"""Outgoing email as rows until the mail server accepts them (#5506), and
which alert events each one carries (#5507).

Revision ID: 0042_email_outbox
Revises: 0041_alert_rule_covers
Create Date: 2026-10-09
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "0042_email_outbox"
down_revision: Union[str, None] = "0041_alert_rule_covers"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "email_outbox",
        sa.Column("id", sa.String(36), primary_key=True),
        sa.Column("kind", sa.String(16), nullable=False),
        sa.Column("recipient", sa.String(320), nullable=False),
        sa.Column("tz", sa.String(64), nullable=False, server_default="UTC"),
        sa.Column("show_utc", sa.Boolean, nullable=False, server_default=sa.false()),
        sa.Column("subject", sa.Text, nullable=True),
        sa.Column("text", sa.Text, nullable=True),
        sa.Column("html", sa.Text, nullable=True),
        sa.Column("state", sa.String(10), nullable=False, server_default="pending"),
        sa.Column("retry", sa.Boolean, nullable=False, server_default=sa.true()),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("send_after", sa.DateTime(timezone=True), nullable=True),
        sa.Column("next_attempt_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("first_attempt_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("attempts", sa.Integer, nullable=False, server_default="0"),
        sa.Column("claimed_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("last_error", sa.Text, nullable=True),
        sa.Column("sent_at", sa.DateTime(timezone=True), nullable=True),
    )
    op.create_index("ix_email_outbox_state_due", "email_outbox", ["state", "next_attempt_at"])
    op.create_index("ix_email_outbox_created", "email_outbox", ["created_at"])
    op.create_table(
        "email_outbox_events",
        sa.Column("outbox_id", sa.String(36),
                  sa.ForeignKey("email_outbox.id", ondelete="CASCADE"), primary_key=True),
        sa.Column("event_id", sa.String(36),
                  sa.ForeignKey("alert_events.id", ondelete="CASCADE"), primary_key=True),
    )
    op.create_index("ix_email_outbox_events_event_id", "email_outbox_events", ["event_id"])


def downgrade() -> None:
    op.drop_index("ix_email_outbox_events_event_id", table_name="email_outbox_events")
    op.drop_table("email_outbox_events")
    op.drop_index("ix_email_outbox_created", table_name="email_outbox")
    op.drop_index("ix_email_outbox_state_due", table_name="email_outbox")
    op.drop_table("email_outbox")