class Plato

    attr_accessor :name, :ingredients

    def initialize(name, &block_ingredientes)
        @name = name
        @ingredients = []

        if block_given?
            if block_ingredientes.arity == 1
                yield self
            else
                instance_eval(&block_ingredientes)
            end
        end

        @tablaAlimentos = [@huevo_frito = Comida.new("Huevo", 14.1, 0.0, 19.5),
            @leche_vaca = Comida.new("Leche vaca", 3.3, 4.8, 3.2),
            @Yogurt = Comida.new("Yogurt", 3.8, 4.9, 3.8),
            @cerdo = Comida.new("Cerdo", 21.5, 0.0, 6.3),
            @ternera = Comida.new("Ternera", 21.1, 0.0, 3.1),
            @pollo = Comida.new("Pollo", 20.6, 0.0, 5.6),
            @bacalao = Comida.new("Bacalao", 17.7, 0.0, 0.4),
            @atun = Comida.new("Atun", 21.5, 0.0, 15.5),
            @salmon = Comida.new("Salmon", 19.9, 0.0, 13.6),
            @aceite_oliva = Comida.new("Aceite de oliva", 0.0, 0.2, 99.6),
            @chocolate = Comida.new("Chocolate", 5.3, 47.0, 30.0),
            @azucar = Comida.new("Azucar", 0.0, 99.8, 0.0),
            @arroz = Comida.new("Arroz", 6.8, 77.7, 0.6),
            @lentejas = Comida.new("Lentejas", 23.5, 52.0, 1.4),
            @papas = Comida.new("Papas", 2.0, 15.4, 0.1),
            @tomate = Comida.new("Tomate", 1.0, 3.5, 0.2),
            @cebolla = Comida.new("Cebolla", 1.3, 5.8, 0.3),
            @platanos = Comida.new("Platano", 1.2, 21.4, 0.2),
            @manzana = Comida.new("Manzana", 0.3, 12.4, 0.4)]

        @tablaValores = [["2 piezas pequeñas", 20], ["1 taza", 10], ["1/2 cucharon", 7], ["1/2 cucharada", 5], ["1 pieza", 15]]
    end

    def to_s
        output = @name
        output << "\n#{'=' * @name.size}\n\n"

        output << "Composicion nutricional:\n"
        output << "#{' ' * 20}glucidos proteinas lipidos valor energetico\n"

        total = 0
        @ingredients.each do |n|
            buscador = "#{n.match(/[^.\(]*/)}"
            output << buscador
            cantidad = "#{n[/\(.*\)/]}"
            cantidad[0] = '' #Elimina el parentisis (
            cantidad[cantidad.length-1] = '' #Elimina el parentisis de la cantidad )

            valor = 0
            @tablaValores.collect do |n|
                n.each_with_index do |m, i|
                    if (cantidad == m.to_s)
                        valor = n[1]
                    end
                end
            end

            @tablaAlimentos.collect do |n|
                if (n.comida == buscador)
                    total += (n.valorEnergetico * valor)
                    output << "#{' ' * (20-buscador.size)}#{n.glucidos}         #{n.proteina}      #{n.lipidos}       #{n.valorEnergetico*valor}\n"
                end
            end
        end
        output << "Valor energetico total:                              #{total}"
        output
    end

    def vegetal(name, options = {})
        ingredient = name
        ingredient << "(#{options[:porcion]})" if options[:porcion]

        @ingredients << ingredient
    end

    def fruta(name, options = {})
        ingredient = name
        ingredient << "(#{options[:gramos]})" if options[:gramos]

        @ingredients << ingredient
    end

    def cereal(name, options = {})
        ingredient = name
        ingredient << "(#{options[:porcion]})" if options[:porcion]

        @ingredients << ingredient
    end

    def proteina(name, options = {})
        ingredient = name
        ingredient << "(#{options[:porcion]})" if options[:porcion]

        @ingredients << ingredient
    end

    def aceite(name, options = {})
        ingredient = name
        ingredient << "(#{options[:porcion]})" if options[:porcion]

        @ingredients << ingredient
    end
end