/*
 * Copyright (c) Contributors to the Open 3D Engine Project. For complete copyright and license terms please see the LICENSE at the root of this distribution.
 *
 * SPDX-License-Identifier: Apache-2.0 OR MIT
 *
 */

#include <ProjectUtils.h>
#include <ProjectManagerDefs.h>
#include <QProcessEnvironment>
#include <QDir>

#include <AzCore/Settings/SettingsRegistryImpl.h>
#include <AzCore/Settings/SettingsRegistryMergeUtils.h>
#include <AzCore/Utils/Utils.h>

namespace O3DE::ProjectManager
{
    namespace ProjectUtils
    {
        // The list of clang C/C++ compiler command lines to validate on the host Linux system
        const QStringList SupportedClangVersions = {"13", "12", "11", "10", "9", "8", "7", "6.0"};

        AZ::Outcome<void, QString> SetupCommandLineProcessEnvironment()
        {
            return AZ::Success();
        }

        AZ::Outcome<QString, QString> FindSupportedCompilerForPlatform()
        {
            // Validate that cmake is installed and is in the command line
            auto whichCMakeResult = ProjectUtils::ExecuteCommandResult("which", QStringList{ProjectCMakeCommand});
            if (!whichCMakeResult.IsSuccess())
            {
                return AZ::Failure(QObject::tr("CMake not found. <br><br>"
                    "Make sure that the minimum version of CMake is installed and available from the command prompt. "
                    "Refer to the <a href='https://o3de.org/docs/welcome-guide/setup/requirements/#cmake'>O3DE requirements</a> page for more information."));
            }

            // Look for the first compatible version of clang. The list below will contain the known clang compilers that have been tested for O3DE.
            for (const QString& supportClangVersion : SupportedClangVersions)
            {
                auto whichClangResult = ProjectUtils::ExecuteCommandResult("which", QStringList{QString("clang-%1").arg(supportClangVersion)});
                auto whichClangPPResult = ProjectUtils::ExecuteCommandResult("which", QStringList{QString("clang++-%1").arg(supportClangVersion)});
                if (whichClangResult.IsSuccess() && whichClangPPResult.IsSuccess())
                {
                    return AZ::Success(QString("clang-%1").arg(supportClangVersion));
                }
            }
            return AZ::Failure(QObject::tr("Clang not found. <br><br>"
                "Make sure that the clang is installed and available from the command prompt. "
                "Refer to the <a href='https://o3de.org/docs/welcome-guide/setup/requirements/#cmake'>O3DE requirements</a> page for more information."));
        }


        AZ::Outcome<void, QString> OpenCMakeGUI(const QString& projectPath)
        {
            AZ::Outcome processEnvResult = SetupCommandLineProcessEnvironment();
            if (!processEnvResult.IsSuccess())
            {
                return AZ::Failure(processEnvResult.GetError());
            }

            QString projectBuildPath = QDir(projectPath).filePath(ProjectBuildPathPostfix);
            AZ::Outcome projectBuildPathResult = GetProjectBuildPath(projectPath);
            if (projectBuildPathResult.IsSuccess())
            {
                projectBuildPath = projectBuildPathResult.GetValue();
            }

            QProcess process;

            // if the project build path is relative, it should be relative to the project path
            process.setWorkingDirectory(projectPath);

            process.setProgram("cmake-gui");
            process.setArguments({ "-S", projectPath, "-B", projectBuildPath });
            if(!process.startDetached())
            {
                return AZ::Failure(QObject::tr("Failed to start CMake GUI"));
            }

            return AZ::Success();
        }

        AZ::Outcome<QString, QString> RunGetPythonScript(const QString& engineRoot)
        {
            return ExecuteCommandResultModalDialog(
                QString("%1/python/get_python.sh").arg(engineRoot),
                {},
                QObject::tr("Running get_python script..."));
        }

        AZ::IO::FixedMaxPath GetEditorExecutablePath(const AZ::IO::PathView& projectPath)
        {
            AZ::IO::FixedMaxPath editorPath;
            AZ::IO::FixedMaxPath fixedProjectPath{ projectPath };
            // First attempt to launch the Editor.exe within the project build directory if it exists
            AZ::IO::FixedMaxPath buildPathSetregPath = fixedProjectPath
                / AZ::SettingsRegistryInterface::DevUserRegistryFolder
                / "Platform" / AZ_TRAIT_OS_PLATFORM_CODENAME / "build_path.setreg";
            if (AZ::IO::SystemFile::Exists(buildPathSetregPath.c_str()))
            {
                AZ::SettingsRegistryImpl settingsRegistry;
                // Merge the build_path.setreg into the local SettingsRegistry instance
                if (AZ::IO::FixedMaxPath projectBuildPath;
                    settingsRegistry.MergeSettingsFile(buildPathSetregPath.Native(),
                        AZ::SettingsRegistryInterface::Format::JsonMergePatch)
                    && settingsRegistry.Get(projectBuildPath.Native(), AZ::SettingsRegistryMergeUtils::ProjectBuildPath))
                {
                    // local Settings Registry will be used to merge the build_path.setreg for the supplied projectPath
                    AZ::IO::FixedMaxPath buildConfigurationPath = (fixedProjectPath / projectBuildPath).LexicallyNormal();

                    // First try <project-build-path>/bin/$<CONFIG> and if that path doesn't exist
                    // try <project-build-path>/bin/$<PLATFORM>/$<CONFIG>
                    buildConfigurationPath /= "bin";
                    if (editorPath = (buildConfigurationPath / AZ_BUILD_CONFIGURATION_TYPE / "Editor").
                        ReplaceExtension(AZ_TRAIT_OS_EXECUTABLE_EXTENSION);
                        AZ::IO::SystemFile::Exists(editorPath.c_str()))
                    {
                        return editorPath;
                    }
                    else if (editorPath = (buildConfigurationPath / AZ_TRAIT_OS_PLATFORM_CODENAME
                    / AZ_BUILD_CONFIGURATION_TYPE / "Editor").
                        ReplaceExtension(AZ_TRAIT_OS_EXECUTABLE_EXTENSION);
                        AZ::IO::SystemFile::Exists(editorPath.c_str()))
                    {
                        return editorPath;
                    }
                }
            }

            // Fall back to checking if an Editor exists in O3DE executable directory
            editorPath = AZ::IO::FixedMaxPath(AZ::Utils::GetExecutableDirectory()) / "Editor";
            editorPath.ReplaceExtension(AZ_TRAIT_OS_EXECUTABLE_EXTENSION);
            if (AZ::IO::SystemFile::Exists(editorPath.c_str()))
            {
                return editorPath;
            }
            return {};
        }

        AZ::Outcome<QString, QString> CreateDesktopShortcut([[maybe_unused]] const QString& filename, [[maybe_unused]] const QString& targetPath, [[maybe_unused]] const QStringList& arguments)
        {
            return AZ::Failure(QObject::tr("Creating desktop shortcuts functionality not implemented for this platform yet."));
        }
    } // namespace ProjectUtils
} // namespace O3DE::ProjectManager