using System;
using System.IO;
using System.Xml;
using System.Xml.Xsl;

namespace XSLTEvaluator
{
    public class MainClass
    {
        public static void Main(string[] Args)
        {
            var transform = new XslCompiledTransform();

            using (var xsl_stream = new FileStream(Args[0], FileMode.Open))
            {
                var xsl_reader = XmlReader.Create(xsl_stream);
                Console.WriteLine("Loading XSL file: " + Args[0]);

                // We need to patch up xdTextBox elements into actual HTML text entries
                var xsl_document = new XmlDocument();
                xsl_document.Load(xsl_reader);

                // We modify this list later, so we can't rely on the enumerator in the loop
                var spans = xsl_document.GetElementsByTagName("span");
                var possible_textboxes = new XmlNode[spans.Count];
                for (var i = 0; i < spans.Count; i++)
                {
                    possible_textboxes[i] = (XmlNode)spans[i];
                }

                foreach (var possible_textbox in possible_textboxes)
                {
                    var class_attr = possible_textbox.Attributes.GetNamedItem("class");
                    if (class_attr != null && class_attr.Value == "xdTextBox")
                    {
                        Console.WriteLine("... Preparing to replace <span ... class=\"xdTexBox\" ...> with <input>");

                        var new_textbox = xsl_document.CreateElement("input");

                        var new_attributes = new XmlAttribute[possible_textbox.Attributes.Count];
                        possible_textbox.Attributes.CopyTo(new_attributes, 0);
                        foreach (var new_attribute in new_attributes)
                        {
                            new_textbox.Attributes.Append(new_attribute);
                        }

                        Console.WriteLine("... Copied " + new_attributes.Length + " attributes");

                        var new_textbox_type_attr = xsl_document.CreateAttribute("type");
                        new_textbox_type_attr.Value = "input";
                        new_textbox.Attributes.Append(new_textbox_type_attr);
                        new_textbox.InnerXml = possible_textbox.InnerXml;

                        Console.WriteLine("... Performing replacement");
                        possible_textbox.ParentNode.InsertAfter(new_textbox, possible_textbox);
                        possible_textbox.ParentNode.RemoveChild(possible_textbox);
                    }
                }

                transform.Load(xsl_document);
            }

            using (var xml_stream = new FileStream(Args[1], FileMode.Open))
            {
                Console.WriteLine("Loading XML template: " + Args[1]);
                var xml_reader = XmlReader.Create(xml_stream);

                Console.WriteLine("Generating out.html");
                var xml_writer = XmlWriter.Create("out.html");
                transform.Transform(xml_reader, xml_writer);
            }
        }
    }
}