//---------------------------------------------------------------------
// <copyright file="XmlSchemaResource.cs" company="Microsoft">
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>
//
// @owner       [....]
// @backupOwner [....]
//---------------------------------------------------------------------
using System.Diagnostics;
using System.Data.Mapping;
using System.Data.Metadata.Edm;
using System.Collections.Generic;

namespace System.Data.EntityModel.SchemaObjectModel
{
    internal struct XmlSchemaResource
    {
        private static XmlSchemaResource[] EmptyImportList = new XmlSchemaResource[0];
        public XmlSchemaResource(string namespaceUri, string resourceName, XmlSchemaResource[] importedSchemas)
        {
            Debug.Assert(!string.IsNullOrEmpty(namespaceUri), "namespaceUri is null or empty");
            Debug.Assert(!string.IsNullOrEmpty(resourceName), "resourceName is null or empty");
            Debug.Assert(importedSchemas != null, "importedSchemas is null");
            NamespaceUri = namespaceUri;
            ResourceName = resourceName;
            ImportedSchemas = importedSchemas;
        }
        public XmlSchemaResource(string namespaceUri, string resourceName)
        {
            Debug.Assert(!string.IsNullOrEmpty(namespaceUri), "namespaceUri is null or empty");
            Debug.Assert(!string.IsNullOrEmpty(resourceName), "resourceName is null or empty");
            NamespaceUri = namespaceUri;
            ResourceName = resourceName;
            ImportedSchemas = EmptyImportList;
        }
        internal string NamespaceUri;
        internal string ResourceName;
        internal XmlSchemaResource[] ImportedSchemas;


        /// <summary>
        /// Builds a dictionary from XmlNamespace to XmlSchemaResource of both C and S space schemas
        /// </summary>
        /// <returns>The built XmlNamespace to XmlSchemaResource dictionary.</returns>
        internal static Dictionary<string, XmlSchemaResource> GetMetadataSchemaResourceMap(double schemaVersion)
        {
            Dictionary<string, XmlSchemaResource> schemaResourceMap = new Dictionary<string, XmlSchemaResource>(StringComparer.Ordinal);
            AddEdmSchemaResourceMapEntries(schemaResourceMap, schemaVersion);
            AddStoreSchemaResourceMapEntries(schemaResourceMap, schemaVersion);
            return schemaResourceMap;
        }

        /// <summary>
        /// Adds Store schema resource entries to the given XmlNamespace to XmlSchemaResoure map
        /// </summary>
        /// <param name="schemaResourceMap">The XmlNamespace to XmlSchemaResource map to add entries to.</param>
        internal static void AddStoreSchemaResourceMapEntries(Dictionary<string, XmlSchemaResource> schemaResourceMap, double schemaVersion)
        {
            XmlSchemaResource[] ssdlImports = { new XmlSchemaResource(XmlConstants.EntityStoreSchemaGeneratorNamespace, "System.Data.Resources.EntityStoreSchemaGenerator.xsd") };
 
            XmlSchemaResource ssdlSchema = new XmlSchemaResource(XmlConstants.TargetNamespace_1, "System.Data.Resources.SSDLSchema.xsd", ssdlImports);
            schemaResourceMap.Add(ssdlSchema.NamespaceUri, ssdlSchema);

            if (schemaVersion >= XmlConstants.StoreVersionForV2)
            {
                XmlSchemaResource ssdlSchema2 = new XmlSchemaResource(XmlConstants.TargetNamespace_2, "System.Data.Resources.SSDLSchema_2.xsd", ssdlImports);
                schemaResourceMap.Add(ssdlSchema2.NamespaceUri, ssdlSchema2);
            }

            if (schemaVersion >= XmlConstants.StoreVersionForV3)
            {
                Debug.Assert(XmlConstants.SchemaVersionLatest == XmlConstants.StoreVersionForV3, "Did you add a new schema version");

                XmlSchemaResource ssdlSchema3 = new XmlSchemaResource(XmlConstants.TargetNamespace_3, "System.Data.Resources.SSDLSchema_3.xsd", ssdlImports);
                schemaResourceMap.Add(ssdlSchema3.NamespaceUri, ssdlSchema3);
            }

            XmlSchemaResource providerManifest = new XmlSchemaResource(XmlConstants.ProviderManifestNamespace, "System.Data.Resources.ProviderServices.ProviderManifest.xsd");
            schemaResourceMap.Add(providerManifest.NamespaceUri, providerManifest);
        }

        /// <summary>
        /// Adds Mapping schema resource entries to the given XmlNamespace to XmlSchemaResoure map
        /// </summary>
        /// <param name="schemaResourceMap">The XmlNamespace to XmlSchemaResource map to add entries to.</param>
        internal static void AddMappingSchemaResourceMapEntries(Dictionary<string, XmlSchemaResource> schemaResourceMap, double schemaVersion)
        {
            XmlSchemaResource msl1 = new XmlSchemaResource(StorageMslConstructs.NamespaceUriV1, StorageMslConstructs.ResourceXsdNameV1);
            schemaResourceMap.Add(msl1.NamespaceUri, msl1);

            if (schemaVersion >= XmlConstants.EdmVersionForV2)
            {
                XmlSchemaResource msl2 = new XmlSchemaResource(StorageMslConstructs.NamespaceUriV2, StorageMslConstructs.ResourceXsdNameV2);
                schemaResourceMap.Add(msl2.NamespaceUri, msl2);
            }

            if (schemaVersion >= XmlConstants.EdmVersionForV3)
            {
                Debug.Assert(XmlConstants.SchemaVersionLatest == XmlConstants.EdmVersionForV3, "Did you add a new schema version");
                XmlSchemaResource msl3 = new XmlSchemaResource(StorageMslConstructs.NamespaceUriV3, StorageMslConstructs.ResourceXsdNameV3);
                schemaResourceMap.Add(msl3.NamespaceUri, msl3);
            }
        }

        /// <summary>
        /// Adds Edm schema resource entries to the given XmlNamespace to XmlSchemaResoure map,
        /// when calling from SomSchemaSetHelper.ComputeSchemaSet(), all the imported xsd will be included
        /// </summary>
        /// <param name="schemaResourceMap">The XmlNamespace to XmlSchemaResource map to add entries to.</param>
        internal static void AddEdmSchemaResourceMapEntries(Dictionary<string, XmlSchemaResource> schemaResourceMap, double schemaVersion)
        {
            XmlSchemaResource[] csdlImports = { new XmlSchemaResource(XmlConstants.CodeGenerationSchemaNamespace, "System.Data.Resources.CodeGenerationSchema.xsd") };
            
            XmlSchemaResource[] csdl2Imports = { 
                new XmlSchemaResource(XmlConstants.CodeGenerationSchemaNamespace, "System.Data.Resources.CodeGenerationSchema.xsd"),
                new XmlSchemaResource(XmlConstants.AnnotationNamespace, "System.Data.Resources.AnnotationSchema.xsd") };

            XmlSchemaResource[] csdl3Imports = { 
                new XmlSchemaResource(XmlConstants.CodeGenerationSchemaNamespace, "System.Data.Resources.CodeGenerationSchema.xsd"),
                new XmlSchemaResource(XmlConstants.AnnotationNamespace, "System.Data.Resources.AnnotationSchema.xsd") };

            XmlSchemaResource csdlSchema_1 = new XmlSchemaResource(XmlConstants.ModelNamespace_1, "System.Data.Resources.CSDLSchema_1.xsd", csdlImports);
            schemaResourceMap.Add(csdlSchema_1.NamespaceUri, csdlSchema_1);

            XmlSchemaResource csdlSchema_1_1 = new XmlSchemaResource(XmlConstants.ModelNamespace_1_1, "System.Data.Resources.CSDLSchema_1_1.xsd", csdlImports);
            schemaResourceMap.Add(csdlSchema_1_1.NamespaceUri, csdlSchema_1_1);

            if (schemaVersion >= XmlConstants.EdmVersionForV2)
            {
                XmlSchemaResource csdlSchema_2 = new XmlSchemaResource(XmlConstants.ModelNamespace_2, "System.Data.Resources.CSDLSchema_2.xsd", csdl2Imports);
                schemaResourceMap.Add(csdlSchema_2.NamespaceUri, csdlSchema_2);
            }

            if (schemaVersion >= XmlConstants.EdmVersionForV3)
            {
                Debug.Assert(XmlConstants.SchemaVersionLatest == XmlConstants.EdmVersionForV3, "Did you add a new schema version");

                XmlSchemaResource csdlSchema_3 = new XmlSchemaResource(XmlConstants.ModelNamespace_3, "System.Data.Resources.CSDLSchema_3.xsd", csdl3Imports);
                schemaResourceMap.Add(csdlSchema_3.NamespaceUri, csdlSchema_3);
            }
        }
    }
}