import uuid
from datetime import date, datetime
from typing import Optional

from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy import Column, ForeignKey, UniqueConstraint
from sqlmodel import SQLModel, Field, Relationship


class JournalEntry(SQLModel, table=True):
    __tablename__ = "journal_entries"
    __table_args__ = (
        UniqueConstraint("user_id", "journal_date", name="unique_user_date_journal"),
    )
    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)
    user_id: uuid.UUID = Field(
        sa_column=Column(
            UUID(as_uuid=True),
            ForeignKey("users.id", ondelete="CASCADE"),
            nullable=False,
        )
    )
    title: str = Field(nullable=False)
    content: str = Field(nullable=False)
    journal_date: date = Field(nullable=False)
    created_at: datetime = Field(default_factory=datetime.now)
    updated_at: datetime = Field(
        default_factory=datetime.now,
        sa_column_kwargs={"onupdate": datetime.now},
        nullable=False,
    )
    user: Optional["Users"] = Relationship(back_populates="journal_entries")