from nullptr.missions.base import BaseMission, MissionParam
from nullptr.models.waypoint import Waypoint

class SiphonMission(BaseMission):
  def start_state(self):
    return 'travel-to'
    
  @classmethod
  def params(cls):
    return {
      'site': MissionParam(Waypoint, True),
    }
  
  def step_siphon(self):
    result = self.api.siphon(self.ship)
    self.next_step = self.ship.cooldown
    if self.ship.cargo_space() > 5:
      return 'more'
    else:
      return 'full'
      
  def find_hauler(self, r):
    for s in self.store.all('Ship'):
      if s.mission != 'haul': continue
      if s.location != self.ship.location:
        continue
      if s.mission_status != 'load':
        continue
      if r not in s.mission_state['resources']: continue
      return s
    return None
      
  def step_unload(self):
    if len(self.ship.cargo) == 0:
      return 'done'
    r = list(self.ship.cargo.keys())[0]
    amt = self.ship.cargo[r]
    h = self.find_hauler(r)
    if h is None:
      self.api.jettison(self.ship, r)
    else:
      space = h.cargo_space()
      amt = min(space, amt)
      if amt > 0:
        self.api.transfer(self.ship, h, r, amt)
    return 'more'
    
  def steps(self):
    return {
      **self.travel_steps('to', 'site', 'siphon'),
        'siphon': (self.step_siphon, {
            'more': 'siphon',
            'full': 'unload'
        }),
        'unload': (self.step_unload, {
            'more': 'unload',
            'done': 'done'
        })
    }