util.init_hosted()

local json = require "json"

local serial = sys.get_env "SERIAL"
local location = ""
local description = "<please wait>"
local upper_text = ""
local lower_text = ""
local size_multiplier = 1
local card = nil

util.data_mapper{
    ["device_info"] = function(info)
        info = json.decode(info)
        location = info.location
        description = info.description

        if location ~= nil and location ~= '' then
            upper_text = description .. " (" .. serial .. ")"
            lower_text = location
        else
            upper_text = description
            lower_text = serial
        end
    end
}

gl.setup(NATIVE_WIDTH, NATIVE_HEIGHT)

if NATIVE_WIDTH > 2000 then
    card = resource.load_image("testcard_3840.png")
    size_multiplier = 2
else
    card = resource.load_image("testcard_1920.png")
end

font = resource.load_font("vera.ttf")

function node.render()
    local render_width = 1920
    local render_height = 1080
    local upper_text_pos = 631
    local lower_text_pos = 679
    local upper_text_size = 40
    local lower_text_size = 20

    gl.clear(0,0,0,1)

    card:draw(0, 0, 1920*size_multiplier, 1080*size_multiplier)

    upper_width = font:width(upper_text, 40*size_multiplier)
    lower_width = font:width(lower_text, 20*size_multiplier)

    font:write(
        (render_width*size_multiplier/2)-(upper_width/2),
        upper_text_pos*size_multiplier,
        upper_text,
        40*size_multiplier,
        1,1,1,1)

    font:write(
        (render_width*size_multiplier/2)-(lower_width/2),
        lower_text_pos*size_multiplier,
        lower_text,
        20*size_multiplier,
        1,1,1,1)
end