using System;

using JetBrains.Annotations;

using SharpEngine.Core.Input;

using SharpEngine.Core.Manager;

using SharpEngine.Core.Math;

using SharpEngine.Core.Utils;

using SharpEngine.Core.Utils.EventArgs;

namespace SharpEngine.Core.Widget;

/// <summary>

/// Class which represents Slider

/// </summary>

/// <param name="position">Position</param>

/// <param name="size">Size (Vec2(150, 60))</param>

/// <param name="color">Color (Color.Green)</param>

/// <param name="value">Value (0)</param>

/// <param name="horizontal">Horizontal (true)</param>

/// <param name="zLayer">ZLayer (0)</param>

[UsedImplicitly]

public class Slider(

Vec2 position,

Vec2? size = null,

Color? color = null,

float value = 0,

bool horizontal = true,

int zLayer = 0

) : ProgressBar(position, size, color, value, horizontal, zLayer)

{

/// <summary>

/// Event trigger when the value is changed

/// </summary>

[UsedImplicitly]

public event EventHandler<ValueEventArgs<float>>? ValueChanged;

/// <inheritdoc />

public override void Update(float delta)

{

base.Update(delta);

if (!RealDisplayed || !InputManager.IsMouseButtonDown(MouseButton.Left)) return;

var finalPosition = RealPosition - Size / 2;

if (!InputManager.IsMouseInRectangle(new Rect(finalPosition, Size)))

return;

var barSize = Horizontal ? Size.X : Size.Y;

var point = Horizontal ? InputManager.GetMousePosition().X - finalPosition.X : InputManager.GetMousePosition().Y - finalPosition.Y;

var temp = Value;

Value = (int)System.Math.Round(point * 100 / barSize, MidpointRounding.AwayFromZero);

if (System.Math.Abs(temp - Value) > 0.001f)

{

ValueChanged?.Invoke(

this,

new ValueEventArgs<float> { OldValue = temp, NewValue = Value }

);

}

}

}