import lxml.etree
from lxml import etree
import json
import datetime as dt
from aktion_status import AktionsStatus


class App:

    def __init__(self):
        self._hide_elements = []
        self._path = None
        self._endline = "\n"
        self._prefix = "\t"
        self._delimiter = "\t"
        self._convert_date = False

        self._read_config()

    def read_xml(self, path, hide_empty=True):
        with open(path, encoding="utf-8") as xml_file:
            head = xml_file.readline()
            xml = xml_file.read()
            root = etree.fromstring(xml)
            for data in root.getchildren():

                for elem in data.getchildren():
                    self._read_element(elem, hide_empty=hide_empty)

    def _read_element(self, element, sign="", hide_empty=True):
        element_text = element.text

        if (hide_empty and not element_text or
                isinstance(element, lxml.etree._Comment) or
                isinstance(element, lxml.etree._ProcessingInstruction) or
                element.tag in self._hide_elements):
            pass
        elif element.tag.find("AKTION") > -1:
            num = int(element_text)
            print(sign, self._clean_xmlns(element.tag), self._delimiter, AktionsStatus.get_status(num), end=self._endline)
        elif self._convert_date and element.tag.find("NKZEIT") > -1:
            time = dt.datetime.strptime(element_text, "%H%M%S")
            uhrzeit = time.strftime("%H:%M:%S")
            print(sign, self._clean_xmlns(element.tag), self._delimiter, uhrzeit,
                  end=self._endline)
        elif self._convert_date and element.tag.find("NKDATUM") > -1:
            date = dt.datetime.strptime(element_text, "%Y%m%d")
            datum = date.strftime("%d.%m.%Y")
            print(sign, self._clean_xmlns(element.tag), self._delimiter, datum,
                  end=self._endline)
        else:
            print(sign, self._clean_xmlns(element.tag), self._delimiter, element.text if element.text else "", end=self._endline)
        if len(element.getchildren()) > 0:
            for el in element.getchildren():
                self._read_element(el, sign + self._prefix)

    def _clean_xmlns(self, tag_text):
        if tag_text and tag_text.startswith("{"):
            return tag_text.split("}")[1]
        return tag_text

    def _read_config(self):
        with open('config.json', 'r') as json_file:
            json_raw = json.load(json_file)
            self._path = json_raw.get('path')
            for element in json_raw.get('hide-elements'):
                self._hide_elements.append(element)
            endline = json_raw.get('endline')
            if endline:
                self._endline = endline
            prefix = json_raw.get('prefix')
            if prefix:
                self._prefix = prefix
            delimiter = json_raw.get('delimiter')
            if delimiter:
                self._delimiter = delimiter
            convert = json_raw.get('convert-date')
            if convert:
                self._convert_date = convert