from sqlalchemy import Column, Integer, String, Boolean, DateTime, ForeignKey, BigInteger
from datetime import datetime, timezone
from database import Base

_now = lambda: datetime.now(timezone.utc)

class APIKey(Base):
    __tablename__ = "api_keys"

    id = Column(Integer, primary_key=True, index=True)
    name = Column(String)
    key = Column(String, unique=True, index=True)
    key_prefix = Column(String)
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime(timezone=True), default=_now)
    expires_at = Column(DateTime(timezone=True), nullable=True)
    daily_tokens = Column(BigInteger, nullable=True)
    monthly_tokens = Column(BigInteger, nullable=True)
    daily_requests = Column(Integer, nullable=True)
    monthly_requests = Column(Integer, nullable=True)

class Setting(Base):
    __tablename__ = "settings"

    key = Column(String, primary_key=True)
    value = Column(String, nullable=False)

class Usage(Base):
    __tablename__ = "usage"

    id = Column(Integer, primary_key=True, index=True)
    api_key_id = Column(Integer, ForeignKey("api_keys.id"), unique=True)
    tokens_used_today = Column(BigInteger, default=0)
    tokens_used_month = Column(BigInteger, default=0)
    requests_today = Column(Integer, default=0)
    requests_month = Column(Integer, default=0)
    daily_reset_at = Column(DateTime(timezone=True), default=_now)
    monthly_reset_at = Column(DateTime(timezone=True), default=_now)