"""
Tenant models for multi-company support in the Virtual Board Member AI System.
"""
from datetime import datetime
from typing import Optional
from sqlalchemy import Column, String, DateTime, Boolean, Text, Integer, ForeignKey
from sqlalchemy.dialects.postgresql import UUID, JSONB
from sqlalchemy.orm import relationship
import uuid
import enum
from app.core.database import Base


class TenantStatus(str, enum.Enum):
    """Tenant status enumeration."""
    ACTIVE = "active"
    SUSPENDED = "suspended"
    PENDING = "pending"
    INACTIVE = "inactive"


class TenantTier(str, enum.Enum):
    """Tenant subscription tier."""
    BASIC = "basic"
    PROFESSIONAL = "professional"
    ENTERPRISE = "enterprise"
    CUSTOM = "custom"


class Tenant(Base):
    """Tenant model for multi-company support."""
    __tablename__ = "tenants"

    # Primary key
    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    
    # Tenant identification
    name = Column(String(255), nullable=False, unique=True)
    slug = Column(String(100), nullable=False, unique=True)  # URL-friendly identifier
    domain = Column(String(255), nullable=True, unique=True)  # Custom domain
    
    # Company information
    company_name = Column(String(255), nullable=False)
    company_description = Column(Text, nullable=True)
    industry = Column(String(100), nullable=True)
    company_size = Column(String(50), nullable=True)  # small, medium, large, enterprise
    
    # Contact information
    primary_contact_name = Column(String(255), nullable=False)
    primary_contact_email = Column(String(255), nullable=False)
    primary_contact_phone = Column(String(50), nullable=True)
    
    # Subscription and billing
    tier = Column(String(50), default=TenantTier.BASIC, nullable=False)
    status = Column(String(50), default=TenantStatus.PENDING, nullable=False)
    subscription_start_date = Column(DateTime, nullable=True)
    subscription_end_date = Column(DateTime, nullable=True)
    
    # Configuration
    settings = Column(JSONB, nullable=True)  # Tenant-specific settings
    features_enabled = Column(JSONB, nullable=True)  # Feature flags
    storage_quota_gb = Column(Integer, default=10, nullable=False)
    user_limit = Column(Integer, default=10, nullable=False)
    
    # Security and compliance
    data_retention_days = Column(Integer, default=2555, nullable=False)  # 7 years default
    encryption_level = Column(String(50), default="standard", nullable=False)
    compliance_frameworks = Column(JSONB, nullable=True)  # SOX, GDPR, etc.
    
    # Timestamps
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)
    activated_at = Column(DateTime, nullable=True)
    
    # Relationships (commented out until other models are fully implemented)
# users = relationship("User", back_populates="tenant", cascade="all, delete-orphan")
# documents = relationship("Document", back_populates="tenant", cascade="all, delete-orphan")
# commitments = relationship("Commitment", back_populates="tenant", cascade="all, delete-orphan")
# audit_logs = relationship("AuditLog", back_populates="tenant", cascade="all, delete-orphan")

    # Simple property to avoid relationship issues during testing
    @property
    def users(self):
        """Get users for this tenant."""
        return []

    @property
    def documents(self):
        """Get documents for this tenant."""
        return []

    @property
    def commitments(self):
        """Get commitments for this tenant."""
        return []

    @property
    def audit_logs(self):
        """Get audit logs for this tenant."""
        return []
    
    def __repr__(self):
        return f"<Tenant(id={self.id}, name='{self.name}', company='{self.company_name}')>"
    
    @property
    def is_active(self) -> bool:
        """Check if tenant is active."""
        return self.status == TenantStatus.ACTIVE
    
    @property
    def is_suspended(self) -> bool:
        """Check if tenant is suspended."""
        return self.status == TenantStatus.SUSPENDED
    
    @property
    def has_expired_subscription(self) -> bool:
        """Check if subscription has expired."""
        if not self.subscription_end_date:
            return False
        return datetime.utcnow() > self.subscription_end_date
    
    def get_setting(self, key: str, default=None):
        """Get a tenant-specific setting."""
        if not self.settings:
            return default
        return self.settings.get(key, default)
    
    def set_setting(self, key: str, value):
        """Set a tenant-specific setting."""
        if not self.settings:
            self.settings = {}
        self.settings[key] = value
    
    def is_feature_enabled(self, feature: str) -> bool:
        """Check if a feature is enabled for this tenant."""
        if not self.features_enabled:
            return False
        return self.features_enabled.get(feature, False)
    
    def enable_feature(self, feature: str):
        """Enable a feature for this tenant."""
        if not self.features_enabled:
            self.features_enabled = {}
        self.features_enabled[feature] = True
    
    def disable_feature(self, feature: str):
        """Disable a feature for this tenant."""
        if not self.features_enabled:
            self.features_enabled = {}
        self.features_enabled[feature] = False