-- Provides:
-- evil::volume
--      volume
--      muted
local awful = require("awful")

local volume_old = -1
local muted_old = -1
local function emit()
	-- Requires wireplumber
	awful.spawn.easy_async_with_shell("wpctl get-volume @DEFAULT_AUDIO_SINK@", function(out)
		local volume = tonumber(string.match(out:match("(%d%.%d+)") * 100, "(%d+)"))
		local muted = out:match("MUTED")

		local icon = ""
		if muted or volume == 0 then
			icon = "󰝟"
		elseif volume <= 33 then
			icon = "󰕿"
		elseif volume <= 66 then
			icon = "󰖀"
		elseif volume <= 100 then
			icon = "󰕾"
		else
			icon = ""
		end

		if volume ~= volume_old or muted ~= muted_old then
			awesome.emit_signal("evil::volume", volume, muted, icon)
			volume_old = volume
			muted_old = muted
		end
	end)
end

-- Run once to initialize widgets
emit()

-- Subscribe to pactl changes
local subscribe = [[ bash -c "LANG=C pactl subscribe 2> /dev/null | grep --line-buffered \"Event 'change' on sink\"" ]]

-- Kill old pactl processes
awful.spawn.easy_async({ "pkill", "--full", "--uid", os.getenv("USER"), "^pactl subscribe" }, function()
	awful.spawn.with_line_callback(subscribe, {
		stdout = function()
			emit()
		end,
	})
end)