import json
import urllib.parse
from classes import Hafas, Station


def getValidator(name):
    hafas = Hafas()
    data = hafas.request("svcReqL", [
        {
            "req": {
                "input": {
                    "field": "S", 
                    "loc": {
                        "name": f"{name}?",
                        "type": "ALL",
                        "dist": 1000
                        },
                        "maxLoc": 7
                    }
                },
                "meth": "LocMatch",
                "id": "1|1|"
            }
        ])
    return json.loads(data)


def validateName(name):
    stations = getValidator(name)
    for station in stations["svcResL"][0]["res"]["match"]["locL"]:
        name = station["name"]
        sttype = station["type"]
        extid = station.get("extId")
        xcoord = station["crd"]["x"]
        ycoord = station["crd"]["y"]
        prodclass = station.get("pCls")

        yield Station(name=name, sttype=sttype, extid=extid, xcoord=xcoord, ycoord=ycoord, prodclass=prodclass)


def worker(name, json=False):
    outtext = """{
 "stations": [
""" if json else """<?xml version="1.0" encoding="UTF-8"?>
<stations>
"""

    for station in validateName(name):
        outtext += ",\n" if (json and not outtext.strip()[-1] == "[") else ""
        outtext += station.json(2) if json else station.xml(1)
        outtext += "\n" if not json else ""

    outtext += """
 ]
}""" if json else "</stations>"

    return outtext