#include "il2cpp-config.h"
#include "MetadataLoader.h"
#include "os/File.h"
#include "os/Mutex.h"
#include "utils/MemoryMappedFile.h"
#include "utils/PathUtils.h"
#include "utils/Runtime.h"
#include "utils/Logging.h"


#if IL2CPP_TARGET_ANDROID && IL2CPP_TINY_DEBUGGER && !IL2CPP_TINY_FROM_IL2CPP_BUILDER
#include <stdlib.h>
extern "C"
{
    void* loadAsset(const char* path, int *size, void* (*alloc)(size_t));
}
#elif IL2CPP_TARGET_JAVASCRIPT && IL2CPP_TINY_DEBUGGER && !IL2CPP_TINY_FROM_IL2CPP_BUILDER
extern void* g_MetadataForWebTinyDebugger;
#endif

void* il2cpp::vm::MetadataLoader::LoadMetadataFile(const char* fileName)
{
#if IL2CPP_TARGET_ANDROID && IL2CPP_TINY_DEBUGGER && !IL2CPP_TINY_FROM_IL2CPP_BUILDER
    std::string resourcesDirectory = utils::PathUtils::Combine(utils::StringView<char>("Data"), utils::StringView<char>("Metadata"));

    std::string resourceFilePath = utils::PathUtils::Combine(resourcesDirectory, utils::StringView<char>(fileName, strlen(fileName)));

    int size = 0;
    return loadAsset(resourceFilePath.c_str(), &size, malloc);
#elif IL2CPP_TARGET_JAVASCRIPT && IL2CPP_TINY_DEBUGGER && !IL2CPP_TINY_FROM_IL2CPP_BUILDER
    return g_MetadataForWebTinyDebugger;
#else
    std::string resourcesDirectory = utils::PathUtils::Combine(utils::Runtime::GetDataDir(), utils::StringView<char>("Metadata"));

    std::string resourceFilePath = utils::PathUtils::Combine(resourcesDirectory, utils::StringView<char>(fileName, strlen(fileName)));

    int error = 0;
    os::FileHandle* handle = os::File::Open(resourceFilePath, kFileModeOpen, kFileAccessRead, kFileShareRead, kFileOptionsNone, &error);
    if (error != 0)
    {
        utils::Logging::Write("ERROR: Could not open %s", resourceFilePath.c_str());
        return NULL;
    }

    void* fileBuffer = utils::MemoryMappedFile::Map(handle);

    os::File::Close(handle, &error);
    if (error != 0)
    {
        utils::MemoryMappedFile::Unmap(fileBuffer);
        fileBuffer = NULL;
        return NULL;
    }

    return fileBuffer;
#endif
}

void il2cpp::vm::MetadataLoader::UnloadMetadataFile(void* fileBuffer)
{
#if IL2CPP_TARGET_ANDROID && IL2CPP_TINY_DEBUGGER && !IL2CPP_DEBUGGER_TESTS
    free(fileBuffer);
#else
    bool success = il2cpp::utils::MemoryMappedFile::Unmap(fileBuffer);
    NO_UNUSED_WARNING(success);
    IL2CPP_ASSERT(success);
#endif
}