"""Tickets: known problems, their links to alert rules and anomalies, and their log.

Revision ID: 0048_tickets
Revises: 0047_timeline
Create Date: 2026-10-25
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import ARRAY

revision: str = "0048_tickets"
down_revision: Union[str, None] = "0047_timeline"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "tickets",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("title", sa.String(200), nullable=False),
        sa.Column("body", sa.Text, nullable=True),
        sa.Column("area", sa.String(32), nullable=False),
        sa.Column("hosts", ARRAY(sa.String(128)), nullable=False, server_default="{}"),
        sa.Column("subject", sa.String(255), nullable=True),
        sa.Column("status", sa.String(16), nullable=False, server_default="open"),
        sa.Column("opened_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("opened_by", sa.String(64), nullable=False),
        sa.Column("opened_by_id", sa.String(36), nullable=True),
        sa.Column("resolved_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("resolved_by", sa.String(64), nullable=True),
        sa.Column("resolution", sa.Text, nullable=True),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
    )
    op.create_index("ix_tickets_status", "tickets", ["status", "updated_at"])
    op.create_index("ix_tickets_hosts", "tickets", ["hosts"], postgresql_using="gin")
    op.create_table(
        "ticket_links",
        sa.Column("ticket_id", sa.Integer, sa.ForeignKey("tickets.id", ondelete="CASCADE"),
                  primary_key=True),
        sa.Column("ref_type", sa.String(32), primary_key=True),
        sa.Column("ref_id", sa.String(64), primary_key=True),
    )
    op.create_index("ix_ticket_links_ref", "ticket_links", ["ref_type", "ref_id"])
    op.create_table(
        "ticket_notes",
        sa.Column("id", sa.String(36), primary_key=True),
        sa.Column("ticket_id", sa.Integer, sa.ForeignKey("tickets.id", ondelete="CASCADE"),
                  nullable=False),
        sa.Column("at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("kind", sa.String(16), nullable=False),
        sa.Column("actor", sa.String(64), nullable=False),
        sa.Column("body", sa.Text, nullable=True),
    )
    op.create_index("ix_ticket_notes_ticket", "ticket_notes", ["ticket_id", "at"])


def downgrade() -> None:
    op.drop_table("ticket_notes")
    op.drop_table("ticket_links")
    op.drop_table("tickets")