"""Remove quiz reminders.

Revision ID: a1b2c3d4e5f6
Revises: f0a1b2c3d4e5
"""
import sqlalchemy as sa
from alembic import op
from sqlalchemy import inspect

revision = "a1b2c3d4e5f6"
down_revision = "f0a1b2c3d4e5"
branch_labels = None
depends_on = None


def upgrade():
    # Emailed nudges to retake a quiz below 75%. The platform is about sessions
    # and topics now, and a scheduler existed solely to send these.
    if "reminder_schedules" in inspect(op.get_bind()).get_table_names():
        op.drop_table("reminder_schedules")


def downgrade():
    op.create_table(
        "reminder_schedules",
        sa.Column("id", sa.Integer, primary_key=True),
        sa.Column("user_id", sa.Integer, sa.ForeignKey("users.id", ondelete="CASCADE"), nullable=False),
        sa.Column("quiz_id", sa.Integer, sa.ForeignKey("quizzes.id", ondelete="CASCADE"), nullable=False),
        sa.Column("next_reminder_at", sa.DateTime, nullable=False),
        sa.Column("interval_days", sa.Integer, server_default="1"),
        sa.Column("performance_score", sa.Float, server_default="0"),
        sa.Column("is_active", sa.Boolean, server_default=sa.true()),
        sa.Column("created_at", sa.DateTime, server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime, server_default=sa.func.now()),
    )