"""AI Proactive Participant Handler — bridges the kommunikation plugin with the proactive AI.

When a message is received in a conversation that includes the 'ai_proactive' participant,
this handler generates a proactive suggestion based on the message context.
"""

from __future__ import annotations

import logging
import uuid
from typing import Any

from app.core.db import create_db_session
from app.plugins.builtins.kommunikation.participant_registry import ParticipantHandler

logger = logging.getLogger(__name__)


class AIProactiveParticipantHandler(ParticipantHandler):
    """Handles proactive AI suggestions as a participant in kommunikation conversations."""

    def __init__(self, container: Any) -> None:
        self._container = container

    async def on_message_received(
        self,
        conversation_id: Any,
        message: dict[str, Any],
        conversation: dict[str, Any],
        mentions: list[str],
        context: dict[str, Any],
    ) -> list[dict[str, Any]] | None:
        """Generate a proactive suggestion when ai_proactive is a participant.

        Checks if 'ai_proactive' is in the conversation participants as a
        participant_type. If yes, generates a suggestion based on the message.

        Returns a list with one message dict containing the suggestion as
        an action card, or None on error.
        """
        # Check if 'ai_proactive' is a participant in this conversation
        participants = conversation.get("participants", [])
        ai_proactive_is_participant = any(
            p.get("participant_type") == "ai_proactive" for p in participants
        )
        if not ai_proactive_is_participant:
            return None

        # Don't respond to our own messages
        if message.get("sender_type") == "ai_proactive":
            return None

        # Get tenant_id and user_id from context
        tenant_id_str = context.get("tenant_id") or message.get("tenant_id")
        user_id_str = context.get("user_id")

        if not tenant_id_str:
            logger.warning("AIProactiveParticipantHandler: missing tenant_id in context")
            return None

        try:
            tenant_id = uuid.UUID(str(tenant_id_str))
            user_id = uuid.UUID(str(user_id_str)) if user_id_str else None
        except (ValueError, TypeError):
            logger.warning("AIProactiveParticipantHandler: invalid UUID in context")
            return None

        # Generate suggestion using the existing generate_suggestion function
        try:
            from app.plugins.builtins.ai_proactive.services import (
                generate_suggestion,
                get_user_settings,
            )

            async with create_db_session(tenant_id) as db:
                # Get user settings for the proactive AI
                if user_id:
                    settings = await get_user_settings(db, tenant_id, user_id)
                else:
                    # Create minimal default settings if no user_id
                    from app.plugins.builtins.ai_proactive.models import ProactiveSettings

                    settings = ProactiveSettings(
                        tenant_id=tenant_id,
                        user_id=user_id or uuid.uuid4(),
                        enabled=True,
                        suggestion_categories=["mail", "tasks", "contacts", "companies", "insights"],
                        confidence_threshold=0.5,
                        rate_limit_seconds=10,
                        model="ollama/deepseek-v4-flash",
                    )

                if not settings.enabled:
                    return None

                # Build context data from the message
                context_data: dict[str, Any] = {
                    "entity_type": "message",
                    "message": message.get("content", ""),
                    "conversation_id": str(conversation_id),
                    "sender_type": message.get("sender_type", "user"),
                }

                # Generate suggestion via LLM
                suggestion = await generate_suggestion(
                    context_data, settings, db=db, tenant_id=tenant_id
                )

                if not suggestion:
                    return None

                # Build the response message with an action card block
                suggestion_text = suggestion.get("content", "")
                title = suggestion.get("title", "KI Vorschlag")
                suggestion_type = suggestion.get("suggestion_type", "info")
                confidence = suggestion.get("confidence", 0.5)
                actions = suggestion.get("actions", [])

                return [
                    {
                        "content": suggestion_text,
                        "content_format": "markdown",
                        "blocks": [
                            {
                                "block_type": "action_card",
                                "block_data": {
                                    "title": title,
                                    "suggestion_type": suggestion_type,
                                    "confidence": confidence,
                                    "actions": actions,
                                },
                            }
                        ],
                    }
                ]

        except Exception:
            logger.exception("AIProactiveParticipantHandler: error generating suggestion")
            return None

    async def handle_event(self, payload: dict[str, Any]) -> None:
        """Handle a message.received event from the event bus.

        Extracts conversation_id from the payload, loads the conversation,
        and calls on_message_received. If a response is generated, sends it
        back to the conversation.
        """
        conversation_id_str = payload.get("conversation_id")
        tenant_id_str = payload.get("tenant_id")
        message_content = payload.get("content", "")
        message_id = payload.get("message_id")
        sender_type = payload.get("sender_type", "user")
        sender_id_str = payload.get("sender_id")

        if not conversation_id_str or not tenant_id_str:
            logger.warning("AIProactiveParticipantHandler.handle_event: missing conversation_id or tenant_id")
            return

        try:
            tenant_id = uuid.UUID(str(tenant_id_str))
            conversation_id = uuid.UUID(str(conversation_id_str))
        except (ValueError, TypeError):
            logger.warning("AIProactiveParticipantHandler.handle_event: invalid UUID in payload")
            return

        # Build the message dict
        message: dict[str, Any] = {
            "id": message_id,
            "content": message_content,
            "sender_type": sender_type,
            "tenant_id": tenant_id_str,
        }

        # Load conversation
        try:
            from app.plugins.builtins.kommunikation.services import get_conversation

            async with create_db_session(tenant_id) as db:
                if not sender_id_str:
                    logger.warning("AIProactiveParticipantHandler.handle_event: missing sender_id")
                    return

                user_id = uuid.UUID(str(sender_id_str))
                conversation = await get_conversation(db, tenant_id, conversation_id, user_id)

                if not conversation:
                    logger.warning("AIProactiveParticipantHandler.handle_event: conversation not found")
                    return

                # Parse mentions from message content
                from app.plugins.builtins.kommunikation.services import parse_mentions

                mentions = parse_mentions(message_content)

                context: dict[str, Any] = {
                    "tenant_id": tenant_id_str,
                    "user_id": sender_id_str,
                }

                # Call on_message_received
                response_messages = await self.on_message_received(
                    conversation_id, message, conversation, mentions, context
                )

                # If we got a response, send it to the conversation
                if response_messages:
                    from app.plugins.builtins.kommunikation.services import send_message

                    for resp_msg in response_messages:
                        await send_message(
                            db=db,
                            tenant_id=tenant_id,
                            conversation_id=conversation_id,
                            sender_id=None,
                            sender_type="ai_proactive",
                            content=resp_msg.get("content", ""),
                            content_format=resp_msg.get("content_format", "text"),
                            blocks=resp_msg.get("blocks"),
                        )

                    await db.commit()

        except Exception:
            logger.exception("AIProactiveParticipantHandler.handle_event: error processing event")

    def get_participant_info(self) -> dict[str, Any]:
        """Return metadata about this participant."""
        return {
            "display_name": "Live KI",
            "capabilities": ["proactive", "context_aware", "heartbeat"],
            "description": "Proaktive KI mit Kontextbewusstsein und Heartbeat",
        }