from datetime import datetime, timezone
from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, JSON
from sqlalchemy.orm import relationship
from app.db.base import Base

class VisitorLog(Base):
    __tablename__ = "visitor_logs"

    id = Column(Integer, primary_key=True, autoincrement=True)
    session_id = Column(String(50), nullable=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id", ondelete="SET NULL"), nullable=True)
    
    ip_address = Column(String(50), nullable=True)
    user_agent = Column(Text, nullable=True)
    browser = Column(String(100), nullable=True)
    os = Column(String(100), nullable=True)
    device_type = Column(String(50), nullable=True)
    
    # Location data (JSON string or dict depending on DB)
    location_data = Column(JSON, nullable=True)
    
    # Extra metadata (screen resolution, language, etc.)
    client_metadata = Column(JSON, nullable=True)
    
    first_seen = Column(DateTime, default=lambda: datetime.now(timezone.utc), nullable=False)
    last_seen = Column(DateTime, default=lambda: datetime.now(timezone.utc), nullable=False)
    
    events = relationship("AnalyticsEvent", back_populates="visitor", cascade="all, delete-orphan")
    user = relationship("User")

class AnalyticsEvent(Base):
    __tablename__ = "analytics_events"

    id = Column(Integer, primary_key=True, autoincrement=True)
    visitor_id = Column(Integer, ForeignKey("visitor_logs.id", ondelete="CASCADE"), nullable=False)
    
    event_type = Column(String(50), nullable=False, index=True) # PAGE_VIEW, ADD_TO_CART, SEARCH, etc.
    page_url = Column(Text, nullable=True)
    page_title = Column(Text, nullable=True)
    
    # Event data (e.g. {product_id: 123} for ADD_TO_CART)
    event_data = Column(JSON, nullable=True)
    
    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), nullable=False)
    
    visitor = relationship("VisitorLog", back_populates="events")