"""
System-related database models
"""
from sqlalchemy import Column, String, Text, DateTime, ForeignKey, Boolean
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from sqlalchemy.dialects.postgresql import UUID as PG_UUID
import uuid
from app.db.session import Base


class EmailTemplate(Base):
    __tablename__ = "email_templates"

    template_id = Column(PG_UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, index=True)
    template_name = Column(String(50), unique=True, nullable=False)
    subject = Column(String(255), nullable=False)
    html_content = Column(Text, nullable=False)
    text_content = Column(Text)
    variables = Column(Text)  # JSON string of available template variables
    language_id = Column(PG_UUID(as_uuid=True), ForeignKey("languages.language_id"))
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())

    # Relationships
    language = relationship("Language")
    email_logs = relationship("EmailLog", back_populates="template")


class EmailLog(Base):
    __tablename__ = "email_logs"

    log_id = Column(PG_UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, index=True)
    recipient_email = Column(String(255), nullable=False)
    template_id = Column(PG_UUID(as_uuid=True), ForeignKey("email_templates.template_id"))
    subject = Column(String(255))
    status = Column(String(20), default='pending')  # 'pending', 'sent', 'failed'
    error_message = Column(Text)
    sent_at = Column(DateTime(timezone=True))
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    # Relationships
    template = relationship("EmailTemplate", back_populates="email_logs")


class SystemSetting(Base):
    __tablename__ = "system_settings"

    setting_id = Column(PG_UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, index=True)
    setting_key = Column(String(100), unique=True, nullable=False)
    setting_value = Column(Text)
    description = Column(Text)
    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())