// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System.ComponentModel;
using Point = System.Drawing.Point;
using Size = System.Drawing.Size;

namespace System.Windows.Forms.Tests;

public class VScrollBarTests
{
    [WinFormsFact]
    public void VScrollBar_Ctor_Default()
    {
        using SubVScrollBar control = new();
        Assert.Null(control.AccessibleDefaultActionDescription);
        Assert.Null(control.AccessibleDescription);
        Assert.Null(control.AccessibleName);
        Assert.Equal(AccessibleRole.Default, control.AccessibleRole);
        Assert.False(control.AllowDrop);
        Assert.Equal(AnchorStyles.Top | AnchorStyles.Left, control.Anchor);
        Assert.False(control.AutoSize);
        Assert.Equal(Control.DefaultBackColor, control.BackColor);
        Assert.Null(control.BackgroundImage);
        Assert.Equal(ImageLayout.Tile, control.BackgroundImageLayout);
        Assert.Null(control.BindingContext);
        Assert.Equal(0, control.Bounds.X);
        Assert.Equal(0, control.Bounds.Y);
        Assert.True(control.Bounds.Width > 0);
        Assert.True(control.Bounds.Height > 0);
        Assert.True(control.Bottom > 0);
        Assert.False(control.CanEnableIme);
        Assert.False(control.CanFocus);
        Assert.True(control.CanRaiseEvents);
        Assert.True(control.CanSelect);
        Assert.False(control.Capture);
        Assert.True(control.CausesValidation);
        Assert.Equal(0, control.ClientRectangle.X);
        Assert.Equal(0, control.ClientRectangle.Y);
        Assert.True(control.ClientRectangle.Width > 0);
        Assert.True(control.ClientRectangle.Height > 0);
        Assert.True(control.ClientSize.Width > 0);
        Assert.True(control.ClientSize.Height > 0);
        Assert.Null(control.Container);
        Assert.False(control.ContainsFocus);
        Assert.Null(control.ContextMenuStrip);
        Assert.Empty(control.Controls);
        Assert.Same(control.Controls, control.Controls);
        Assert.False(control.Created);
        Assert.Same(Cursors.Default, control.Cursor);
        Assert.Same(Cursors.Default, control.DefaultCursor);
        Assert.Equal(ImeMode.Disable, control.DefaultImeMode);
        Assert.Equal(Padding.Empty, control.DefaultMargin);
        Assert.Equal(Size.Empty, control.DefaultMaximumSize);
        Assert.Equal(Size.Empty, control.DefaultMinimumSize);
        Assert.Equal(Padding.Empty, control.DefaultPadding);
        Assert.True(control.DefaultSize.Width > 0);
        Assert.True(control.DefaultSize.Height > 0);
        Assert.False(control.DesignMode);
        Assert.Equal(0, control.DisplayRectangle.X);
        Assert.Equal(0, control.DisplayRectangle.Y);
        Assert.True(control.DisplayRectangle.Width > 0);
        Assert.True(control.DisplayRectangle.Height > 0);
        Assert.Equal(DockStyle.None, control.Dock);
        Assert.False(control.DoubleBuffered);
        Assert.True(control.Enabled);
        Assert.NotNull(control.Events);
        Assert.Same(control.Events, control.Events);
        Assert.False(control.Focused);
        Assert.Equal(Control.DefaultFont, control.Font);
        Assert.Equal(control.Font.Height, control.FontHeight);
        Assert.Equal(Control.DefaultForeColor, control.ForeColor);
        Assert.False(control.HasChildren);
        Assert.True(control.Height > 0);
        Assert.Equal(ImeMode.Disable, control.ImeMode);
        Assert.Equal(ImeMode.Disable, control.ImeModeBase);
        Assert.False(control.IsAccessible);
        Assert.False(control.IsMirrored);
        Assert.Equal(10, control.LargeChange);
        Assert.NotNull(control.LayoutEngine);
        Assert.Same(control.LayoutEngine, control.LayoutEngine);
        Assert.Equal(0, control.Left);
        Assert.Equal(Point.Empty, control.Location);
        Assert.Equal(Padding.Empty, control.Margin);
        Assert.Equal(100, control.Maximum);
        Assert.Equal(Size.Empty, control.MaximumSize);
        Assert.Equal(0, control.Minimum);
        Assert.Equal(Size.Empty, control.MinimumSize);
        Assert.Equal(Padding.Empty, control.Padding);
        Assert.Null(control.Parent);
        Assert.True(control.PreferredSize.Width > 0);
        Assert.True(control.PreferredSize.Height > 0);
        Assert.Equal("Microsoft\u00AE .NET", control.ProductName);
        Assert.False(control.RecreatingHandle);
        Assert.Null(control.Region);
        Assert.False(control.ResizeRedraw);
        Assert.True(control.Right > 0);
        Assert.Equal(RightToLeft.No, control.RightToLeft);
        Assert.True(control.ScaleScrollBarForDpiChange);
        Assert.True(control.ShowFocusCues);
        Assert.True(control.ShowKeyboardCues);
        Assert.Null(control.Site);
        Assert.True(control.Size.Width > 0);
        Assert.True(control.Size.Height > 0);
        Assert.Equal(1, control.SmallChange);
        Assert.Equal(0, control.TabIndex);
        Assert.False(control.TabStop);
        Assert.Empty(control.Text);
        Assert.Equal(0, control.Top);
        Assert.Null(control.TopLevelControl);
        Assert.False(control.UseWaitCursor);
        Assert.Equal(0, control.Value);
        Assert.True(control.Visible);
        Assert.True(control.Width > 0);

        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void VScrollBar_CreateParams_GetDefault_ReturnsExpected()
    {
        using SubVScrollBar control = new();
        CreateParams createParams = control.CreateParams;
        Assert.Null(createParams.Caption);
        Assert.Equal("ScrollBar", createParams.ClassName);
        Assert.Equal(0x8, createParams.ClassStyle);
        Assert.Equal(0, createParams.ExStyle);
        Assert.True(createParams.Height > 0);
        Assert.Equal(IntPtr.Zero, createParams.Parent);
        Assert.Null(createParams.Param);
        Assert.Equal(0x56000001, createParams.Style);
        Assert.True(createParams.Width > 0);
        Assert.Equal(0, createParams.X);
        Assert.Equal(0, createParams.Y);
        Assert.Same(createParams, control.CreateParams);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [EnumData<RightToLeft>]
    [InvalidEnumData<RightToLeft>]
    public void VScrollBar_RightToLeft_Set_GetReturnsNo(RightToLeft value)
    {
        using SubVScrollBar control = new()
        {
            RightToLeft = value
        };
        Assert.Equal(RightToLeft.No, control.RightToLeft);

        // Set same.
        control.RightToLeft = value;
        Assert.Equal(RightToLeft.No, control.RightToLeft);
    }

    [WinFormsFact]
    public void VScrollBar_RightToLeft_SetWithHandler_DoesNotCallRightToLeftChanged()
    {
        using SubVScrollBar control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.RightToLeftChanged += handler;

        // Set different.
        control.RightToLeft = RightToLeft.Yes;
        Assert.Equal(RightToLeft.No, control.RightToLeft);
        Assert.Equal(0, callCount);

        // Set same.
        control.RightToLeft = RightToLeft.Yes;
        Assert.Equal(RightToLeft.No, control.RightToLeft);
        Assert.Equal(0, callCount);

        // Set different.
        control.RightToLeft = RightToLeft.Inherit;
        Assert.Equal(RightToLeft.No, control.RightToLeft);
        Assert.Equal(0, callCount);

        // Remove handler.
        control.RightToLeftChanged -= handler;
        control.RightToLeft = RightToLeft.Yes;
        Assert.Equal(RightToLeft.No, control.RightToLeft);
        Assert.Equal(0, callCount);
    }

    [WinFormsFact]
    public void VScrollBar_GetAutoSizeMode_Invoke_ReturnsExpected()
    {
        using SubVScrollBar control = new();
        Assert.Equal(AutoSizeMode.GrowOnly, control.GetAutoSizeMode());
    }

    [WinFormsTheory]
    [InlineData(ControlStyles.ContainerControl, false)]
    [InlineData(ControlStyles.UserPaint, false)]
    [InlineData(ControlStyles.Opaque, false)]
    [InlineData(ControlStyles.ResizeRedraw, false)]
    [InlineData(ControlStyles.FixedWidth, false)]
    [InlineData(ControlStyles.FixedHeight, false)]
    [InlineData(ControlStyles.StandardClick, false)]
    [InlineData(ControlStyles.Selectable, true)]
    [InlineData(ControlStyles.UserMouse, false)]
    [InlineData(ControlStyles.SupportsTransparentBackColor, false)]
    [InlineData(ControlStyles.StandardDoubleClick, true)]
    [InlineData(ControlStyles.AllPaintingInWmPaint, true)]
    [InlineData(ControlStyles.CacheText, false)]
    [InlineData(ControlStyles.EnableNotifyMessage, false)]
    [InlineData(ControlStyles.DoubleBuffer, false)]
    [InlineData(ControlStyles.OptimizedDoubleBuffer, false)]
    [InlineData(ControlStyles.UseTextForAccessibility, false)]
    [InlineData((ControlStyles)0, true)]
    [InlineData((ControlStyles)int.MaxValue, false)]
    [InlineData((ControlStyles)(-1), false)]
    public void VScrollBar_GetStyle_Invoke_ReturnsExpected(ControlStyles flag, bool expected)
    {
        using SubVScrollBar control = new();
        Assert.Equal(expected, control.GetStyle(flag));

        // Call again to test caching.
        Assert.Equal(expected, control.GetStyle(flag));
    }

    [WinFormsFact]
    public void VScrollBar_GetTopLevel_Invoke_ReturnsExpected()
    {
        using SubVScrollBar control = new();
        Assert.False(control.GetTopLevel());
    }

    private class SubVScrollBar : VScrollBar
    {
        public new bool CanEnableIme => base.CanEnableIme;

        public new bool CanRaiseEvents => base.CanRaiseEvents;

        public new CreateParams CreateParams => base.CreateParams;

        public new Cursor DefaultCursor => base.DefaultCursor;

        public new ImeMode DefaultImeMode => base.DefaultImeMode;

        public new Padding DefaultMargin => base.DefaultMargin;

        public new Size DefaultMaximumSize => base.DefaultMaximumSize;

        public new Size DefaultMinimumSize => base.DefaultMinimumSize;

        public new Padding DefaultPadding => base.DefaultPadding;

        public new Size DefaultSize => base.DefaultSize;

        public new bool DesignMode => base.DesignMode;

        public new bool DoubleBuffered
        {
            get => base.DoubleBuffered;
            set => base.DoubleBuffered = value;
        }

        public new EventHandlerList Events => base.Events;

        public new int FontHeight
        {
            get => base.FontHeight;
            set => base.FontHeight = value;
        }

        public new ImeMode ImeModeBase
        {
            get => base.ImeModeBase;
            set => base.ImeModeBase = value;
        }

        public new bool ResizeRedraw
        {
            get => base.ResizeRedraw;
            set => base.ResizeRedraw = value;
        }

        public new bool ShowFocusCues => base.ShowFocusCues;

        public new bool ShowKeyboardCues => base.ShowKeyboardCues;

        public new AutoSizeMode GetAutoSizeMode() => base.GetAutoSizeMode();

        public new bool GetStyle(ControlStyles flag) => base.GetStyle(flag);

        public new bool GetTopLevel() => base.GetTopLevel();
    }
}
