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from sqlalchemy import Column, Integer, String, Boolean, Text, DateTime, create_engine, UniqueConstraint
from sqlalchemy.orm import declarative_base, sessionmaker
from datetime import datetime
import json
import os

Base = declarative_base()

class ConfigItem(Base):
    __tablename__ = 'configs'
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    key = Column(String(255), unique=True, nullable=False, index=True)
    value = Column(Text, nullable=False) # JSON string
    type = Column(String(50), nullable=False) # string, int, float, bool, json
    group_name = Column(String(50), nullable=False, index=True) # api, model, data, evaluation
    description = Column(Text)
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

class SensitiveWord(Base):
    __tablename__ = 'sensitive_words'
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    word = Column(String(255), nullable=False, index=True)
    category = Column(String(50), nullable=False, index=True)
    subcategory = Column(String(50))
    severity = Column(String(20), default='medium')
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    __table_args__ = (
        UniqueConstraint('word', 'category', 'subcategory', name='uix_word_cat_sub'),
    )

class WhitelistItem(Base):
    __tablename__ = 'whitelist'
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    word = Column(String(255), unique=True, nullable=False, index=True)
    category = Column(String(50), default='general')
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

class ApiKey(Base):
    __tablename__ = 'api_keys'
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    access_key = Column(String(64), unique=True, nullable=False, index=True)
    secret_key = Column(String(128), nullable=False) # Should be hashed in production, but plaintext for demo HMAC
    name = Column(String(100), nullable=False) # e.g. "Admin Dashboard", "N8N Workflow"
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    expires_at = Column(DateTime, nullable=True) # None means never expires

class TaskQueue(Base):
    __tablename__ = 'task_queue'
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    task_id = Column(String(64), unique=True, nullable=False, index=True)
    queue_name = Column(String(50), nullable=False, index=True)
    payload = Column(Text, nullable=False) # JSON
    status = Column(String(20), default='queued', index=True) # queued, processing, completed, failed
    result = Column(Text, nullable=True) # JSON result or error
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

# Database Setup
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
DB_DIR = os.path.join(BASE_DIR, "data")
if not os.path.exists(DB_DIR):
    os.makedirs(DB_DIR)
    
DB_PATH = os.path.join(DB_DIR, "config.db")
SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_PATH}"

engine = create_engine(
    SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

def init_db():
    Base.metadata.create_all(bind=engine)