from logging.config import fileConfig

from alembic import context
from sqlalchemy import engine_from_config, pool
from sqlmodel import SQLModel
from tidb_vector.sqlalchemy import VectorType

from app.core.config import settings
from app.models import *  # noqa
from app.models.knowledge_base_scoped.table_naming import (
    KB_CHUNKS_TABLE_PATTERN,
    KB_ENTITIES_TABLE_PATTERN,
    KB_RELATIONSHIPS_TABLE_PATTERN,
)

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config

# Interpret the config file for Python logging.
# This line sets up loggers basically.
fileConfig(config.config_file_name)

# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
# target_metadata = None

target_metadata = SQLModel.metadata


def get_url():
    return str(settings.SQLALCHEMY_DATABASE_URI)


def include_name(name, type_, parent_names):
    if type_ == "table":
        return (
            not bool(KB_CHUNKS_TABLE_PATTERN.match(name))
            and not bool(KB_ENTITIES_TABLE_PATTERN.match(name))
            and not bool(KB_RELATIONSHIPS_TABLE_PATTERN.match(name))
        )
    else:
        return True


def run_migrations_offline():
    """Run migrations in 'offline' mode.

    This configures the context with just a URL
    and not an Engine, though an Engine is acceptable
    here as well.  By skipping the Engine creation
    we don't even need a DBAPI to be available.

    Calls to context.execute() here emit the given string to the
    script output.

    """
    url = get_url()
    context.configure(
        url=url,
        target_metadata=target_metadata,
        include_name=include_name,
        literal_binds=True,
        compare_type=True,
    )

    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online():
    """Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.

    """
    configuration = config.get_section(config.config_ini_section)
    configuration["sqlalchemy.url"] = get_url()
    connectable = engine_from_config(
        configuration,
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )

    with connectable.connect() as connection:
        connection.dialect.ischema_names["vector"] = VectorType
        context.configure(
            connection=connection,
            target_metadata=target_metadata,
            include_name=include_name,
            compare_type=True,
        )

        with context.begin_transaction():
            context.run_migrations()


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