using System;
using System.Linq;
using FlaxEditor;
using FlaxEngine;
using FlaxEngine.Assertions;
using FlaxEngine.GUI;
using Object = FlaxEngine.Object;

namespace Game;

public class ConsoleScript : Script
{
    public Color BackgroundColor;

    public Texture BackgroundTexture;
    private ConsoleContentTextBox consoleBox;

    public FontAsset ConsoleFont;
    [Limit(5, 720)] public int ConsoleFontSize = 16;

    [Limit(0.05f, 1.0f)] public float ConsoleHeight = 0.65f;
    private ConsoleInputTextBox consoleInputBox;

    internal InputEvent consoleInputEvent;
    private ConsoleContentTextBox consoleNotifyBox;

    [Limit(0)] public int ConsoleNotifyLines = 15;

    [Limit(0f)] public float ConsoleSpeed = 3500f;

    private UIControl rootControl;

    private int fontHeight;

    public override void OnStart()
    {
        consoleInputEvent = new InputEvent("Console");
        consoleInputEvent.Pressed += OnConsoleInputEvent;

        FontReference fontReference = new FontReference(ConsoleFont, ConsoleFontSize);
        Font fontRaw = fontReference.GetFont();
        fontHeight = (int)(fontRaw.Height / Platform.DpiScale);
        // root actor which holds all the elements
        //var rootContainerControl = new ContainerControl(new Rectangle(0, 0, screenSize.X, screenSize.Y));
        ContainerControl rootContainerControl = new ContainerControl(new Rectangle());
        rootContainerControl.SetAnchorPreset(AnchorPresets.StretchAll, false);

        rootControl = Actor.AddChild<UIControl>();
        rootControl.Name = "ConsoleRoot";
        rootControl.Control = rootContainerControl;

        VerticalPanel contentContainer = new VerticalPanel
        {
            AutoSize = true,
            Margin = Margin.Zero,
            Spacing = 0,
            Bounds = new Rectangle(),
            BackgroundColor = BackgroundColor
        };
        contentContainer.SetAnchorPreset(AnchorPresets.StretchAll, true);

        UIControl contentContainerControl = rootControl.AddChild<UIControl>();
        contentContainerControl.Name = "ContentContainer";
        contentContainerControl.Control = contentContainer;

        {
            if (consoleBox == null)
            {
                //consoleBox = new ConsoleContentTextBox(null, 0, 0, consoleSize.X, consoleSize.Y - fontHeight);
                consoleBox = new ConsoleContentTextBox(fontReference, null, 0, 0, 0, 0);


                consoleBox.SetAnchorPreset(AnchorPresets.HorizontalStretchTop, true);
                //consoleBox.AnchorMax = new Float2(1.0f, ConsoleHeight);
                //consoleBox.Height = consoleSize.Y - fontHeight;

                //consoleBox.HorizontalAlignment = TextAlignment.Near;
                //consoleBox.VerticalAlignment = TextAlignment.Near;
                consoleBox.HeightMultiplier = ConsoleHeight;
                consoleBox.Wrapping = TextWrapping.WrapWords;
                consoleBox.BackgroundColor = Color.Transparent;
                consoleBox.BackgroundSelectedColor = Color.Transparent;
                consoleBox.BackgroundSelectedFlashSpeed = 0;
                consoleBox.BorderSelectedColor = Color.Transparent;
                consoleBox.CaretFlashSpeed = 0;
            }

            Float2 locationFix = consoleBox.Location;
            UIControl parentControl = contentContainerControl.AddChild<UIControl>();
            parentControl.Name = "ConsoleContent";
            parentControl.Control = consoleBox;
            consoleBox.Location = locationFix; // workaround to UIControl.Control overriding the old position

            if (consoleNotifyBox == null)
            {
                //consoleBox = new ConsoleContentTextBox(null, 0, 0, consoleSize.X, consoleSize.Y - fontHeight);
                consoleNotifyBox = new ConsoleContentTextBox(fontReference, null, 0, 0, 0, 0);
                consoleNotifyBox.HeightMultiplier = 0;
                consoleNotifyBox.Height = ConsoleNotifyLines * fontHeight;
                consoleNotifyBox.SetAnchorPreset(AnchorPresets.HorizontalStretchTop, true);
                //consoleBox.AnchorMax = new Float2(1.0f, ConsoleHeight);

                //consoleBox.HorizontalAlignment = TextAlignment.Near;
                //consoleBox.VerticalAlignment = TextAlignment.Near;
                //consoleNotifyBox.HeightMultiplier = ConsoleHeight;
                consoleNotifyBox.Wrapping = TextWrapping.WrapWords;
                consoleNotifyBox.BackgroundColor = Color.Transparent;
                consoleNotifyBox.BackgroundSelectedColor = Color.Transparent;
                consoleNotifyBox.BackgroundSelectedFlashSpeed = 0;
                consoleNotifyBox.BorderSelectedColor = Color.Transparent;
                consoleNotifyBox.CaretFlashSpeed = 0;
                consoleNotifyBox.SelectionAllowed = false;
            }

            Float2 locationFix2 = consoleNotifyBox.Location;
            UIControl parentControl2 = Actor.AddChild<UIControl>();
            parentControl2.Name = "ConsoleNotifyContent";
            parentControl2.Control = consoleNotifyBox;
            consoleNotifyBox.Location = locationFix2; // workaround to UIControl.Control overriding the old position
        }
        {
            if (consoleInputBox == null)
            {
                //consoleInputBox = new ConsoleInputTextBox(consoleBox, 0, consoleSize.Y - fontHeight, consoleSize.X, fontHeight);
                consoleInputBox = new ConsoleInputTextBox(consoleBox, 0, 0, 0, 0);
                consoleInputBox.SetAnchorPreset(AnchorPresets.HorizontalStretchTop, false);
                //consoleInputBox.Location = new Float2(0, consoleSize.Y - fontHeight);
                consoleInputBox.Height = fontHeight;

                consoleInputBox.Font = fontReference;
                consoleBox.inputBox = consoleInputBox;

                consoleInputBox.Wrapping = TextWrapping.WrapWords;
                consoleInputBox.BackgroundColor = Color.Transparent;
                consoleInputBox.BackgroundSelectedColor = Color.Transparent;
                consoleInputBox.BackgroundSelectedFlashSpeed = 0;
                consoleInputBox.BorderSelectedColor = Color.Transparent;
                consoleInputBox.CaretFlashSpeed = 0;
            }


            Float2 locationFix = consoleInputBox.Location;
            UIControl parentControl = contentContainerControl.AddChild<UIControl>();
            parentControl.Name = "ConsoleInput";
            parentControl.Control = consoleInputBox;

            consoleInputBox.Location = locationFix; // workaround to UIControl.Control overriding the old position
        }

        /*FlaxEditor.Editor.Options.OptionsChanged += (FlaxEditor.Options.EditorOptions options) =>
        {

        };*/

        /*Console.Print("normal line");
        Console.Print(
              "a very very very long long long line in repeat a very very very long long long line in repeat 1 a very very ver"
            + "y long long long line in repeat a very very very 2 long long long line in repeat a very very very 3 long long"
            + " long line in repeat a very very very long long long 4 line in repeat");
        Console.Print("another normal line");*/

        //for (int i=0; i<10000; i++)
        //    Debug.Log("a very very very long long long line in repeat a very very very long long long line in");

        Debug.Logger.LogHandler.SendLog += OnSendLog;
        Debug.Logger.LogHandler.SendExceptionLog += OnSendExceptionLog;


        Console.OnOpen += OnConsoleOpen;
        Console.OnClose += OnConsoleClose;
        Console.OnPrint += OnPrint;

        // hide console by default, and close it instantly
        Console.Close();
        OnConsoleClose();
        Float2 rootlocation = rootControl.Control.Location;
        rootlocation.Y = -rootControl.Control.Height;
        rootControl.Control.Location = rootlocation;

        //Console.Print("Renderer: " + GPUDevice.Instance.RendererType);
    }

    private void OnSendLog(LogType level, string msg, Object obj, string stackTrace)
    {
        Console.Print("[DEBUG] " + msg);
    }

    private void OnSendExceptionLog(Exception exception, Object obj)
    {
        AssertionException assert = exception as AssertionException;
        if (assert != null)
        {
            string[] assertLines = assert.Message.Split('\n');
            if (assertLines.Length > 2)
                Console.Print("Assert Failure: " + assertLines[2]);
            else
                Console.Print("Assert Failure: " + assert.Message);
        }
        else
        {
            Console.Print("[EXCEP] " + exception.ToString());
        }
    }

    public override void OnDestroy()
    {
        base.OnDestroy();

        //consoleInputEvent.Triggered -= OnConsoleInputEvent;
        consoleInputEvent?.Dispose();
        consoleBox?.Dispose();
        consoleNotifyBox?.Dispose();

        Console.OnOpen -= OnConsoleOpen;
        Console.OnClose -= OnConsoleClose;
        Console.OnPrint -= OnPrint;

        Debug.Logger.LogHandler.SendLog -= OnSendLog;
        Debug.Logger.LogHandler.SendExceptionLog -= OnSendExceptionLog;
    }

    private void OnConsoleInputEvent()
    {
        string currentInput = Input.InputText;

        if (Input.InputText.Length > 0)
        {
            // TODO: Remove when engine has support for binding to physical keys/scancode instead of virtual ones
            var consoleKeys = Input.ActionMappings.Where(x => x.Name == "Console" && x.Key != KeyboardKeys.None);
            bool backslash = consoleKeys.Any(x => x.Key == KeyboardKeys.Backslash);
            bool backquote = consoleKeys.Any(x => x.Key == KeyboardKeys.BackQuote);

            // Workaround to only trigger Console key from key bound to left side of 1 (tilde/backquote/backslash key)
            if ((backslash || backquote) &&
                (Input.InputText.ToLowerInvariant().Contains('ö') ||
                 Input.InputText.ToLowerInvariant().Contains('æ') ||
                 Input.InputText.ToLowerInvariant().Contains('ø'))) // Scandinavian keyboard layouts
                return;
            if (backquote && Input.InputText.ToLowerInvariant().Contains('\'')) // UK keyboard layouts
                return;
            if (backslash && (Input.InputText.ToLowerInvariant().Contains('\\') ||
                              Input.InputText.ToLowerInvariant()
                                  .Contains('|'))) // US/International keyboard layouts
            {
                return;
            }
        }

        if (!consoleInputBox.IsFocused)
            Console.Open();
        else
            Console.Close();
    }

    public void OnConsoleOpen()
    {
        Screen.CursorVisible = true;
        Screen.CursorLock = CursorLockMode.None;

        consoleInputBox.Focus();
        Parent.As<UICanvas>().ReceivesEvents = true;
    }

    public void OnConsoleClose()
    {
        Screen.CursorVisible = false;
        Screen.CursorLock = CursorLockMode.Locked;

        consoleInputBox.Defocus();
#if FLAX_EDITOR
        Editor.Instance.Windows.GameWin.Focus();
#endif
        Parent.As<UICanvas>().ReceivesEvents = false;
    }

    public override void OnUpdate()
    {
#if !USE_EDITOR
        consoleNotifyBox.Width = consoleBox.Width;
#endif
        if (!Console.IsOpen && Input.GetAction("ClearConsole"))
            Console.Clear();

        float targetY;
        float conHeight = rootControl.Control.Height /*/ Platform.DpiScale*/;
        if (!Console.IsOpen)
            targetY = -conHeight;
        else
            targetY = 0.0f;

        Float2 location = rootControl.Control.Location;
        if (location.Y != targetY)
        {
            if (location.Y > targetY)
            {
                // closing
                location.Y -= Time.UnscaledDeltaTime * ConsoleSpeed;
                if (location.Y < targetY)
                    location.Y = targetY;

                if (location.Y < targetY * ConsoleHeight)
                    location.Y = targetY;
            }
            else if (location.Y < targetY)
            {
                // opening
                if (location.Y < -conHeight * ConsoleHeight)
                    location.Y = -conHeight * ConsoleHeight;

                location.Y += Time.UnscaledDeltaTime * ConsoleSpeed;
                if (location.Y > targetY)
                    location.Y = targetY;
            }

            rootControl.Control.Location = location;

            if (Console.IsOpen)
            {
                consoleNotifyBox.Visible = false;
                consoleInputBox.Visible = true;
            }
            else if (!Console.IsOpen)
            {
                if (location.Y < -conHeight * ConsoleHeight + fontHeight)
                {
                    consoleNotifyBox.Visible = true;
                    consoleInputBox.Visible = false;
                }
            }
        }
    }

    public void OnPrint(string text)
    {
        consoleNotifyBox.Height = Math.Min(ConsoleNotifyLines, Console.Lines.Length) * fontHeight;
    }

    public void SetInput(string text)
    {
        consoleInputBox.Text = text;
    }
}