import json
from tank import Tank

configfile = "config.json"


class App:

    def __init__(self):
        self._tanks = []
        self._refuel_max = None
        self._refuel_goal = None
        self.load_preferences()
        self.calculate_refuel()

    def load_preferences(self):
        with open(configfile, 'r') as json_file:
            json_row = json.load(json_file)
            for t in json_row['tanks']:
                tank = Tank(t['name'], t['total'], t['actual'], t['dead'])
                self._tanks.append(tank)
            self._refuel_max = json_row["refuel"]["max"]
            self._refuel_goal = json_row["refuel"]["goal"]

    def calculate_refuel(self):
        total_empty_space = 0
        for tank in self._tanks:
            total_empty_space += tank.refuel_volume
        print("total empty space: ", total_empty_space)
        if total_empty_space < self._refuel_max:
            print("total empty space is lower as refuel")
            return
        elif self._refuel_max > total_empty_space - self._refuel_goal:
            print("maybe is empty space to low")
            return
        else:
            # todo: formel ausdenken
            portion = self._refuel_max // len(self._tanks)
            print("portion", portion)
            portion_ok = True
            for tank in self._tanks:
                if tank.refuel_volume < portion:
                    print("tank ", tank.name, " empty space is to low")
                    portion_ok = False
            if portion_ok:
                print("portion is ok")

    @property
    def tanks(self):
        return self._tanks

    def refuel(self, tank: Tank, portion):
        """ just to test """
        tank.refuel_volume()