//------------------------------------------------------------------------------
// <copyright file="IXmlSerializable.cs" company="Microsoft">
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>
// <owner current="true" primary="true">[....]</owner>                                                                
//------------------------------------------------------------------------------

namespace System.Xml.Serialization.Advanced {

    using System.Xml.Schema;
    using System.Xml;
    using System.Collections;
    using System.Collections.Specialized;
    using System.CodeDom;
    using System.CodeDom.Compiler;
    using System.Xml.Serialization;

    /// <include file='doc\SchemaImporterExtension.uex' path='docs/doc[@for="SchemaImporterExtension"]/*' />
    ///<internalonly/>
    /// <devdoc>
    ///    <para>[To be supplied.]</para>
    /// </devdoc>
    public abstract class SchemaImporterExtension {
        /// <include file='doc\SchemaImporterExtension.uex' path='docs/doc[@for="SchemaImporterExtension.ImportSchemaType"]/*' />
        public virtual string ImportSchemaType(string name, string ns, XmlSchemaObject context, XmlSchemas schemas, XmlSchemaImporter importer, 
            CodeCompileUnit compileUnit, CodeNamespace mainNamespace, CodeGenerationOptions options, CodeDomProvider codeProvider) {
            return null;
        }

        /// <include file='doc\SchemaImporterExtension.uex' path='docs/doc[@for="SchemaImporterExtension.ImportSchemaType1"]/*' />
        public virtual string ImportSchemaType(XmlSchemaType type, XmlSchemaObject context, XmlSchemas schemas, XmlSchemaImporter importer,
            CodeCompileUnit compileUnit, CodeNamespace mainNamespace, CodeGenerationOptions options, CodeDomProvider codeProvider) {
            return null;
        }

        /// <include file='doc\SchemaImporterExtension.uex' path='docs/doc[@for="SchemaImporterExtension.ImportSchemaType1"]/*' />
        public virtual string ImportAnyElement(XmlSchemaAny any, bool mixed, XmlSchemas schemas, XmlSchemaImporter importer,
            CodeCompileUnit compileUnit, CodeNamespace mainNamespace, CodeGenerationOptions options, CodeDomProvider codeProvider) {
            return null;
        }

        /// <include file='doc\SchemaImporterExtension.uex' path='docs/doc[@for="SchemaImporterExtension.ImportDefaultValue"]/*' />
        public virtual CodeExpression ImportDefaultValue(string value, string type) {
            return null;
        }
    }

    public class SchemaImporterExtensionCollection : CollectionBase {
        Hashtable exNames;

        internal Hashtable Names {
            get {
                if (exNames == null)
                    exNames = new Hashtable();
                return exNames;
            }
        }

        public int Add(SchemaImporterExtension extension) {
            return Add(extension.GetType().FullName, extension);
        }

        public int Add(string name, Type type) {
            if (type.IsSubclassOf(typeof(SchemaImporterExtension))) {
                return Add(name, (SchemaImporterExtension)Activator.CreateInstance(type));
            }
            else {
                throw new ArgumentException(Res.GetString(Res.XmlInvalidSchemaExtension, type));
            }
        }
        
        public void Remove(string name) {
            if (Names[name] != null) {
                List.Remove(Names[name]);
                Names[name] = null;
            }
        }

        public new void Clear() {
            Names.Clear();
            List.Clear();
        }

        internal SchemaImporterExtensionCollection Clone() {
            SchemaImporterExtensionCollection clone = new SchemaImporterExtensionCollection();
            clone.exNames = (Hashtable)this.Names.Clone();
            foreach (object o in this.List) {
                clone.List.Add(o);
            }
            return clone;
        }

        public SchemaImporterExtension this[int index] {
            get { return (SchemaImporterExtension)List[index]; }
            set { List[index] = value; }
        }

        internal int Add(string name, SchemaImporterExtension extension) {
            if (Names[name] != null) {
                if (Names[name].GetType() != extension.GetType()) {
                    throw new InvalidOperationException(Res.GetString(Res.XmlConfigurationDuplicateExtension, name));
                }
                return -1;
            }
            Names[name] = extension;
            return List.Add(extension);
        }
        
        public void Insert(int index, SchemaImporterExtension extension) {
            List.Insert(index, extension);
        }
        
        public int IndexOf(SchemaImporterExtension extension) {
            return List.IndexOf(extension);
        }
        
        public bool Contains(SchemaImporterExtension extension) {
            return List.Contains(extension);
        }
        
        public void Remove(SchemaImporterExtension extension) {
            List.Remove(extension);
        }
        
        public void CopyTo(SchemaImporterExtension[] array, int index) {
            List.CopyTo(array, index);
        }
    }

    internal class MappedTypeDesc {
        string name;
        string ns;
        XmlSchemaType xsdType;
        XmlSchemaObject context;
        string clrType;
        SchemaImporterExtension extension;
        CodeNamespace code;
        bool exported = false;
        StringCollection references;

        internal MappedTypeDesc(string clrType, string name, string ns, XmlSchemaType xsdType, XmlSchemaObject context, SchemaImporterExtension extension, CodeNamespace code, StringCollection references) {
            this.clrType = clrType.Replace('+', '.');
            this.name = name;
            this.ns = ns;
            this.xsdType = xsdType;
            this.context = context;
            this.code = code;
            this.references = references;
            this.extension = extension;
        }

        internal SchemaImporterExtension Extension { get { return extension; } }
        internal string Name { get { return clrType; } }
        
        internal StringCollection ReferencedAssemblies { 
            get { 
                if (references == null)
                    references = new StringCollection();
                return references; 
            } 
        }

        internal CodeTypeDeclaration ExportTypeDefinition(CodeNamespace codeNamespace, CodeCompileUnit codeCompileUnit) {
            if (exported)
                return null;
            exported = true;

            foreach(CodeNamespaceImport import in code.Imports) {
                codeNamespace.Imports.Add(import);
            }
            CodeTypeDeclaration codeClass = null;
            string comment = Res.GetString(Res.XmlExtensionComment, extension.GetType().FullName);
            foreach(CodeTypeDeclaration type in code.Types) {
                if (clrType == type.Name) {
                    if (codeClass != null)
                        throw new InvalidOperationException(Res.GetString(Res.XmlExtensionDuplicateDefinition, extension.GetType().FullName, clrType));
                    codeClass = type;
                }
                type.Comments.Add(new CodeCommentStatement(comment, false));
                codeNamespace.Types.Add(type);
            }
            if (codeCompileUnit != null) {
                foreach(string reference in ReferencedAssemblies) {
                    if (codeCompileUnit.ReferencedAssemblies.Contains(reference))
                        continue;
                    codeCompileUnit.ReferencedAssemblies.Add(reference);
                }
            }
            return codeClass;
        }
    }
}