## Creature Project
## CSC323
## 4/17/10
## Instruction.py: Initializes and packs instructions for Species.

import Direction

class Instruction:
    """An instruction is basically just an object that tells the cell adjacent
       in the (given) direction to change to the (given) species."""
    def __init__(self, direction, species, coordinates=(0,0)):
        """The optional coordinates parameter is for the pack method."""
        self.direction = direction
        self.species = species
        self.coords = coordinates

    def pack(self, coordinates):
        """Packs an instruction object with the coordinates given.
        A packed instruction is just an instruction for the cell it is meant
        to change (current cell modified by direction of action). A packed
        instruction's direction should never be used, although I changed it to
        C (current cell) for purposes of logic."""
        self.coords = coordinates
        return Instruction(Direction.C, self.species,\
        (self.coords[0]+self.direction.x, self.coords[1]+self.direction.y))

    def __str__(self):
        """Returns the direction as a string."""
        s = "Direction =" + str(self.direction) + "Species = " + \
        str(self.species) + "Coords = (" + str(self.coords[0]) + ", " + \
        str(self.coords[1]) + ")"
        return s

    def save_the_instruction(self):
        """Saves the instruction as savedRule"""
        savedRule = "I(D:" + str(self.direction) + " S:" +str(self.species) + \
        " C:(" + str(self.coords[0]) + "," + str(self.coords[1]) + "))"
        return savedRule