/********************************************************************************
 * Copyright (c) 2025-2026 ZF Friedrichshafen AG
 *
 * This program and the accompanying materials are made available under the
 * terms of the Apache License Version 2.0 which is available at
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Contributors:
 *   Thomas Pfleiderer - initial API and implementation
 ********************************************************************************/

#ifndef VSS_VD_GENERATOR_H
#define VSS_VD_GENERATOR_H

#include <fstream>
#include "codegen_base.h"
#include "vss_helper.h"

/**
 * @brief Basic Service generator.
 */
class CVSSVDGenerator : public CCodeGeneratorBase, CVSSHelper
{
public:
    /**
     * @brief Constructor
     * @param[in] signals Reference to a vector containing all signals
     * @param[in] rpathOutputDir Reference to the outpur directory.
     * @param[in] rsPrefix used by cmake library and signal definition in signal_identifier.h file
     * @param[in] rsVersion optional version tag, will be wriiten in header of the files 
     * @param[in] enableComponentCreation optional version tag, will be wriiten in header of the files 
     */
    CVSSVDGenerator(const std::vector<SSignalVDDefinition>& signals, const std::filesystem::path& rpathOutputDir, const std::string& rsPrefix, const std::string& rsVersion, const bool enableComponentCreation) :
        m_enableComponentCreation(enableComponentCreation),
        m_ssPrefix(rsPrefix),
        m_ssVersion(rsVersion), 
        m_pathProject(rpathOutputDir), 
        m_signals(signals)
    {}

    /**
     * @brief Auto generate the Files
     * @return true on success, otherwise false
     */
    bool GeneratedCode();

private:

    /**
     * @brief create content of the summary tect file
     * @return string containing the complete content of the summary text file;
     */
    std::string SummaryTextFile() const;

    /**
     * @brief create a file name including prefix and extension
     * @param[in] prefix
     * @param[in] filename
     * @param[in] extension
     * @return combined file name
     */
    std::string AppendExtension(const std::string& prefix, const std::string& filename, const std::string& extension) const;

    /**
     * @brief create vehicle device and basic service .h an .cpp files
     *        create IDL files
     * @param[in] ssVersion optional information will be placed in the header of the files
     */
    void CreateFiles(const std::string& ssVersion);

    /**
     * @brief create IDL files and vehicle device and basic service files of RX signals
     * @param[in] ssVersion optional information will be placed in the header of the files 
     */
    void CreateRXFiles(const std::string& ssVersion);

    /**
     * @brief create vehicle device files of a single RX signal
     * @param[in] signal single signal definition
     * @param[in] ssVersion optional information will be placed in the header of the files 
     */
    void CreateVehicleDeviceFilesForRXSignal(const SSignalVDDefinition& signal, const std::string& ssVersion);

    /**
     * @brief create IDL file of a single RX signal (vehicle device)
     * @param[in] signal single signal definition
     * @param[in] ssVersion optional information will be placed in the header of the files 
     */
    void CreateIDLVehicleDeviceFileForRXSignal(const SSignalVDDefinition& signal, const std::string& ssVersion) const;

    /**
     * @brief create IDL files and vehicle device and basic service files of TX signals
     * @param[in] ssVersion optional information will be placed in the header of the files 
     */
    void CreateTXFiles(const std::string& ssVersion) const;

    /**
     * @brief create vehicle device files of a single TX signal
     * @param[in] signal single signal definition
     * @param[in] ssVersion optional information will be placed in the header of the files 
     */
    void CreateVehicleDeviceFilesForTXSignal(const SSignalVDDefinition& signal, const std::string& ssVersion) const;

    /**
     * @brief create IDL file for a single TX signal (vehicle device)
     * @param[in] signal single signal definition
     * @param[in] ssVersion optional information will be placed in the header of the files 
     */
    void CreateIDLVehicleDeviceFileForTXSignal(const SSignalVDDefinition& signal, const std::string& ssVersion) const;

    /**
     * @brief In case a RX signal and TX signal have the same vss name we need to update the existing rx signal files
     * @param[in] rootPath complete root path
     * @param[in] subfolder subfolder of the rx signal files
     * @return true if files could be updated successfully, otherwise false
     */
    bool UpdateExistingFiles(const std::filesystem::path& rootPath, const std::string& subfolder, const SSignalVDDefinition& signal) const;   

    /**
     * @brief Update existing cpp file of a rx signal
     * @param[in] rootPath complete root path
     * @param[in] signal single signal definition
     * @param[in] initializeList list of interfaces for the initialization method
     * @param[in] implementation function implementation methods
     * @return true if file could be updated successfully, otherwise false
     */

    bool UpdateCppFile(const std::filesystem::path& rootFolder, const SSignalVDDefinition& signal, const std::string& initializeList, const std::string& implementation) const;

    /**
     * @brief Update existing cpp file of a rx signal
     * @param[in] rootPath complete root path
     * @param[in] signal single signal definition
     * @param[in] includeList list of headers to be included
     * @param[in] interfaceList list if interfaces
     * @param[in] interfaceEntryList list of event entry interfaces
     * @param[in] functionList list of function definitions
     * @param[in] variablePointerList list of interface pointers
     * @return true if file could be updated successfully, otherwise false
     */

    bool UpdateHeaderFile(const std::filesystem::path& rootFolder, const SSignalVDDefinition& signal, const std::string& includeList, 
    const std::string& interfaceList, const std::string& interfaceEntryList, const std::string& functionList, const std::string& variablePointerList) const;

    bool m_enableComponentCreation;                    ///< if set, the code for the components are created, otherwise only idl files 
    std::string m_ssPrefix;                            ///< prefix, used by cmake library and signal definition in signal_identifier.h file.
    std::string m_ssVersion;                           ///< optional version tag, will be written in header of the files 
    std::filesystem::path  m_pathProject;              ///< Project file path
    std::vector <SSignalVDDefinition> m_signals;       ///< all signals
    std::vector <SSignalVDDefinition> m_TXsignals;     ///< vector containing the RX signals
    std::vector <SSignalVDDefinition> m_RXsignals;     ///< vector containing the TX signals
    std::vector<std::filesystem::path> m_createdFiles; ///< collect all files created when the RX signals are processed    
};

#endif // !defined VSS_VD_GENERATOR_H