from utilities import movement,check_moves
from DataModels.House import House
from DataModels.Container import Container
stack = []
def visit_cell(grid, available_movement, gc_moveset, depth=0):
    global stack
    possible_goals = []
    a = gc_moveset[-1][0]
    b = gc_moveset[-1][1]
    possible_goals.append([a+1,b])
    possible_goals.append([a-1,b])
    possible_goals.append([a,b+1])
    possible_goals.append([a,b-1])
    house_in_area = False
    for location in possible_goals:
        try:
            cell = grid[location[0]][location[1]]
            if(type(cell) == House and cell.container.is_full and cell.unvisited):
                cell.unvisited = False
                house_in_area = True
                break
        except:
            continue
    if(house_in_area):
        xy = gc_moveset[-1]
        gc_moveset.append("pick_garbage")
        return (xy, gc_moveset)

    if len(available_movement) == 0 or depth>30:
        return
    x,y = gc_moveset[-1]
    for direction in available_movement:
        x_next, y_next = movement(grid,x,y)[0][direction]
        available_movement_next = check_moves(grid, x_next,y_next,direction)
        gc_moveset_next = gc_moveset.copy()
        gc_moveset_next.append([x_next,y_next])
        stack.append([grid, available_movement_next, gc_moveset_next, depth+1])

def DFS(grid, available_movement, gc_moveset, depth=0):
    global stack
    stack.append([grid, available_movement, gc_moveset, 0])
    while not len(stack)==0:
        state = stack.pop()
        result = visit_cell(state[0], state[1], state[2],state[3])
        if result!= None:
            return result