namespace Knowledge
{
    /* Knowledge Utility Functions */

    void Print (std::string Conclusion)
    {
        std::cout << Conclusion << '\n';
    }

    void PrintData (std::string Key = "", std::string Value = "")
    {
        Print("  \"" + Key + "\": \"" + Value + "\",");
    }

    bool StartsWith (std::string Argument, std::string Prefix)
    {
        if(Argument.substr(0, Prefix.size()) == Prefix)
             return true;
        else return false;
    }

    std::string Extract (std::string Characters, int Length)
    {
        Characters = Characters.substr(Length);
        if (Characters[0] == ' ')
            Characters = Characters.substr(1);
        return Characters;
    }

    /* Knowledge Intelligent Agents */

    namespace Nutrition
    {
        void Notion ()
        {
            Print("{");
            PrintData("1", "Knowledge://Knowledge:80/%Notion=Nutrition Notion");
            PrintData("1", "Knowledge://Knowledge:80/%Notion=Nutrition Facts %Food");
            Print("}");
        }

        void Facts (std::string Food)
        {
            Print("{");
            PrintData("Facts.Name", Food);
            PrintData("Facts.Kcal", "200");
            PrintData("Facts.SFat", "20%");
            PrintData("Facts.TFat", "20%");
            PrintData("Facts.Salt", "10%");
            PrintData("Facts.Carbs", "8g");
            PrintData("Facts.Fiber", "8g");
            PrintData("Facts.Sugar", "2g");
            PrintData("Facts.Vitamins.A", "1%");
            PrintData("Facts.Vitamins.C", "1%");
            PrintData("Facts.Vitamins.E", "1%");
            Print("}");
        }
    }

    void Notion ()
    {
        Print("{");
        PrintData("1", "Knowledge://Knowledge:80/%Notion=Knowledge Notion");
        Print("}");
    }

    void Interpret (std::string Notion)
    {
        if (Notion == "Knowledge Notion")
            Knowledge::Notion();

        else if (Notion == "Nutrition Notion")
            Nutrition::Notion();
        else if (StartsWith(Notion, "Nutrition Facts"))
            Nutrition::Facts(Extract(Notion, 15));

        else
        {
            Print("{");
            PrintData("String.Length", "1");
            PrintData("String.Values", "['0']");
            PrintData("String.Counts", "['0']");
            Print("}");
        }
    }
}