from __future__ import annotations

from typing import Any, Dict, Optional, Tuple

from fastapi import Request

from app.services.converter_service import ConverterService
from app.services.embeddings_service import EmbeddingService
from app.services.extraction_service import ExtractionService
from app.services.text_cleaner_service import TextCleanerService
from app.services.scheduler_service import SchedulerService
from app.services.vector_store_service import VectorStoreService

_converter_service = ConverterService()
_extraction_service = ExtractionService()
_text_cleaner_service = TextCleanerService()


def get_text_cleaner_service() -> TextCleanerService:
    return _text_cleaner_service


def get_converter_service() -> ConverterService:
    return _converter_service


def get_extraction_service() -> ExtractionService:
    return _extraction_service


def get_embeddings_service() -> EmbeddingService:
    from app.api.server import _embedding_service
    return _embedding_service


def get_vector_store_service() -> VectorStoreService:
    from app.api.server import _vector_store_service
    return _vector_store_service


def get_scheduler_service() -> SchedulerService:
    from app.api.server import _scheduler_service
    return _scheduler_service


def get_redis_scripts(request: Request) -> Tuple[Optional[Any], Dict[str, str]]:
    """Extract Redis client and Lua scripts from app state.

    Consolidates the repeated pattern:
        redis = getattr(request.app.state, "redis", None)
        scripts = getattr(request.app.state, "scripts", None)
    """
    return (
        getattr(request.app.state, "redis", None),
        getattr(request.app.state, "scripts", {}),
    )