from __future__ import annotations

import os
from logging.config import fileConfig

from alembic import context
from sqlalchemy import engine_from_config, pool

from supply_infra.config import get_infra_settings
from supply_infra.db.base import Base
import supply_infra.db.models  # noqa: F401

config = context.config
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# CI and migration smoke tests may supply an isolated database URL without
# changing the application's runtime MySQL configuration.
database_url = os.environ.get("ALEMBIC_DATABASE_URL") or get_infra_settings().mysql_url

# Alembic uses ConfigParser interpolation; escaped credentials may contain "%".
config.set_main_option(
    "sqlalchemy.url",
    database_url.replace("%", "%%"),
)
target_metadata = Base.metadata


def run_migrations_offline() -> None:
    context.configure(
        url=config.get_main_option("sqlalchemy.url"),
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
        compare_type=True,
    )
    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online() -> None:
    connectable = engine_from_config(
        config.get_section(config.config_ini_section, {}),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )
    with connectable.connect() as connection:
        if connection.dialect.name == "mysql":
            connection.exec_driver_sql("SET time_zone = '+08:00'")
            connection.commit()
        context.configure(
            connection=connection,
            target_metadata=target_metadata,
            compare_type=True,
        )
        with context.begin_transaction():
            context.run_migrations()


if context.is_offline_mode():
    run_migrations_offline()
else:
    run_migrations_online()