"""create_activity_runs

Revision ID: 0002
Revises: 0001
Create Date: 2026-03-26

"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op
from sqlalchemy.dialects.postgresql import JSONB

revision: str = "0002"
down_revision: Union[str, Sequence[str], None] = "0001"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "activity_runs",
        sa.Column("run_id", sa.UUID(), nullable=False),
        sa.Column("activity_id", sa.UUID(), nullable=False),
        sa.Column("scheduled_for", sa.DateTime(timezone=True), nullable=True),
        sa.Column(
            "fired_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("now()"),
        ),
        sa.Column("context_snapshot", JSONB(), nullable=False, server_default="{}"),
        sa.Column("tasks_spawned", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("version_used", sa.Integer(), nullable=False),
        sa.ForeignKeyConstraint(
            ["activity_id"],
            ["activity_definitions.id"],
            ondelete="RESTRICT",
        ),
        sa.PrimaryKeyConstraint("run_id"),
    )
    op.create_index("ix_activity_runs_activity_id", "activity_runs", ["activity_id"])


def downgrade() -> None:
    op.drop_index("ix_activity_runs_activity_id", table_name="activity_runs")
    op.drop_table("activity_runs")