using System;

namespace SortingVisualization.Algorithms {
    public class Gravitysort : SortingAlgorithm {
        public override string GetAlgorithmName() => "Gravitysort";

        public override void Sort(ref DataSet set) {
            Simulate(ref set);
            System.Console.WriteLine("Doing {0}...", this.GetAlgorithmName());
            int i, j, max, sum;
            byte[] beads;

            for (i = 1, max = set.ReadOperation(0); i < set.Size; ++i)
                if (set.ReadOperation(i) > max)
                    max = set.ReadOperation(i);

            beads = new byte[max * set.Size];

            for (i = 0; i < set.Size; ++i)
                for (j = 0; j < set.ReadOperation(i); ++j)
                    beads[i * max + j] = 1;

            for (j = 0; j < max; ++j) {
                for (sum = i = 0; i < set.Size; ++i) {
                    sum += beads[i * max + j];
                    beads[i * max + j] = 0;
                }

                for (i = set.Size - sum; i < set.Size; ++i)
                    beads[i * max + j] = 1;
            }

            for (i = 0; i < set.Size; ++i) {
                for (j = 0; j < max && Convert.ToBoolean(beads[i * max + j]); ++j)
                    ;
                set.WriteOperation(i, j);
            }
            System.Console.WriteLine("{0} complete!", this.GetAlgorithmName());
            if (!set.SimulateMode)
                set.FinalizeVideo();
        }
    }
}