public class Inventory {
    private Item[] items;

    public Inventory(Item[] items) {
        super();
        this.items = items;
    }

    public Inventory() {
        super();
        items = new Item[] {
                    new Item("+5 Dexterity Vest", 10, 20), 
                    new Item("Aged Brie", 2, 0),
                    new Item("Elixir of the Mongoose", 5, 7),
                    new Item("Sulfuras, Hand of Ragnaros", 0, 80),
                    new Item("Backstage passes to a TAFKAL80ETC concert", 15, 20),
                    new Item("Conjured Mana Cake", 3, 6) 
                };

    }

    public void updateQuality() {
        for (int i = 0; i < items.length; i++) {
            if (items[i].getName() != "Aged Brie"
                    && items[i].getName() != "Backstage passes to a TAFKAL80ETC concert") {
                if (items[i].getQuality() > 0) {
                    if (items[i].getName() != "Sulfuras, Hand of Ragnaros") {
                        items[i].setQuality(items[i].getQuality() - 1);
                    }
                }
            } else {
                if (items[i].getQuality() < 50) {
                    items[i].setQuality(items[i].getQuality() + 1);

                    if (items[i].getName() == "Backstage passes to a TAFKAL80ETC concert") {
                        if (items[i].getSellIn() < 11) {
                            if (items[i].getQuality() < 50) {
                                items[i].setQuality(items[i].getQuality() + 1);
                            }
                        }

                        if (items[i].getSellIn() < 6) {
                            if (items[i].getQuality() < 50) {
                                items[i].setQuality(items[i].getQuality() + 1);
                            }
                        }
                    }
                }
            }

            if (items[i].getName() != "Sulfuras, Hand of Ragnaros") {
                items[i].setSellIn(items[i].getSellIn() - 1);
            }

            if (items[i].getSellIn() < 0) {
                if (items[i].getName() != "Aged Brie") {
                    if (items[i].getName() != "Backstage passes to a TAFKAL80ETC concert") {
                        if (items[i].getQuality() > 0) {
                            if (items[i].getName() != "Sulfuras, Hand of Ragnaros") {
                                items[i].setQuality(items[i].getQuality() - 1);
                            }
                        }
                    } else {
                        items[i].setQuality(items[i].getQuality()
                                - items[i].getQuality());
                    }
                } else {
                    if (items[i].getQuality() < 50) {
                        items[i].setQuality(items[i].getQuality() + 1);
                    }
                }
            }
        }
}
}