local awful = require("awful")
local watch = require("awful.widget.watch")
local wibox = require("wibox")

local ramgraph_widget = wibox.widget {
    border_width = 0,
    colors = {
        '#74aeab', '#26403f'
    },
    display_labels = false,
    forced_width = 25,
    widget = wibox.widget.piechart
}

local total, used, free, shared, buff_cache, available

watch('bash -c "free | grep Mem"', 1,
    function(widget, stdout, stderr, exitreason, exitcode)
        total, used, free, shared, buff_cache, available = stdout:match('(%d+)%s*(%d+)%s*(%d+)%s*(%d+)%s*(%d+)%s*(%d+)')

        widget.data = {used, total-used}
    end,
    ramgraph_widget
)

local w = wibox {
    height = 200,
    width = 350,
    ontop = true,
    screen = mouse.screen,
    expand = true,
    bg = '#1e252c',
    max_widget_size = 500
}

w:setup {
    border_width = 0,
    colors = {
        '#74aeab',
        '#6eaaa7',
        '#5ea19d',
        '#55918e',
        '#4b817e',
    },
    display_labels = false,
    forced_width = 25,
    id = 'pie',
    widget = wibox.widget.piechart
}

ramgraph_widget:buttons(
    awful.util.table.join(
        awful.button({}, 1, function()
            awful.placement.top_right(w, { margins = {top = 25, right = 10}})
            w.pie.data_list = {
                {'used' , used},
                {'free' , free},
                {'shared' , shared},
                {'buff_cache' , buff_cache},
                {'available' , available
                }
            }
            w.pie.display_labels = true
            w.visible = true
        end),
        awful.button({}, 3, function()
            w.visible = false;
        end)
    )
)

return ramgraph_widget