почти получилось сделать многоэкранное

app/app.py

@@ -1,34 +1,30 @@
-#from telethon import TelegramClient, events
+from telethon import TelegramClient, events
 from textual.app import App, ComposeResult
 from textual.containers import Horizontal, VerticalScroll
 from textual.widgets import Static, Footer
 from widgets.chat import Chat
 from widgets.dialog import Dialog
-from telegram.client import TelegramClientWrapper
+from textual.screen import Screen
+#from telegram.client import TelegramClientWrapper
 from tokens import api_id, api_hash
 
-class TelegramTUI(App):
-    CSS_PATH = "../tcss/style.tcss"
+class ChatScreen(Screen):
+    """Класс экрана чатов, он же основной экран приложения"""
 
-    def __init__(self):
-        super().__init__()
-        
+    def __init__(self, name = None, id = None, classes = None, telegram_client = None):
+        super().__init__(name, id, classes)
+        self.telegram_client = telegram_client
+        self.telegram_client.on(events.NewMessage())(self.update_chat_list)
 
-    async def on_mount(self) -> None:
-        self.telegram_client = TelegramClientWrapper(api_id, api_hash, self.update_chat_list)
+    def on_mount(self):
         self.chat_container = self.query_one("#main_container").query_one("#chats").query_one("#chat_container")
+
         self.limit = 100
         for i in range(self.limit):
-            chat = Chat(id=f"chat-{i + 1}")
+            chat = Chat(id=f"chat-{i + 1}", notify_func=self.notify)
             self.chat_container.mount(chat)
         #self.mount_chats(limit=25)
 
-        await self.telegram_client.connect()
-
-        await self.update_chat_list()
-
-    # TODO: скоро сюда переедет маунт чатов из функции on_mount
-    # P.S. сделано, но неудачно
     def mount_chats(self, limit: int):
         self.limit = limit
         chats_amount = len(self.chat_container.query(Chat))
@@ -48,7 +44,7 @@ class TelegramTUI(App):
             chat.username = str(dialogs[i].name)
             chat.msg = str(dialogs[i].message.message)
             chat.peer_id = dialogs[i].id
-            #self.notify("Новое сообщение")    #колхоз дебаг
+            self.notify("Новое сообщение")    #колхоз дебаг
 
     def compose(self) -> ComposeResult:
         yield Footer()
@@ -59,6 +55,31 @@ class TelegramTUI(App):
 
             yield Dialog()
 
+class AuthScreen(Screen):
+    """Это будет классом экрана логина"""
+
+    pass
+
+class TelegramTUI(App):
+    """Класс приложения"""
+
+    CSS_PATH = "../tcss/style.tcss"
+    #SCREENS = {"chats": ChatScreen}
+
+    def __init__(self):
+        super().__init__()    
+
+    async def on_mount(self) -> None:
+        self.telegram_client = TelegramClient("../user", api_id, api_hash)
+        #self.push_screen("chats")
+        chat_screen = ChatScreen(telegram_client=self.telegram_client)
+        self.install_screen(chat_screen, name="chats")
+        self.push_screen("chats")
+        self.telegram_client.on(events.NewMessage())(chat_screen.update_chat_list())
+
+        await self.telegram_client.start()
+        await self.update_chat_list()
+
     async def on_exit_app(self):
         await self.telegram_client.disconnect()
         return super()._on_exit_app()

telegram/client.py

@@ -1,6 +1,8 @@
 from telethon import TelegramClient, events, utils
 
 class TelegramClientWrapper:
+    """Обёртка для метода TelegramClient из Telethon"""
+
     def __init__(self, api_id, api_hash, message_handler):
         self.message_handler = message_handler
         self.client = TelegramClient('user', api_id, api_hash)
@@ -10,6 +12,9 @@ class TelegramClientWrapper:
         await self.message_handler()
 
     async def connect(self):
+        await self.client.connect()
+
+    async def start(self):
         await self.client.start()
 
     async def disconnect(self):

widgets/chat.py

@@ -4,15 +4,19 @@ from textual.widget import Widget
 from textual.reactive import Reactive
 
 class Chat(Widget):
+    """Класс виджета чата для панели чатов"""
+
     username = Reactive(" ", recompose=True)
     msg = Reactive(" ", recompose=True)
     peer_id = Reactive(0)
 
-    def __init__(self, name: str | None = None, id: str | None = None, classes: str | None = None, disabled: bool = False):
+    def __init__(self, name: str | None = None, notify_func = None, id: str | None = None, classes: str | None = None, disabled: bool = False):
         super().__init__(name=str(name), id=id, classes=classes, disabled=disabled)
+        self.notify = notify_func
 
     def _on_click(self):
         self.msg = str(self.peer_id)
+        self.notify("нажат чат")
 
     def compose(self):
         with Horizontal():

widgets/dialog.py

@@ -4,6 +4,8 @@ from textual.widget import Widget
 from widgets.message import Message
 
 class Dialog(Widget):
+    """Класс окна диалога"""
+    
     def __init__(self, id=None, classes=None, disabled=False):
         super().__init__(id=id, classes=classes, disabled=disabled)
 

widgets/message.py

@@ -3,6 +3,8 @@ from textual.containers import Container
 from textual.widget import Widget
 
 class Message(Widget):
+    """Класс виджета сообщений для окна диалога"""
+    
     def __init__(self, name=None, message=None, is_me=None, id=None, classes=None, disabled=False):
         super().__init__(name=name, id=id, classes=classes, disabled=disabled)
         self.message = message