"""replace global visit window with per-visit schedule

Revision ID: 20260508_01
Revises: 20260331_01
Create Date: 2026-05-08 11:30:00.000000

"""

from typing import Sequence, Union

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


revision: str = "20260508_01"
down_revision: Union[str, None] = "20260331_01"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "studies",
        sa.Column(
            "visit_schedule",
            postgresql.JSONB(astext_type=sa.Text()),
            nullable=False,
            server_default=sa.text("'[]'::jsonb"),
        ),
    )
    op.drop_column("studies", "visit_window_end_offset")
    op.drop_column("studies", "visit_window_start_offset")
    op.drop_column("studies", "visit_total")
    op.drop_column("studies", "visit_interval_days")


def downgrade() -> None:
    op.add_column("studies", sa.Column("visit_interval_days", sa.Integer(), nullable=True))
    op.add_column("studies", sa.Column("visit_total", sa.Integer(), nullable=True))
    op.add_column("studies", sa.Column("visit_window_start_offset", sa.Integer(), nullable=True))
    op.add_column("studies", sa.Column("visit_window_end_offset", sa.Integer(), nullable=True))
    op.drop_column("studies", "visit_schedule")