//
// This code is part of Document Solutions for Word demos.
// Copyright (c) MESCIUS inc. All rights reserved.
//
using System;
using System.IO;
using System.Drawing;
using System.Collections.Generic;
using System.Linq;
using System.Globalization;
using GrapeCity.Documents.Word;
using GrapeCity.Documents.Word.Fields;

namespace DsWordWeb.Demos
{
    // This sample shows how to add a TOC (Table of Contents) to a Word document,
    // and specify its options.
    public class TocFieldOpts
    {
        public GcWordDocument CreateDocx()
        {
            var doc = new GcWordDocument();

            // The TocFieldOptions class provides a convenient strong-typed access
            // to tocOpts specific to the 'TOC' MS Word field.
            var tocOpts = new TocFieldOptions(doc);
            tocOpts.EntryFormatting.CreateHyperlink = true;
            // build TOC with paragraphs that formatted only 'Heading 1' or 'Heading 2' or 'Heading 3' styles
            foreach (TocStyleLevel style in tocOpts.Styles)
            {
                switch (style.Level)
                {
                    case OutlineLevel.Level1:
                    case OutlineLevel.Level2:
                    case OutlineLevel.Level3:
                        style.Collect = true;
                        break;
                    default:
                        style.Collect = false;
                        break;
                }
            }

            // Add TOC and a section break to the document:
            var toc = doc.Body.Paragraphs.Add().AddComplexField(tocOpts);
            doc.Body.Paragraphs.Last().AddSectionBreak();

            // Create random content with 3 levels of headers:
            var rnd = Util.NewRandom();
            for (int i = 0; i < rnd.Next(2, 4); i++)
            {
                var p = doc.Body.AddParagraph($"This is top-level header {i + 1}", doc.Styles[BuiltInStyleId.Heading1]);
                var par = Util.LoremIpsumPar();
                doc.Body.AddParagraph(par);
                for (int j = 0; j < rnd.Next(3, 5); j++)
                {
                    p = doc.Body.AddParagraph($"This is second-level header {j + 1}", doc.Styles[BuiltInStyleId.Heading2]);
                    par = Util.LoremIpsumPar();
                    doc.Body.AddParagraph(par);
                    for (int k = 0; k < rnd.Next(2, 3); k++)
                    {
                        p = doc.Body.AddParagraph($"This is third-level header {k + 1}", doc.Styles[BuiltInStyleId.Heading3]);
                        par = Util.LoremIpsumPar();
                        doc.Body.AddParagraph(par);
                    }
                }
            }

            // For reference add a simple page header with page number to the document:
            var phdr = doc.Body.Sections.First.Headers[HeaderFooterType.Primary].Body.AddParagraph(doc.Styles[BuiltInStyleId.Closing]);
            phdr.AddComplexField(new PageFieldOptions(doc) { NumberFormat = "'Page '0" });

            // Update fields using a specific culture:
            doc.UpdateFields(new GrapeCity.Documents.Word.Layout.WordLayoutSettings() { FontCollection = Util.FontCollection, Culture = CultureInfo.GetCultureInfo("en-US") });

            // Done:
            return doc;
        }
    }
}