/*
 *                     GNU AFFERO GENERAL PUBLIC LICENSE
 *                       Version 3, 19 November 2007
 *  Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 *  Everyone is permitted to copy and distribute verbatim copies
 *  of this license document, but changing it is not allowed.
 */

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;
using System;
using System.Drawing;
using System.Text;
using UVtools.Core.Extensions;
using UVtools.Core.FileFormats;
using UVtools.Core.Layers;

namespace UVtools.Core.Operations;


public sealed class OperationCalibrateLiftHeight : Operation
{
    #region Members
    private decimal _layerHeight;
    private ushort _bottomLayers = 3;
    private ushort _normalLayers = 2;
    private decimal _bottomExposure;
    private decimal _normalExposure;
    private decimal _bottomLiftHeight;
    private decimal _liftHeight;
    private decimal _bottomLiftSpeed;
    private decimal _liftSpeed;
    private decimal _retractSpeed;
    private ushort _leftRightMargin = 200;
    private ushort _topBottomMargin = 200;
    private bool _decreaseImage = true;
    private byte _decreaseImageFactor = 10;
    private byte _minimumImageFactor = 10;

    #endregion

    #region Overrides

    public override bool CanROI => false;

    public override bool CanCancel => false;

    public override LayerRangeSelection StartLayerRangeSelection => LayerRangeSelection.None;
    public override string IconClass => "mdi-arrow-expand-up";
    public override string Title => "Lift height";
    public override string Description =>
        "Generates test models with various strategies and increments to measure the optimal lift height or peel forces for layers given the printed area.\n" +
        "You must have a tool to measure the lift height / forces as it moves up, record the values to determine the lowest safe value for the lift.\n" +
        "After find the height where it peels, you must give from 1mm to 2mm more for safeness.\n" +
        "You must repeat this test when change any of the following: printer, LEDs, resin and exposure times.\n" +
        "Note: The current opened file will be overwritten with this test, use a dummy or a not needed file.";

    public override string ConfirmationText =>
        $"generate the lift height test?";

    public override string ProgressTitle =>
        $"Generating the lift height test";

    public override string ProgressAction => "Generated";

    public override string? ValidateInternally()
    {
        var sb = new StringBuilder();

        if (SlicerFile.ResolutionX - _leftRightMargin * 2 <= 0)
            sb.AppendLine("The top/bottom margin is too big, it overlaps the screen resolution.");
            
        if (SlicerFile.ResolutionY - _topBottomMargin * 2 <= 0)
            sb.AppendLine("The top/bottom margin is too big, it overlaps the screen resolution.");

        if (_decreaseImage)
        {
            if(_decreaseImageFactor is 0 or >= 100)
                sb.AppendLine("The image decrease factor must be between 1 and 99%");

            if(_minimumImageFactor is 0 or >= 100)
                sb.AppendLine("The minimum image decrease factor must be between 1 and 99%");
        }
            
        return sb.ToString();
    }

    public override string ToString()
    {
        var result = $"[Layer Height: {_layerHeight}] " +
                     $"[Layers: {_bottomLayers}/{_normalLayers}] " +
                     $"[Exposure: {_bottomExposure}/{_normalExposure}s] " +
                     $"[Lift: {_bottomLiftHeight}/{_liftHeight}mm @ {_bottomLiftSpeed}/{_liftSpeed}mm/min]" +
                     $"[Retract speed: {_retractSpeed}mm/min]" +
                     $"[Decrease image: {_decreaseImage} @ {_decreaseImageFactor}-{_minimumImageFactor}%]";
        if (!string.IsNullOrEmpty(ProfileName)) result = $"{ProfileName}: {result}";
        return result;
    }

    #endregion

    #region Properties

    public decimal LayerHeight
    {
        get => _layerHeight;
        set
        {
            if(!RaiseAndSetIfChanged(ref _layerHeight, Layer.RoundHeight(value))) return;
            RaisePropertyChanged(nameof(BottomHeight));
            RaisePropertyChanged(nameof(NormalHeight));
            RaisePropertyChanged(nameof(TotalHeight));
        }
    }
        
    public ushort Microns => (ushort) (LayerHeight * 1000);

    public ushort BottomLayers
    {
        get => _bottomLayers;
        set
        {
            if(!RaiseAndSetIfChanged(ref _bottomLayers, value)) return;
            RaisePropertyChanged(nameof(BottomHeight));
            RaisePropertyChanged(nameof(TotalHeight));
            RaisePropertyChanged(nameof(LayerCount));
        }
    }

    public ushort NormalLayers
    {
        get => _normalLayers;
        set
        {
            if (!RaiseAndSetIfChanged(ref _normalLayers, value)) return;
            RaisePropertyChanged(nameof(NormalHeight));
            RaisePropertyChanged(nameof(TotalHeight));
            RaisePropertyChanged(nameof(LayerCount));
        }
    }

    public uint LayerCount
    {
        get
        {
            uint layerCount = (uint)(_bottomLayers + _normalLayers);
            if (_decreaseImage)
            {
                layerCount += (100u - _minimumImageFactor) / _decreaseImageFactor;
                //layerCount += (uint)Math.Ceiling((100.0 - _minimumImageFactor - _decreaseImageFactor) / _decreaseImageFactor);
                //for (int factor = 100 - _decreaseImageFactor; factor >= _minimumImageFactor; factor -= _decreaseImageFactor) 
                //    layerCount++;
            }
            return layerCount;
        }
    }

    public decimal BottomHeight => Layer.RoundHeight(_layerHeight * _bottomLayers);
    public decimal NormalHeight => Layer.RoundHeight(_layerHeight * (LayerCount - _bottomLayers));

    public decimal TotalHeight => BottomHeight + NormalHeight;

    public decimal BottomExposure
    {
        get => _bottomExposure;
        set => RaiseAndSetIfChanged(ref _bottomExposure, Math.Round(value, 2));
    }

    public decimal NormalExposure
    {
        get => _normalExposure;
        set => RaiseAndSetIfChanged(ref _normalExposure, Math.Round(value, 2));
    }

    public decimal BottomLiftHeight
    {
        get => _bottomLiftHeight;
        set => RaiseAndSetIfChanged(ref _bottomLiftHeight, value);
    }

    public decimal LiftHeight
    {
        get => _liftHeight;
        set => RaiseAndSetIfChanged(ref _liftHeight, value);
    }

    public decimal BottomLiftSpeed
    {
        get => _bottomLiftSpeed;
        set => RaiseAndSetIfChanged(ref _bottomLiftSpeed, value);
    }

    public decimal LiftSpeed
    {
        get => _liftSpeed;
        set => RaiseAndSetIfChanged(ref _liftSpeed, value);
    }

    public decimal RetractSpeed
    {
        get => _retractSpeed;
        set => RaiseAndSetIfChanged(ref _retractSpeed, value);
    }

    public ushort LeftRightMargin
    {
        get => _leftRightMargin;
        set => RaiseAndSetIfChanged(ref _leftRightMargin, value);
    }

    public ushort MaxLeftRightMargin => (ushort)((SlicerFile.ResolutionX - 100) / 2);

    public ushort TopBottomMargin
    {
        get => _topBottomMargin;
        set => RaiseAndSetIfChanged(ref _topBottomMargin, value);
    }

    public ushort MaxTopBottomMargin => (ushort) ((SlicerFile.ResolutionY - 100) / 2);

    public bool DecreaseImage
    {
        get => _decreaseImage;
        set
        {
            RaiseAndSetIfChanged(ref _decreaseImage, value);
            RaisePropertyChanged(nameof(TotalHeight));
            RaisePropertyChanged(nameof(LayerCount));
        }
    }

    public byte DecreaseImageFactor
    {
        get => _decreaseImageFactor;
        set
        {
            RaiseAndSetIfChanged(ref _decreaseImageFactor, value);
            RaisePropertyChanged(nameof(TotalHeight));
            RaisePropertyChanged(nameof(LayerCount));
        }
    }

    public byte MinimumImageFactor
    {
        get => _minimumImageFactor;
        set
        {
            RaiseAndSetIfChanged(ref _minimumImageFactor, value);
            RaisePropertyChanged(nameof(TotalHeight));
            RaisePropertyChanged(nameof(LayerCount));
        }
    }

    public Rectangle WhiteBlock
    {
        get
        {
            int width = (int) (SlicerFile.ResolutionX - _leftRightMargin * 2);
            int height = (int) (SlicerFile.ResolutionY - _topBottomMargin * 2);
            int x = (int) (SlicerFile.ResolutionX - width) / 2;
            int y = (int) (SlicerFile.ResolutionY - height) / 2;

            return new Rectangle(x, y, width, height);
        }
    }

    #endregion

    #region Constructor

    public OperationCalibrateLiftHeight() { }

    public OperationCalibrateLiftHeight(FileFormat slicerFile) : base(slicerFile)
    { }

    public override void InitWithSlicerFile()
    {
        base.InitWithSlicerFile();
        if(_layerHeight <= 0) _layerHeight = (decimal)SlicerFile.LayerHeight;
        if(_bottomExposure <= 0) _bottomExposure = (decimal)SlicerFile.BottomExposureTime;
        if(_normalExposure <= 0) _normalExposure = (decimal)SlicerFile.ExposureTime;
        if (_bottomLiftHeight <= 0) _bottomLiftHeight = (decimal)SlicerFile.BottomLiftHeight;
        if (_liftHeight <= 0) _liftHeight = (decimal)SlicerFile.LiftHeight;
        if (_bottomLiftSpeed <= 0) _bottomLiftSpeed = (decimal) SlicerFile.BottomLiftSpeed;
        if (_liftSpeed <= 0) _liftSpeed = (decimal) SlicerFile.LiftSpeed;
        if (_retractSpeed <= 0) _retractSpeed = (decimal) SlicerFile.RetractSpeed;
    }

    #endregion

    #region Equality

    private bool Equals(OperationCalibrateLiftHeight other)
    {
        return _layerHeight == other._layerHeight && _bottomLayers == other._bottomLayers && _normalLayers == other._normalLayers && _bottomExposure == other._bottomExposure && _normalExposure == other._normalExposure && _bottomLiftHeight == other._bottomLiftHeight && _liftHeight == other._liftHeight && _bottomLiftSpeed == other._bottomLiftSpeed && _liftSpeed == other._liftSpeed && _retractSpeed == other._retractSpeed && _leftRightMargin == other._leftRightMargin && _topBottomMargin == other._topBottomMargin && _decreaseImage == other._decreaseImage && _decreaseImageFactor == other._decreaseImageFactor && _minimumImageFactor == other._minimumImageFactor;
    }

    public override bool Equals(object? obj)
    {
        return ReferenceEquals(this, obj) || obj is OperationCalibrateLiftHeight other && Equals(other);
    }

    public override int GetHashCode()
    {
        var hashCode = new HashCode();
        hashCode.Add(_layerHeight);
        hashCode.Add(_bottomLayers);
        hashCode.Add(_normalLayers);
        hashCode.Add(_bottomExposure);
        hashCode.Add(_normalExposure);
        hashCode.Add(_bottomLiftHeight);
        hashCode.Add(_liftHeight);
        hashCode.Add(_bottomLiftSpeed);
        hashCode.Add(_liftSpeed);
        hashCode.Add(_retractSpeed);
        hashCode.Add(_leftRightMargin);
        hashCode.Add(_topBottomMargin);
        hashCode.Add(_decreaseImage);
        hashCode.Add(_decreaseImageFactor);
        hashCode.Add(_minimumImageFactor);
        return hashCode.ToHashCode();
    }

    #endregion

    #region Methods

    /// <summary>
    /// Gets the bottom and normal layers, 0 = bottom | 1 = normal
    /// </summary>
    /// <returns></returns>
    public Mat[] GetLayers()
    {
        var layers = new Mat[1];

        layers[0] = EmguExtensions.InitMat(SlicerFile.Resolution);
        CvInvoke.Rectangle(layers[0], WhiteBlock, EmguExtensions.WhiteColor, -1);

        return layers;
    }

    public Mat GetThumbnail()
    {
        Mat thumbnail = EmguExtensions.InitMat(new Size(400, 200), 3);
        var fontFace = FontFace.HersheyDuplex;
        var fontScale = 1;
        var fontThickness = 2;
        const byte xSpacing = 45;
        const byte ySpacing = 45;
        CvInvoke.PutText(thumbnail, "UVtools", new Point(140, 35), fontFace, fontScale, new MCvScalar(255, 27, 245), fontThickness + 1);
        CvInvoke.Line(thumbnail, new Point(xSpacing, 0), new Point(xSpacing, ySpacing + 5), new MCvScalar(255, 27, 245), 3);
        CvInvoke.Line(thumbnail, new Point(xSpacing, ySpacing + 5), new Point(thumbnail.Width - xSpacing, ySpacing + 5), new MCvScalar(255, 27, 245), 3);
        CvInvoke.Line(thumbnail, new Point(thumbnail.Width - xSpacing, 0), new Point(thumbnail.Width - xSpacing, ySpacing + 5), new MCvScalar(255, 27, 245), 3);
        CvInvoke.PutText(thumbnail, "Lift Height Cal.", new Point(xSpacing, ySpacing * 2), fontFace, fontScale, new MCvScalar(0, 255, 255), fontThickness);
        CvInvoke.PutText(thumbnail, $"{Microns}um @ {BottomExposure}s/{NormalExposure}s", new Point(xSpacing, ySpacing * 3), fontFace, fontScale, EmguExtensions.WhiteColor, fontThickness);
        //CvInvoke.PutText(thumbnail, $"{ObjectCount} Objects", new Point(xSpacing, ySpacing * 4), fontFace, fontScale, EmguExtensions.WhiteColor, fontThickness);
            
        return thumbnail;
    }

    protected override bool ExecuteInternally(OperationProgress progress)
    {
        progress.ItemCount = LayerCount;
            
        var newLayers = new Layer[LayerCount];

        var layers = GetLayers();
        progress++;
            
        var layer = new Layer(0, layers[0], SlicerFile)
        {
            IsModified = true
        };

        uint layerIndex = 0;
        for (; layerIndex < _bottomLayers + _normalLayers; layerIndex++)
        {
            newLayers[layerIndex] = layer.Clone();
            progress++;
        }

        if (_decreaseImage)
        {
            var rect = WhiteBlock;
            for (int factor = 100 - _decreaseImageFactor; factor >= _minimumImageFactor; factor -= _decreaseImageFactor)
            {
                using var mat = layers[0].NewBlank();

                // size -  100
                //  x   - factor

                int width = rect.Width * factor / 100;
                int height = rect.Height * factor / 100;
                int x = (int)(SlicerFile.ResolutionX - width) / 2;
                int y = (int)(SlicerFile.ResolutionY - height) / 2;
                    
                CvInvoke.Rectangle(mat,
                    new Rectangle(x, y, width, height), 
                    EmguExtensions.WhiteColor, -1);

                newLayers[layerIndex] = new Layer(0, mat, SlicerFile)
                {
                    IsModified = true
                };

                layerIndex++;
                progress++;
            }
        }

        foreach (var mat in layers)
        {
            mat.Dispose();
        }

            
        if (SlicerFile.ThumbnailsCount > 0)
            SlicerFile.SetThumbnails(GetThumbnail());

        progress++;

        SlicerFile.SuppressRebuildPropertiesWork(() =>
        {
            SlicerFile.LayerHeight = (float)_layerHeight;
            SlicerFile.BottomExposureTime = (float)_bottomExposure;
            SlicerFile.ExposureTime = (float)_normalExposure;
            SlicerFile.BottomLiftHeight = (float)_bottomLiftHeight;
            SlicerFile.LiftHeight = (float)_liftHeight;
            SlicerFile.BottomLiftSpeed = (float)_bottomLiftSpeed;
            SlicerFile.LiftSpeed = (float)_liftSpeed;
            SlicerFile.RetractSpeed = (float)_retractSpeed;
            SlicerFile.BottomLayerCount = _bottomLayers;
            SlicerFile.TransitionLayerCount = 0;

            SlicerFile.Layers = newLayers;
        }, true);
            
        return !progress.Token.IsCancellationRequested;
    }

    #endregion
}