from serenitas.utils.misc import get_credential_path
import json
import posixpath
from urllib.parse import urljoin
from typing import ClassVar
import requests
import pandas as pd


def load_api_key():
    with get_credential_path("markit_api").open() as fh:
        creds = json.load(fh)
    base_url = creds.pop("url")
    r = requests.post(
        urljoin(base_url, "apikey"),
        data=creds,
    )
    return base_url, r.text


class MarkitAPI:
    base_url, api_key = load_api_key()

    @classmethod
    def get_data(cls, asset_class, after=None, service="latest"):
        params = {
            "format": "json",
            "assetClass": asset_class,
            "apikey": cls.api_key,
            "limit": 1000,
            "sortBy": "receivedDateTime",
            "descending": "true",
            "dateformat": "MILLISECONDSSINCEEPOCH",
        }
        if after:
            params["after"] = after
        path = posixpath.join("parsing", "Quote", service)
        url = urljoin(cls.base_url, path)
        r = requests.get(url, params)
        print(params)
        return cls.read_api(r)

    @staticmethod
    def read_api(r):
        df = pd.DataFrame.from_dict(json.loads(r.text))
        if df.empty:
            return
        df.columns = df.columns.str.lower()
        return df.to_dict(orient="records")