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#pragma once

#include <filepathcachinginterface.h>
#include <sourcelocationscontainer.h>
#include <sourcerangescontainer.h>

#include <clang/Basic/SourceManager.h>
#include <clang/Lex/Lexer.h>
#include <llvm/Support/FileSystem.h>
#include <llvm/Support/FileUtilities.h>

#include <iterator>
#include <cctype>

namespace ClangBackEnd {

inline
llvm::SmallString<256> absolutePath(clang::StringRef path)
{
    llvm::SmallString<256> absolutePath;

    if (llvm::sys::path::is_absolute(path)) {
        absolutePath = path;

        llvm::sys::path::remove_dots(absolutePath, true);

        return absolutePath;
    }

    std::error_code errorCode = llvm::sys::fs::real_path(path, absolutePath, true);

    if (!errorCode)
        llvm::sys::fs::make_absolute(absolutePath);

    return absolutePath;
}

inline
Utils::PathString fromNativePath(const llvm::SmallString<256> &string)
{
    Utils::PathString path(string.data(), string.size());

    if (Utils::HostOsInfo::isWindowsHost())
        std::replace(path.begin(), path.end(), '\\', '/');

    return path;
}

inline
void appendSourceLocationsToSourceLocationsContainer(
        ClangBackEnd::SourceLocationsContainer &sourceLocationsContainer,
        const std::vector<clang::SourceLocation> &sourceLocations,
        const clang::SourceManager &sourceManager,
        FilePathCachingInterface &filePathCache)
{
    sourceLocationsContainer.reserve(sourceLocations.size());

    for (const auto &sourceLocation : sourceLocations) {
        clang::FullSourceLoc fullSourceLocation(sourceLocation, sourceManager);
        const auto decomposedLoction = fullSourceLocation.getDecomposedLoc();
        const auto fileId = decomposedLoction.first;
        const auto offset = decomposedLoction.second;
        const auto fileEntry = sourceManager.getFileEntryForID(fileId);
        auto filePath = FilePath::fromNativeFilePath(absolutePath(fileEntry->getName()));

        sourceLocationsContainer.insertSourceLocation(filePathCache.filePathId(filePath),
                                                      fullSourceLocation.getSpellingLineNumber(),
                                                      fullSourceLocation.getSpellingColumnNumber(),
                                                      offset);
    }
}



} // namespace ClangBackEnd