from sqlalchemy import create_engine, Column, Integer, String, DateTime, Text, Boolean, ForeignKey, JSON
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker, relationship
from datetime import datetime
import uuid

Base = declarative_base()

class User(Base):
    __tablename__ = "users"
    
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    email = Column(String, unique=True, nullable=False, index=True)
    username = Column(String, unique=True, nullable=False, index=True)
    hashed_password = Column(String, nullable=False)
    is_active = Column(Boolean, default=True)
    is_verified = Column(Boolean, default=False)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # Relationships
    content_items = relationship("ContentItem", back_populates="owner")
    scheduled_posts = relationship("ScheduledPost", back_populates="owner")

class ContentItem(Base):
    __tablename__ = "content_items"
    
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    owner_id = Column(String, ForeignKey("users.id"), nullable=False)
    title = Column(String, nullable=False)
    content_type = Column(String, nullable=False)  # blog, social, video_script, etc.
    original_prompt = Column(Text)
    generated_content = Column(Text)
    platform_specific_variants = Column(JSON)  # Different versions for different platforms
    tags = Column(JSON)  # List of tags
    status = Column(String, default="draft")  # draft, published, archived
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # Relationships
    owner = relationship("User", back_populates="content_items")
    scheduled_posts = relationship("ScheduledPost", back_populates="content_item")

class ScheduledPost(Base):
    __tablename__ = "scheduled_posts"
    
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    owner_id = Column(String, ForeignKey("users.id"), nullable=False)
    content_item_id = Column(String, ForeignKey("content_items.id"), nullable=False)
    platform = Column(String, nullable=False)  # twitter, instagram, youtube, etc.
    scheduled_time = Column(DateTime, nullable=False)
    status = Column(String, default="scheduled")  # scheduled, published, failed
    platform_metadata = Column(JSON)  # Platform-specific metadata
    published_at = Column(DateTime)
    created_at = Column(DateTime, default=datetime.utcnow)
    
    # Relationships
    owner = relationship("User", back_populates="scheduled_posts")
    content_item = relationship("ContentItem", back_populates="scheduled_posts")

class AIModelConfig(Base):
    __tablename__ = "ai_model_configs"
    
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    model_name = Column(String, nullable=False)
    model_type = Column(String, nullable=False)  # text_generation, image_generation, embedding
    provider = Column(String, nullable=False)  # local, api
    model_path = Column(String)  # Path for local models
    api_endpoint = Column(String)  # Endpoint for API models
    is_active = Column(Boolean, default=True)
    config_params = Column(JSON)  # Model-specific parameters
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

class PlatformCredential(Base):
    __tablename__ = "platform_credentials"
    
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    user_id = Column(String, ForeignKey("users.id"), nullable=False)
    platform = Column(String, nullable=False)  # twitter, instagram, youtube, etc.
    encrypted_credential = Column(String, nullable=False)  # Encrypted OAuth tokens
    scopes = Column(JSON)  # Granted permissions
    expires_at = Column(DateTime)
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    user = relationship("User")

# Database setup
DATABASE_URL = "sqlite:///./auranexus.db"
engine = create_engine(DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

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