/*!
 *  Make the given enum type implements the protocol RawRepresentable.
 *  TODO Only one member is added for test case, add the rest members
 */
static void makeRawRepresentable(const TypeBuilderPtr& type, GlobalScope* global)
{
    type->addProtocol(global->RawRepresentable());
    //var rawValue: RawValue { get }
    TypePtr RawValue = type->getParentType();
    SymbolPlaceHolderPtr rawValue(new SymbolPlaceHolder(L"rawValue", RawValue, SymbolPlaceHolder::R_PROPERTY, SymbolFlagMember | SymbolFlagReadable));
    type->addMember(rawValue);
}
TypePtr DeclarationAnalyzer::defineType(const std::shared_ptr<TypeDeclaration>& node)
{
    TypeIdentifierPtr id = node->getIdentifier();

    //Analyze the type's category
    Type::Category category;
    switch(node->getNodeType())
    {
        case NodeType::Enum:
            category = Type::Enum;
            break;
        case NodeType::Class:
            category = Type::Class;
            break;
        case NodeType::Struct:
            category = Type::Struct;
            break;
        case NodeType::Protocol:
            category = Type::Protocol;
            break;
        default:
            assert(0 && "Impossible to execute here.");
    }

    //it's inside the type's scope, so need to access parent scope;

    //prepare for generic types
    GenericParametersDefPtr genericParams = node->getGenericParametersDef();

    //check if it's defined as a nested type
    if(ctx->currentType)
    {
        if(genericParams)
        {
            error(node, Errors::E_GENERIC_TYPE_A_NESTED_IN_TYPE_B_IS_NOT_ALLOWED_2, id->getName(), ctx->currentType->getName());
            return nullptr;
        }
        if(ctx->currentType->isGenericType())
        {
            error(node, Errors::E_TYPE_A_NESTED_IN_GENERIC_TYPE_B_IS_NOT_ALLOWED_2, id->getName(), ctx->currentType->getName());
            return nullptr;
        }
    }
    
    //register this type
    SymbolScope* currentScope = symbolRegistry->getCurrentScope();
    TypeBuilderPtr type = static_pointer_cast<TypeBuilder>(currentScope->getForwardDeclaration(id->getName()));
    S_ASSERT(type == nullptr);
    type = static_pointer_cast<TypeBuilder>(Type::newType(id->getName(), category));
    currentScope->addForwardDeclaration(type);
    TypeDeclarationPtr tnode = dynamic_pointer_cast<TypeDeclaration>(node);
    type->setReference(tnode);    
    if(tnode)
        tnode->setType(type);

    assert(type != nullptr);
    assert(type->getCategory() == category);
    //prepare for generic
    if(!type->getGenericDefinition() && node->getGenericParametersDef())
    {
        GenericParametersDefPtr genericParams = node->getGenericParametersDef();
        GenericDefinitionPtr generic = prepareGenericTypes(genericParams);
        generic->registerTo(type->getScope());
        type->setGenericDefinition(generic);
    }
    
    if(node->hasModifier(DeclarationModifiers::Final))
        type->setFlags(SymbolFlagFinal, true);
    static_pointer_cast<TypeBuilder>(type)->setModuleName(ctx->currentModule->getName());
    ctx->allTypes.push_back(type);
    
    //check inheritance clause
    {
        TypePtr parent = nullptr;
        bool first = true;

        ScopeGuard scope(symbolRegistry, type->getScope());
        SCOPED_SET(ctx->currentType, type);
        for(const TypeIdentifierPtr& parentType : node->getParents())
        {
            parentType->accept(this);
            if(first)
                declareImmediately(parentType->getName());
            TypePtr ptr = resolveType(parentType, true);
            Type::Category pcategory = ptr->getCategory();
            if(pcategory == Type::Specialized)
                pcategory = ptr->getInnerType()->getCategory();
            if(pcategory == Type::Class && category == Type::Class)
            {
                if(!first)
                {
                    //only the first type can be class type
                    error(parentType, Errors::E_SUPERCLASS_MUST_APPEAR_FIRST_IN_INHERITANCE_CLAUSE_1, toString(parentType));
                    return nullptr;
                }
                parent = ptr;
                if(parent->hasFlags(SymbolFlagFinal))
                {
                    error(parentType, Errors::E_INHERITANCE_FROM_A_FINAL_CLASS_A_1, parentType->getName());
                    return nullptr;
                }
            }
            else if(category == Type::Enum && pcategory != Type::Protocol)
            {

                if(parent)//already has a raw type
                {
                    error(parentType, Errors::E_MULTIPLE_ENUM_RAW_TYPES_A_AND_B_2, parent->toString(), ptr->toString());
                    return nullptr;
                }
                if(!first)
                {
                    error(parentType, Errors::E_RAW_TYPE_A_MUST_APPEAR_FIRST_IN_THE_ENUM_INHERITANCE_CLAUSE_1, ptr->toString());
                    return nullptr;
                }
                //check if the raw type is literal convertible
                if(!isLiteralTypeForEnum(symbolRegistry->getGlobalScope(), ptr))
                {
                    error(parentType, Errors::E_RAW_TYPE_A_IS_NOT_CONVERTIBLE_FROM_ANY_LITERAL_1, ptr->toString());
                    return nullptr;
                }
                if(!ptr->canAssignTo(symbolRegistry->getGlobalScope()->Equatable()))
                {
                    error(parentType, Errors::E_RAWREPRESENTABLE_INIT_CANNOT_BE_SYNTHESIZED_BECAUSE_RAW_TYPE_A_IS_NOT_EQUATABLE_1, ptr->toString());
                    return nullptr;
                }
                parent = ptr;
            }
            else if(pcategory == Type::Protocol)
            {
                type->addProtocol(ptr);
            }
            else
            {
                if(category == Type::Class)
                    error(parentType, Errors::E_INHERITANCE_FROM_NONE_PROTOCOL_NON_CLASS_TYPE_1, toString(parentType));
                else
                    error(parentType, Errors::E_INHERITANCE_FROM_NONE_PROTOCOL_TYPE_1, toString(parentType));
                return nullptr;
            }
            first = false;
        }

        type->setParentType(parent);
        if(parent && parent->getAccessLevel() == AccessLevelPublic && (node->getModifiers() & DeclarationModifiers::AccessModifiers) == 0)
            type->setAccessLevel(AccessLevelPublic);//when access level is undefined, try to inherit base's access level
        else
            type->setAccessLevel(parseAccessLevel(node->getModifiers()));
    }
    

    declarationFinished(type->getName(), type, node);
    return type;
}