using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Terminal.Gui.TextEffects;

/// <summary>
/// Implementation of <see cref="IFill"/> that uses a color gradient (including
/// radial, diagonal etc).
/// </summary>
public class GradientFill : IFill
{
    private Dictionary<Point, Terminal.Gui.Color> _map;

    public GradientFill (Rectangle area, Gradient gradient, Gradient.Direction direction)
    {
        _map =
            gradient.BuildCoordinateColorMapping (area.Height, area.Width, direction)
            .ToDictionary (
                (k) => new Point (k.Key.Column, k.Key.Row),
                (v) => new Terminal.Gui.Color (v.Value.R, v.Value.G, v.Value.B));
    }

    public Terminal.Gui.Color GetColor (Point point)
    {
        if (_map.TryGetValue (point, out var color))
        {
            return color;
        }
        return new Terminal.Gui.Color (0, 0, 0); // Default to black if point not found
    }
}