"""Base Agent class"""
import json
import logging
from typing import List, Dict, Any, AsyncGenerator
from abc import ABC

from luxx.tools.core import registry
from luxx.services.chat import chat_service

logger = logging.getLogger(__name__)


class BaseAgent(ABC):
    """Base class for all agents"""

    def __init__(
        self,
        agent_id: str,
        name: str,
        role: str,
        system_prompt: str,
        provider_id: int = None,
        model: str = None,
        tools: List[str] = None,
        temperature: float = 0.7,
        max_tokens: int = 2048,
        priority: int = 5,
        auto_response: bool = True,
        mention_trigger: bool = False,
        avatar: str = None
    ):
        self.agent_id = agent_id
        self.name = name
        self.role = role
        self.system_prompt = system_prompt
        self.provider_id = provider_id
        self.model = model
        self.tools = tools or []
        self.temperature = temperature
        self.max_tokens = max_tokens
        self.priority = priority
        self.auto_response = auto_response
        self.mention_trigger = mention_trigger
        self.avatar = avatar

    async def stream_response(
        self,
        user_message: str,
        conversation_history: List[Dict] = None,
        context: Dict = None,
        thinking_enabled: bool = False
    ) -> AsyncGenerator[Dict[str, Any], None]:
        """
        Generate streaming response for the agent.
        Reuses ChatService's core logic for consistency.

        Args:
            user_message: The user's message
            conversation_history: Previous messages in the room
            context: Additional context (workspace, user info, etc.)
            thinking_enabled: Enable reasoning chain

        Yields:
            SSE-formatted event dictionaries
        """
        logger.info(f"[Agent {self.name}] Starting stream_response, provider_id={self.provider_id}, model={self.model}")

        # Get tools if enabled
        enabled_tools = []
        if self.tools:
            for tool_name in self.tools:
                tool = registry.get(tool_name)
                if tool:
                    enabled_tools.append(tool)

        # Build messages list
        messages = []
        final_system_prompt = self._build_system_prompt(context)
        messages.append({"role": "system", "content": final_system_prompt})

        # Add conversation history (last 10 messages)
        if conversation_history:
            for msg in conversation_history[-10:]:
                role = "assistant" if msg["sender_type"] == "agent" else "user"
                content = msg["content"]
                # Handle JSON content format
                if isinstance(content, str):
                    try:
                        content_obj = json.loads(content)
                        if isinstance(content_obj, dict):
                            content = content_obj.get("text", content)
                    except json.JSONDecodeError:
                        pass
                messages.append({"role": role, "content": content})

        # Add current user message
        messages.append({"role": "user", "content": user_message})

        # Delegate to ChatService's core logic
        async for sse_str in chat_service.stream_response_for_agent(
            messages=messages,
            model=self.model,
            tools=enabled_tools if enabled_tools else None,
            temperature=self.temperature,
            max_tokens=self.max_tokens,
            thinking_enabled=thinking_enabled,
            provider_id=self.provider_id,
            workspace=context.get("workspace") if context else None,
            user_id=context.get("user_id") if context else None,
            username=context.get("username") if context else None,
            user_permission_level=context.get("user_permission_level", 1) if context else 1
        ):
            # Forward the SSE string with agent context appended
            yield sse_str

    def _build_system_prompt(self, context: Dict = None) -> str:
        """Build the final system prompt with context"""
        prompt = self.system_prompt
        if context:
            workspace = context.get("workspace", "")
            if workspace:
                prompt += f"\n\nCurrent workspace: {workspace}"
            user_name = context.get("username", "")
            if user_name:
                prompt += f"\nCurrent user: {user_name}"
        return prompt

    def to_dict(self) -> Dict[str, Any]:
        """Convert agent to dictionary"""
        return {
            "id": self.agent_id,
            "name": self.name,
            "role": self.role,
            "avatar": self.avatar,
            "system_prompt": self.system_prompt,
            "provider_id": self.provider_id,
            "model": self.model,
            "tools": self.tools,
            "priority": self.priority,
            "auto_response": self.auto_response,
            "mention_trigger": self.mention_trigger,
            "temperature": self.temperature,
            "max_tokens": self.max_tokens
        }

    @classmethod
    def from_model(cls, agent_db_model) -> "BaseAgent":
        """Create agent instance from database model"""
        import json
        tools = []
        if agent_db_model.tools:
            try:
                tools = json.loads(agent_db_model.tools)
            except json.JSONDecodeError:
                pass

        return cls(
            agent_id=agent_db_model.id,
            name=agent_db_model.name,
            role=agent_db_model.role,
            system_prompt=agent_db_model.system_prompt,
            provider_id=agent_db_model.provider_id,
            model=agent_db_model.model,
            tools=tools,
            temperature=float(agent_db_model.temperature) if agent_db_model.temperature else 0.7,
            max_tokens=agent_db_model.max_tokens or 2048,
            priority=agent_db_model.priority or 5,
            auto_response=agent_db_model.auto_response,
            mention_trigger=agent_db_model.mention_trigger,
            avatar=agent_db_model.avatar
        )