from typing import Dict, Any
from transformers import pipeline
import holidays
import PIL.Image
import io
import pytesseract

class PreTrainedPipeline():
    def __init__(self, model_path="PrimWong/layout_qa_hparam_tuning"):
        # Initializing the document-question-answering pipeline with the specified model
        self.pipeline = pipeline("document-question-answering", model=model_path)
        self.holidays = holidays.US()

    def __call__(self, data: Dict[str, Any]) -> str:
        """
        Process input data for document question answering with optional holiday checking.

        Args:
            data (Dict[str, Any]): Input data containing an 'inputs' field with 'image' and 'question',
                                   and optionally a 'date' field.

        Returns:
            str: The answer to the question or a holiday message if applicable.
        """
        inputs = data.get('inputs', {})
        date = data.get("date")

        # Check if date is provided and if it's a holiday
        if date and date in self.holidays:
            return "Today is a holiday!"

        # Process the image and question for document question answering
        image_path = inputs.get("image")
        question = inputs.get("question")

        # Load and process an image
        image = PIL.Image.open(image_path)
        image_text = pytesseract.image_to_string(image)  # Use OCR to extract text

        # Run prediction (Note: this now uses the extracted text, not the image directly)
        prediction = self.pipeline(question=question, context=image_text)
        return prediction["answer"]  # Adjust based on actual output format of the model

# Note: This script assumes the use of pytesseract for OCR to process images. Ensure pytesseract is configured properly.