﻿// Copyright (c) 2015, Alexander Endris
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 
// * Redistributions of source code must retain the above copyright notice, this
//   list of conditions and the following disclaimer.
// 
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
// 
// * Neither the name of RosMockLyn nor the names of its
//   contributors may be used to endorse or promote products derived from
//   this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
using System;
using System.Linq;

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp.Syntax;

namespace RosMockLyn.Core.Helpers
{
    internal static class NameHelper
    {
        public static IdentifierNameSyntax GetBaseInterfaceIdentifier(SyntaxNode node)
        {
            if (node == null)
                throw new ArgumentNullException("node");

            var typeDeclarationSyntax =
                (TypeDeclarationSyntax)node.AncestorsAndSelf().OfType<ClassDeclarationSyntax>().Single();
                                                        
            var identifierNameSyntax = (IdentifierNameSyntax)typeDeclarationSyntax.BaseList.Types[1].Type;

            return identifierNameSyntax;
        }

        public static string GetMockImplementationName(SyntaxNode node, string suffix = "Mock")
        {
            if (node == null)
                throw new ArgumentNullException("node");

            if (string.IsNullOrWhiteSpace(suffix))
                throw new ArgumentNullException("suffix");

            var typeDeclarationSyntax = GetTypeDeclaration(node);

            return GenerateMockName(suffix, typeDeclarationSyntax);
        }

        public static string GetInterfaceName(SyntaxNode node)
        {
            if (node == null)
                throw new ArgumentNullException("node");

            var typeDeclarationSyntax = (TypeDeclarationSyntax)node.DescendantNodesAndSelf()
                                        .OfType<InterfaceDeclarationSyntax>()
                                        .Single();

            return typeDeclarationSyntax.Identifier.ToString();
        }

        public static string GetFullyQualifiedNamespace(SyntaxNode node)
        {
            if (node == null)
                throw new ArgumentNullException("node");
            
            var namespaceDeclaration = node.SyntaxTree.GetRoot()
                                        .DescendantNodesAndSelf()
                                        .OfType<NamespaceDeclarationSyntax>()
                                        .Single();

            return namespaceDeclaration.Name.ToString();
        }

        private static string GenerateMockName(string suffix, TypeDeclarationSyntax typeDeclarationSyntax)
        {
            var interfaceName = typeDeclarationSyntax.Identifier.ToString();

            return interfaceName.Substring(1) + suffix;
        }

        private static TypeDeclarationSyntax GetTypeDeclaration(SyntaxNode node)
        {
            var typeDeclarationSyntax =
                (TypeDeclarationSyntax)node.DescendantNodesAndSelf().OfType<InterfaceDeclarationSyntax>().Single();
            return typeDeclarationSyntax;
        }
    }
}