from __future__ import annotations

from celery import shared_task


@shared_task(name="govoplan_calendar.sync_due_caldav_sources")
def sync_due_caldav_sources_task(tenant_id: str | None = None, limit: int = 50) -> list[dict[str, object]]:
    from govoplan_calendar.backend.service import sync_due_sources
    from govoplan_core.core.module_entitlements import tenant_execution_scope
    from govoplan_core.core.worker_runtime import build_worker_platform_registry
    from govoplan_core.db.session import get_database
    from govoplan_core.settings import settings

    with get_database().SessionLocal() as session:
        registry = build_worker_platform_registry(settings)
        resolver = registry.tenant_entitlement_resolver()
        admissions = (
            (
                resolver.admission(
                    session,
                    tenant_id=tenant_id,
                    module_id="calendar",
                    work_state="accepted",
                ),
            )
            if tenant_id is not None
            else resolver.active_tenant_admissions(
                session,
                module_id="calendar",
                work_state="accepted",
            )
        )
        payload: list[dict[str, object]] = []
        for admission in admissions:
            if not admission.allowed:
                payload.append(
                    {
                        "tenant_id": admission.tenant_id,
                        "status": "operator_action_required",
                        "operator_action": admission.payload(),
                    }
                )
                continue
            with tenant_execution_scope(
                resolver,
                session,
                tenant_id=admission.tenant_id,
                work_state="accepted",
            ):
                results = sync_due_sources(
                    session,
                    tenant_id=admission.tenant_id,
                    limit=limit,
                )
            payload.extend(
                {
                    "tenant_id": admission.tenant_id,
                    "source_id": item.source_id,
                    "calendar_id": item.calendar_id,
                    "status": item.status,
                    "error": item.error,
                    "created": item.stats.created if item.stats else 0,
                    "updated": item.stats.updated if item.stats else 0,
                    "deleted": item.stats.deleted if item.stats else 0,
                    "unchanged": item.stats.unchanged if item.stats else 0,
                    "fetched": item.stats.fetched if item.stats else 0,
                }
                for item in results
            )
        session.commit()
        return payload