# Created by: Claude
# Date: 2026-01-02
# Purpose: Configuration de l'environnement Alembic
# Refs: server/CLAUDE.md

from logging.config import fileConfig
from sqlalchemy import engine_from_config
from sqlalchemy import pool
from alembic import context
import sys
from pathlib import Path

# Ajouter le dossier src au path
sys.path.insert(0, str(Path(__file__).parent.parent))

from src.db.base import Base
from src.db.models import User, Device, Room, RoomMember, Message, P2PSession
from src.config import settings

# Alembic Config object
config = context.config

# Interpréter le fichier de configuration pour les loggers
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# Métadonnées des modèles pour autogenerate
target_metadata = Base.metadata

# Overrider l'URL de la DB depuis les settings
config.set_main_option("sqlalchemy.url", settings.database_url)


def run_migrations_offline() -> None:
    """
    Exécuter les migrations en mode 'offline'.
    Configure le contexte avec juste une URL, sans créer d'Engine.
    """
    url = config.get_main_option("sqlalchemy.url")
    context.configure(
        url=url,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
    )

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


def run_migrations_online() -> None:
    """
    Exécuter les migrations en mode 'online'.
    Crée un Engine et associe une connexion au contexte.
    """
    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
        )

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


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