# Python imports
import os
import uuid
import pickle

# Lib imports
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import GLib

# Application imports
from .dynamic_header_widget import DynamicHeaderWidget



class DynamicWidgetException(Exception):
    ...


class DynamicWidget(Gtk.Box):
    def __init__(self, move_callback, path = None, x = None, y = None):
        super(DynamicWidget, self).__init__()

        self.uuid           = str(uuid.uuid4())
        self._header_widget = DynamicHeaderWidget(move_callback, x, y)
        self._body_widget   = None
        self.save_needed    = False
        self.is_not_stop_watcher = True
        self.is_self_destroyed   = False

        self._setup_styling()
        self._setup_signals()
        self._subscribe_to_events()

        self._load_widgets() if not path else self.load_from_path(path)
        self.show_all()

        GLib.timeout_add(5000, self._save_watcher, GLib.PRIORITY_LOW)

    def _save_watcher(self, widget = None, eve = None):
        if self.save_needed:
            self.save()
            self.save_needed = False

        return self.is_not_stop_watcher # NOTE: Must be true to continue idle timeout calls

    def _setup_styling(self):
        self.set_orientation(1)
        self.set_size_request(256, 45)
        ctx = self.get_style_context()
        ctx.add_class("dynamic-widget")

    def _setup_signals(self):
        ...

    def _subscribe_to_events(self):
        ...

    def _load_widgets(self):
        try:
            self._body_widget = event_system.emit_and_await("get_widget_type")
            if not self._body_widget:
                raise Exception("No widget detected... Will not insert anything.")

            self.add(self._header_widget)
            self.add(self._body_widget)
        except DynamicWidgetException as e:
            logger.debug(e)
            raise Exception("No widget loaded!")

    def get_header(self):
        return self._header_widget

    def get_body(self):
        return self._body_widget

    def load_from_path(self, path):
        with open(path, "rb") as f:
            save_collection = pickle.load(f)
            event_system.emit("set_widget_type", save_collection["widget_type"])

            self._load_widgets()
            self._load_collection_data(save_collection)

    def _load_collection_data(self, save_collection):
        self.uuid = save_collection["uuid"]
        self._header_widget._current_w = save_collection["w"]
        self._header_widget._current_h = save_collection["h"]
        self._header_widget._current_x = save_collection["x"]
        self._header_widget._current_y = save_collection["y"]
        self._header_widget.set_size_request(self._header_widget._current_w, self._header_widget._current_h)

        self._body_widget.set_saveable_data(save_collection)
        self._body_widget.load_saveable_data()

    def delete(self):
        path = f"{settings.get_active_page()}{self.uuid}"
        logger.debug(f"Deleteing: {path}")

        try:
            if os.path.exists(path):
                if os.path.isfile(path):
                    os.remove(path)
        except Exception as e:
            logger.debug(f"Could not delete: {path}\n{e}")
            return

        self.is_self_destroyed   = True
        self.is_not_stop_watcher = False
        self._header_widget.destroy()
        self._body_widget.destroy()
        self.destroy()

    def save(self):
        if not self.is_self_destroyed:
            save_collection         = self._body_widget.get_saveable_data()
            save_collection["uuid"] = self.uuid
            save_collection["w"]    = self._header_widget._current_w
            save_collection["h"]    = self._header_widget._current_h
            save_collection["x"]    = self._header_widget._current_x
            save_collection["y"]    = self._header_widget._current_y

            path = f"{settings.get_active_page()}{self.uuid}"
            logger.debug(f"Saving: {path}")
            with open(path, "wb") as f:
                pickle.dump(save_collection, f, protocol = pickle.HIGHEST_PROTOCOL, fix_imports = True, buffer_callback = None)