using System;
using System.Drawing;
using System.Windows.Forms;

namespace RyzStudio.Windows.ThemedForms
{
	public partial class ProgressBarInner : System.Windows.Forms.UserControl
	{
		protected int minimum = 0;
		protected int maximum = 100;
		protected int value = 0;

		public ProgressBarInner() : base()
		{
			InitializeComponent();

			this.Padding = new Padding(0);
		}

		public int Minimum
		{
			get
			{
				return minimum;
			}
			set
			{
				if (this.InvokeRequired)
				{
					this.Invoke(new MethodInvoker(() => {
						setMinimum(value);
					}));
				}
				else
				{
					setMinimum(value);
				}
			}
		}

		public int Maximum
		{
			get
			{
				return maximum;
			}
			set
			{
				if (this.InvokeRequired)
				{
					this.Invoke(new MethodInvoker(() => {
						setMaximum(value);
					}));
				}
				else
				{
					setMaximum(value);
				}
			}
		}

		public int Value
		{
			get
			{
				return value;
			}
			set
			{
				if (this.InvokeRequired)
				{
					this.Invoke(new MethodInvoker(() => {
						setValue(value);
					}));
				}
				else
				{
					setValue(value);
				}
			}
		}

		public Color BarColour { get; set; } = Color.FromArgb(158, 225, 249);

		public Color BarTextColour
		{
			get => label3.ForeColor;
			set => label3.ForeColor = value;
		}

		protected override void OnPaint(PaintEventArgs e)
		{
			base.OnPaint(e);

			Rectangle canvas = this.DisplayRectangle;
			Graphics g = e.Graphics;

			if (this.Value > 0)
			{
				decimal result = decimal.Divide(canvas.Width, this.Maximum) * this.Value;

				canvas.Width = (int)Math.Round(result);

				g.FillRectangle(new SolidBrush(this.BarColour), canvas);
			}
		}

		protected void updateText()
		{
			if (label3.InvokeRequired)
			{
				label3.Invoke(new MethodInvoker(() =>
				{
					label3.Text = string.Format("{0}/{1}", this.Value.ToString(), this.Maximum.ToString());
				}));
			}
			else
			{
				label3.Text = string.Format("{0}/{1}", this.Value.ToString(), this.Maximum.ToString());
			}
		}

		protected void setMinimum(int value)
		{
			int m = value;
			if (m < 0)
			{
				m = 0;
			}

			if (m > this.Maximum)
			{
				m = this.Maximum;
			}

			if (this.Value < m)
			{
				this.Value = m;
			}

			if (this.value > this.Maximum)
			{
				this.value = this.Maximum;
			}

			minimum = m;
			updateText();
			this.Invalidate();
		}

		protected void setMaximum(int value)
		{
			int m = value;
			if (m < 0)
			{
				m = 0;
			}

			if (m < this.Minimum)
			{
				m = this.Minimum;
			}

			if (this.Value > m)
			{
				this.Value = m;
			}

			if (this.value < this.Minimum)
			{
				this.value = this.Minimum;
			}

			maximum = m;
			updateText();
			this.Invalidate();
		}

		protected void setValue(int value)
		{
			int m = value;
			if (m < this.Minimum)
			{
				m = this.Minimum;
			}

			if (m > this.Maximum)
			{
				m = this.Maximum;
			}

			this.value = m;
			updateText();
			this.Invalidate();
		}
	}
}