using GeometryTD.CustomUtility;

namespace GeometryTD.UI
{
    public sealed partial class ShopFormController
    {
        private static ShopFormContext BuildContext(ShopFormRawData rawData)
        {
            GoodsItemContext[] goodsItemContexts = System.Array.Empty<GoodsItemContext>();
            if (rawData?.GoodsItems != null && rawData.GoodsItems.Count > 0)
            {
                goodsItemContexts = new GoodsItemContext[rawData.GoodsItems.Count];
                for (int i = 0; i < rawData.GoodsItems.Count; i++)
                {
                    GoodsItemRawData item = rawData.GoodsItems[i];
                    goodsItemContexts[i] = new GoodsItemContext
                    {
                        GoodsIndex = item?.GoodsIndex ?? i,
                        Title = item?.Title ?? string.Empty,
                        TypeText = item?.TypeText ?? string.Empty,
                        Description = BuildDescription(item),
                        TagTexts = BuildTagTexts(item),
                        PurchaseButtonText = item != null && item.IsPurchased ? "已购买" : $"购买 {item?.Price ?? 0}",
                        CanPurchase = item != null && !item.IsPurchased,
                        IconAreaContext = item?.IconAreaContext
                    };
                }
            }

            return new ShopFormContext
            {
                GoldText = $"金币: {rawData?.PlayerGold ?? 0}",
                GoodsItems = goodsItemContexts
            };
        }

        private static string BuildDescription(GoodsItemRawData rawData)
        {
            string baseDescription = rawData?.Description ?? string.Empty;
            string tagDescription = TagDisplayUtility.BuildTagDescriptionText(rawData?.Tags);
            if (string.IsNullOrWhiteSpace(tagDescription))
            {
                return baseDescription;
            }

            if (string.IsNullOrWhiteSpace(baseDescription))
            {
                return tagDescription;
            }

            return $"{baseDescription}\n{tagDescription}";
        }

        private static string[] BuildTagTexts(GoodsItemRawData rawData)
        {
            return TagDisplayUtility.BuildTagTexts(rawData?.Tags);
        }
    }
}