import uuid
from datetime import datetime, timezone

from sqlalchemy import DateTime, Float, Integer, String
from sqlalchemy.orm import Mapped, mapped_column

from app.db import Base


class User(Base):
    __tablename__ = "users"

    id: Mapped[uuid.UUID] = mapped_column(primary_key=True, default=uuid.uuid4)
    username: Mapped[str] = mapped_column(String(32), unique=True, index=True)
    password_hash: Mapped[str] = mapped_column(String(255))
    email: Mapped[str | None] = mapped_column(String(255), nullable=True)
    essence: Mapped[int] = mapped_column(Integer, default=0)
    # Workstream B (character-depth-ghost-log spec): hidden per-user score,
    # nudged by judgment correctness, clamped to [-1.0, 1.0] everywhere it's
    # written (see app.judgment.clamp_favor). Read back as a small bias on
    # new entities' trait rolls at mint time (app.judgment.apply_favor_bias).
    favor: Mapped[float] = mapped_column(Float, default=0.0)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )