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using Microsoft.Xna.Framework;
using StardewValley;

namespace StardewModdingAPI.Framework
{
    /// <summary>Defines a position on a given map at different reference points.</summary>
    internal class CursorPosition : ICursorPosition
    {
        /*********
        ** Accessors
        *********/
        /// <inheritdoc />
        public Vector2 AbsolutePixels { get; }

        /// <inheritdoc />
        public Vector2 ScreenPixels { get; }

        /// <inheritdoc />
        public Vector2 Tile { get; }

        /// <inheritdoc />
        public Vector2 GrabTile { get; }


        /*********
        ** Public methods
        *********/
        /// <summary>Construct an instance.</summary>
        /// <param name="absolutePixels">The pixel position relative to the top-left corner of the in-game map, adjusted for zoom but not UI scaling.</param>
        /// <param name="screenPixels">The pixel position relative to the top-left corner of the visible screen, adjusted for zoom but not UI scaling.</param>
        /// <param name="tile">The tile position relative to the top-left corner of the map.</param>
        /// <param name="grabTile">The tile position that the game considers under the cursor for purposes of clicking actions.</param>
        public CursorPosition(Vector2 absolutePixels, Vector2 screenPixels, Vector2 tile, Vector2 grabTile)
        {
            this.AbsolutePixels = absolutePixels;
            this.ScreenPixels = screenPixels;
            this.Tile = tile;
            this.GrabTile = grabTile;
        }

        /// <inheritdoc />
        public bool Equals(ICursorPosition? other)
        {
            return other != null && this.AbsolutePixels == other.AbsolutePixels;
        }

        /// <inheritdoc />
        public Vector2 GetScaledAbsolutePixels()
        {
            return Game1.uiMode
                ? Utility.ModifyCoordinatesForUIScale(this.AbsolutePixels)
                : this.AbsolutePixels;
        }

        /// <inheritdoc />
        public Vector2 GetScaledScreenPixels()
        {
            return Game1.uiMode
                ? Utility.ModifyCoordinatesForUIScale(this.ScreenPixels)
                : this.ScreenPixels;
        }
    }
}