from datetime import datetime
from typing import Any, Callable, Dict

from sqlmodel import Session, select

from models.bot import BotInstance, BotMessage
from providers.runtime.base import RuntimeProvider
from services.bot_command_service import BotCommandService


class RuntimeService:
    def __init__(
        self,
        *,
        command_service: BotCommandService,
        resolve_runtime_provider: Callable[[Any, BotInstance], RuntimeProvider],
        clear_bot_sessions: Callable[[str], int],
        clear_dashboard_direct_session_file: Callable[[str], Dict[str, Any]],
        invalidate_bot_detail_cache: Callable[[str], None],
        invalidate_bot_messages_cache: Callable[[str], None],
        record_activity_event: Callable[..., None],
    ) -> None:
        self._command_service = command_service
        self._resolve_runtime_provider = resolve_runtime_provider
        self._clear_bot_sessions = clear_bot_sessions
        self._clear_dashboard_direct_session_file = clear_dashboard_direct_session_file
        self._invalidate_bot_detail_cache = invalidate_bot_detail_cache
        self._invalidate_bot_messages_cache = invalidate_bot_messages_cache
        self._record_activity_event = record_activity_event

    async def start_bot(self, *, app_state: Any, session: Session, bot: BotInstance) -> Dict[str, Any]:
        result = await self._resolve_runtime_provider(app_state, bot).start_bot(session=session, bot=bot)
        self._invalidate_bot_detail_cache(str(bot.id or ""))
        return result

    def stop_bot(self, *, app_state: Any, session: Session, bot: BotInstance) -> Dict[str, Any]:
        result = self._resolve_runtime_provider(app_state, bot).stop_bot(session=session, bot=bot)
        self._invalidate_bot_detail_cache(str(bot.id or ""))
        return result

    def send_command(
        self,
        *,
        app_state: Any,
        session: Session,
        bot_id: str,
        bot: BotInstance,
        payload: Any,
    ) -> Dict[str, Any]:
        return self._command_service.execute(
            session=session,
            bot_id=bot_id,
            bot=bot,
            payload=payload,
            runtime_provider=self._resolve_runtime_provider(app_state, bot),
            app_state=app_state,
        )

    def get_logs(self, *, app_state: Any, bot: BotInstance, tail: int = 300) -> Dict[str, Any]:
        return {
            "bot_id": bot.id,
            "logs": self._resolve_runtime_provider(app_state, bot).get_recent_logs(bot_id=bot.id, tail=tail),
        }

    def ensure_monitor(self, *, app_state: Any, bot: BotInstance) -> bool:
        return bool(self._resolve_runtime_provider(app_state, bot).ensure_monitor(bot_id=bot.id))

    def sync_edge_monitor_packets(self, *, app_state: Any, bot: BotInstance, request_id: str) -> None:
        runtime_provider = self._resolve_runtime_provider(app_state, bot)
        self._command_service.sync_edge_monitor_packets(
            runtime_provider=runtime_provider,
            bot_id=str(bot.id or "").strip(),
            request_id=str(request_id or "").strip(),
            app_state=app_state,
        )

    def clear_messages(self, *, app_state: Any, session: Session, bot: BotInstance) -> Dict[str, Any]:
        bot_id = str(bot.id or "").strip()
        rows = session.exec(select(BotMessage).where(BotMessage.bot_id == bot_id)).all()
        deleted = 0
        for row in rows:
            session.delete(row)
            deleted += 1

        cleared_sessions = self._clear_bot_sessions(bot_id)
        self._reset_running_runtime_session(app_state=app_state, bot=bot)
        bot.last_action = ""
        bot.current_state = "IDLE"
        bot.updated_at = datetime.utcnow()
        session.add(bot)
        self._record_activity_event(
            session,
            bot_id,
            "history_cleared",
            channel="system",
            detail=f"Cleared {deleted} stored messages",
            metadata={"deleted_messages": deleted, "cleared_sessions": cleared_sessions},
        )
        session.commit()
        self._invalidate_bot_detail_cache(bot_id)
        self._invalidate_bot_messages_cache(bot_id)
        return {"bot_id": bot_id, "deleted": deleted, "cleared_sessions": cleared_sessions}

    def clear_dashboard_direct_session(self, *, app_state: Any, session: Session, bot: BotInstance) -> Dict[str, Any]:
        bot_id = str(bot.id or "").strip()
        result = self._clear_dashboard_direct_session_file(bot_id)
        self._reset_running_runtime_session(app_state=app_state, bot=bot)
        bot.updated_at = datetime.utcnow()
        session.add(bot)
        self._record_activity_event(
            session,
            bot_id,
            "dashboard_session_cleared",
            channel="dashboard",
            detail="Cleared dashboard_direct session file",
            metadata={"session_file": result["path"], "previously_existed": result["existed"]},
        )
        session.commit()
        self._invalidate_bot_detail_cache(bot_id)
        return {"bot_id": bot_id, "cleared": True, "session_file": result["path"], "previously_existed": result["existed"]}

    def _reset_running_runtime_session(self, *, app_state: Any, bot: BotInstance) -> None:
        if not self._is_runtime_running(bot):
            return
        try:
            self._resolve_runtime_provider(app_state, bot).deliver_command(bot_id=str(bot.id), command="/new")
        except Exception:
            pass

    @staticmethod
    def _is_runtime_running(bot: BotInstance) -> bool:
        runtime_status = str(getattr(bot, "runtime_status", None) or getattr(bot, "docker_status", None) or "").upper()
        return runtime_status == "RUNNING"