objects[0]
        #     key = "net/objects/{}".format(client_instance.id.decode())
        #     data = {}
        #     data['color'] = [session.client_instance_color.r,
        #                      session.client_instance_color.g, session.client_instance_color.b]
        #     data['object'] = session.active_object.name
        #     client_instance.push_update(
        #         key, 'client_instanceObject', data)

            # return True
    # elif len(context.selected_objects) == 0 and session.active_object:
    #     session.active_object = None
    #     data = {}
    #     data['color'] = [session.client_instance_color.r,
    #                      session.client_instance_color.g, session.client_instance_color.b]
    #     data['object'] = None
    #     key = "net/objects/{}".format(client_instance.id.decode())
    #     client_instance.push_update(key, 'client_instanceObject', data)

    #     return True

    # return False


def init_datablocks():
    global client_instance

    for datatype in SUPPORTED_TYPES:
        for item in getattr(bpy.data, helpers.CORRESPONDANCE[datatype]):
            key = "{}/{}".format(datatype, item.name)
            print(key)
            client_instance.set(key)


def default_tick():
    bpy.ops.session.refresh()
    # global client_instance

    # if not client_instance.queue.empty():
    #     update = client_instance.queue.get()
    #     helpers.load(update[0],update[1])

    return 0.5


def draw_tick():
    # drawing
    global drawer

    drawer.draw()

    # refresh_window()
    # Upload
    upload_client_instance_position()
    return .2


def register_ticks():
    # REGISTER Updaters
    bpy.app.timers.register(draw_tick)

    bpy.app.timers.register(default_tick)


def unregister_ticks():
    # REGISTER Updaters
    global drawer
    drawer.unregister_handlers()
    bpy.app.timers.unregister(draw_tick)

    bpy.app.timers.unregister(default_tick)

# OPERATORS


class session_join(bpy.types.Operator):

    bl_idname = "session.join"
    bl_label = "join"
    bl_description = "connect to a net server"
    bl_options = {"REGISTER"}

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

    def execute(self, context):
        global client_instance, drawer

        net_settings = context.scene.session_settings
        # Scene setup
        if net_settings.session_mode == "CONNECT" and net_settings.clear_scene:
            clean_scene()

        # Session setup
        if net_settings.username == "DefaultUser":
            net_settings.username = "{}_{}".format(
                net_settings.username, randomStringDigits())

        username = str(context.scene.session_settings.username)

        if len(net_settings.ip) < 1:
            net_settings.ip = "127.0.0.1"

        client_instance = client.RCFClient()
        client_instance.connect(net_settings.username,
                                net_settings.ip, net_settings.port)

        # net_settings.is_running = True
        drawer = draw.HUD(client_instance=client_instance)

        register_ticks()
        return {"FINISHED"}


class session_refresh(bpy.types.Operator):
    bl_idname = "session.refresh"
    bl_label = "refresh"
    bl_description = "refresh client ui keys "
    bl_options = {"REGISTER"}

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

    def execute(self, context):
        global client_instance, client_keys

        client_keys = client_instance.list()
        return {"FINISHED"}


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

    property_path: bpy.props.StringProperty(default="None")
    depth: bpy.props.IntProperty(default=1)

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

    def execute(self, context):
        global client_instance

        client_instance.set(self.property_path)

        return {"FINISHED"}


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

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

    def execute(self, context):
        global client_instance

        client_instance.get("client")

        return {"FINISHED"}


class session_remove_property(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_instance

        try:
            del client_instance.property_map[self.property_path]

            return {"FINISHED"}
        except:
            return {"CANCELED"}


class session_create(bpy.types.Operator):
    bl_idname = "session.create"
    bl_label = "create"
    bl_description = "create to a net session"
    bl_options = {"REGISTER"}

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

    def execute(self, context):
        global server
        global client_instance

        server = subprocess.Popen(
            ['python', 'server.py'], shell=False, stdout=subprocess.PIPE)
        time.sleep(0.1)

        bpy.ops.session.join()

        if context.scene.session_settings.init_scene:
            init_datablocks()

        return {"FINISHED"}


class session_stop(bpy.types.Operator):
    bl_idname = "session.stop"
    bl_label = "close"
    bl_description = "stop net service"
    bl_options = {"REGISTER"}

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

    def execute(self, context):
        global server
        global client_instance, client_keys

        net_settings = context.scene.session_settings

        if server:
            server.kill()
            del server
            server = None
        if client_instance:
            client_instance.exit()
            del client_instance
            client_instance = None
            del client_keys
            client_keys = None
            net_settings.is_running = False

            unregister_ticks()
        else:
            logger.debug("No server/client_instance running.")

        return {"FINISHED"}


class session_settings(bpy.types.PropertyGroup):
    username = bpy.props.StringProperty(
        name="Username", default="user_{}".format(randomStringDigits()))
    ip = bpy.props.StringProperty(
        name="ip", description='Distant host ip', default="127.0.0.1")
    port = bpy.props.IntProperty(
        name="port", description='Distant host port', default=5555)

    add_property_depth = bpy.props.IntProperty(
        name="add_property_depth", default=1)
    buffer = bpy.props.StringProperty(name="None")
    is_running = bpy.props.BoolProperty(name="is_running", default=False)
    load_data = bpy.props.BoolProperty(name="load_data", default=True)
    init_scene = bpy.props.BoolProperty(name="load_data", default=True)
    clear_scene = bpy.props.BoolProperty(name="clear_scene", default=True)
    update_frequency = bpy.props.FloatProperty(
        name="update_frequency", default=0.008)
    active_object = bpy.props.PointerProperty(
        name="active_object", type=bpy.types.Object)
    session_mode = bpy.props.EnumProperty(
        name='session_mode',
        description='session mode',
        items={
            ('HOST', 'hosting', 'host a session'),
            ('CONNECT', 'connexion', 'connect to a session')},
        default='HOST')
    client_color = bpy.props.FloatVectorProperty(name="client_instance_color",
                                                 subtype='COLOR',
                                                 default=randomColor())


class session_snapview(bpy.types.Operator):
    bl_idname = "session.snapview"
    bl_label = "draw client_instances"
    bl_description = "Description that shows in blender tooltips"
    bl_options = {"REGISTER"}

    target_client = bpy.props.StringProperty()

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

    def execute(self, context):
        global client_instance

        area, region, rv3d = net_draw.view3d_find()

        for k, v in client_instance.property_map.items():
            if v.mtype == 'client_instance' and v.id.decode() == self.target_client_instance:
                rv3d.view_location = v.body['location'][1]
                rv3d.view_distance = 30.0
                return {"FINISHED"}

        return {"CANCELLED"}

        pass


# TODO: Rename to match official blender convention
classes = (
    session_join,
    session_refresh,
    session_add_property,
    session_get_property,
    session_stop,
    session_create,
    session_settings,
    session_remove_property,
    session_snapview,
)


def ordered(updates):
    # sorted = sorted(updates, key=lambda tup: SUPPORTED_TYPES.index(tup[1].id.bl_rna.name))
    uplist = []
    for item in updates.items():
        if item[1].id.bl_rna.name in SUPPORTED_TYPES:
            uplist.append((SUPPORTED_TYPES.index(
                item[1].id.bl_rna.name), item[1].id.bl_rna.name, item[1].id.name))

    uplist.sort(key=itemgetter(0))
    return uplist


def is_dirty(updates):
    global client_keys

    if client_keys:
        if len(client_keys) > 0:
            for u in updates:
                key = "{}/{}".format(u.id.bl_rna.name, u.id.name)

                if key not in client_keys:
                    return True

    return False


def depsgraph_update(scene):
    global client_instance

    if client_instance and client_instance.agent.is_alive():
        updates = bpy.context.depsgraph.updates

        update_selected_object(bpy.context)

        if is_dirty(updates):
            for update in ordered(updates):
                if update[2] == "Master Collection":
                    pass
                elif update[1] in SUPPORTED_TYPES:
                    client_instance.set("{}/{}".format(update[1], update[2]))

        if hasattr(bpy.context, 'selected_objects'):
            if len(bpy.context.selected_objects) > 0:
                updated_data = updates[0]
                if updated_data.id.name == bpy.context.selected_objects[0].name:
                    if updated_data.is_updated_transform or updated_data.is_updated_geometry:
                        client_instance.set(
                            "{}/{}".format(updated_data.id.bl_rna.name, updated_data.id.name))


def register():
    from bpy.utils import register_class
    for cls in classes:
        register_class(cls)
    bpy.types.ID.is_dirty = bpy.props.BoolProperty(default=False)
    bpy.types.Scene.session_settings = bpy.props.PointerProperty(
        type=session_settings)
    bpy.app.handlers.depsgraph_update_post.append(depsgraph_update)


def unregister():
    global server
    global client_instance, client_keys

    try:
        bpy.app.handlers.depsgraph_update_post.remove(depsgraph_update)
    except:
        pass

    if server:
        server.kill()
        server = None
        del server

    if client_instance:
        client_instance.exit()
        client_instance = None
        del client_instance
        del client_keys

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

    del bpy.types.Scene.session_settings
    del bpy.types.ID.is_dirty


if __name__ == "__main__":
    register()