import datetime

class Connection:
 def __init__(self, details = False):
  self.services = []
  self.details = details
  self.via = []

 def addService(self, service):
  self.services.append(service)

 def addVia(self, station):
  self.via.append(station)

 def depst(self):
  try:
   return self.services[0].depst
  except:
   return None

 def arrst(self):
  try:
   return self.services[-1].arrst
  except:
   return None

 def deptime(self):
  try:
   return self.services[0].deptime
  except:
   return None

 def arrtime(self):
  try:
   return self.services[-1].arrtime
  except:
   return None

 def currdep(self):
  try:
   return self.services[0].currdep
  except:
   return None

 def currarr(self):
  try:
   return self.services[-1].currarr
  except:
   return None

 def duration(self):
  try:
   return self.services[-1].arrtime - self.services[0].deptime
  except:
   return None

 def durationString(self):
  hrs, scs = divmod(self.duration().total_seconds(), 3600)
  mns, rmd = divmod(scs, 60)

  return "%i:%s" % (hrs, str(int(mns)).zfill(2))

 def changes(self):
  return max(len([service for service in self.services if service.name != "Walk"]) - 1, 0) if self.details else max(len([service for service in self.services[0].name.split("/") if service != "Walk"]) - 1, 0)

 def xml(self, indent = 0, cid = False, frm = True, to = True, deptime = True, arrtime = True, duration = True, changes = True, services = True, via = True servicekwargs = {}, stationkwargs = {}):
  out = " " * indent + "<connection%s>\n" % ("" if cid is False else " id=\"%i\"" % cid)

  if frm:
   out += " " * indent + " <from>\n"
   out += self.depst().xml(indent + 2, **stationkwargs) + "\n"
   out += " " * indent + " </from>\n"
  
  if via and self.via:
   out += " " * indent + " <via>\n"
   
   for vst in self.via:
    out += vst.xml(indent + 2, **stationkwargs) + "\n"

   out += " " * indent + " </via>\n"

  if to:
   out += " " * indent + " <to>\n"
   out += self.arrst().xml(indent + 2, **stationkwargs) + "\n"
   out += " " * indent + " </to>\n"

  if deptime or arrtime or duration or changes:
   out += " " * indent + " <details>\n"

   if deptime:
    out += " " * indent + "  <departure>\n"
    out += " " * indent + "   <date>%s</date>\n" % datetime.datetime.strftime(self.deptime(), "%d.%m.%Y")
    out += " " * indent + "   <time>%s</time>\n" % datetime.datetime.strftime(self.deptime(), "%H:%M")
    out += " " * indent + "  </departure>\n"

   if arrtime:
    out += " " * indent + "  <arrival>\n"
    out += " " * indent + "   <date>%s</date>\n" % datetime.datetime.strftime(self.arrtime(), "%d.%m.%Y")
    out += " " * indent + "   <time>%s</time>\n" % datetime.datetime.strftime(self.arrtime(), "%H:%M")
    out += " " * indent + "  </arrival>\n"

   out += (" " * indent + "  <duration>%s</duration>\n" % self.durationString()) if duration else ""
   out += (" " * indent + "  <changes>%i</changes>\n" % self.changes()) if changes else ""

   out += " " * indent + " </details>\n"

  if services:
   out += " " * indent + " <services>\n"

   for i in range(len(self.services)):
    out += self.services[i].xml(indent + 2, i, **servicekwargs) + "\n"

   out += " " * indent + " </services>\n"
  
  out += " " * indent + "</connection>"

  return out

 def json(self, indent = 0, cid = False, frm = True, to = True, deptime = True, arrtime = True, duration = True, changes = True, services = True, servicekwargs = {}, stationkwargs = {}):
  out = " " * indent + "{\n"

  out += (" " * indent + " \"@id\": %i,\n" % cid) if cid is not False else "" 

  if frm:
   out += " " * indent + " \"from\":\n"
   out += self.depst().json(indent + 2, **stationkwargs) + ",\n"

  if to:
   out += " " * indent + " \"to\":\n"
   out += self.arrst().json(indent + 2, **stationkwargs) + ",\n"

  if deptime or arrtime or duration or changes:
   det = ""
   det += " " * indent + " \"details\": {\n"

   if deptime:
    det += " " * indent + "  \"departure\": {\n"
    det += " " * indent + "   \"date\": \"%s\",\n" % datetime.datetime.strftime(self.deptime(), "%d.%m.%Y")
    det += " " * indent + "   \"time\": \"%s\"\n" % datetime.datetime.strftime(self.deptime(), "%H:%M")
    det += " " * indent + "  },\n"

   if arrtime:
    det += " " * indent + "  \"arrival\": {\n"
    det += " " * indent + "   \"date\": \"%s\",\n" % datetime.datetime.strftime(self.arrtime(), "%d.%m.%Y")
    det += " " * indent + "   \"time\": \"%s\"\n"% datetime.datetime.strftime(self.arrtime(), "%H:%M")
    det += " " * indent + "  },\n"

   det += (" " * indent + "  \"duration\": \"%s\",\n" % self.durationString()) if duration else ""
   det += (" " * indent + "  \"changes\": %i,\n" % self.changes()) if changes else ""

   det = "".join(det.rsplit(",", 1))
   out += det

   out += " " * indent + " },\n"

  if services:
   out += " " * indent + " \"services\": [\n"

   for i in range(len(self.services)):
    out += self.services[i].json(indent + 2, i, **servicekwargs) + (",\n" if not i == len(self.services) - 1 else "\n")

   out += " " * indent + " ],\n"

  out += " " * indent + "}"

  out = "".join(out.rsplit(",", 1))

  return out