local ns = rgt

local achievements = {}
ns.achievements = achievements
local root_achievements = {}

function ns.register_achievement(def)
    if not def.label then
        def.label = def.name:gsub("_", " "):gsub("%s%a", function(a) return " "..string.upper(a) end)
    end
    if not def.depends then
        table.insert(root_achievements, def.name)
        def.depends = {}
    end
    achievements[def.name] = def
end

minetest.register_on_mods_loaded(function()
    table.sort(root_achievements)
    for id, def in pairs(achievements) do
        for _, dep in ipairs(def.depends) do
            local d_def = achievements[dep]
            if not d_def.children then d_def.children = {} end
            if d_def then
                table.insert(d_def.children, id)
            else
                minetest.log("error", "[rgt_achievements] Missing dependency '"..dep.."' for '"..id.."'")
            end
        end
    end
end)



function ns.show_achievements(name)
    local fs = [[
        formspec_version[10]
        size[12.5,10.5]
        scroll_container[0.25,0.25;12,11;blah;horizontal;;]
        scroll_container[0.25,0.25;12,10;blah2;vertical;;]
    ]]
    
    for i, x in ipairs(root_achievements) do
        fs = fs.."image[0,"..(i *0.5)..";0.25,0.25;rgt_stone.png]"
    end
        
    fs = fs..[[
        scroll_container_end[]
        scroll_container_end[]
        scrollbaroptions[min=0;max=256]
        scrollbar[0,0;-800,0;horizontal;blah;]
        scrollbar[0,0;-800,0;vertical;blah2;]
    ]]
    
    minetest.show_formspec(name, "achievements", fs)
end



ns.register_achievement {
    name = "survival",
}

ns.register_achievement {
    name = "machines",
}

minetest.register_chatcommand("a", {
    func = function(name)
        ns.show_achievements(name)
    end
})