from enum import Enum as PyEnum

from sqlalchemy import (
    Column,
    DateTime,
    Enum,
    Float,
    ForeignKey,
    Integer,
    String,
    func,
)
from sqlalchemy.dialects.postgresql import UUID
from pydantic import BaseModel
from ._base import Base


class LetterType(PyEnum):
    UO = "UO"
    DEBRIEF = "DEBRIEF"


class Letter(Base):
    __tablename__ = "letters"
    id = Column(UUID(as_uuid=True), primary_key=True, nullable=False)
    proposal_id = Column(
        UUID(as_uuid=True),
        ForeignKey("proposals.id", ondelete="CASCADE"),
        nullable=False,
    )
    letter = Column(String, nullable=True)
    letter_type = Column(Enum(LetterType), nullable=False)
    created_at = Column(DateTime, nullable=False, default=func.now())
    updated_at = Column(
        DateTime, nullable=False, default=func.now(), onupdate=func.now()
    )