import os
from dataclasses import dataclass
from typing import Union


@dataclass
class ServerParameterManager:
    retriver_device: str = os.environ.get("RETRIEVER_DEVICE", "cpu")
    reader_device: str = os.environ.get("READER_DEVICE", "cpu")
    index_device: str = os.environ.get("INDEX_DEVICE", retriver_device)
    precision: Union[str, int] = os.environ.get("PRECISION", "fp32")
    index_precision: Union[str, int] = os.environ.get("INDEX_PRECISION", precision)
    question_encoder: str = os.environ.get("QUESTION_ENCODER", None)
    passage_encoder: str = os.environ.get("PASSAGE_ENCODER", None)
    document_index: str = os.environ.get("DOCUMENT_INDEX", None)
    reader_encoder: str = os.environ.get("READER_ENCODER", None)
    top_k: int = int(os.environ.get("TOP_K", 100))
    use_faiss: bool = os.environ.get("USE_FAISS", False)
    window_batch_size: int = int(os.environ.get("WINDOW_BATCH_SIZE", 32))
    window_size: int = int(os.environ.get("WINDOW_SIZE", 32))
    window_stride: int = int(os.environ.get("WINDOW_SIZE", 16))
    split_on_spaces: bool = os.environ.get("SPLIT_ON_SPACES", False)


class RayParameterManager:
    def __init__(self) -> None:
        self.num_gpus = int(os.environ.get("NUM_GPUS", 1))
        self.min_replicas = int(os.environ.get("MIN_REPLICAS", 1))
        self.max_replicas = int(os.environ.get("MAX_REPLICAS", 1))