local awful = require('awful')
local gears = require('gears')
local beautiful = require('beautiful')
local dpi = require('beautiful').xresources.apply_dpi

local function renderClient(client, mode)
    if client.skip_decoration or (client.rendering_mode == mode) then
        return
    end

    client.rendering_mode = mode
    client.floating = false
    client.maximized = false
    client.above = false
    client.below = false
    client.ontop = false
    client.sticky = false
    client.maximized_horizontal = false
    client.maximized_vertical = false

    client.border_width = beautiful.border_width
    client.shape = function(cr, w, h)
        gears.shape.rectangle(cr, w, h)
    end
end

local changesOnScreenCalled = false

local function changesOnScreen(currentScreen)
    local tagIsMax = currentScreen.selected_tag ~= nil and currentScreen.selected_tag.layout == awful.layout.suit.max
    local clientsToManage = {}

    for _, client in pairs(currentScreen.clients) do
        if not client.skip_decoration and not client.hidden then
            table.insert(clientsToManage, client)
        end
    end

    if (tagIsMax or #clientsToManage == 1) then
        currentScreen.client_mode = 'maximized'
    else
        currentScreen.client_mode = 'tiled'
    end

    for _, client in pairs(clientsToManage) do
        renderClient(client, currentScreen.client_mode)
    end
    changesOnScreenCalled = false
end

function clientCallback(client)
    if not changesOnScreenCalled then
        if not client.skip_decoration and client.screen then
            changesOnScreenCalled = true
            local screen = client.screen
            gears.timer.delayed_call(function()
                changesOnScreen(screen)
            end)
        end
    end
end

function tagCallback(tag)
    if not changesOnScreenCalled then
        if tag.screen then
            changesOnScreenCalled = true
            local screen = tag.screen
            gears.timer.delayed_call(function()
                changesOnScreen(screen)
            end)
        end
    end
end

_G.client.connect_signal('manage', clientCallback)

_G.client.connect_signal('unmanage', clientCallback)

_G.client.connect_signal('property::hidden', clientCallback)

_G.client.connect_signal('property::minimized', clientCallback)

_G.client.connect_signal('property::fullscreen', function(c)
    if c.fullscreen then
        renderClient(c, 'maximized')
    else
        clientCallback(c)
    end
end)

_G.tag.connect_signal('property::selected', tagCallback)

_G.tag.connect_signal('property::layout', tagCallback)