"""SalmAlm Telegram bot."""

from __future__ import annotations

import asyncio
import re
import secrets
import time
import urllib.request
from typing import Any, Dict, Optional

from pathlib import Path
from salmalm.constants import WORKSPACE_DIR
from salmalm.security.crypto import log
from salmalm.core import audit_log, set_telegram_bot
from salmalm.core.llm import _http_post, _http_get
from salmalm.utils.chunker import EmbeddedBlockChunker, ChunkerConfig, CHANNEL_TELEGRAM
from salmalm.channels.telegram_commands import TelegramCommandsMixin


from salmalm.channels.telegram_media import TelegramMediaMixin


class TelegramBot(TelegramCommandsMixin, TelegramMediaMixin):
    def __init__(self) -> None:
        """Init  ."""
        self.token: Optional[str] = None
        self.owner_id: Optional[str] = None
        self.offset = 0
        self._running = False
        self._webhook_secret: Optional[str] = None
        self._webhook_mode = False
        # Block streaming state per chat
        self._draft_messages: Dict[str, Dict[str, Any]] = {}  # chat_id -> {msg_id, text, last_edit}
        # Typing indicator config: instant|message|never
        self.typing_mode = "instant"

    def configure(self, token: str, owner_id: str) -> None:
        """Configure the Telegram bot with token and owner chat ID."""
        self.token = token
        self.owner_id = owner_id
        self._bot_username: Optional[str] = None
        # Try to fetch bot username
        try:
            me = self._api("getMe")
            if me.get("ok") and me.get("result"):
                self._bot_username = me["result"].get("username")
        except Exception as e:  # noqa: broad-except
            log.debug(f"Suppressed: {e}")
        # Register command menu (OpenClaw-style)
        self._register_commands()

    def _api(self, method: str, data: Optional[dict] = None) -> dict:
        """Api."""
        url = f"https://api.telegram.org/bot{self.token}/{method}"
        if data:
            return _http_post(url, {"Content-Type": "application/json"}, data)
        return _http_get(url)

    def _extract_buttons(self, text: str):
        """Extract inline button markers. Returns (clean_text, buttons_list)."""
        buttons = []
        import re as _re2

        def _repl(m) -> str:
            """Repl."""
            try:
                import json as _j2

                buttons.extend(_j2.loads(m.group(1)))
            except Exception as e:  # noqa: broad-except
                log.debug(f"Suppressed: {e}")
            return ""

        clean = _re2.sub(r"<!--buttons:(\[.*?\])-->", _repl, text)
        return clean.strip(), buttons

    def _register_commands(self):
        """Register bot command menu via setMyCommands (OpenClaw-style)."""
        commands = [
            {"command": "start", "description": "Start / show status"},
            {"command": "help", "description": "Show available commands"},
            {"command": "usage", "description": "Token usage & cost report"},
            {"command": "model", "description": "Switch AI model"},
            {"command": "briefing", "description": "Daily briefing"},
            {"command": "clear", "description": "Clear conversation"},
            {"command": "compact", "description": "Compress conversation"},
            {"command": "tts", "description": "Toggle voice responses"},
            {"command": "note", "description": "Quick note"},
            {"command": "remind", "description": "Reminders"},
            {"command": "cal", "description": "Calendar"},
            {"command": "mail", "description": "Email"},
        ]
        try:
            self._api("setMyCommands", {"commands": commands})
            log.info(f"[TG] Registered {len(commands)} bot commands")
        except Exception as e:
            log.warning(f"[TG] setMyCommands failed: {e}")

    def ack_reaction(self, chat_id, message_id: int):
        """Send ack reaction (👀) while processing — OpenClaw-style."""
        return self.set_message_reaction(chat_id, message_id, "👀")

    def clear_reaction(self, chat_id, message_id: int):
        """Clear reaction after processing completes."""
        try:
            return self._api(
                "setMessageReaction",
                {"chat_id": chat_id, "message_id": message_id, "reaction": []},
            )
        except Exception as e:  # noqa: broad-except
            log.debug(f"Suppressed: {e}")

    def set_message_reaction(self, chat_id, message_id: int, emoji: str = "👍") -> dict:
        """React to a message with an emoji via setMessageReaction API."""
        try:
            return self._api(
                "setMessageReaction",
                {
                    "chat_id": chat_id,
                    "message_id": message_id,
                    "reaction": [{"type": "emoji", "emoji": emoji}],
                    "is_big": False,
                },
            )
        except Exception as e:
            log.error(f"[TG] Reaction error: {e}")
            return {}

    def _check_telegram_auth(self, chat_id, user_id: str, msg: dict) -> tuple:
        """Check multi-tenant or legacy auth. Returns (tenant_user, error_msg) or (user, None)."""
        from salmalm.features.users import user_manager

        if user_manager.multi_tenant_enabled:
            tenant = user_manager.get_user_by_telegram(str(chat_id))
            text_check = msg.get("text", "") or ""
            if not tenant and not text_check.startswith(("/register", "/start")):
                return None, (
                    "🔐 등록이 필요합니다. /register <비밀번호>로 등록하세요.\n"
                    "Registration required. Use /register <password> to sign up."
                )
            if tenant and not tenant.get("enabled", True):
                return None, "⛔ 계정이 비활성화되었습니다. 관리자에게 문의하세요. / Account disabled."
            if tenant:
                try:
                    from salmalm.features.users import QuotaExceeded

                    user_manager.check_quota(tenant["id"])
                except QuotaExceeded as e:
                    return None, f"⚠️ {e.message}"
            return tenant, None
        if user_id != self.owner_id:
            log.warning(f"[BLOCK] Unauthorized: {user_id} tried to message")
            audit_log("unauthorized", f"user_id={user_id}")
            return None, "__silent__"
        return None, None

    def _handle_send_error(self, e, chat_id, data: dict, parse_mode, reply_markup, is_last: bool) -> str:
        """Handle sendMessage errors. Returns 'continue', 'return', or '' for fallthrough."""
        err_str = str(e).lower()
        if "429" in str(e) or "flood" in err_str or "retry_after" in err_str:
            wait = self._extract_retry_after(e)
            log.warning(f"[TG] Flood wait: {wait}s for chat {chat_id}")
            time.sleep(wait)
            try:
                self._api("sendMessage", data)
            except Exception as e2:  # noqa: broad-except
                log.debug(f"Suppressed: {e2}")
            return "continue"
        if "chat not found" in err_str or "400" in str(e):
            log.warning(f"[TG] Chat not found: {chat_id}")
            return "return"
        if "403" in str(e) or "forbidden" in err_str or "kicked" in err_str:
            log.warning(f"[TG] Bot kicked/blocked: {chat_id}")
            self._cleanup_session(chat_id)
            return "return"
        if "not modified" in err_str:
            return "return"
        if parse_mode:
            data2 = {"chat_id": chat_id, "text": data["text"]}
            if reply_markup and is_last:
                data2["reply_markup"] = reply_markup
            try:
                self._api("sendMessage", data2)
            except Exception as e2:
                log.error(f"[TG] Send failed even without parse_mode: {e2}")
        else:
            log.error(f"[TG] Send failed: {e}")
        return ""

    @staticmethod
    def _build_send_data(
        chat_id, text: str, parse_mode, reply_markup, thread_id, reply_to_id, idx: int, is_last: bool
    ) -> dict:
        """Build sendMessage API data dict."""
        data = {"chat_id": chat_id, "text": text}
        if thread_id:
            data["message_thread_id"] = thread_id
        if reply_to_id and idx == 0:
            data["reply_to_message_id"] = reply_to_id
        if parse_mode:
            data["parse_mode"] = parse_mode
        if reply_markup and is_last:
            data["reply_markup"] = reply_markup
        return data

    def send_message(
        self,
        chat_id,
        text: str,
        parse_mode: Optional[str] = None,
        reply_markup: Optional[dict] = None,
        message_thread_id: Optional[int] = None,
        reply_to_message_id: Optional[int] = None,
    ):
        """Send a text message to a Telegram chat, with optional inline keyboard.

        Edge cases handled:
        - Empty messages: skip
        - Length > 4096: smart split on paragraph/code block boundaries
        - MarkdownV2 parse error: fallback to plain text
        - Flood wait (429): respect retry_after
        - Chat not found (400): log warning, skip
        - Bot kicked (403): cleanup session
        - MessageNotModified: ignore
        """
        # Empty message guard
        if not text or not text.strip():
            return

        text, btn_labels = self._extract_buttons(text)
        if not text.strip():
            return

        if btn_labels and not reply_markup:
            reply_markup = {
                "inline_keyboard": [[{"text": label, "callback_data": f"btn:{label}"[:64]} for label in btn_labels]]
            }

        # Smart split: respect paragraph boundaries and code blocks
        chunks = self._smart_split(text, max_len=4096)

        for idx, chunk in enumerate(chunks):
            if not chunk.strip():
                continue
            is_last = idx == len(chunks) - 1
            data = self._build_send_data(
                chat_id, chunk, parse_mode, reply_markup, message_thread_id, reply_to_message_id, idx, is_last
            )
            try:
                self._api("sendMessage", data)
            except Exception as e:
                action = self._handle_send_error(e, chat_id, data, parse_mode, reply_markup, is_last)
                if action == "continue":
                    continue
                if action == "return":
                    return

    def _smart_split(self, text: str, max_len: int = 4096) -> list:
        """Split text respecting paragraph boundaries and code blocks.

        Uses EmbeddedBlockChunker for code-fence-aware, smart-breakpoint splitting.
        """
        if len(text) <= max_len:
            return [text]

        config = ChunkerConfig(channel=CHANNEL_TELEGRAM, hardCap=max_len)
        chunker = EmbeddedBlockChunker(config)
        return chunker.split_for_channel(text)

    @staticmethod
    def _extract_retry_after(error) -> float:
        """Extract retry_after seconds from Telegram error."""
        try:
            err_str = str(error)
            import re as _re

            m = _re.search(r"retry.after[:\s]+(\d+)", err_str, _re.IGNORECASE)
            if m:
                return float(m.group(1))
        except Exception as e:  # noqa: broad-except
            log.debug(f"Suppressed: {e}")
        return 5.0  # Default wait

    def _cleanup_session(self, chat_id):
        """Clean up session when bot is kicked from chat."""
        session_id = f"telegram_{chat_id}"
        try:
            from salmalm.core import _sessions, _session_lock

            with _session_lock:
                if session_id in _sessions:
                    del _sessions[session_id]
            log.info(f"[TG] Session cleaned up: {session_id}")
        except Exception as e:
            log.error(f"[TG] Session cleanup error: {e}")

    def _send_photo(self, chat_id, path: Path, caption: str = ""):  # noqa: F405
        """Send a photo file to Telegram."""
        try:
            import mimetypes  # noqa: F401

            boundary = f"----SalmAlm{secrets.token_hex(8)}"
            body = b""
            # chat_id field
            body += f'--{boundary}\r\nContent-Disposition: form-data; name="chat_id"\r\n\r\n{chat_id}\r\n'.encode()
            if caption:
                body += f'--{boundary}\r\nContent-Disposition: form-data; name="caption"\r\n\r\n{caption[:1000]}\r\n'.encode()
            # photo field
            body += f'--{boundary}\r\nContent-Disposition: form-data; name="photo"; filename="{path.name}"\r\nContent-Type: image/png\r\n\r\n'.encode()
            body += path.read_bytes()
            body += f"\r\n--{boundary}--\r\n".encode()
            req = urllib.request.Request(
                f"https://api.telegram.org/bot{self.token}/sendPhoto",
                data=body,
                headers={"Content-Type": f"multipart/form-data; boundary={boundary}"},
                method="POST",
            )
            urllib.request.urlopen(req, timeout=30)
        except Exception as e:
            log.error(f"Send photo error: {e}")
            # Fallback: send as text link if file was from URL
            self.send_message(chat_id, f"📷 Image send failed: {e}\n{caption}")

    def _send_audio(self, chat_id, path: Path, caption: str = ""):  # noqa: F405
        """Send an audio file to Telegram."""
        try:
            boundary = f"----SalmAlm{secrets.token_hex(8)}"
            body = b""
            body += f'--{boundary}\r\nContent-Disposition: form-data; name="chat_id"\r\n\r\n{chat_id}\r\n'.encode()
            if caption:
                body += f'--{boundary}\r\nContent-Disposition: form-data; name="caption"\r\n\r\n{caption[:1000]}\r\n'.encode()
            body += f'--{boundary}\r\nContent-Disposition: form-data; name="voice"; filename="{path.name}"\r\nContent-Type: audio/mpeg\r\n\r\n'.encode()
            body += path.read_bytes()
            body += f"\r\n--{boundary}--\r\n".encode()
            req = urllib.request.Request(
                f"https://api.telegram.org/bot{self.token}/sendVoice",
                data=body,
                headers={"Content-Type": f"multipart/form-data; boundary={boundary}"},
                method="POST",
            )
            urllib.request.urlopen(req, timeout=30)
        except Exception as e:
            log.error(f"Send audio error: {e}")
            self.send_message(chat_id, f"🔊 Voice send failed: {e}")

    def _send_document(self, chat_id, data: bytes, filename: str, caption: str = ""):
        """Send a document (file) to Telegram."""
        try:
            boundary = f"----SalmAlm{secrets.token_hex(8)}"
            body = b""
            body += f'--{boundary}\r\nContent-Disposition: form-data; name="chat_id"\r\n\r\n{chat_id}\r\n'.encode()
            if caption:
                body += f'--{boundary}\r\nContent-Disposition: form-data; name="caption"\r\n\r\n{caption[:1000]}\r\n'.encode()
            body += f'--{boundary}\r\nContent-Disposition: form-data; name="document"; filename="{filename}"\r\nContent-Type: application/zip\r\n\r\n'.encode()
            body += data
            body += f"\r\n--{boundary}--\r\n".encode()
            req = urllib.request.Request(
                f"https://api.telegram.org/bot{self.token}/sendDocument",
                data=body,
                headers={"Content-Type": f"multipart/form-data; boundary={boundary}"},
                method="POST",
            )
            urllib.request.urlopen(req, timeout=60)
        except Exception as e:
            log.error(f"Send document error: {e}")
            self.send_message(chat_id, f"📎 Document send failed: {e}")

    def send_typing(self, chat_id) -> None:
        """Send a typing indicator to a Telegram chat."""
        try:
            self._api("sendChatAction", {"chat_id": chat_id, "action": "typing"})
        except Exception as e:  # noqa: broad-except
            log.debug(f"Suppressed: {e}")

    def _start_typing_loop(self, chat_id) -> asyncio.Task:
        """Start an async typing indicator loop that refreshes every 5 seconds.

        Returns a task that can be cancelled when the response is ready.
        """

        async def _loop():
            """Loop."""
            try:
                while True:
                    await asyncio.to_thread(self.send_typing, chat_id)
                    await asyncio.sleep(5)
            except asyncio.CancelledError:
                pass

        return asyncio.create_task(_loop())

    def edit_message(self, chat_id, message_id, text: str, parse_mode: Optional[str] = None) -> None:
        """Edit an existing Telegram message."""
        data: Dict[str, Any] = {
            "chat_id": chat_id,
            "message_id": message_id,
            "text": text[:4000],
        }
        if parse_mode:
            data["parse_mode"] = parse_mode
        try:
            self._api("editMessageText", data)
        except Exception as e:  # noqa: broad-except
            # Fallback without parse_mode
            # Fallback without parse_mode
            if parse_mode:
                data2 = {k: v for k, v in data.items() if k != "parse_mode"}
                try:
                    self._api("editMessageText", data2)
                except Exception as e:  # noqa: broad-except
                    log.debug(f"Suppressed: {e}")

    def _send_draft(self, chat_id, text: str) -> Optional[int]:
        """Send initial draft message for block streaming. Returns message_id."""
        data = {"chat_id": chat_id, "text": text[:4000]}
        try:
            resp = self._api("sendMessage", data)
            msg_id = resp.get("result", {}).get("message_id")
            if msg_id:
                self._draft_messages[str(chat_id)] = {
                    "msg_id": msg_id,
                    "text": text,
                    "last_edit": time.time(),
                }
            return msg_id
        except Exception as e:  # noqa: broad-except
            return None

    def _update_draft(self, chat_id, text: str, force: bool = False):
        """Update draft message with new text (block streaming).

        Respects minimum 2-second edit interval.
        Skips updates if inside an unclosed code block.
        """
        key = str(chat_id)
        draft = self._draft_messages.get(key)
        if not draft:
            return

        now = time.time()
        # Min 2s between edits unless forced
        if not force and (now - draft["last_edit"]) < 2.0:
            return

        # Don't edit in the middle of a code block (odd number of ```)
        fence_count = text.count("```")
        if not force and fence_count % 2 != 0:
            return

        draft["text"] = text
        draft["last_edit"] = now
        self.edit_message(chat_id, draft["msg_id"], text)

    def _finalize_draft(self, chat_id, text: str, suffix: str = ""):
        """Finalize draft message with complete text + suffix."""
        key = str(chat_id)
        draft = self._draft_messages.get(key)
        final = f"{text}{suffix}" if suffix else text
        if draft:
            self.edit_message(chat_id, draft["msg_id"], final)
            del self._draft_messages[key]
            return draft["msg_id"]
        else:
            # No draft — send as new message
            self.send_message(chat_id, final)
            return None

    # ── Webhook support ──────────────────────────────────────────

    def set_webhook(self, url: str) -> dict:
        """Set Telegram webhook. Generates a secret_token for request verification."""
        self._webhook_secret = secrets.token_hex(32)
        result = self._api(
            "setWebhook",
            {
                "url": url,
                "secret_token": self._webhook_secret,
                "allowed_updates": ["message", "callback_query"],
            },
        )
        if result.get("ok"):
            self._webhook_mode = True
            log.info(f"[NET] Telegram webhook set: {url}")
        return result

    def delete_webhook(self) -> dict:
        """Delete Telegram webhook and return to polling mode."""
        result = self._api("deleteWebhook", {"drop_pending_updates": False})
        self._webhook_mode = False
        self._webhook_secret = None
        log.info("[NET] Telegram webhook deleted, polling mode restored")
        return result

    def verify_webhook_request(self, secret_token: str) -> bool:
        """Verify the X-Telegram-Bot-Api-Secret-Token header."""
        if not self._webhook_secret:
            return False
        return secrets.compare_digest(secret_token, self._webhook_secret)

    async def handle_webhook_update(self, update: dict) -> None:
        """Process a single update received via webhook."""
        await self._handle_update(update)

    async def poll(self) -> None:
        """Long-polling loop for Telegram updates."""
        self._running = True
        log.info(f"[NET] Telegram bot started (owner: {self.owner_id})")

        while self._running:
            try:
                # Run blocking urllib in thread to not block event loop
                resp = await asyncio.to_thread(
                    self._api,
                    "getUpdates",
                    {"offset": self.offset, "timeout": 30, "allowed_updates": ["message", "callback_query"]},
                )
                for update in resp.get("result", []):
                    self.offset = update["update_id"] + 1
                    await self._handle_update(update)
            except Exception as e:
                log.error(f"Telegram poll error: {e}")
                await asyncio.sleep(5)

    def _download_file(self, file_id: str) -> tuple:
        """Download a file from Telegram. Returns (data, filename)."""
        info = self._api("getFile", {"file_id": file_id})
        file_path = info["result"]["file_path"]
        filename = file_path.split("/")[-1]
        # Sanitize filename — remove path traversal chars
        filename = re.sub(r"[/\\\.]{2,}", "_", filename)
        filename = re.sub(r"[^\w.\-]", "_", filename)
        if not filename or filename.startswith("."):
            filename = f"file_{int(time.time())}"
        url = f"https://api.telegram.org/file/bot{self.token}/{file_path}"
        req = urllib.request.Request(url)
        # BUG-CX fix: cap download to 50MB — prevents memory exhaustion on large files
        _MAX_DOWNLOAD = 50 * 1024 * 1024
        with urllib.request.urlopen(req, timeout=30) as resp:
            data = resp.read(_MAX_DOWNLOAD)
        return data, filename

    async def _handle_callback_query(self, cb: dict) -> None:
        """Handle inline button callback query."""
        cb_data = cb.get("data", "")
        cb_chat_id = cb.get("message", {}).get("chat", {}).get("id")
        cb_user_id = str(cb.get("from", {}).get("id", ""))
        try:
            self._api("answerCallbackQuery", {"callback_query_id": cb["id"]})
        except Exception as e:  # noqa: broad-except
            log.debug(f"Suppressed: {e}")
        from salmalm.features.users import user_manager as _um_cb

        _cb_allowed = False
        if _um_cb.multi_tenant_enabled:
            _cb_tenant = _um_cb.get_user_by_telegram(str(cb_chat_id))
            _cb_allowed = bool(_cb_tenant and _cb_tenant.get("enabled"))
        else:
            _cb_allowed = cb_user_id == self.owner_id
        if _cb_allowed and cb_chat_id and cb_data.startswith("btn:"):
            btn_text = cb_data[4:]
            self.send_typing(cb_chat_id)
            session_id = f"telegram_{cb_chat_id}"
            _start = time.time()
            from salmalm.core.engine import process_message
            from salmalm.core import get_session as _gs_cb

            _cb_sess = _gs_cb(session_id)
            _cb_model_ov = getattr(_cb_sess, "model_override", None)
            if _cb_model_ov == "auto":
                _cb_model_ov = None
            response = await process_message(session_id, btn_text, model_override=_cb_model_ov)
            _elapsed = time.time() - _start
            self.send_message(cb_chat_id, f"{response}\n\n⏱️ {_elapsed:.1f}s")

    async def _handle_update(self, update: dict):
        """Handle update."""
        cb = update.get("callback_query")
        if cb:
            await self._handle_callback_query(cb)
            return

        msg = update.get("message")
        if not msg:
            return

        chat_id = msg["chat"]["id"]
        user_id = str(msg["from"]["id"])
        _tg_username = msg.get("from", {}).get("username", "")  # noqa: F841
        chat_type = msg.get("chat", {}).get("type", "private")
        _message_thread_id = msg.get("message_thread_id")  # noqa: F841

        # Group chat: only respond to mentions or replies to bot
        if chat_type in ("group", "supergroup"):
            _msg_text = msg.get("text", "") or ""
            _bot_info = getattr(self, "_bot_username", None)
            _is_mention = _bot_info and f"@{_bot_info}" in _msg_text
            _is_reply_to_bot = False
            if msg.get("reply_to_message", {}).get("from", {}).get("is_bot"):
                _is_reply_to_bot = True
            # Also check entities for bot_command or mention
            for ent in msg.get("entities", []):
                if ent.get("type") == "mention":
                    mention_text = _msg_text[ent["offset"] : ent["offset"] + ent["length"]]
                    if _bot_info and mention_text.lower() == f"@{_bot_info}".lower():
                        _is_mention = True
            if not _is_mention and not _is_reply_to_bot and not _msg_text.startswith("/"):
                return  # Silent: no mention, no reply to bot

        _tenant_user, auth_err = self._check_telegram_auth(chat_id, user_id, msg)
        if auth_err:
            if auth_err != "__silent__":
                self.send_message(chat_id, auth_err)
            return

        text = msg.get("text", "") or msg.get("caption", "") or ""
        file_info = None

        text, file_info, _image_data = self._extract_media(msg)
        if file_info == "__HANDLED__":
            return  # Agent import handled inline

        # Build final message
        if file_info:
            text = f"{file_info}\n{text}" if text else file_info

        if not text:
            return

        await self._handle_update_continued(chat_id, msg, text, _image_data, _tenant_user)

    def _send_llm_response(
        self, chat_id, response: str, model_short: str, elapsed: float, draft_sent: bool, msg_id, session_obj
    ) -> None:
        """Send LLM response with media detection, draft finalization, and TTS."""
        import re as _re

        img_match = _re.search(r"uploads/[\w.-]+\.(png|jpg|jpeg|gif|webp)", response)
        audio_match = _re.search(r"uploads/[\w.-]+\.(mp3|wav|ogg)", response)
        suffix = f"\n\n🤖 {model_short} · ⏱️ {elapsed:.1f}s"
        if img_match:
            img_path = WORKSPACE_DIR / img_match.group(0)  # noqa: F405
            if img_path.exists():
                if draft_sent:
                    self._draft_messages.pop(str(chat_id), None)
                self._send_photo(chat_id, img_path, response[:1000])
            else:
                self._finalize_or_send(chat_id, response, suffix, draft_sent)
        elif audio_match:
            audio_path = WORKSPACE_DIR / audio_match.group(0)  # noqa: F405
            if audio_path.exists():
                if draft_sent:
                    self._draft_messages.pop(str(chat_id), None)
                self._send_audio(chat_id, audio_path, response[:1000])
            else:
                self._finalize_or_send(chat_id, response, suffix, draft_sent)
        else:
            if draft_sent:
                self._finalize_draft(chat_id, response, suffix)
            else:
                self.send_message(chat_id, f"{response}{suffix}", reply_to_message_id=msg_id)
        self.clear_reaction(chat_id, msg_id)
        if getattr(session_obj, "tts_enabled", False):
            try:
                self._send_tts_voice(chat_id, response, session_obj)
            except Exception as e:
                log.error(f"TTS error: {e}")

    def _finalize_or_send(self, chat_id, response: str, suffix: str, draft_sent: bool) -> None:
        """Finalize draft or send fresh message."""
        if draft_sent:
            self._finalize_draft(chat_id, response, suffix)
        else:
            self.send_message(chat_id, f"{response}{suffix}")

    def stop(self) -> None:
        """Stop the Telegram polling loop."""
        self._running = False


telegram_bot = TelegramBot()
_tg_bot = telegram_bot  # Reference for sub-agent notifications
set_telegram_bot(telegram_bot)  # Register with core accessor
