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

from luxx.core.database import Base

# Avoid circular import at runtime
if TYPE_CHECKING:
    from luxx.models.chat import Conversation


def local_now():
    return datetime.now()


class User(Base):
    """User model"""
    __tablename__ = "users"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    username: Mapped[str] = mapped_column(String(50), unique=True, nullable=False)
    email: Mapped[Optional[str]] = mapped_column(String(120), unique=True, nullable=True)
    password_hash: Mapped[Optional[str]] = mapped_column(String(255), nullable=True)
    role: Mapped[str] = mapped_column(String(20), default="user")
    permission_level: Mapped[int] = mapped_column(Integer, default=1)
    workspace_path: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=local_now)

    # Relationships
    conversations: Mapped[List["Conversation"]] = relationship(
        "Conversation", back_populates="user", cascade="all, delete-orphan"
    )
    llm_providers: Mapped[List["LLMProvider"]] = relationship("LLMProvider", back_populates="user")
    projects: Mapped[List["Project"]] = relationship("Project", back_populates="user")

    def to_dict(self):
        return {
            "id": self.id,
            "username": self.username,
            "email": self.email,
            "role": self.role,
            "permission_level": self.permission_level,
            "workspace_path": self.workspace_path,
            "is_active": self.is_active,
            "created_at": self.created_at.isoformat() if self.created_at else None
        }


class LLMProvider(Base):
    """LLM Provider configuration model"""
    __tablename__ = "llm_providers"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    user_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), nullable=False)
    name: Mapped[str] = mapped_column(String(100), nullable=False)
    provider_type: Mapped[str] = mapped_column(String(50), nullable=False, default="openai")
    base_url: Mapped[str] = mapped_column(String(500), nullable=False)
    api_key: Mapped[str] = mapped_column(String(500), nullable=False)
    default_model: Mapped[str] = mapped_column(String(100), nullable=False, default="gpt-4")
    max_tokens: Mapped[int] = mapped_column(Integer, default=8192)
    is_default: Mapped[bool] = mapped_column(Boolean, default=False)
    enabled: 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
    user: Mapped["User"] = relationship("User", back_populates="llm_providers")

    def to_dict(self, include_key: bool = False):
        result = {
            "id": self.id,
            "user_id": self.user_id,
            "name": self.name,
            "provider_type": self.provider_type,
            "base_url": self.base_url,
            "default_model": self.default_model,
            "max_tokens": self.max_tokens,
            "is_default": self.is_default,
            "enabled": self.enabled,
            "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_key:
            result["api_key"] = self.api_key
        return result


class Project(Base):
    """Project model"""
    __tablename__ = "projects"

    id: Mapped[str] = mapped_column(String(64), primary_key=True)
    user_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), nullable=False)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[Optional[str]] = mapped_column(Text, nullable=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
    user: Mapped["User"] = relationship("User", back_populates="projects")