"""ChatRoom models"""
from datetime import datetime
from typing import Optional, List
from sqlalchemy import String, Integer, Boolean, Text, DateTime, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column, relationship

from luxx.core.database import Base


def local_now():
    return datetime.now()


class ChatRoom(Base):
    """Chat Room model - like a group chat for multiple agents"""
    __tablename__ = "chat_rooms"

    id: Mapped[str] = mapped_column(String(64), primary_key=True)
    name: Mapped[str] = mapped_column(String(100), nullable=False)
    description: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    owner_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), nullable=False)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=local_now)
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=local_now, onupdate=local_now)

    # Relationships
    owner: Mapped["User"] = relationship("User", backref="chat_rooms")
    agents: Mapped[List["ChatRoomAgent"]] = relationship(
        "ChatRoomAgent", back_populates="chat_room", cascade="all, delete-orphan"
    )
    messages: Mapped[List["ChatRoomMessage"]] = relationship(
        "ChatRoomMessage", back_populates="chat_room", cascade="all, delete-orphan"
    )

    def to_dict(self, include_agents: bool = False):
        result = {
            "id": self.id,
            "name": self.name,
            "description": self.description,
            "owner_id": self.owner_id,
            "is_active": self.is_active,
            "created_at": self.created_at.isoformat() if self.created_at else None,
            "updated_at": self.updated_at.isoformat() if self.updated_at else None
        }
        if include_agents and self.agents:
            result["agents"] = [ca.to_dict() for ca in self.agents]
        return result


class Agent(Base):
    """Agent model - defines an AI agent with specific role"""
    __tablename__ = "agents"

    id: Mapped[str] = mapped_column(String(64), primary_key=True)
    name: Mapped[str] = mapped_column(String(50), nullable=False)
    role: Mapped[str] = mapped_column(String(50), nullable=False, default="helper")
    avatar: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
    system_prompt: Mapped[str] = mapped_column(Text, nullable=False, default="You are a helpful assistant.")
    provider_id: Mapped[Optional[int]] = mapped_column(Integer, ForeignKey("llm_providers.id"), nullable=True)
    model: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
    tools: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    priority: Mapped[int] = mapped_column(Integer, default=5)
    auto_response: Mapped[bool] = mapped_column(Boolean, default=True)
    mention_trigger: Mapped[bool] = mapped_column(Boolean, default=False)
    temperature: Mapped[float] = mapped_column(Text, default="0.7")
    max_tokens: Mapped[int] = mapped_column(Integer, default=2048)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=local_now)
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=local_now, onupdate=local_now)

    # Relationships
    provider: Mapped[Optional["LLMProvider"]] = relationship("LLMProvider")
    chat_rooms: Mapped[List["ChatRoomAgent"]] = relationship(
        "ChatRoomAgent", back_populates="agent", cascade="all, delete-orphan"
    )

    def to_dict(self, include_secrets: bool = False):
        import json
        result = {
            "id": self.id,
            "name": self.name,
            "role": self.role,
            "avatar": self.avatar,
            "system_prompt": self.system_prompt,
            "provider_id": self.provider_id,
            "model": self.model,
            "is_active": self.is_active,
            "priority": self.priority,
            "auto_response": self.auto_response,
            "mention_trigger": self.mention_trigger,
            "temperature": float(self.temperature) if self.temperature else 0.7,
            "max_tokens": self.max_tokens,
            "created_at": self.created_at.isoformat() if self.created_at else None,
            "updated_at": self.updated_at.isoformat() if self.updated_at else None
        }
        if self.tools:
            try:
                result["tools"] = json.loads(self.tools)
            except json.JSONDecodeError:
                result["tools"] = []
        else:
            result["tools"] = []

        if include_secrets and self.provider:
            result["provider"] = self.provider.to_dict(include_key=True)
        return result


class ChatRoomAgent(Base):
    """Association table for ChatRoom and Agent"""
    __tablename__ = "chat_room_agents"

    id: Mapped[str] = mapped_column(String(64), primary_key=True)
    chat_room_id: Mapped[str] = mapped_column(String(64), ForeignKey("chat_rooms.id"), nullable=False)
    agent_id: Mapped[str] = mapped_column(String(64), ForeignKey("agents.id"), nullable=False)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    joined_at: Mapped[datetime] = mapped_column(DateTime, default=local_now)

    # Relationships
    chat_room: Mapped["ChatRoom"] = relationship("ChatRoom", back_populates="agents")
    agent: Mapped["Agent"] = relationship("Agent", back_populates="chat_rooms")

    def to_dict(self):
        return {
            "id": self.id,
            "chat_room_id": self.chat_room_id,
            "agent_id": self.agent_id,
            "is_active": self.is_active,
            "joined_at": self.joined_at.isoformat() if self.joined_at else None,
            "agent": self.agent.to_dict() if self.agent else None
        }


class ChatRoomMessage(Base):
    """Chat Room Message model"""
    __tablename__ = "chat_room_messages"

    id: Mapped[str] = mapped_column(String(64), primary_key=True)
    room_id: Mapped[str] = mapped_column(String(64), ForeignKey("chat_rooms.id"), nullable=False)
    sender_type: Mapped[str] = mapped_column(String(16), nullable=False)
    sender_id: Mapped[str] = mapped_column(String(64), nullable=False)
    sender_name: Mapped[str] = mapped_column(String(50), nullable=False)
    content: Mapped[str] = mapped_column(Text, nullable=False, default="")
    mentions: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    parent_id: Mapped[Optional[str]] = mapped_column(String(64), nullable=True)
    token_count: Mapped[int] = mapped_column(Integer, default=0)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=local_now)

    # Relationships
    chat_room: Mapped["ChatRoom"] = relationship("ChatRoom", back_populates="messages")

    def to_dict(self):
        import json
        result = {
            "id": self.id,
            "room_id": self.room_id,
            "sender_type": self.sender_type,
            "sender_id": self.sender_id,
            "sender_name": self.sender_name,
            "content": self.content,
            "parent_id": self.parent_id,
            "token_count": self.token_count,
            "created_at": self.created_at.isoformat() if self.created_at else None
        }
        if self.mentions:
            try:
                result["mentions"] = json.loads(self.mentions)
            except json.JSONDecodeError:
                result["mentions"] = []
        else:
            result["mentions"] = []
        return result