//
// 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;

namespace DsWordWeb.Demos
{
    // This example shows how to deal with the
    // pbb (paragraph-block-behavior) template formatter
    // should start and end in the same cell error.
    public class DataTplFixPbbNotInCell
    {
        // Code demonstrating the problem:
        GcWordDocument Problem()
        {
            using var oceans = File.OpenRead(Path.Combine("Resources", "data", "oceans.json"));
            var doc = new GcWordDocument();
            doc.DataTemplate.DataSources.Add("ds", oceans);
            // Define a 2x1 table:
            var table = doc.Body.Tables.Add(2, 1, doc.Styles[BuiltInStyleId.GridTable1Light]);
            var cell_00 = table[0, 0];
            var cell_01 = table[0, 1];
            // Put the start of the pbb range in the cell [0,0]:
            cell_00.GetRange().Paragraphs.Add("{{#ds.seas}:pbb()}{{ds.seas.name}} ");
            // Put the end of the pbb range in the cell [1,1]:
            cell_01.GetRange().Paragraphs.Add("{{/ds.seas}}");
            // Incorrect: a pbb range starts in one cell and ends in another:
            doc.DataTemplate.Process(CultureInfo.GetCultureInfo("en-US"));
            return doc;
        }

        // Code demonstrating the fix:
        GcWordDocument Fix()
        {
            using var oceans = File.OpenRead(Path.Combine("Resources", "data", "oceans.json"));
            var doc = new GcWordDocument();
            doc.DataTemplate.DataSources.Add("ds", oceans);
            // Define a 2x1 table:
            var table = doc.Body.Tables.Add(2, 1, doc.Styles[BuiltInStyleId.GridTable1Light]);
            var cell_00 = table[0, 0];
            // Put the start of the pbb range in the cell [0,0]:
            cell_00.GetRange().Paragraphs.Add("{{#ds.seas}:pbb()}{{ds.seas.name}} ");
            // Put the end of the pbb range in the same cell [0,0]:
            cell_00.GetRange().Paragraphs.Add("{{/ds.seas}}");
            // Correct: a pbb range starts and ends in the same table cell:
            doc.DataTemplate.Process(CultureInfo.GetCultureInfo("en-US"));
            return doc;
        }

        public GcWordDocument CreateDocx()
        {
            GcWordDocument doc;
            try
            {
                // This fails:
                doc = Problem();
            }
            catch (Exception ex)
            {
                // This works:
                doc = Fix();
                // Insert a brief explanation of the problem and the fix into the generated document:
                doc.Body.Paragraphs.Insert(
                    $"The error \"{ex.Message}\" occurred because a pbb (paragraph-block-behavior) formatter " +
                    $"started in one table cell and ended in another. A pbb formatter must start and end in the same table cell.",
                    doc.Styles[BuiltInStyleId.BlockText],
                    InsertLocation.Start);
            }
            return doc;
        }
    }
}