using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.Xml.Serialization;
using System.Xml.Serialization.Advanced;
using System.Xml.Schema;
using System.CodeDom.Compiler;
using System.CodeDom;
using System.Collections;

namespace SchemasTools.Pocketsoap.Com
{    
    public class SfSchemaImporter : SchemaImporterExtension
    {
        private Dictionary<XmlQualifiedName, string> types = new Dictionary<XmlQualifiedName, string>();

        public override string ImportSchemaType(string name, 
            string ns, 
            System.Xml.Schema.XmlSchemaObject context, 
            XmlSchemas schemas, 
            XmlSchemaImporter importer, 
            System.CodeDom.CodeCompileUnit compileUnit, 
            System.CodeDom.CodeNamespace mainNamespace, 
            CodeGenerationOptions options, 
            System.CodeDom.Compiler.CodeDomProvider codeProvider)
        {
            XmlQualifiedName qn = new XmlQualifiedName(name, ns);
            string type;
            if (types.TryGetValue(qn, out type))
                return type;

            XmlSchemaComplexType ct = (XmlSchemaComplexType)schemas.Find(qn, typeof(XmlSchemaComplexType));
            if (ct == null) return null;

            Console.WriteLine("Generating type {0}", ct.Name);
            String codeTypeName = codeProvider.CreateValidIdentifier(ct.Name);
            types[qn] = codeTypeName;
            CreateComplexType(mainNamespace, codeTypeName, qn, ct);
            return codeTypeName;
        }

        protected void CreateComplexType(
            CodeNamespace mainNamespace, 
            string codeTypeName, 
            XmlQualifiedName qn, 
            XmlSchemaComplexType ct)
        {
            // for now we just create the definition of an empty class
            CodeTypeDeclaration cls = new CodeTypeDeclaration(codeTypeName);
            cls.IsClass = true;
            cls.IsPartial = true;
            cls.Attributes = MemberAttributes.Public;
            Console.WriteLine("adding {0} to mainNamespace", codeTypeName);
            mainNamespace.Types.Add(cls);
        }
    }
}