local awful = require("awful")
local wibox = require("wibox")
local beautiful = require("beautiful")
local apply_dpi = beautiful.xresources.apply_dpi
local pavolctld = require("lib.pavolctld")

-- return table
local widget = {}

widget.dbmeter = wibox.widget.textbox()
local slider = wibox.widget {
	bar_height = 0,
	widget = wibox.widget.slider,
	maximum = pavolctld.max_volume,
}
local progressbar = wibox.widget {
	max_value = pavolctld.max_volume,
	shape = beautiful.slider_bar_shape,
	bg = beautiful.slider_handle_color,
	widget = wibox.widget.progressbar,
}
widget.vslider = wibox.widget {
	{
		{
			progressbar,
			height = apply_dpi(3),
			widget = wibox.container.constraint
		},
		halign = "center",
		widget = wibox.container.place,
	},
	slider,
	layout = wibox.layout.stack,
}

-- scrollbox for default sink select
widget.defsink = wibox.widget.textbox()
local default_sink_scrollbox = wibox.widget {
	widget.defsink,
	step_function = wibox.container.scroll.step_functions.linear_increase,
	speed = apply_dpi(15),
	extra_space = apply_dpi(25), -- space between repetition
	pause = true, -- start paused
	widget = wibox.container.scroll.horizontal,
}

local muted = wibox.widget {
	color = "#222222",
	check_color = beautiful.border_focus,
	widget = wibox.widget.checkbox,
}

-- widget dropdown
local volume_dropdown = wibox.widget {
	{
		{
			{
				default_sink_scrollbox,
				margins = beautiful.margin_topbottom,
				widget = wibox.container.margin,
			},
			bg = "#333333",
			widget = wibox.container.background,
		},
		margins = beautiful.border_width,
		color = "#222222",
		widget = wibox.container.margin,
	},
	{
		{
			{
				text = "Mute:",
				widget = wibox.widget.textbox,
			},
			left = apply_dpi(10),
			right = apply_dpi(5),
			widget = wibox.container.margin,
		},
		{
			muted,
			fill_vertical = true,
			widget = wibox.container.place,
		},
		forced_width = apply_dpi(80),
		layout = wibox.layout.align.horizontal,
	},
	widget.vslider,
	{
		widget.dbmeter,
		forced_width = apply_dpi(80),
		halign = "right",
		widget = wibox.container.place,
	},
	forced_num_cols = 2,
	forced_num_rows = 2,
	homogeneous = false,
	expand = true,
	forced_width  = apply_dpi(300),
	forced_height = apply_dpi(60),
	layout = wibox.layout.grid,
}
widget.dropdown = awful.popup {
	widget = {
		volume_dropdown,
		left   = beautiful.margin_leftright,
		right  = beautiful.margin_leftright,
		top    = beautiful.margin_topbottom,
		bottom = beautiful.margin_topbottom,
		widget = wibox.container.margin,
	},
	border_color = beautiful.border_normal,
	border_width = beautiful.border_width,
	ontop        = true,
	hide_on_right_click = true,
	preferred_positions = "bottom",
	preferred_anchors   = "back",
	visible = false,
}

function widget.set_volume(vol, mute)
	progressbar:set_value(vol)
	muted.checked = mute
	if vol == slider.value then return end
	slider.value = vol
	if widget.dropdown.visible then
		slider:emit_signal("widget::redraw_needed")
	end
end

-- slider
slider:buttons(volume_buttons)
slider:connect_signal("property::value", function()
	if pavolctld.sinks.default.vol == slider.value then return end
	widget.dropdown.visible = true -- make sure widget isn't hidden
	pavolctld.volume_set(slider.value)
end)

-- scroll when hovering
default_sink_scrollbox:connect_signal("mouse::enter", function()
	default_sink_scrollbox:continue()
end)

default_sink_scrollbox:connect_signal("mouse::leave", function()
	default_sink_scrollbox:pause()
	default_sink_scrollbox:reset_scrolling()
end)

-- change sink
default_sink_scrollbox:connect_signal("button::press", function()
	widget.dropdown.visible = true -- make sure widget isn't hidden

	local g = mouse.current_widget_geometry
	local menugeo = {
		x = widget.dropdown.x + g.x - beautiful.margin_topbottom,
		y = widget.dropdown.y + g.y + g.height + beautiful.margin_topbottom + (beautiful.border_width * 2),
		width = g.width + beautiful.margin_topbottom * 2,
	}
	local menuopts = { items = {}, theme = menugeo }
	for i, s in pairs(pavolctld.sinks.sinks) do
		table.insert(menuopts.items, {
			s.desc,
			function() pavolctld.default_sink_set(i) end
		})
	end

	if widget._menu then widget._menu:hide() end
	widget._menu = awful.menu(menuopts):show({ coords = menugeo })
end)

-- mute button
muted:connect_signal("button::press", function()
	widget.dropdown.visible = true -- make sure widget isn't hidden
	pavolctld.mute_toggle()
end)

return widget