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from sqlalchemy import Column, String, Integer, DateTime, Float, Boolean, Text, ForeignKey, Index, UniqueConstraint, CheckConstraint
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship
from datetime import datetime
import uuid

Base = declarative_base()


class Tribunal(Base):
    """Tabela de Tribunais."""
    __tablename__ = 'tribunais'
    
    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    nome = Column(String(255), nullable=False, unique=True, index=True)
    sigla = Column(String(10), nullable=False, unique=True)
    uf = Column(String(2), nullable=False)
    tipo = Column(String(50), nullable=False)
    url_base = Column(String(500))
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    acordaos = relationship('Acordao', back_populates='tribunal', cascade='all, delete-orphan')
    
    __table_args__ = (
        Index('idx_tribunal_sigla_uf', 'sigla', 'uf'),
    )


class Acordao(Base):
    """Tabela de Acórdãos."""
    __tablename__ = 'acordaos'
    
    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    tribunal_id = Column(String(36), ForeignKey('tribunais.id'), nullable=False, index=True)
    numero = Column(String(50), nullable=False)
    ano = Column(Integer, nullable=False, index=True)
    data_julgamento = Column(DateTime, nullable=False, index=True)
    ementa = Column(Text, nullable=False)
    relator = Column(String(255))
    orgao_julgador = Column(String(255))
    url_original = Column(String(500), unique=True)
    hash_conteudo = Column(String(64), nullable=False, unique=True, index=True)
    status_processamento = Column(String(20), default='pendente', index=True)
    created_at = Column(DateTime, default=datetime.utcnow, index=True)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    tribunal = relationship('Tribunal', back_populates='acordaos')
    decisoes = relationship('Decisao', back_populates='acordao', cascade='all, delete-orphan')
    palavras_chave = relationship('PalavraChave', secondary='acordao_palavras_chave', back_populates='acordaos')
    embeddings = relationship('Embedding', back_populates='acordao', cascade='all, delete-orphan')
    
    __table_args__ = (
        UniqueConstraint('tribunal_id', 'numero', 'ano', name='uq_acordao_tribunal_numero_ano'),
        Index('idx_acordao_data_tribunal', 'data_julgamento', 'tribunal_id'),
        Index('idx_acordao_status', 'status_processamento'),
    )


class Decisao(Base):
    """Tabela de Decisões extraídas dos acórdãos."""
    __tablename__ = 'decisoes'
    
    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    acordao_id = Column(String(36), ForeignKey('acordaos.id'), nullable=False, index=True)
    tipo = Column(String(50), nullable=False)
    texto = Column(Text, nullable=False)
    confianca = Column(Float, default=0.0)
    created_at = Column(DateTime, default=datetime.utcnow)
    
    acordao = relationship('Acordao', back_populates='decisoes')
    
    __table_args__ = (
        Index('idx_decisao_acordo_tipo', 'acordao_id', 'tipo'),
    )


class PalavraChave(Base):
    """Tabela de Palavras-chave para classificação."""
    __tablename__ = 'palavras_chave'
    
    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    termo = Column(String(255), nullable=False, unique=True, index=True)
    categoria = Column(String(100), nullable=False, index=True)
    frequencia = Column(Integer, default=0)
    ativo = Column(Boolean, default=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    
    acordaos = relationship('Acordao', secondary='acordao_palavras_chave', back_populates='palavras_chave')


class AcordaoPalavraChave(Base):
    """Tabela de associação Acórdão-PalavraChave."""
    __tablename__ = 'acordao_palavras_chave'
    
    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    acordao_id = Column(String(36), ForeignKey('acordaos.id'), nullable=False, index=True)
    palavra_chave_id = Column(String(36), ForeignKey('palavras_chave.id'), nullable=False, index=True)
    relevancia = Column(Float, default=0.0)
    created_at = Column(DateTime, default=datetime.utcnow)
    
    __table_args__ = (
        UniqueConstraint('acordao_id', 'palavra_chave_id', name='uq_acordao_palavra'),
    )


class Embedding(Base):
    """Tabela de Embeddings (representação vetorial)."""
    __tablename__ = 'embeddings'
    
    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    acordao_id = Column(String(36), ForeignKey('acordaos.id'), nullable=False, index=True)
    modelo = Column(String(100), nullable=False)
    tipo = Column(String(50), nullable=False)
    vetor = Column(Text, nullable=False)
    dimensoes = Column(Integer)
    created_at = Column(DateTime, default=datetime.utcnow)
    
    acordao = relationship('Acordao', back_populates='embeddings')
    
    __table_args__ = (
        Index('idx_embedding_acordo_modelo', 'acordao_id', 'modelo'),
    )


class Usuario(Base):
    """Tabela de Usuários do sistema."""
    __tablename__ = 'usuarios'
    
    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    email = Column(String(255), nullable=False, unique=True, index=True)
    nome = Column(String(255), nullable=False)
    senha_hash = Column(String(255), nullable=False)
    ativo = Column(Boolean, default=True)
    role = Column(String(50), default='user')
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    buscas = relationship('Busca', back_populates='usuario', cascade='all, delete-orphan')


class Busca(Base):
    """Tabela de Buscas realizadas pelos usuários."""
    __tablename__ = 'buscas'
    
    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    usuario_id = Column(String(36), ForeignKey('usuarios.id'), nullable=False, index=True)
    termo = Column(String(500), nullable=False)
    filtros = Column(Text)
    resultado_count = Column(Integer, default=0)
    tempo_execucao = Column(Float)
    created_at = Column(DateTime, default=datetime.utcnow, index=True)
    
    usuario = relationship('Usuario', back_populates='buscas')
    
    __table_args__ = (
        Index('idx_busca_usuario_data', 'usuario_id', 'created_at'),
    )


class ProcessoJudicial(Base):
    """Tabela de Processos Judiciais relacionados."""
    __tablename__ = 'processos_judiciais'
    
    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    numero_processo = Column(String(50), nullable=False, unique=True, index=True)
    tribunal_id = Column(String(36), ForeignKey('tribunais.id'), nullable=False)
    data_distribuicao = Column(DateTime, nullable=False)
    status = Column(String(50), default='ativo')
    parte_ativa = Column(String(255))
    parte_passiva = Column(String(255))
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)


class AuditoriaAcesso(Base):
    """Tabela de auditoria de acessos."""
    __tablename__ = 'auditoria_acessos'
    
    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    usuario_id = Column(String(36), ForeignKey('usuarios.id'), nullable=True)
    acao = Column(String(100), nullable=False)
    recurso = Column(String(255))
    ip_address = Column(String(45))
    status = Column(String(20))
    created_at = Column(DateTime, default=datetime.utcnow, index=True)
    
    __table_args__ = (
        Index('idx_auditoria_usuario_data', 'usuario_id', 'created_at'),
    )