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

local dock = require("widgets.dock.dock")

local width = 68
local openerWidth = 8
local height = 376

local dock_container = wibox({
    visible = true, 
    ontop = true,
    type = "dock", 
    screen = screen.primary, 
    x = 0, 
    y = beautiful.bar_height + (awful.screen.focused().geometry.height - height - beautiful.bar_height) / 2,
    width = dpi(width + openerWidth), 
    height = dpi(height),
    bg = "#00000000"
})

local dock_opener = wibox.widget {
    bg = beautiful.bg_normal,
    forced_width = dpi(openerWidth),
    input_passthrough = true,
    bg = "#00000000",
    widget = wibox.container.background
}

local mouse_in_dock = false

local get_fullscreen = function()
    tag = awful.screen.focused().selected_tag

    for _, client in pairs(tag:clients()) do
        if client.fullscreen then
            return true
        end
    end

    return false
end

local get_auto_hide = function(tag)
    if tag == nil then tag = awful.screen.focused().selected_tag end

    -- auto hiding if any client on the current tag overlaps the dock
    for _, client in pairs(tag:clients()) do
        if client.x < width then
            return true
        end
    end

    return false
end

local show_cb = function()
    if not mouse_in_dock and get_auto_hide() then return false end

    local delta = 2

    if dock_container.x < 0 then
        dock_container.x = dock_container.x + delta
        return true
    else
        return false 
    end
end

local hide_cb = function()
    if mouse_in_dock or not get_auto_hide() then return false end

    local delta = 2

    if dock_container.x > -width then
        dock_container.x = dock_container.x - delta
        return true
    else
        return false
    end
end

local show = function()
    gears.timer.start_new(0.002, show_cb)
end

local hide = function()
    gears.timer.start_new(0.002, hide_cb)
end

dock_opener:connect_signal("mouse::enter", function()
    if get_fullscreen() then return end

    mouse_in_dock = true
    show()
end)
dock_opener:connect_signal("mouse::leave", function()
    mouse_in_dock = false
    hide()
end)

dock:connect_signal("mouse::leave", function() 
    mouse_in_dock = false
    hide()
end)

dock:connect_signal("mouse::enter", function()
    mouse_in_dock = true
    show()
end)

local update = function(tag)
    if tag == nil then
        tag = awful.screen.focused().selected_tag
    end

    if get_auto_hide(tag) and not mouse_in_dock then
        hide() 
    else 
        show()
    end
end

client.connect_signal("manage", function() update() end)
client.connect_signal("unmanage", function() update() end)
client.connect_signal("property::size", function() update() end)
client.connect_signal("property::position", function() update() end)
client.connect_signal("tagged", function() update() end)
tag.connect_signal("property::layout", function(t) update(t) end)
tag.connect_signal("property::selected", function(t) update(t) end)

dock_container:setup {
    dock, 
    dock_opener,
    layout = wibox.layout.fixed.horizontal
}

update()