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# "License"); you may not use this file except in compliance
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"""Increase length of ``Flask-AppBuilder`` ``ab_view_menu.name`` column

Revision ID: 03afc6b6f902
Revises: 92c57b58940d
Create Date: 2020-11-13 22:21:41.619565

"""
from __future__ import annotations

import sqlalchemy as sa
from alembic import op
from sqlalchemy import inspect

from airflow.migrations.db_types import StringID

# revision identifiers, used by Alembic.
revision = '03afc6b6f902'
down_revision = '92c57b58940d'
branch_labels = None
depends_on = None
airflow_version = '1.10.13'


def upgrade():
    """Apply Increase length of ``Flask-AppBuilder`` ``ab_view_menu.name`` column"""
    conn = op.get_bind()
    inspector = inspect(conn)
    tables = inspector.get_table_names()

    if "ab_view_menu" in tables:
        if conn.dialect.name == "sqlite":
            op.execute("PRAGMA foreign_keys=off")
            op.execute(
                """
            CREATE TABLE IF NOT EXISTS ab_view_menu_dg_tmp
            (
                id INTEGER NOT NULL PRIMARY KEY,
                name VARCHAR(250) NOT NULL UNIQUE
            );
            """
            )
            op.execute("INSERT INTO ab_view_menu_dg_tmp(id, name) select id, name from ab_view_menu;")
            op.execute("DROP TABLE ab_view_menu")
            op.execute("ALTER TABLE ab_view_menu_dg_tmp rename to ab_view_menu;")
            op.execute("PRAGMA foreign_keys=on")
        else:
            op.alter_column(
                table_name='ab_view_menu',
                column_name='name',
                type_=StringID(length=250),
                nullable=False,
            )


def downgrade():
    """Unapply Increase length of ``Flask-AppBuilder`` ``ab_view_menu.name`` column"""
    conn = op.get_bind()
    inspector = inspect(conn)
    tables = inspector.get_table_names()
    if "ab_view_menu" in tables:
        if conn.dialect.name == "sqlite":
            op.execute("PRAGMA foreign_keys=off")
            op.execute(
                """
                CREATE TABLE IF NOT EXISTS ab_view_menu_dg_tmp
                (
                    id INTEGER NOT NULL PRIMARY KEY,
                    name VARCHAR(100) NOT NULL UNIQUE
                );
                """
            )
            op.execute("INSERT INTO ab_view_menu_dg_tmp(id, name) select id, name from ab_view_menu;")
            op.execute("DROP TABLE ab_view_menu")
            op.execute("ALTER TABLE ab_view_menu_dg_tmp rename to ab_view_menu;")
            op.execute("PRAGMA foreign_keys=on")
        else:
            op.alter_column(
                table_name='ab_view_menu', column_name='name', type_=sa.String(length=100), nullable=False
            )
