"""restore calendar subscriptions after the reverted release

Revision ID: 0020_calendar_subscriptions
Revises: 0019_backup_imports

The original revision reached production before the feature was reverted. Existing
databases may therefore already contain the table while fresh databases do not.
Keep the revision id and make the schema operation idempotent for both cases.
"""

import sqlalchemy as sa
from alembic import op

revision = "0020_calendar_subscriptions"
down_revision = "0019_backup_imports"
branch_labels = None
depends_on = None


def upgrade() -> None:
    bind = op.get_bind()
    if "calendar_subscriptions" in sa.inspect(bind).get_table_names():
        return
    op.create_table(
        "calendar_subscriptions",
        sa.Column("id", sa.Uuid(), nullable=False),
        sa.Column("user_id", sa.Uuid(), nullable=False),
        sa.Column("name", sa.String(length=120), nullable=False),
        sa.Column("url", sa.Text(), nullable=False),
        sa.Column("color", sa.String(length=32), nullable=False),
        sa.Column("enabled", sa.Boolean(), nullable=False),
        sa.Column("ics_cache", sa.Text(), nullable=True),
        sa.Column("etag", sa.String(length=512), nullable=True),
        sa.Column("last_modified", sa.String(length=512), nullable=True),
        sa.Column("refreshed_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("last_error", sa.Text(), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
        sa.PrimaryKeyConstraint("id"),
    )
    op.create_index(
        "ix_calendar_subscriptions_user_id", "calendar_subscriptions", ["user_id"]
    )


def downgrade() -> None:
    bind = op.get_bind()
    if "calendar_subscriptions" not in sa.inspect(bind).get_table_names():
        return
    op.drop_index("ix_calendar_subscriptions_user_id", table_name="calendar_subscriptions")
    op.drop_table("calendar_subscriptions")