//===-- JavaLanguage.cpp ----------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// C Includes
#include <string.h>
// C++ Includes
#include <functional>
#include <mutex>

// Other libraries and framework includes
#include "llvm/ADT/StringRef.h"

// Project includes
#include "JavaFormatterFunctions.h"
#include "JavaLanguage.h"
#include "lldb/Core/ConstString.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/DataFormatters/DataVisualization.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
#include "lldb/Symbol/JavaASTContext.h"

using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;

void
JavaLanguage::Initialize()
{
    PluginManager::RegisterPlugin(GetPluginNameStatic(), "Java Language", CreateInstance);
}

void
JavaLanguage::Terminate()
{
    PluginManager::UnregisterPlugin(CreateInstance);
}

lldb_private::ConstString
JavaLanguage::GetPluginNameStatic()
{
    static ConstString g_name("Java");
    return g_name;
}

lldb_private::ConstString
JavaLanguage::GetPluginName()
{
    return GetPluginNameStatic();
}

uint32_t
JavaLanguage::GetPluginVersion()
{
    return 1;
}

Language *
JavaLanguage::CreateInstance(lldb::LanguageType language)
{
    if (language == eLanguageTypeJava)
        return new JavaLanguage();
    return nullptr;
}

bool
JavaLanguage::IsNilReference(ValueObject &valobj)
{
    if (!valobj.GetCompilerType().IsReferenceType())
        return false;

    // If we failed to read the value then it is not a nil reference.
    return valobj.GetValueAsUnsigned(UINT64_MAX) == 0;
}

lldb::TypeCategoryImplSP
JavaLanguage::GetFormatters()
{
    static std::once_flag g_initialize;
    static TypeCategoryImplSP g_category;

    std::call_once(g_initialize, [this]() -> void {
        DataVisualization::Categories::GetCategory(GetPluginName(), g_category);
        if (g_category)
        {
            const char* array_regexp = "^.*\\[\\]&?$";

            lldb::TypeSummaryImplSP string_summary_sp(new CXXFunctionSummaryFormat(
                TypeSummaryImpl::Flags().SetDontShowChildren(true), lldb_private::formatters::JavaStringSummaryProvider,
                "java.lang.String summary provider"));
            g_category->GetTypeSummariesContainer()->Add(ConstString("java::lang::String"), string_summary_sp);

            lldb::TypeSummaryImplSP array_summary_sp(new CXXFunctionSummaryFormat(
                TypeSummaryImpl::Flags().SetDontShowChildren(true), lldb_private::formatters::JavaArraySummaryProvider,
                "Java array summary provider"));
            g_category->GetRegexTypeSummariesContainer()->Add(RegularExpressionSP(new RegularExpression(array_regexp)),
                                                              array_summary_sp);

#ifndef LLDB_DISABLE_PYTHON
            AddCXXSynthetic(g_category, lldb_private::formatters::JavaArraySyntheticFrontEndCreator,
                            "Java array synthetic children", ConstString(array_regexp),
                            SyntheticChildren::Flags().SetCascades(true), true);
#endif
        }
    });
    return g_category;
}
