"""Email delivery log model."""
import uuid
import enum
from datetime import datetime, timezone
from sqlalchemy import String, DateTime, Enum as SAEnum, ForeignKey, Text
from sqlalchemy.orm import Mapped, mapped_column
from app.database import Base


class EmailStatus(str, enum.Enum):
    sent = "sent"
    failed = "failed"


class EmailType(str, enum.Enum):
    invoice = "invoice"
    low_credit = "low_credit"
    license_expiry = "license_expiry"
    overdue_warning = "overdue_warning"
    suspension = "suspension"
    monthly_report = "monthly_report"
    welcome = "welcome"
    test = "test"
    other = "other"


class EmailLog(Base):
    __tablename__ = "email_logs"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    school_id: Mapped[str | None] = mapped_column(
        String(36), ForeignKey("schools.id", ondelete="SET NULL"), nullable=True, index=True
    )
    to_email: Mapped[str] = mapped_column(String(255), nullable=False, index=True)
    subject: Mapped[str] = mapped_column(String(500), nullable=False)
    email_type: Mapped[EmailType] = mapped_column(SAEnum(EmailType), default=EmailType.other, nullable=False, index=True)
    status: Mapped[EmailStatus] = mapped_column(SAEnum(EmailStatus), nullable=False, index=True)
    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)
    sent_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )