#pragma once
#ifndef UTILITY_H
#define UTILITY_H
#include "ANSLicense.h"
#include <boost/date_time.hpp>
#include <boost/date_time/gregorian/gregorian.hpp>
#include "boost/property_tree/ptree.hpp"
#include "boost/property_tree/json_parser.hpp"
#include "boost/foreach.hpp"

#include <zlib.h>
#include <zip.h>
#include <filesystem>
#include <cstring>
#include <iostream>
#include <vector>
#include <regex>
#include <stdio.h>
#include <memory>
#include <mutex>

//namespace logging = boost::log;
//namespace attrs = boost::log::attributes;
//namespace expr = boost::log::expressions;
//namespace src = boost::log::sources;
//namespace keywords = boost::log::keywords;
//namespace sinks = boost::log::sinks;

namespace fs = std::filesystem;

#ifndef MIN
#  define MIN(a,b)  ((a) > (b) ? (b) : (a))
#endif
#ifndef MAX
#  define MAX(a,b)  ((a) < (b) ? (b) : (a))
#endif
#define DETECT_BUFFER_SIZE 0x9000


 ANSLICENSE_API std::string path_to_filename(std::string path);
 ANSLICENSE_API std::string GetMainFolderDir();
 ANSLICENSE_API std::string GetLoggerDir();
 ANSLICENSE_API std::string GetLicenseDir();
// Convert file path to only the filename
 ANSLICENSE_API std::wstring String2WString(const std::string input);
 ANSLICENSE_API std::string WString2String(const std::wstring input);
 ANSLICENSE_API std::string Dash2Underscore(std::string text);
 ANSLICENSE_API std::string Underscore2Dash(std::string text);
 ANSLICENSE_API std::string Space2Underscore(std::string text);

 [[nodiscard]] ANSLICENSE_API bool FileExist(const std::string& filePath);
 [[nodiscard]] ANSLICENSE_API bool FolderExist(const std::string& folderPath);
 [[nodiscard]] ANSLICENSE_API bool CreateDirectory(const std::string& folderPath);

 [[nodiscard]] ANSLICENSE_API bool RenameFile(const std::string& oldFilePath, const std::string& newFilePath);
 [[nodiscard]] ANSLICENSE_API bool CopyFile(const std::string& sourceFilePath, const std::string& destinationFilePath);
 ANSLICENSE_API void CopyFiles(const std::string& sourceFolder, const std::string& destinationFolder);
 [[nodiscard]] ANSLICENSE_API bool DeleteFile(const std::string& filePath);
 [[nodiscard]] ANSLICENSE_API bool DeleteLicenseFile(const std::string& filePath);
 [[nodiscard]] ANSLICENSE_API std::vector<std::string> ListFilesInFolder(const std::string& folderPath);
 ANSLICENSE_API void DeleteFilesInFolderExcept(const std::string& folderPath, const std::vector<std::string>& filesToKeep);
 [[nodiscard]] ANSLICENSE_API bool DeleteFolder(const std::string& folderPath);
 ANSLICENSE_API void ToLowerCase(std::string& str);
 ANSLICENSE_API std::string toLower(const std::string& str);
 ANSLICENSE_API std::string GetFileExtension(const std::string& filePath);
 ANSLICENSE_API std::string GetFileNameWithoutExtension(const std::string& filePath);
 ANSLICENSE_API std::string FindFilePathInFileList(const std::vector<std::string>& fileList, const std::string& fileName);
 ANSLICENSE_API std::string ReadFileContent(std::string filePath);
 ANSLICENSE_API std::string ReadFileAsBinary(const std::string& filename);
 ANSLICENSE_API int  ReadAllBytes(std::string filePath, std::vector<char>& allDataBytes);
 ANSLICENSE_API std::string ExtractFolderName(const std::string& filePath); // Function to extract the folder name from a file path or file name
 ANSLICENSE_API std::string GetParentFolder(const std::string& directoryPath);// Function to extract the folder name from a file path or file name
 ANSLICENSE_API std::string CreateFilePath(const std::string& folderName, const std::string& fileName);// Function to create a file path from a folder name and a file name
 ANSLICENSE_API std::filesystem::path GetSafeTempDirectory();
 ANSLICENSE_API std::string GenerateOutputFolder(std::string modelFilePath, std::string modelName, bool edgeDeviceModel=true);
 ANSLICENSE_API bool ExtractPasswordProtectedZip(const std::string& zipFileName, const std::string& password, const std::string& modelName, std::string& outputFolder, bool edgeDeviceModel = true);
 ANSLICENSE_API bool AddFileToZip(zip* archive, const char* filePath, const char* zipPath, const char* password);
 ANSLICENSE_API bool AddFolderContentsToZip(zip* archive, const char* folderPath, const char* zipPath, const char* password);
 ANSLICENSE_API bool ZipFolderWithPassword(const char* folderPath, const char* zipFilePath, const char* password);
 ANSLICENSE_API std::string VectorToCommaSeparatedString(const std::vector<std::string>& inputVector);
 ANSLICENSE_API std::string VectorToSeparatedString(const std::vector<std::string>& inputVector);
 ANSLICENSE_API std::vector<std::string> Split(const std::string str, const std::string regex_str);
 ANSLICENSE_API bool ReadLicenseKeyFile(std::string licenseKeyFilePath, std::string& licenseKey, std::string& activationKey, std::string& validationData);
 ANSLICENSE_API std::vector<std::string> GetTrialLicenseKeyFiles(std::string registrationName);
 ANSLICENSE_API std::string GetTrialLicenseKey(std::string registrationName);
 ANSLICENSE_API bool UpdateTrialLicenseKey(std::string trialLicenseKey, std::string registrationName);
 ANSLICENSE_API int  GetExpirationDate(std::string licenseData, int& productId);
 ANSLICENSE_API bool RemoveTrialLicenseKey(std::string registrationName);
 ANSLICENSE_API std::string GetStringCurrentDateTime(); // Return current datetime in string format
 ANSLICENSE_API std::string GetDateTimeString(const std::string& format);
 // For training engine
 //bool ExtractPasswordProtectedZipForTrainingEgnine(const std::string& zipFileName, const std::string& password, const std::string& modelName, std::string& outputFolder, bool edgeDeviceModel = true);
 ANSLICENSE_API bool ExtractProtectedZipFile(const std::string& zipFileName,const std::string& password,const std::string& modelName,const std::string outputFolder);

 // Per-path mutex for a model folder. Used to serialize extract ↔ session
 // creation on the same extracted folder so concurrent CreateANSODHandle calls
 // cannot truncate/rewrite a model file while another thread is loading it.
 // Keyed by folder path (not zip path) so both extractor and consumer agree.
 // Returns std::timed_mutex so callers can bound their wait and avoid a hang
 // if a peer thread deadlocks inside extraction or ORT session creation.
 ANSLICENSE_API std::shared_ptr<std::timed_mutex> GetModelFolderLock(const std::string& folderPath);

// ============================================================================
// ModelFolderLockGuard
//
// RAII guard that serializes "open files in an extracted model folder" against
// re-entries into ExtractProtectedZipFile on the SAME folder. Without this,
// two threads creating handles for the same model zip can race so that thread
// A opens a model file (via ORT / TRT / OpenVINO) while thread B truncates it
// via std::ofstream inside the extractor — Windows surfaces this as "system
// error number 13" (EACCES) on the reader.
//
// Backed by GetModelFolderLock() above which returns a process-wide
// std::timed_mutex keyed on the folder path. The extractor takes the same
// lock, so extract ↔ open is mutually exclusive.
//
// Acquisition is bounded by `timeout` (default 120 s) so a deadlocked peer
// cannot hang the caller thread forever. On timeout, .acquired() is false and
// the caller must fail the load.
//
// Lives in Utility.h (rather than a per-module header) so every ANSCORE
// module — ANSODEngine, ANSOCR, ANSLPR, ANSFR, etc. — can use it without
// pulling in ANSODEngine headers.
//
// Usage:
//
//     bool MyEngine::LoadModelFromFolder(...) {
//         bool result = MyBase::LoadModelFromFolder(...);
//         if (!result) return false;
//         // ── serialize derived-class init against concurrent extracts ──
//         ANSCENTER::ModelFolderLockGuard _flg(_modelFolder,
//                                              "MyEngine::LoadModelFromFolder");
//         if (!_flg.acquired()) {
//             _logger.LogError("MyEngine::LoadModelFromFolder",
//                 "Timed out waiting for model-folder lock: " + _modelFolder,
//                 __FILE__, __LINE__);
//             return false;
//         }
//         // ... existing body: Init(...) / buildLoadNetwork(...) / etc. ...
//     }
//
// Notes:
//   • Placement — insert AFTER the base's XXX() returns (extractor already
//     released its own lock by then) and BEFORE any file open in _modelFolder.
//     Wrapping the base call would deadlock — it takes the same lock itself.
//   • RAII — destructor auto-releases on every return path within the scope.
//   • Timing — entry/acquire/timeout are traced via ANS_DBG("EngineLoad"),
//     filter on [EngineLoad] in DebugView to diagnose stalls.
// ============================================================================
namespace ANSCENTER {
    class ModelFolderLockGuard {
    public:
        explicit ModelFolderLockGuard(const std::string& folderPath,
                                      const char* caller,
                                      std::chrono::seconds timeout = std::chrono::seconds(120))
            : _caller(caller ? caller : "(?)"), _folder(folderPath)
        {
            if (folderPath.empty()) {
                // Nothing to serialize — no extracted folder yet. Treat as
                // acquired so caller's existing init runs unchanged (e.g.
                // custom-path engines that never go through the zip extractor).
                _ok = true;
                ANS_DBG("EngineLoad", "%s: empty folder path, skipping lock",
                        _caller);
                return;
            }
            auto lock = GetModelFolderLock(folderPath);
            _guard = std::unique_lock<std::timed_mutex>(*lock, std::defer_lock);
            ANS_DBG("EngineLoad",
                    "%s: waiting on folder lock (%llds): %s",
                    _caller, (long long)timeout.count(), folderPath.c_str());
            const auto t0 = std::chrono::steady_clock::now();
            if (_guard.try_lock_for(timeout)) {
                const auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
                    std::chrono::steady_clock::now() - t0).count();
                _ok = true;
                ANS_DBG("EngineLoad", "%s: folder lock acquired in %lldms",
                        _caller, (long long)ms);
            } else {
                const auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
                    std::chrono::steady_clock::now() - t0).count();
                _ok = false;
                ANS_DBG("EngineLoad",
                        "%s: TIMEOUT on folder lock after %lldms: %s",
                        _caller, (long long)ms, folderPath.c_str());
            }
        }

        // Non-copyable, non-movable: lock lifetime is tied to this scope.
        ModelFolderLockGuard(const ModelFolderLockGuard&)            = delete;
        ModelFolderLockGuard& operator=(const ModelFolderLockGuard&) = delete;

        bool acquired() const noexcept { return _ok; }
        explicit operator bool() const noexcept { return _ok; }

    private:
        const char*  _caller;
        std::string  _folder;
        std::unique_lock<std::timed_mutex> _guard;
        bool         _ok = false;
    };
}  // namespace ANSCENTER

#endif