app/models/entity.py

"""
SQLAlchemy Models for Numidium
"""
from sqlalchemy import Column, String, Text, DateTime, Float, JSON, ForeignKey, Table
from sqlalchemy.orm import relationship
from datetime import datetime
import uuid

from app.core.database import Base


def generate_uuid():
    return str(uuid.uuid4())


class Entity(Base):
    """
    Entidade - qualquer coisa rastreável no sistema
    Pode ser: pessoa, organização, local, veículo, evento, documento, etc.
    """
    __tablename__ = "entities"
    
    id = Column(String(36), primary_key=True, default=generate_uuid)
    project_id = Column(String(36), ForeignKey("projects.id"), nullable=True, index=True)
    type = Column(String(50), nullable=False, index=True)  # person, organization, location, etc
    name = Column(String(255), nullable=False, index=True)
    description = Column(Text, nullable=True)
    properties = Column(JSON, default=dict)  # Dados flexíveis
    
    # Geolocalização (opcional)
    latitude = Column(Float, nullable=True)
    longitude = Column(Float, nullable=True)
    
    # Data histórica do evento/entidade (quando aconteceu, não quando foi adicionado)
    event_date = Column(DateTime, nullable=True)
    
    # Fonte do dado
    source = Column(String(100), nullable=True)  # wikipedia, newsapi, manual, etc
    source_url = Column(Text, nullable=True)
    
    # Timestamps
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # Relacionamentos
    outgoing_relationships = relationship(
        "Relationship",
        foreign_keys="Relationship.source_id",
        back_populates="source_entity"
    )
    incoming_relationships = relationship(
        "Relationship",
        foreign_keys="Relationship.target_id",
        back_populates="target_entity"
    )


class Relationship(Base):
    """
    Relacionamento entre duas entidades
    Exemplos: works_for, knows, owns, located_at, participated_in
    """
    __tablename__ = "relationships"
    
    id = Column(String(36), primary_key=True, default=generate_uuid)
    project_id = Column(String(36), ForeignKey("projects.id"), nullable=True, index=True)
    source_id = Column(String(36), ForeignKey("entities.id"), nullable=False)
    target_id = Column(String(36), ForeignKey("entities.id"), nullable=False)
    type = Column(String(50), nullable=False, index=True)  # works_for, knows, owns, etc
    properties = Column(JSON, default=dict)
    confidence = Column(Float, default=1.0)  # 0-1, quão certo estamos dessa conexão
    
    # Data histórica do relacionamento (quando aconteceu)
    event_date = Column(DateTime, nullable=True)
    
    # Fonte
    source = Column(String(100), nullable=True)
    
    # Timestamps
    created_at = Column(DateTime, default=datetime.utcnow)
    
    # Relacionamentos
    source_entity = relationship("Entity", foreign_keys=[source_id], back_populates="outgoing_relationships")
    target_entity = relationship("Entity", foreign_keys=[target_id], back_populates="incoming_relationships")


class Event(Base):
    """
    Evento - algo que aconteceu envolvendo entidades
    """
    __tablename__ = "events"
    
    id = Column(String(36), primary_key=True, default=generate_uuid)
    type = Column(String(50), nullable=False, index=True)
    title = Column(String(255), nullable=False)
    description = Column(Text, nullable=True)
    
    # Quando aconteceu
    event_date = Column(DateTime, nullable=True)
    
    # Onde aconteceu
    location_name = Column(String(255), nullable=True)
    latitude = Column(Float, nullable=True)
    longitude = Column(Float, nullable=True)
    
    # Entidades envolvidas (armazenado como JSON array de IDs)
    entity_ids = Column(JSON, default=list)
    
    # Fonte
    source = Column(String(100), nullable=True)
    source_url = Column(Text, nullable=True)
    
    # Metadados
    properties = Column(JSON, default=dict)
    
    # Timestamps
    created_at = Column(DateTime, default=datetime.utcnow)


class Document(Base):
    """
    Documento - texto/arquivo para análise
    """
    __tablename__ = "documents"
    
    id = Column(String(36), primary_key=True, default=generate_uuid)
    title = Column(String(255), nullable=False)
    content = Column(Text, nullable=True)
    summary = Column(Text, nullable=True)  # Resumo gerado por IA
    
    # Tipo de documento
    doc_type = Column(String(50), default="text")  # text, news, report, etc
    
    # Entidades mencionadas (extraídas por NLP)
    mentioned_entities = Column(JSON, default=list)
    
    # Fonte
    source = Column(String(100), nullable=True)
    source_url = Column(Text, nullable=True)
    
    # Timestamps
    published_at = Column(DateTime, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow)