from Predicate import *
from zerolife.enum import Direction

class DirectionalTestPredicate(TestPredicate):
    '''compares the state of each direction to the direction of the desired state'''
    def holds(self, board, coordinates):
        for k, v in self.desiredState.items():
            print("Direction " + str(k))
            print("value " + str(v))
            print(board[coordinates[0]+k.x][coordinates[1]+k.y])
            if board[coordinates[0]+k.x][coordinates[1]+k.y].state != v:
                return False
        return True

    def __str__(self):
        '''This function looks like one line of unreadable nonsense. This is
        what happens:
        1. join the pairs of directions to states with a colon, making:
            direction:state
        2. join that list using spaces
        3. join DIRECTION, the result from 2, and some parenthesis
        '''
        return ''.join(["(DIRECTION ",\
        ' '.join((''.join([k.__str__(), ':', \
        v.__str__()]) for (k, v) in self.desiredState.items())), ")"])