from transformers import Pipeline
import nltk

nltk.download("averaged_perceptron_tagger")
nltk.download("averaged_perceptron_tagger_eng")
import requests


def get_wikipedia_page_props(input_str: str):
    """
    Retrieves the QID for a given Wikipedia page name from the specified language Wikipedia.
    If the request fails, it falls back to using the OpenRefine Wikidata API.

    Args:
        input_str (str): The input string in the format "page_name >> language".

    Returns:
        str: The QID or "NIL" if the QID is not found.
    """
    try:
        # Preprocess the input string
        page_name, language = input_str.split(" >> ")
        page_name = page_name.strip()
        language = language.strip()
    except ValueError:
        return "Invalid input format. Use 'page_name >> language'."

    wikipedia_url = f"https://{language}.wikipedia.org/w/api.php"
    wikipedia_params = {
        "action": "query",
        "prop": "pageprops",
        "format": "json",
        "titles": page_name,
    }

    qid = "NIL"
    try:
        # Attempt to fetch from Wikipedia API
        response = requests.get(wikipedia_url, params=wikipedia_params)
        response.raise_for_status()
        data = response.json()

        if "pages" in data["query"]:
            page_id = list(data["query"]["pages"].keys())[0]

            if "pageprops" in data["query"]["pages"][page_id]:
                page_props = data["query"]["pages"][page_id]["pageprops"]

                if "wikibase_item" in page_props:
                    return page_props["wikibase_item"]
                else:
                    return qid
            else:
                return qid
    except Exception as e:
        return qid


def get_wikipedia_title(qid, language="en"):
    url = f"https://www.wikidata.org/w/api.php"
    params = {
        "action": "wbgetentities",
        "format": "json",
        "ids": qid,
        "props": "sitelinks/urls",
        "sitefilter": f"{language}wiki",
    }

    response = requests.get(url, params=params)
    data = response.json()

    try:
        title = data["entities"][qid]["sitelinks"][f"{language}wiki"]["title"]
        url = data["entities"][qid]["sitelinks"][f"{language}wiki"]["url"]
        return title, url
    except KeyError:
        return "NIL", "None"


class NelPipeline(Pipeline):

    def _sanitize_parameters(self, **kwargs):
        preprocess_kwargs = {}
        if "text" in kwargs:
            preprocess_kwargs["text"] = kwargs["text"]

        return preprocess_kwargs, {}, {}

    def preprocess(self, text, **kwargs):

        outputs = self.model.generate(
            **self.tokenizer([text], return_tensors="pt"),
            num_beams=5,
            num_return_sequences=5,
            max_new_tokens=30,
        )
        wikipedia_predictons = self.tokenizer.batch_decode(
            outputs, skip_special_tokens=True
        )
        # print(f"Decoded: {wikipedia_predictons}")

        return wikipedia_predictons

    def _forward(self, inputs):
        return inputs

    def postprocess(self, outputs, **kwargs):
        """
        Postprocess the outputs of the model
        :param outputs:
        :param kwargs:
        :return:
        """

        results = []
        for wikipedia_name in outputs:
            # Get QID
            qid = get_wikipedia_page_props(wikipedia_name)
            # print(f"{wikipedia_name} -- QID: {qid}")

            # Get Wikipedia title and URL
            title, url = get_wikipedia_title(qid)
            results.append({"title": title, "qid": qid, "url": url})

        return results