using MeetingAssistant.LaunchProfiles;
using MeetingAssistant.Recording;
using MeetingAssistant.Taskbar;
using System.Drawing;
using System.Runtime.Versioning;

namespace MeetingAssistant.Tests;

public sealed class TaskbarIconTests
{
    [Fact]
    public void IdleMenuOffersStartForEachConfiguredProfile()
    {
        var menu = MeetingTaskbarMenuBuilder.Build(
            Status(),
            [Profile("default", "Ctrl+Alt+M"), Profile("english", "Ctrl+Alt+E")]);

        Assert.Equal(RecordingProcessState.Idle, menu.State);
        Assert.Contains(menu.Items, item =>
            item.Action == MeetingTaskbarAction.EditRules &&
            item.Text == "Settings and logs");
        Assert.Contains(menu.Items, item =>
            item.Action == MeetingTaskbarAction.StartRecording &&
            item.ProfileName == "default" &&
            item.Text == "Start meeting recording (default)\tCtrl+Alt+M");
        Assert.Contains(menu.Items, item =>
            item.Action == MeetingTaskbarAction.StartRecording &&
            item.ProfileName == "english" &&
            item.Text == "Start meeting recording (english)\tCtrl+Alt+E");
        Assert.DoesNotContain(menu.Items, item => item.Action == MeetingTaskbarAction.StopRecording);
        Assert.DoesNotContain(menu.Items, item => item.Action == MeetingTaskbarAction.AbortRecording);
    }

    [Fact]
    public void RecordingMenuOffersStopAbortAndOtherProfileSwitches()
    {
        var menu = MeetingTaskbarMenuBuilder.Build(
            Status(isRecording: true, state: RecordingProcessState.Recording, profile: "default"),
            [Profile("default", "Ctrl+Alt+M"), Profile("english", "Ctrl+Alt+E"), Profile("french", "Ctrl+Alt+F")]);

        Assert.Equal(RecordingProcessState.Recording, menu.State);
        Assert.Contains(menu.Items, item => item.Action == MeetingTaskbarAction.StopRecording);
        Assert.Contains(menu.Items, item => item.Action == MeetingTaskbarAction.AbortRecording);
        Assert.Contains(menu.Items, item =>
            item.Action == MeetingTaskbarAction.SwitchProfile &&
            item.ProfileName == "english" &&
            item.Text == "Switch to english\tCtrl+Alt+E");
        Assert.Contains(menu.Items, item =>
            item.Action == MeetingTaskbarAction.SwitchProfile &&
            item.ProfileName == "french" &&
            item.Text == "Switch to french\tCtrl+Alt+F");
        Assert.DoesNotContain(menu.Items, item =>
            item.Action == MeetingTaskbarAction.SwitchProfile &&
            item.ProfileName == "default");
        Assert.DoesNotContain(menu.Items, item => item.Action == MeetingTaskbarAction.StartRecording);
    }

    [Fact]
    public void ProcessingMenuShowsSummarizingButAllowsStartingNewRecordings()
    {
        var menu = MeetingTaskbarMenuBuilder.Build(
            Status(state: RecordingProcessState.Summarizing, profile: "default"),
            [Profile("default"), Profile("english")]);

        Assert.Equal(RecordingProcessState.Summarizing, menu.State);
        Assert.Contains(menu.Items, item =>
            item.Action == MeetingTaskbarAction.StartRecording &&
            item.ProfileName == "default");
        Assert.Contains(menu.Items, item =>
            item.Action == MeetingTaskbarAction.StartRecording &&
            item.ProfileName == "english");
        Assert.DoesNotContain(menu.Items, item => item.Action == MeetingTaskbarAction.StopRecording);
        Assert.DoesNotContain(menu.Items, item => item.Action == MeetingTaskbarAction.AbortRecording);
    }

    [Fact]
    public void RecordingStateWinsOverOlderSummarizingWork()
    {
        var menu = MeetingTaskbarMenuBuilder.Build(
            Status(isRecording: true, state: RecordingProcessState.Recording, profile: "english"),
            [Profile("default"), Profile("english")]);

        Assert.Equal(RecordingProcessState.Recording, menu.State);
    }

    [Fact]
    [SupportedOSPlatform("windows")]
    public void TaskbarIconGlyphsAreVisuallyCentered()
    {
        foreach (var state in new[]
        {
            RecordingProcessState.Idle,
            RecordingProcessState.Recording,
            RecordingProcessState.Summarizing
        })
        {
            using var bitmap = TaskbarIconRenderer.RenderBitmap(state);
            var bounds = GetVisibleGlyphBounds(bitmap);

            Assert.True(
                IsCentered(GetCenter(bounds.Left, bounds.Right)),
                $"{state} glyph is horizontally off-center: {bounds}");
            Assert.True(
                IsCentered(GetCenter(bounds.Top, bounds.Bottom)),
                $"{state} glyph is vertically off-center: {bounds}");
        }
    }

    private static LaunchProfile Profile(string name, string hotkey = "")
    {
        return new LaunchProfile(name, new MeetingAssistantOptions
        {
            Hotkey =
            {
                Toggle = hotkey
            }
        });
    }

    private static RecordingStatus Status(
        bool isRecording = false,
        RecordingProcessState state = RecordingProcessState.Idle,
        string? profile = null)
    {
        return new RecordingStatus(
            isRecording,
            state == RecordingProcessState.Idle ? null : "transcript.md",
            state == RecordingProcessState.Idle ? null : "meeting.md",
            state == RecordingProcessState.Idle ? null : "context.md",
            state == RecordingProcessState.Idle ? null : "summary.md",
            state,
            profile);
    }

    [SupportedOSPlatform("windows")]
    private static Rectangle GetVisibleGlyphBounds(Bitmap bitmap)
    {
        var left = bitmap.Width;
        var top = bitmap.Height;
        var right = -1;
        var bottom = -1;
        for (var y = 0; y < bitmap.Height; y++)
        {
            for (var x = 0; x < bitmap.Width; x++)
            {
                var pixel = bitmap.GetPixel(x, y);
                if (pixel.A < 32 || pixel.GetBrightness() < 0.58f)
                {
                    continue;
                }

                left = Math.Min(left, x);
                top = Math.Min(top, y);
                right = Math.Max(right, x);
                bottom = Math.Max(bottom, y);
            }
        }

        Assert.True(right >= left && bottom >= top, "Expected the icon to contain a visible white glyph.");
        return Rectangle.FromLTRB(left, top, right, bottom);
    }

    private static double GetCenter(int start, int end)
    {
        return (start + end) / 2.0;
    }

    private static bool IsCentered(double center)
    {
        return center is >= 7.25 and <= 8.75;
    }
}