local M = {}

local awful = require("awful")

-- mapping from logical screen indices to indices corresponding to their
-- physical layout
local function map_screen_physical(n)
    local function screen_cmp(s1, s2)
        return s1[2].geometry.x < s2[2].geometry.x
    end

    local screens = {}
    for s = 1, screen.count() do
        screens[s] = {s, screen[s]}
    end

    table.sort(screens, screen_cmp)

    if screens[n] ~= nil then
        return screens[n][2]
    end
    return nil
end

local function screen_focus_physical(n)
    local s = map_screen_physical(n)
    if s then
        awful.screen.focus(s)
    end
end

function M.screen_focus_physical(n) screen_focus_physical(n) end

-- audio control functions
local function vol_control(n)
    local cmd = string.format("amixer -q set Master %d%%", math.abs(n)) .. (n < 0 and "-" or "+")
    awful.util.spawn(cmd)
end

function M.vol_control(n) vol_control(n) end

return M