"""Alembic environment configuration.

Imports the application's Base and database URL so that
``alembic revision --autogenerate`` can detect model changes.
"""

from logging.config import fileConfig

from sqlalchemy import engine_from_config, pool
from alembic import context

# -- App imports -------------------------------------------------------
from app.core.config import settings
from app.core.database import Base

# Import all models so Base.metadata is fully populated
from app.models.catalog import (  # noqa: F401
    UserAccount, Session, ProjectRegistry, ProjectMember,
)
from app.models.project import (  # noqa: F401
    Episode, EntityCanon, EntityAlias, RelationFact, RelationParticipant,
    SceneStill, EntityEpisodeLink, ImageAsset, ProjectSettings, WorldGuide,
    WebbookPackage, GenerationTrace, OperationLog, PipelineProgress,
    LLMCallLog, CharacterOutlook,
)
from app.logging.models import ActivityLog  # noqa: F401

# -- Alembic Config object --------------------------------------------
config = context.config

# Override sqlalchemy.url with the value from app settings
config.set_main_option("sqlalchemy.url", settings.database_url)

# Interpret the config file for Python logging (if present)
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

target_metadata = Base.metadata


def run_migrations_offline() -> None:
    """Run migrations in 'offline' mode (emit SQL without DB connection)."""
    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:
    """Run migrations against a live database connection."""
    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()