"""Alembic environment configuration."""

import os
from logging.config import fileConfig
from dotenv import load_dotenv

from sqlalchemy import engine_from_config
from sqlalchemy import pool

from alembic import context
from sqlmodel import SQLModel

# Load environment variables from .env file
load_dotenv()

# Import all models to ensure they're registered with SQLModel
from backend.modules.data_entry.db.models.receipt import Receipt, ReceiptAttachment
from backend.modules.data_entry.db.models.accounting_entry import AccountingEntry
from backend.modules.data_entry.db.models.nomenclature import SyncedSupplier, LocalSupplier, SyncedCashRegister
from backend.modules.data_entry.db.models.ocr_settings import UserOCRPreference, OCRJobMetrics

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

# Override sqlalchemy.url from environment variable if set
db_path = os.getenv("SQLITE_DATABASE_PATH", "data/receipts/receipts.db")
config.set_main_option("sqlalchemy.url", f"sqlite:///{db_path}")

# Interpret the config file for Python logging.
# This line sets up loggers basically.
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# add your model's MetaData object here
# for 'autogenerate' support
target_metadata = SQLModel.metadata


def run_migrations_offline() -> None:
    """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 = config.get_main_option("sqlalchemy.url")
    context.configure(
        url=url,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
        render_as_batch=True,  # Required for SQLite ALTER TABLE support
    )

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


def run_migrations_online() -> None:
    """Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.
    """
    connectable = engine_from_config(
        config.get_section(config.config_ini_section, {}),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )

    with connectable.connect() as connection:
        context.configure(
            connection=connection,
            target_metadata=target_metadata,
            render_as_batch=True,  # Required for SQLite ALTER TABLE support
        )

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


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