using DocumentFormat.OpenXml.Packaging;
using HTEXLib.Builders;
using HTEXLib.Controller;
using HTEXLib.Models;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml.Linq;

namespace HTEXLib.Translator
{
    public   class PPTX2HTEXTranslator
    {
        /// <summary>
        /// pptx官方的js操作相关接口。 https://docs.microsoft.com/zh-cn/javascript/api/powerpoint?view=powerpoint-js-preview
        /// </summary>
        /// <param name="stream"></param>
        /// <returns></returns>
        public Htex Translate(Stream stream) {
            PresentationDocument presentation;
            var htexBuilder = new HtexBuilder();
            try {

                XDocument document = XDocument.Load(stream);
                presentation = PresentationDocument.FromFlatOpcDocument(document);
            } catch {
                presentation = PresentationDocument.Open(stream, false,openSettings:new OpenSettings { });
                presentation = PresentationDocument.Open(stream, false);
            }
            var pptSlides = htexBuilder.GetPPTSlides(presentation);
            double width = htexBuilder.getSlideWidth();
            double height = htexBuilder.getSlideHeight();
            int slideCounter = 1;
            Htex htex = htexBuilder.Htex;
            htex.page = pptSlides.Count;
            htex.size = new HtexSize { width = width, height = height };
            List<Slide> slides = new List<Slide>();
            List<string> lazyFiles = new List<string>();
            foreach (PPTSlide pptSlide in pptSlides)
            {
                var htexController = new HtexController(pptSlide, slideCounter, pptSlides.Count)
                {
                    SlideWidth = width,
                    SlideHeight = height
                };
                Slide slide = htexController.GenerateHtex();
                slide.width = width;
                slide.transition = pptSlide.slideTransition;
                slide.height = height;
                slide.help = pptSlide.note;
                slides.Add(slide);
                slideCounter++;
                lazyFiles.AddRange(pptSlide.lazyFiles);
            }
            foreach(var lzfie in lazyFiles)
            {
                htex.stores[lzfie] = new Store { path = lzfie, isLazy = true, contentType = null, url = null };
            }
            htexBuilder.presentationDocument.Close();
            GC.Collect();
            htex.slides = slides;
            htex.page = slides.Count;
            return htex;
        }
       
    }
}