from logging.config import fileConfig
from sqlalchemy import engine_from_config, pool
from alembic import context
import os
import sys

sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))

from app.core.config import get_settings
from app.models import Base

config = context.config

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


def get_url() -> str:
    settings = get_settings()
    return (
        f"mysql+pymysql://{settings.db_user}:{settings.db_password}"
        f"@{settings.db_host}:{settings.db_port}/{settings.db_name}"
        "?charset=utf8mb4"
    )


target_metadata = Base.metadata


def run_migrations_offline() -> None:
    url = get_url()
    context.configure(
        url=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:
    configuration = config.get_section(config.config_ini_section) or {}
    configuration["sqlalchemy.url"] = get_url()
    connectable = engine_from_config(
        configuration,
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )

    with connectable.connect() as connection:
        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()