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import uuid
from sqlalchemy import Column, String, Boolean, DateTime, func, Index
from sqlalchemy.dialects.postgresql import UUID

from auth.database import Base


# =========================================================
# USERS TABLE (CORE AUTH ENTITY)
# =========================================================
class User(Base):
    __tablename__ = "users"

    # -----------------------------
    # Primary Key (UUID for Supabase compatibility)
    # -----------------------------
    id = Column(
        UUID(as_uuid=True),
        primary_key=True,
        default=uuid.uuid4,
        nullable=False,
    )

    # -----------------------------
    # Identity Fields
    # -----------------------------
    email = Column(String(255), unique=True, nullable=False, index=True)
    username = Column(String(100), unique=True, nullable=True, index=True)

    # -----------------------------
    # Security Fields
    # NOTE: stores hashed password only (never plaintext)
    # -----------------------------
    hashed_password = Column(String(255), nullable=False)

    # -----------------------------
    # Account State
    # -----------------------------
    is_active = Column(Boolean, default=True, nullable=False)
    is_verified = Column(Boolean, default=False, nullable=False)

    # -----------------------------
    # Audit Fields
    # -----------------------------
    created_at = Column(
        DateTime(timezone=True),
        server_default=func.now(),
        nullable=False,
    )

    updated_at = Column(
        DateTime(timezone=True),
        server_default=func.now(),
        onupdate=func.now(),
        nullable=False,
    )


# =========================================================
# OPTIONAL: API KEY TABLE (FOR AUTOMATION / N8N / WORKFLOWS)
# =========================================================
class ApiKey(Base):
    __tablename__ = "api_keys"

    id = Column(
        UUID(as_uuid=True),
        primary_key=True,
        default=uuid.uuid4,
        nullable=False,
    )

    user_id = Column(
        UUID(as_uuid=True),
        nullable=False,
        index=True,
    )

    key_hash = Column(String(255), nullable=False, unique=True)

    name = Column(String(120), nullable=True)

    is_active = Column(Boolean, default=True, nullable=False)

    created_at = Column(
        DateTime(timezone=True),
        server_default=func.now(),
        nullable=False,
    )


# =========================================================
# INDEXES (PERFORMANCE OPTIMIZATION)
# =========================================================
Index("idx_users_email", User.email)
Index("idx_users_username", User.username)
Index("idx_api_keys_user_id", ApiKey.user_id)