#!/usr/bin/python
# -*- coding: utf-8 -*-

# Copyright (C) René 'Necoro' Neumann

#
# Some helper functions for managing workspaces in i3.
#

import sys
from os.path import realpath, dirname, join

cwd = realpath(dirname(__file__))
sys.path.insert(1, join(cwd, "libs"))

import i3
import sh
from functools import partial

DEFAULT = "switch"

switch = i3.workspace
move   = partial(i3.move, "container to workspace")

def new_ws(cmd):
    """Create a new workspace by using the first free number > 0."""
    nums = (w["num"] for w in i3.get_workspaces())
    nums = filter(lambda n: n is not None and n >= 0, nums)

    for i,n in enumerate(sorted(nums)):
        if i != n:
            cmd(str(i))
            break
    else:
        cmd(str(i+1))

def to_ws(cmd, prompt):
    """Use `dmenu` to switch or move to a workspace."""
    ws = sorted(w["name"] for w in i3.get_workspaces())

    try:
        sel = (sh.dmenu("-b", _in = "\n".join(ws), p=prompt).strip() or None)
    except sh.ErrorReturnCode:
        sel = None

    if sel is not None:
        cmd(sel)

if __name__ == "__main__":
    try:
        arg = sys.argv[1]
    except IndexError:
        arg = DEFAULT

    if arg == "switch":
        to_ws(switch, "Switch to:")
    elif arg == "move":
        to_ws(move, "Move to:")
    elif arg == "new":
        new_ws(switch)
    elif arg == "move_new":
        new_ws(move)
    else:
        print("Unknown arg: %s" % arg)
        sys.exit(1)