using RecrownedAthenaeum.Assets;
using RecrownedAthenaeum.Render;
using RecrownedAthenaeum.UI.Modular;
using RecrownedAthenaeum.UI.SkinSystem;

namespace RecrownedAthenaeum.UI.BookSystem
{
    /// <summary>
    /// A page a part of a <see cref="Book"/>.
    /// </summary>
    public class Page : UIModuleGroup
    {
        private readonly int pageX, pageY;
        /// <summary>
        /// Whether or not this book needs to be refreshed with new dimensions.
        /// </summary>
        public bool requiresSizeUpdate;

        /// <summary>
        /// Constructs a page.
        /// </summary>
        /// <param name="pageX">The X position in the book.</param>
        /// <param name="pageY">The Y position in the book.</param>
        public Page(int pageX, int pageY) : base()
        {
            this.pageX = pageX;
            this.pageY = pageY;
            requiresSizeUpdate = true;
            name = ToString();
        }

        /// <summary>
        /// Called when this page is flagged as needing a size update.
        /// </summary>
        /// <param name="width">New width.</param>
        /// <param name="height">New Height</param>
        public virtual void ApplySize(int width, int height)
        {
            X = pageX * width;
            Y = pageY * height;
            Width = width;
            Height = height;
            requiresSizeUpdate = false;
        }

        /// <summary>
        /// Called only once after a page is added to a <see cref="Book"/>. Generally used to instantiate the modules of the page.
        /// </summary>
        /// <param name="assets">The assets to be used during initialization passed by the book this page belongs to.</param>
        /// <param name="skin">The skin the book containing this page is given that can be used by this page.</param>
        /// <param name="basicScissor">The scissor box to use for cropping.</param>
        protected internal virtual void Initialize(AssetManager assets, ISkin skin, BasicScissor basicScissor)
        {
            this.basicScissor = basicScissor;
        }
    }
}