from datetime import datetime
from json import dumps
from random import SystemRandom
from string import ascii_lowercase, digits

from classes import HTTPClient


class Hafas:
    API_URL = "https://fahrplan.oebb.at/bin/mgate.exe?rnd=%i"

    BASE_CONTENT = {
        "id": None,
        "ver": "1.32",
        "lang": "deu",
        "auth": {
            "type": "AID",
            "aid": "5vHavmuWPWIfetEe"
        },
        "client": {
            "id": "OEBB",
            "type": "WEB",
            "name": "bahnapi.eu",
            "l": "oebb_py"
        },
        "formatted": False,
        "ext": "OEBB.11",
    }

    def __init__(self):
        self.timestamp = int(datetime.now().timestamp() * 1000)

    @classmethod
    def generateID(self, len=16, chars=ascii_lowercase + digits):
        r = SystemRandom()
        return "".join([r.choice(chars) for _ in range(len)])

    def buildRequest(self, request_type, request_data, **kwargs):
        client = HTTPClient(self.API_URL % int(
            datetime.now().timestamp() * 1000))

        data = self.BASE_CONTENT
        data[request_type] = request_data

        if "language" in kwargs.items():
            data["lang"] = kwargs["language"]

        if "id" in kwargs.items():
            data["id"] = kwargs["id"]
        if not data["id"]:
            data["id"] = self.__class__.generateID()

        client.data = dumps(data)
        return client

    def request(self, request_type, request_data):
        client = self.buildRequest(request_type, request_data)
        return client.execute()