"""Django app config — registers shard with shell at startup."""

import os

from django.apps import AppConfig


class ShellboundDjangoApp(AppConfig):
    name = "substrate_sdk.django"
    label = "substrate_sdk"
    verbose_name = "Substrate Shell SDK"
    default_auto_field = "django.db.models.BigAutoField"

    def ready(self):
        from substrate_sdk import ShellApp
        from substrate_sdk.django.middleware import set_emitter
        from substrate_sdk.django.signals import connect_signals

        shard_name = os.environ.get("SUBSTRATE_SHARD_NAME")
        if not shard_name:
            parts = os.environ.get("DJANGO_SETTINGS_MODULE", "django-app").split(".")
            shard_name = parts[-2] if len(parts) >= 2 else parts[0]
        version = os.environ.get("SUBSTRATE_SHARD_VERSION", "0.0.0")

        app = ShellApp(shard_name=shard_name, version=version)
        app.register()
        set_emitter(app.emitter)
        connect_signals(app.emitter)