import logging
import json
import requests

from html.parser import HTMLParser


def init(CONFIG, logger):
  logger.setLevel(logging.DEBUG)
  return Mod(CONFIG, logger)


class Mod:
  def __init__(self, CONFIG, logging):
    self.URL     = "https://www.e-license.jp/el25/pc/"
    self.CONFIG  = CONFIG

    self.logging = logging
    self.targets = []

    self.ss = self.authenticate()

  def cycle(self):
    res = self.ss.post(
      url  = self.URL+"p04a.action",
      data = {
        "b.processCd": "A",
        "b.kamokuCd" : 0,
        "b.page"     : 1,
        "b.schoolCd" : self.CONFIG["school"],
      })
    res.encoding = "shift_jis"

    parser = ReservationListParser()
    parser.feed(res.text)

    return

  def watch(self, date, slots):
    self.logging.debug("watch request accepted: {} {}".format(+date+slots))
    self.targets.append((date, slots))

  def authenticate(self):
    ss = requests.Session()
    try:
      res = ss.post(
        url  = self.URL+"p01a.action",
        data = {
          "b.studentId"    : self.CONFIG["username"],
          "b.password"     : self.CONFIG["password"],
          "b.schoolCd"     : self.CONFIG["school"],
          "b.processCd"    : "",
          "b.kamokuCd"     : "",
          "method:doLogin" : "ログイン".encode("shift_jis"),
        })
      self.logging.info("authenticated")
      return ss
    except Exception as e:
      self.logging.error("authentication failure ({})".format(e))
      return None


class ReservationListParser(HTMLParser):
  path = []

  def handle_starttag(self, tag, attrs):
    self.path.append(tag)

    c = [x[1] for x in attrs if x[0] == "class"]
    if len(c) == 0:
      return

    if tag == "td":
      print(c)
      return

  def handle_data(self, data):
    return

  def handle_endtag(self, tag):
    self.path.pop()