using System.Text;
using Xunit;
using Xunit.Abstractions;

namespace Terminal.Gui.DialogTests;

public class MessageBoxTests {
	readonly ITestOutputHelper _output;

	public MessageBoxTests (ITestOutputHelper output) => _output = output;

	[Fact]
	[AutoInitShutdown]
	public void Size_Default ()
	{
		var iterations = -1;
		Application.Begin (Application.Top);
		((FakeDriver)Application.Driver).SetBufferSize (100, 100);

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				MessageBox.Query (string.Empty, string.Empty, null);

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();

				Assert.IsType<Dialog> (Application.Current);
				// Default size is Percent(60) 
				Assert.Equal (new Size ((int)(100 * .60), 5), Application.Current.Frame.Size);

				Application.RequestStop ();
			}
		};

		Application.Run ();
	}

	[Fact]
	[AutoInitShutdown]
	public void Location_Default ()
	{
		var iterations = -1;
		Application.Begin (Application.Top);
		((FakeDriver)Application.Driver).SetBufferSize (100, 100);

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				MessageBox.Query (string.Empty, string.Empty, null);

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();

				Assert.IsType<Dialog> (Application.Current);
				// Default location is centered, so
				// X = (100 / 2) - (60 / 2) = 20
				// Y = (100 / 2) - (5 / 2) = 47
				Assert.Equal (new Point (20, 47), Application.Current.Frame.Location);

				Application.RequestStop ();
			}
		};

		Application.Run ();
	}

	[Theory]
	[InlineData (0, 0)]
	[InlineData (1, 1)]
	[InlineData (7, 5)]
	[InlineData (50, 50)]
	[AutoInitShutdown]
	public void Size_Not_Default_No_Message (int height, int width)
	{
		var iterations = -1;
		Application.Begin (Application.Top);
		((FakeDriver)Application.Driver).SetBufferSize (100, 100);

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				MessageBox.Query (height, width, string.Empty, string.Empty, null);

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();

				Assert.IsType<Dialog> (Application.Current);
				Assert.Equal (new Size (height, width), Application.Current.Frame.Size);

				Application.RequestStop ();
			}
		};
	}

	[Theory]
	[InlineData (0, 0, "1")]
	[InlineData (1, 1, "1")]
	[InlineData (7, 5, "1")]
	[InlineData (50, 50, "1")]
	[InlineData (0, 0, "message")]
	[InlineData (1, 1, "message")]
	[InlineData (7, 5, "message")]
	[InlineData (50, 50, "message")]
	[AutoInitShutdown]
	public void Size_Not_Default_Message (int height, int width, string message)
	{
		var iterations = -1;
		Application.Begin (Application.Top);
		((FakeDriver)Application.Driver).SetBufferSize (100, 100);

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				MessageBox.Query (height, width, string.Empty, message, null);

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();

				Assert.IsType<Dialog> (Application.Current);
				Assert.Equal (new Size (height, width), Application.Current.Frame.Size);

				Application.RequestStop ();
			}
		};
	}

	[Theory]
	[InlineData (0, 0, "1")]
	[InlineData (1, 1, "1")]
	[InlineData (7, 5, "1")]
	[InlineData (50, 50, "1")]
	[InlineData (0, 0, "message")]
	[InlineData (1, 1, "message")]
	[InlineData (7, 5, "message")]
	[InlineData (50, 50, "message")]
	[AutoInitShutdown]
	public void Size_Not_Default_Message_Button (int height, int width, string message)
	{
		var iterations = -1;
		Application.Begin (Application.Top);
		((FakeDriver)Application.Driver).SetBufferSize (100, 100);

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				MessageBox.Query (height, width, string.Empty, message, "_Ok");

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();

				Assert.IsType<Dialog> (Application.Current);
				Assert.Equal (new Size (height, width), Application.Current.Frame.Size);

				Application.RequestStop ();
			}
		};
	}

	[Fact]
	[AutoInitShutdown]
	public void Size_None_No_Buttons ()
	{
		var iterations = -1;
		Application.Begin (Application.Top);

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				MessageBox.Query ("Title", "Message");

				Application.RequestStop ();

			} else if (iterations == 1) {
				Application.Refresh ();
				TestHelpers.AssertDriverContentsWithFrameAre (@"
                ┌┤Title├───────────────────────────────────────┐
                │                   Message                    │
                │                                              │
                │                                              │
                └──────────────────────────────────────────────┘
", _output);

				Application.RequestStop ();
			}
		};

		Application.Run ();
	}

	[Fact]
	[AutoInitShutdown]
	public void Size_No_With_Button ()
	{
		Application.Top.BorderStyle = LineStyle.Double;
		var iterations = -1;
		Application.Begin (Application.Top);

		var aboutMessage = new StringBuilder ();
		aboutMessage.AppendLine (@"0123456789012345678901234567890123456789");
		aboutMessage.AppendLine (@"https://github.com/gui-cs/Terminal.Gui");
		var message = aboutMessage.ToString ();
		var btn = $"{CM.Glyphs.LeftBracket}{CM.Glyphs.LeftDefaultIndicator} Ok {CM.Glyphs.RightDefaultIndicator}{CM.Glyphs.RightBracket}";

		((FakeDriver)Application.Driver).SetBufferSize (40 + 4, 8);

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {

				MessageBox.Query (string.Empty, message, "_Ok");

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();
				TestHelpers.AssertDriverContentsWithFrameAre (@$"
╔══════════════════════════════════════════╗
║┌────────────────────────────────────────┐║
║│0123456789012345678901234567890123456789│║
║│ https://github.com/gui-cs/Terminal.Gui │║
║│                                        │║
║│                {btn}                │║
║└────────────────────────────────────────┘║
╚══════════════════════════════════════════╝
", _output);

				Application.RequestStop ();
			}
		};

		Application.Run ();
	}

	[Fact]
	[AutoInitShutdown]
	public void Size_Tiny_Fixed_Size ()
	{
		var iterations = -1;
		Application.Begin (Application.Top);

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				MessageBox.Query (7, 5, string.Empty, "Message", "_Ok");

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();

				Assert.Equal (new Size (7, 5), Application.Current.Frame.Size);

				TestHelpers.AssertDriverContentsWithFrameAre (@$"
                                    ┌─────┐
                                    │Messa│
                                    │ ge  │
                                    │ Ok {CM.Glyphs.RightDefaultIndicator}│
                                    └─────┘
", _output);

				Application.RequestStop ();
			}
		};

		Application.Run ();
	}

	[Fact]
	[AutoInitShutdown]
	public void Size_JustBigEnough_Fixed_Size ()
	{
		var iterations = -1;
		Application.Begin (Application.Top);
		var btn = $"{CM.Glyphs.LeftBracket}{CM.Glyphs.LeftDefaultIndicator} Ok {CM.Glyphs.RightDefaultIndicator}{CM.Glyphs.RightBracket}";

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				MessageBox.Query (11, 5, string.Empty, "Message", "_Ok");

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();
				TestHelpers.AssertDriverContentsWithFrameAre (@$"
                                  ┌─────────┐
                                  │ Message │
                                  │         │
                                  │{btn} │
                                  └─────────┘
", _output);

				Application.RequestStop ();
			}
		};

		Application.Run ();
	}

	[Fact]
	[AutoInitShutdown]
	public void Message_Long_Without_Spaces_WrapMessage_True ()
	{
		var iterations = -1;
		Application.Begin (Application.Top);
		Application.Top.BorderStyle = LineStyle.Double;
		((FakeDriver)Application.Driver).SetBufferSize (20, 10);

		var btn = $"{CM.Glyphs.LeftBracket}{CM.Glyphs.LeftDefaultIndicator} btn {CM.Glyphs.RightDefaultIndicator}{CM.Glyphs.RightBracket}";
		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				// 50 characters should make the height of the wrapped text 7
				MessageBox.Query (string.Empty, new string ('f', 50), 0, true, "btn");

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();

				TestHelpers.AssertDriverContentsWithFrameAre (@$"
╔══════════════════╗
║┌────────────────┐║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│       ff       │║
║│                │║
║│    {btn}   │║
║└────────────────┘║
╚══════════════════╝", _output);
				Assert.Equal (new Size (20 - 2, 10 - 2), Application.Current.Frame.Size);
				Application.RequestStop ();

				// Really long text
				MessageBox.Query (string.Empty, new string ('f', 500), 0, true, "btn");
			} else if (iterations == 2) {
				Application.Refresh ();
				TestHelpers.AssertDriverContentsWithFrameAre (@$"
╔┌────────────────┐╗
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│    {btn}   │║
╚└────────────────┘╝", _output);
				Application.RequestStop ();
			}
		};

		Application.Run ();
	}

	[Fact]
	[AutoInitShutdown]
	public void Message_With_Spaces_WrapMessage_True ()
	{
		var iterations = -1;
		Application.Begin (Application.Top);
		Application.Top.BorderStyle = LineStyle.Double;
		((FakeDriver)Application.Driver).SetBufferSize (20, 10);

		var btn = $"{CM.Glyphs.LeftBracket}{CM.Glyphs.LeftDefaultIndicator} btn {CM.Glyphs.RightDefaultIndicator}{CM.Glyphs.RightBracket}";

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				var sb = new StringBuilder ();
				for (var i = 0; i < 17; i++) {
					sb.Append ("ff ");
				}

				MessageBox.Query (string.Empty, sb.ToString (), 0, true, "btn");

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();
				TestHelpers.AssertDriverContentsWithFrameAre (@$"
╔══════════════════╗
║ ┌──────────────┐ ║
║ │ff ff ff ff ff│ ║
║ │ff ff ff ff ff│ ║
║ │ff ff ff ff ff│ ║
║ │    ff ff     │ ║
║ │              │ ║
║ │   {btn}  │ ║
║ └──────────────┘ ║
╚══════════════════╝", _output);
				Application.RequestStop ();

				// Really long text
				MessageBox.Query (string.Empty, new string ('f', 500), 0, true, "btn");
			} else if (iterations == 2) {
				Application.Refresh ();
				TestHelpers.AssertDriverContentsWithFrameAre (@$"
╔┌────────────────┐╗
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│ffffffffffffffff│║
║│    {btn}   │║
╚└────────────────┘╝", _output);
				Application.RequestStop ();
			}
		};

		Application.Run ();
	}

	[Fact]
	[AutoInitShutdown]
	public void Message_Without_Spaces_WrapMessage_False ()
	{
		var iterations = -1;
		Application.Begin (Application.Top);
		Application.Top.BorderStyle = LineStyle.Double;
		((FakeDriver)Application.Driver).SetBufferSize (20, 10);

		var btn = $"{CM.Glyphs.LeftBracket}{CM.Glyphs.LeftDefaultIndicator} btn {CM.Glyphs.RightDefaultIndicator}{CM.Glyphs.RightBracket}";

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				MessageBox.Query (string.Empty, new string ('f', 50), 0, false, "btn");

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();
				TestHelpers.AssertDriverContentsWithFrameAre (@"
╔══════════════════╗
║                  ║
────────────────────
ffffffffffffffffffff
                    
      ⟦► btn ◄⟧     
────────────────────
║                  ║
║                  ║
╚══════════════════╝", _output);

				Application.RequestStop ();

				// Really long text
				MessageBox.Query (string.Empty, new string ('f', 500), 0, false, "btn");
			} else if (iterations == 2) {
				Application.Refresh ();
				TestHelpers.AssertDriverContentsWithFrameAre (@"
╔══════════════════╗
║                  ║
────────────────────
ffffffffffffffffffff
                    
      ⟦► btn ◄⟧     
────────────────────
║                  ║
║                  ║
╚══════════════════╝", _output);

				Application.RequestStop ();
			}
		};

		Application.Run ();
	}

	[Fact]
	[AutoInitShutdown]
	public void Message_With_Spaces_WrapMessage_False ()
	{
		var iterations = -1;
		Application.Begin (Application.Top);
		Application.Top.BorderStyle = LineStyle.Double;
		((FakeDriver)Application.Driver).SetBufferSize (20, 10);
		var btn = $"{CM.Glyphs.LeftBracket}{CM.Glyphs.LeftDefaultIndicator} btn {CM.Glyphs.RightDefaultIndicator}{CM.Glyphs.RightBracket}";

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				var sb = new StringBuilder ();
				for (var i = 0; i < 17; i++) {
					sb.Append ("ff ");
				}

				MessageBox.Query (string.Empty, sb.ToString (), 0, false, "btn");

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();
				TestHelpers.AssertDriverContentsWithFrameAre (@"
╔══════════════════╗
║                  ║
────────────────────
ff ff ff ff ff ff ff
                    
      ⟦► btn ◄⟧     
────────────────────
║                  ║
║                  ║
╚══════════════════╝", _output);
				Application.RequestStop ();

				// Really long text
				MessageBox.Query (string.Empty, new string ('f', 500), 0, false, "btn");
			} else if (iterations == 2) {
				Application.Refresh ();
				TestHelpers.AssertDriverContentsWithFrameAre (@"
╔══════════════════╗
║                  ║
────────────────────
ffffffffffffffffffff
                    
      ⟦► btn ◄⟧     
────────────────────
║                  ║
║                  ║
╚══════════════════╝", _output);
				Application.RequestStop ();
			}
		};

		Application.Run ();
	}

	[Theory]
	[AutoInitShutdown]
	[InlineData (" ", true, 1)]
	[InlineData (" ", false, 1)]
	[InlineData ("", true, 1)]
	[InlineData ("", false, 1)]
	[InlineData ("\n", true, 1)]
	[InlineData ("\n", false, 1)]
	[InlineData (" \n", true, 1)]
	[InlineData (" \n", false, 2)]
	public void Message_Empty_Or_A_NewLline_WrapMessagge_True_Or_False (string message, bool wrapMessage, int linesLength)
	{
		var iterations = -1;
		Application.Begin (Application.Top);

		Application.Iteration += (s, a) => {
			iterations++;

			if (iterations == 0) {
				MessageBox.Query (string.Empty, message, 0, wrapMessage, "ok");

				Application.RequestStop ();
			} else if (iterations == 1) {
				Application.Refresh ();
				if (linesLength == 1) {
					TestHelpers.AssertDriverContentsWithFrameAre (@$"
                ┌──────────────────────────────────────────────┐
                │                                              │
                │                                              │
                │                   {CM.Glyphs.LeftBracket}{CM.Glyphs.LeftDefaultIndicator} ok {CM.Glyphs.RightDefaultIndicator}{CM.Glyphs.RightBracket}                   │
                └──────────────────────────────────────────────┘", _output);
				} else {
					TestHelpers.AssertDriverContentsWithFrameAre (@$"
                ┌──────────────────────────────────────────────┐
                │                                              │
                │                                              │
                │                                              │
                │                   {CM.Glyphs.LeftBracket}{CM.Glyphs.LeftDefaultIndicator} ok {CM.Glyphs.RightDefaultIndicator}{CM.Glyphs.RightBracket}                   │
                └──────────────────────────────────────────────┘", _output);
				}
				Application.RequestStop ();
			}
		};

		Application.Run ();
	}


	[Fact]
	[AutoInitShutdown]
	public void KeyBindings_Esc_Closes ()
	{
		Application.Begin (Application.Top);

		var result = 999;

		var iteration = 0;
		Application.Iteration += (s, a) => {
			iteration++;
			switch (iteration) {
			case 1:
				result = MessageBox.Query (title: string.Empty, message: string.Empty, defaultButton: 0, wrapMessage: false, "btn0", "btn1");
				Application.RequestStop ();
				break;

			case 2:
				Application.OnKeyDown (Key.Esc);
				break;

			default:
				Assert.Fail ();
				break;

			}
		};
		Application.Run ();

		Assert.Equal (-1, result);
	}

	[Fact]
	[AutoInitShutdown]
	public void KeyBindings_Enter_Causes_Focused_Button_Click ()
	{
		Application.Begin (Application.Top);

		var result = -1;

		var iteration = 0;
		Application.Iteration += (s, a) => {
			iteration++;
			switch (iteration) {
			case 1:
				result = MessageBox.Query (title: string.Empty, message: string.Empty, defaultButton: 0, wrapMessage: false, "btn0", "btn1");
				Application.RequestStop ();
				break;

			case 2:
				// Tab to btn2
				Application.OnKeyDown (Key.Tab);
				Application.OnKeyDown (Key.Enter);
				break;
			
			default:
				Assert.Fail ();
				break;

			}
		};
		Application.Run ();

		Assert.Equal (1, result);
	}

	[Fact]
	[AutoInitShutdown]
	public void KeyBindings_Space_Causes_Focused_Button_Click ()
	{
		Application.Begin (Application.Top);

		var result = -1;

		var iteration = 0;
		Application.Iteration += (s, a) => {
			iteration++;
			switch (iteration) {
			case 1:
				result = MessageBox.Query (title: string.Empty, message: string.Empty, defaultButton: 0, wrapMessage: false, "btn0", "btn1");
				Application.RequestStop ();
				break;
				
			case 2:
				// Tab to btn2
				Application.OnKeyDown (Key.Tab);
				Application.OnKeyDown (Key.Space);
				break;

			default:
				Assert.Fail ();
				break;

			}
		};
		Application.Run ();

		Assert.Equal (1, result);
	}
}