--   This file is part of Reno desktop.
--
--  Reno desktop is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
--
--  Reno desktop is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
--
--  You should have received a copy of the GNU General Public License along with Reno desktop. If not, see <https://www.gnu.org/licenses/>. 
-- Start button that summons the root menu or any other menu if needed
local awmtk2 = require("awmtk2")
local wibox = require("wibox")
local gears = require("gears")
local awful = require("awful")
local beautiful = require("beautiful")
local builder = require("builder")

return function(args)
    local popup
    do
        local style = awmtk2.create_style("startbutton",
            awmtk2.generic.popup,args.style)
        local templates = awmtk2.create_template_lib("startbutton",awmtk2.templates,args.templates)
        local t = awmtk2.build_templates(templates,style,args.vertical)
        local config_file = io.open(root_path.."/themes/"..global.theme.."/config/startbutton.lua","r")
        local config
        if config_file then
            config = config_file:read("*a")
            config_file:close()
        else
            config = [[{"list": [{"widget": "widgets.base.popuptitle","options":{"vertical":true}},{"widget":"widgets.start.xdgmenu"}]}]]
        end
        popup = awful.popup(t.popup({
            markup = "brainhurt 2",
            widget = wibox.widget.textbox
        }))
        popup.widget = wibox.widget(t.popup(builder(
            config,
            {
                style = style.base,
                screen = mouse.screen,
                passthrough = {
                    parent = popup
                }
            }
        )).widget)
        for _,layout in pairs(popup.widget:get_children_by_id("menu_root")) do
            for _,button in pairs(layout.children) do
                button:connect_signal("cascade::kill",function()
                    popup.visible = false
                end)
            end
        end
        popup:connect_signal("property::visible",function()
            local roots = popup.widget:get_children_by_id("menu_root")
            for k,v in pairs(roots) do
                for _,w in ipairs(v.children) do
                    w:emit_signal("cascade::close")
                end
            end
        end)
    end
    local style = awmtk2.create_style("startbutton",
        awmtk2.generic.iconified_widget,args.style)
    local templates = awmtk2.create_template_lib("startbutton",awmtk2.templates,args.templates)
    local t = awmtk2.build_templates(templates,style,args.vertical)
    local widget = wibox.widget(t.button(t.article({
        icon = style.article.icon,
        title = style.article.title or "Start"
    })))
    widget:connect_signal("button::press",style.button.onpress)
    widget:connect_signal("button::release",style.button.onrelease)
    widget:connect_signal("button::press",function()
        popup.visible = (not popup.visible)
        if popup.visible then
            local _, corner = awful.placement.closest_corner(
                mouse,
                {parent = mouse.screen,pretend = true}
            )
            if corner then
                (awful.placement[corner]+
                awful.placement.no_offscreen+
                awful.placement.no_overlap) (
                    popup,
                    {parent = mouse.screen}
                )
            end
        end
    end)
    return widget
end