"""init

Revision ID: 001
Revises:
Create Date: 2026-03-21

"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "001"
down_revision: Union[str, None] = None
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "tests",
        sa.Column("id", sa.Integer(), nullable=False),
        sa.Column("title", sa.String(255), nullable=False),
        sa.Column("description", sa.Text(), nullable=True),
        sa.Column("passing_score", sa.Integer(), nullable=False),
        sa.Column("time_limit", sa.Integer(), nullable=True),
        sa.Column("allow_navigation_back", sa.Boolean(), nullable=False, server_default="true"),
        sa.Column("is_active", sa.Boolean(), nullable=False, server_default="true"),
        sa.Column("version", sa.Integer(), nullable=False, server_default="1"),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.text("now()"),
        ),
        sa.PrimaryKeyConstraint("id"),
    )

    op.create_table(
        "questions",
        sa.Column("id", sa.Integer(), nullable=False),
        sa.Column("test_id", sa.Integer(), sa.ForeignKey("tests.id"), nullable=False),
        sa.Column("text", sa.Text(), nullable=False),
        sa.Column("order", sa.Integer(), nullable=False),
        sa.PrimaryKeyConstraint("id"),
    )

    op.create_table(
        "answers",
        sa.Column("id", sa.Integer(), nullable=False),
        sa.Column(
            "question_id", sa.Integer(), sa.ForeignKey("questions.id"), nullable=False
        ),
        sa.Column("text", sa.Text(), nullable=False),
        sa.Column("is_correct", sa.Boolean(), nullable=False),
        sa.PrimaryKeyConstraint("id"),
    )


def downgrade() -> None:
    op.drop_table("answers")
    op.drop_table("questions")
    op.drop_table("tests")