local astal = require("astal")
local Widget = require("astal.gtk3").Widget
local Gtk = require("astal.gtk3").Gtk
local Variable = require("astal").Variable
local Notifd = astal.require("AstalNotifd")
local lib = require("lib")
local bind = astal.bind
local timeout = astal.timeout

local TIMEOUT_DELAY = 5000

local notifd = Notifd.get_default()
local notif_map = lib.varmap({})

function Header(notif)
	local icon = lib.value_or(notif.app_icon, notif.desktop_entry)

	return Widget.Box({
		class_name = "header",
		lib.is_true(icon) and Widget.Icon({
			class_name = "app-icon",
			icon = icon,
		}),
		Widget.Label({
			class_name = "app-name",
			halign = "START",
			ellipsize = "END",
			label = notif.app_name or "",
		}),
		Widget.Label({
			class_name = "time",
			hexpand = true,
			halign = "END",
			label = lib.time({ time = notif.time }),
		}),
		Widget.Button({
			on_clicked = function() notif:dismiss() end,
			Widget.Icon({ icon = "window-close-symbolic" }),
		}),
	})
end

function Content(notif)
	return Widget.Box({
		class_name = "content",
		(notif.image and lib.file_exists(notif.image)) and Widget.Box({
			valign = "START",
			class_name = "image",
			css = string.format("background-image: url('%s')", notif.image),
		}),
		(notif.image and lib.is_icon(notif.image)) and Widget.Box({
			valign = "START",
			class_name = "icon-image",
			Widget.Icon({
				icon = notif.image,
				hexpand = true,
				vexpand = true,
				halign = "CENTER",
				valign = "CENTER",
			}),
		}),
		Widget.Box({
			vertical = true,
			Widget.Label({
				class_name = "summary",
				halign = "START",
				xalign = 0,
				ellipsize = "END",
				label = notif.summary,
			}),
			Widget.Label({
				class_name = "body",
				wrap = true,
				use_markup = true,
				halign = "START",
				xalign = 0,
				justify = "FILL",
				label = notif.body,
			}),
		}),
	})
end

function Notification(notif, id)

	local function destroy()
		notif_map.delete(notif.id)
	end

	local function setup()
		timeout(TIMEOUT_DELAY, destroy)
	end

	return Widget.EventBox({
		class_name = "notification",
		setup = setup,
		on_hover_lost = destroy,
		Widget.Box({
			vertical = true,
			Header(notif),
			Gtk.Separator({ visible = true }),
			Content(notif),
		}),
	})
end

notifd.on_notified = function(_, id)
	local notif = notifd:get_notification(id)
	notif_map.set(id, Notification(notif, id))
end

notifd.on_resolved = function(_, id)
	notif_map.delete(id)
end

return function()
	return bind(notif_map())
end