from sqlalchemy import String, Text, Date, func
from sqlalchemy.orm import Mapped, mapped_column, relationship
from datetime import datetime, date
from typing import Optional, List
from app.database import Base


class Project(Base):
    __tablename__ = "projects"

    id: Mapped[int] = mapped_column(primary_key=True, index=True)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    status: Mapped[str] = mapped_column(String(20), default="not_started")
    color: Mapped[Optional[str]] = mapped_column(String(20), nullable=True)
    due_date: Mapped[Optional[date]] = mapped_column(Date, nullable=True)
    created_at: Mapped[datetime] = mapped_column(default=func.now())
    updated_at: Mapped[datetime] = mapped_column(default=func.now(), onupdate=func.now())

    # Relationships
    tasks: Mapped[List["ProjectTask"]] = relationship(back_populates="project", cascade="all, delete-orphan")
    todos: Mapped[List["Todo"]] = relationship(back_populates="project")