# REMINDER: this code needs to be rewritten for the new framework. Remove this comment when the code is fully converted.

import numpy as np
from scipy.stats import pearsonr, spearmanr
from sklearn.metrics import f1_score, matthews_corrcoef
from tqdm import auto as tqdm_lib
from . common import HFTask, simple_accuracy_metric, yesno

class SQuAD(HFTask):
    DATASET_PATH = "squad_v2"
    DATASET_NAME = None

    def has_training_docs(self):
        return True

    def has_validation_docs(self):
        return True

    def has_test_docs(self):
        return False

    def training_docs(self):
        if self.has_training_docs():
            return self.data["train"]

    def validation_docs(self):
        if self.has_validation_docs():
            return self.data["validation"]

    def fewshot_description(self):
        # TODO: redo description
        return "Title: The_Title_of_It\n\nBackground: A text passage as background to answer the question with.\n\nQ: Question about the passage.\n\nA: Answer."

    def doc_to_text(self, doc):
        return 'Title: ' + doc['title'] + '\n\n' + 'Background: ' + doc['context'] + '\n\n' + 'Q: ' + doc['question'] + '\n\n' + 'A: '

    def doc_to_target(self, doc):
        answer_list = doc['answers']['text']
        if len(answer_list) > 0:
            answer = answer_list[0]
        else:
            answer = 'unanswerable'
        return answer

    # TODO: Implement evaluation code

    # ***IMPORTANT***: this evaluation function needs to be written for the new framework. 
    # For more info, check out the interface in base.py and the example BoolQ implementation in superglue.py. 
    # Remove this comment when the evaluation code is implemented.