using System;

namespace OpenMacroBoard.SDK.Helper
{
    /// <summary>
    /// Extensions from <see cref="IKeyLayout"/>s.
    /// </summary>
    public static class KeyLayoutAreaHelperExtensions
    {
        /// <summary>
        /// Calculates a <see cref="OmbRectangle"/> which spans all keys from a given <see cref="IKeyLayout"/>.
        /// </summary>
        /// <param name="keyLayout">The key layout this area is calculated for.</param>
        /// <returns>Returns a rectangle that spans all keys.</returns>
        public static OmbRectangle GetFullArea(this IKeyLayout keyLayout)
        {
            var minX = 0;
            var minY = 0;
            var maxX = 0;
            var maxY = 0;

            foreach (var keyRect in keyLayout)
            {
                minX = Math.Min(minX, keyRect.Left);
                minY = Math.Min(minY, keyRect.Top);
                maxX = Math.Max(maxX, keyRect.Right);
                maxY = Math.Max(maxY, keyRect.Bottom);
            }

            return new OmbRectangle(minX, minY, maxX - minX, maxY - minY);
        }
    }
}