local os = require('os')
naughty = require('naughty')
local wibox = require('wibox')
local awful = require('awful')
local gears = require('gears')
local json = require('json')

local home = os.getenv('HOME')
local todo_path = home .. '/.config/todo/todo.json'

function todo_list_widget(todo, s)

    local text = '\n    <b>' .. todo.title .. '</b>    \n'

    for key, item in pairs(todo.items) do
        text = text .. '        - ' .. item .. '        \n'
    end

    local text = wibox.widget {
        markup = text,
        align  = 'left',
        valign = 'top',
        font = "Ubuntu 18",
        widget = wibox.widget.textbox
    }

    local widget = wibox.widget.background(text, todo.color, function(cr, width, height)
        gears.shape.rounded_rect(cr, width, height, 20)
    end)

    widget.shape_border_width = 1
    widget.shape_border_color = "#ffffff"

    return widget

end

function add_background_widget(s)

    local f = io.open(todo_path, "rb")

    if f ~= nil then

        local content = f:read("*all")
        f:close()

        todo = json.parse(content)

        local margin = 25

        local l = wibox.layout {
            homogeneous   = true,
            spacing       = margin,
            forced_num_cols = 3,
            layout        = wibox.layout.grid,
        }

        l:set_orientation('horizontal')

        local widgets = {}

        for key, val in pairs(todo) do
            l:add(todo_list_widget(val, s))
        end

        background_widget = awful.wibar({
            screen = s,
            height = s.geometry.height,
            bg = "#00000000",
        })

        background_widget:setup {
            wibox.container.margin(l, margin, margin, margin, margin),
            layout = wibox.layout.manual
        }

        background_widget:struts({left=0, right=0, top=0, bottom=0})

    end

end