from datetime import datetime
from typing import Optional

from sqlalchemy import String, DateTime, Boolean, ForeignKey, func
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy import JSON

from app.database import Base


class View(Base):
    __tablename__ = "views"

    id: Mapped[int] = mapped_column(primary_key=True)
    table_id: Mapped[int] = mapped_column(
        ForeignKey("tables.id", ondelete="CASCADE"), nullable=False, index=True
    )
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    type: Mapped[str] = mapped_column(String(50), default="grid")  # grid, gallery, form
    config: Mapped[Optional[dict]] = mapped_column(
        JSON, nullable=True
    )  # filter, sort, columns
    is_default: Mapped[bool] = mapped_column(Boolean, default=False)
    created_by: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=func.now())

    # Relationships
    table = relationship("Table", back_populates="views")
    created_by_user = relationship("User", back_populates="views")

    def __repr__(self):
        return f"<View(id={self.id}, name={self.name}, type={self.type})>"