from __future__ import annotations

from datetime import datetime

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

from app.core.database import Base
from app.utils.ids import prefixed_id


class ProviderUsageLog(Base):
    __tablename__ = "provider_usage_logs"

    id: Mapped[str] = mapped_column(
        String(40),
        primary_key=True,
        default=lambda: prefixed_id("pulog"),
    )
    user_id: Mapped[str | None] = mapped_column(
        String(40),
        ForeignKey("users.id"),
        index=True,
        nullable=True,
    )
    provider: Mapped[str] = mapped_column(String(80), index=True, nullable=False)
    task_type: Mapped[str] = mapped_column(String(80), index=True, nullable=False)
    request_units: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    response_units: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    estimated_cost_usd: Mapped[float] = mapped_column(Float, default=0, nullable=False)
    status: Mapped[str] = mapped_column(String(30), index=True, nullable=False)
    error_code: Mapped[str | None] = mapped_column(String(120), nullable=True)
    cache_hit: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        server_default=func.now(),
        index=True,
        nullable=False,
    )