"""
SQLAlchemy models for TOM — Technisch-Organisatorische Massnahmen (Art. 32 DSGVO).

Tables:
- compliance_tom_state: Full TOM-Generator state per tenant (JSONB blob)
- compliance_tom_measures: Individual TOM measures (flat, queryable)
"""

import uuid
from datetime import datetime

from sqlalchemy import (
    Column, String, Text, Integer, DateTime, JSON, Index
)
from sqlalchemy.dialects.postgresql import UUID

from classroom_engine.database import Base


class TOMStateDB(Base):
    """Persists the entire TOM-Generator state per tenant."""

    __tablename__ = 'compliance_tom_state'

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    tenant_id = Column(String(100), nullable=False, unique=True)
    state = Column(JSON, nullable=False, default=dict)
    version = Column(Integer, nullable=False, default=1)
    created_at = Column(DateTime(timezone=True), default=datetime.utcnow, nullable=False)
    updated_at = Column(DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow)

    __table_args__ = (
        Index('idx_tom_state_tenant', 'tenant_id'),
    )

    def __repr__(self):
        return f"<TOMState tenant={self.tenant_id} v{self.version}>"


class TOMMeasureDB(Base):
    """Individual TOM measure — flat, queryable, for reports and export."""

    __tablename__ = 'compliance_tom_measures'

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    tenant_id = Column(String(100), nullable=False)
    control_id = Column(String(50), nullable=False)
    name = Column(String(300), nullable=False)
    description = Column(Text)
    category = Column(String(50), nullable=False)
    type = Column(String(20), nullable=False)
    applicability = Column(String(20), default='REQUIRED')
    applicability_reason = Column(Text)
    implementation_status = Column(String(20), default='NOT_IMPLEMENTED')
    responsible_person = Column(String(255))
    responsible_department = Column(String(255))
    implementation_date = Column(DateTime(timezone=True))
    review_date = Column(DateTime(timezone=True))
    review_frequency = Column(String(20))
    priority = Column(String(20))
    complexity = Column(String(20))
    linked_evidence = Column(JSON, default=list)
    evidence_gaps = Column(JSON, default=list)
    related_controls = Column(JSON, default=dict)
    verified_at = Column(DateTime(timezone=True))
    verified_by = Column(String(200))
    effectiveness_rating = Column(String(20))
    created_by = Column(String(200), default='system')
    created_at = Column(DateTime(timezone=True), default=datetime.utcnow, nullable=False)
    updated_at = Column(DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow)

    __table_args__ = (
        Index('idx_tom_measures_tenant', 'tenant_id'),
        Index('idx_tom_measures_category', 'tenant_id', 'category'),
        Index('idx_tom_measures_status', 'tenant_id', 'implementation_status'),
    )

    def __repr__(self):
        return f"<TOMMeasure {self.control_id}: {self.name}>"