using System;
using System.Collections.Generic;
using System.Text;
using DocumentFormat.OpenXml.Drawing;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Presentation;
using ClearSlideLibrary.Dom.PPTTexts;
using Shape = DocumentFormat.OpenXml.Presentation.Shape;
using TextBody = DocumentFormat.OpenXml.Presentation.TextBody;
using DocumentFormat.OpenXml;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;

namespace ClearSlideLibrary.Dom
{
    public class PPTShape : PPTShapeBase
    {
        // contains values of type: slideIndex_shapeId
        public static LinkedList<string> effectShapes = new LinkedList<string>();
        private const double RotationIndex = 60000;
        private const string PictureBulletDirName = "PictureBullet";

        public Boolean IsText { get; set; }
        public PPTSlide slide { get; set; }
        private PlaceholderShape placeholder;

        // Create a new linked list of strings.
        public LinkedList<PPTParagraph> Texts = new LinkedList<PPTParagraph>();

        public PPTShape(SlidePart slidePart, Shape shape, PPTSlide slide): base()
        {
            this.slide = slide;

            SetShapeVisualProperties(slidePart, shape);
            SetShapeNonVisualProperties(slidePart, shape);
            SetSpecificProperties(slidePart, shape);

        }


        private void SetShapeNonVisualProperties(SlidePart slidePart, Shape shape)
        {

            if (shape.NonVisualShapeProperties.NonVisualDrawingProperties.HyperlinkOnClick != null)

                foreach (HyperlinkRelationship link in slidePart.HyperlinkRelationships)
                {
                    if (link.Id.Equals(shape.NonVisualShapeProperties.NonVisualDrawingProperties.HyperlinkOnClick.Id))
                    {
                        ClickLinkUrl = link.Uri.IsAbsoluteUri ? link.Uri.AbsoluteUri : link.Uri.OriginalString;

                    }
                }
            if (shape.NonVisualShapeProperties.NonVisualDrawingProperties.HyperlinkOnHover != null)
                foreach (HyperlinkRelationship link in slidePart.HyperlinkRelationships)
                {
                    if (link.Id.Equals(shape.NonVisualShapeProperties.NonVisualDrawingProperties.HyperlinkOnHover.Id))
                    {
                        HoverLinkUrl = link.Uri.IsAbsoluteUri ? link.Uri.AbsoluteUri : link.Uri.OriginalString;
                    }
                }

            var nonVisualShapeProp = new PPTNonVisualShapeProp
                                         {
                                             Id = "s1s" + //HARD CODED: we split it into separate HTML files!
                                                  shape.NonVisualShapeProperties.NonVisualDrawingProperties.Id,
                                             Name = shape.LocalName,
                                             Type = "PPTShape"
                                         };
            base.NonVisualShapeProp = nonVisualShapeProp;
        }

        private void SetShapeVisualProperties(SlidePart slidePart, Shape shape)
        {

            if (shape.NonVisualShapeProperties.ApplicationNonVisualDrawingProperties.PlaceholderShape != null)
            {
                placeholder = shape.NonVisualShapeProperties.ApplicationNonVisualDrawingProperties.
                                        PlaceholderShape;
                if (placeholder.Type == null)
                    placeholder.Type = PlaceholderValues.Body;
            }


            base.VisualShapeProp = new PPTVisualPPTShapeProp();
            base.SetSlideLayoutVisualShapeProperties(slidePart, shape);
            if (shape.ShapeProperties.Transform2D != null)
            {
                Int32Value rot = shape.ShapeProperties.Transform2D.Rotation;
                if (rot != null)
                {
                    double degrees = Math.Round(rot / RotationIndex);
                    if (degrees < 0)
                    {
                        degrees = 360 + degrees;
                    }
                    base.VisualShapeProp.Rotate = degrees;
                }

                base.VisualShapeProp.Extents = shape.ShapeProperties.Transform2D.Extents;
                base.VisualShapeProp.Offset = shape.ShapeProperties.Transform2D.Offset;
            }
        }

        private void SetSpecificProperties(SlidePart slidePart, Shape shape)
        {
            IsText = true;
            //Check if this is text
            if (shape.TextBody == null)
            {
                IsText = false;
                return;
            }

            if (shape.TextBody.BodyProperties != null)
            {
                if (shape.TextBody.BodyProperties.Anchor != null)
                    VerticalAlign = shape.TextBody.BodyProperties.Anchor;
                if (shape.TextBody.BodyProperties.GetFirstChild<NormalAutoFit>() != null &&
                    shape.TextBody.BodyProperties.GetFirstChild<NormalAutoFit>().FontScale != null)
                    fontScale = shape.TextBody.BodyProperties.GetFirstChild<NormalAutoFit>().FontScale.Value;

            }
            int index = 0;
            foreach (var paragraph in shape.TextBody.Descendants<Paragraph>())
            {
                var par = new PPTParagraph(slide, placeholder)
                {
                    Paragraph = index++
                };

                if (paragraph.ParagraphProperties != null)
                {
                    int level = paragraph.ParagraphProperties.Level == null ?
                               -1 : paragraph.ParagraphProperties.Level.Value;
                    par.Level = level;
                }

                par.SetParagraphProperties(paragraph, slidePart,
                                           shapeListStyleMaster, shapeListStyleLayout);
                bool hasText = false;
                foreach (var obj in paragraph.ChildElements)
                {
                    hasText = GetParagraphChildElements(shape, par, hasText, obj);
                }
                //This is because when we set paragraph properties we add the bullet to the text runs.
                //If we don't have text it still outputs the bullet character. 
                if (par.bullet != null && hasText)
                {
                    par.RunPropList.Insert(0, par.bullet);
                }
                Texts.AddLast(par);
            }
        }

        private bool GetParagraphChildElements(Shape shape, PPTParagraph par, bool hasText, OpenXmlElement obj)
        {
            if (obj is Run)
            {
                Run run = (Run)obj;
                hasText = true;
                PPTRunProperties runProp = new PPTRunProperties(par.defaultRunProperties);
                runProp.Text = run.Text.Text;
                runProp.SetRunProperties(run.RunProperties, shape, ref effectShapes);
                runProp.FontSize = Math.Round(fontScale * runProp.FontSize / Globals.PercentageConstant);
                par.RunPropList.Add(runProp);
            }

            else if (obj is Field)
            {
                Field run = (Field)obj;
                hasText = true;
                PPTRunProperties runProp = new PPTRunProperties(par.defaultRunProperties);
                runProp.Text = run.Text.Text;
                runProp.SetRunProperties(run.RunProperties, shape, ref effectShapes);
                runProp.FontSize = Math.Round(fontScale * runProp.FontSize / Globals.PercentageConstant);
                par.RunPropList.Add(runProp);
            }

            else if (obj is Break)
            {
                Break aBreak = (Break)obj;
                PPTRunProperties runProp = new PPTRunProperties(par.defaultRunProperties);
                runProp.SetRunProperties(aBreak.RunProperties, shape, ref effectShapes);
                runProp.FontSize = Math.Round(fontScale * runProp.FontSize / Globals.PercentageConstant);
                runProp.isBreak = true;
                par.RunPropList.Add(runProp);
            }
            return hasText;
        }
    }
}