#!/usr/bin/python3

import sys
from i3ipc import Connection, Event


def find_parent(i3, window_id):
    """
        Find the parent of a given window id
    """

    def finder(con, parent):
        if con.id == window_id:
            return parent
        for node in con.nodes:
            res = finder(node, con)
            if res:
                return res
        return None

    return finder(i3.get_tree(), None)


def set_layout(i3):
    """
        Set the layout/split for the currently
        focused window to either vertical or
        horizontal, depending on its width/height
    """



    win = i3.get_tree().find_focused()
    parent = find_parent(i3, win.id)


    # We never want to set the layout of a single window container,
    # there are already keys for that. I don't know why i3 even does
    # this, it is stupid. So, eliminate single window container if we
    # are focused on one.
    #
    # Alternatively, it could first focus the parent, but I think when
    # layout changes, we expect new windows to be created within that
    # layout.
    if (parent and len(parent.nodes) == 1):
        gp = find_parent(i3, parent.id)
        if (gp.nodes[0].id == parent.id):
            if (gp.layout == 'splitv'):
                i3.command('move down')
            else: # splith or tabbed
                i3.command('move right')
        else:
            if (gp.layout == 'splitv'):
                i3.command('move up')
            else:
                i3.command('move left')
    i3.command('layout ' + sys.argv[1])

def main():
    i3 = Connection()
    set_layout(i3)


if __name__ == "__main__":
    main()