namespace RyzStudio.Windows.ThemedForms
{
    using System;
    using System.ComponentModel;
    using System.Drawing;

    public partial class TButton : RyzStudio.Windows.ThemedForms.TUserControl
	{
        public class ButtonStyle
        {
            public Color BackColour { get; set; } = Color.Transparent;
            public Color PenColour { get; set; } = Color.Transparent;
            public Image ForeImage { get; set; } = null;
        }

        public enum ButtonState
        {
            Idle = 0,
            Hover,
            Down
        }

        protected ButtonState controlState = ButtonState.Idle;
        protected bool isSelected = false;

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

            label1.ImageAlign = ContentAlignment.MiddleCenter;

            this.StyleDefault = new ButtonStyle() { BackColour = Color.White, PenColour = Color.Black, ForeImage = this.DefaultImage };
            this.StyleDown = new ButtonStyle() { BackColour = Color.FromArgb(179, 179, 179), PenColour = Color.Black, ForeImage = this.DownImage };
            this.StyleOver = new ButtonStyle() { BackColour = Color.FromArgb(51, 51, 51), PenColour = Color.White, ForeImage = this.OverImage };
            this.StyleSelected = new ButtonStyle() { BackColour = Color.FromArgb(51, 51, 51), PenColour = Color.White, ForeImage = this.OverImage };

            label1.Click += delegate { this.OnClick(null); };
			label1.MouseEnter += delegate { this.VisualState = ButtonState.Hover; };
			label1.MouseLeave += delegate { this.VisualState = ButtonState.Idle; };
			label1.MouseDown += delegate { this.VisualState = ButtonState.Down; };
			label1.MouseUp += delegate { this.VisualState = ButtonState.Idle; };
		}

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

			this.VisualState = ButtonState.Idle;
        }

        protected ButtonState VisualState
		{
			get { return controlState; }
			set
			{
				switch (value)
				{
					case ButtonState.Idle:
						if (this.VisualState == ButtonState.Down)
						{
							updateButton(StyleOver);
						}
						else
						{
                            if (this.IsSelected)
                            {
                                updateButton(StyleSelected);
                            }
                            else
                            {
                                updateButton(StyleDefault);
                            }
                        }

						break;
					case ButtonState.Hover:
						updateButton(StyleOver);
						break;
					case ButtonState.Down:
						updateButton(StyleDown);
						break;
					default:
                        if (this.IsSelected)
                        {
                            updateButton(StyleSelected);
                        }
                        else
                        {
                            updateButton(StyleDefault);
                        }

                        break;
				}

				controlState = value;
			}
		}

		protected void updateButton(ButtonStyle style)
		{
			label1.ForeColor = style.PenColour;
			label1.BackColor = style.BackColour;
			label1.Image = style.ForeImage;
        }

        [Browsable(true)]
		[Category("Appearance")]
		public string LabelText { get => label1.Text; set => label1.Text = value; }

		[Browsable(true)]
		[Category("Appearance")]
		public Image OverImage { get; set; } = null;

		[Browsable(true)]
		[Category("Appearance")]
		public Image DownImage { get; set; } = null;

		[Browsable(true)]
		[Category("Appearance")]
		public Image DefaultImage { get; set; } = null;

        public bool IsSelected
        {
            get => isSelected;
            set
            {
                isSelected = value;

                this.VisualState = this.VisualState;
            }
        }

        protected ButtonStyle StyleOver { get; set; } = new ButtonStyle();
        protected ButtonStyle StyleDown { get; set; } = new ButtonStyle();
        protected ButtonStyle StyleDefault { get; set; } = new ButtonStyle();
        protected ButtonStyle StyleSelected { get; set; } = new ButtonStyle();

        public void PerformClick() => this.OnClick(null);
	}
}