/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#include "../../Application/jucer_Headers.h"
#include "../../ProjectSaving/jucer_ProjectSaver.h"
#include "../../ProjectSaving/jucer_ProjectExport_Xcode.h"
#include "../../Application/jucer_Application.h"

//==============================================================================
LibraryModule::LibraryModule (const ModuleDescription& d)
    : moduleInfo (d)
{
}

void LibraryModule::writeIncludes (ProjectSaver& projectSaver, OutputStream& out)
{
    auto& project = projectSaver.getProject();
    auto& modules = project.getEnabledModules();

    auto moduleID = getID();

    if (modules.shouldCopyModuleFilesLocally (moduleID))
    {
        auto juceModuleFolder = moduleInfo.getFolder();

        auto localModuleFolder = project.getLocalModuleFolder (moduleID);
        localModuleFolder.createDirectory();
        projectSaver.copyFolder (juceModuleFolder, localModuleFolder);
    }

    out << "#include <" << moduleInfo.getModuleFolder().getFileName() << "/"
        << moduleInfo.getHeader().getFileName()
        << ">" << newLine;
}

void LibraryModule::addSearchPathsToExporter (ProjectExporter& exporter) const
{
    auto moduleRelativePath = exporter.getModuleFolderRelativeToProject (getID());

    exporter.addToExtraSearchPaths (moduleRelativePath.getParentDirectory());

    String libDirPlatform;

    if (exporter.isLinux())
        libDirPlatform = "Linux";
    else if (exporter.isCodeBlocks() && exporter.isWindows())
        libDirPlatform = "MinGW";
    else
        libDirPlatform = exporter.getTargetFolder().getFileName();

    auto libSubdirPath = moduleRelativePath.toUnixStyle() + "/libs/" + libDirPlatform;
    auto moduleLibDir = File (exporter.getProject().getProjectFolder().getFullPathName() + "/" + libSubdirPath);

    if (moduleLibDir.exists())
        exporter.addToModuleLibPaths ({ libSubdirPath, moduleRelativePath.getRoot() });

    auto extraInternalSearchPaths = moduleInfo.getExtraSearchPaths().trim();

    if (extraInternalSearchPaths.isNotEmpty())
    {
        auto paths = StringArray::fromTokens (extraInternalSearchPaths, true);

        for (auto& path : paths)
            exporter.addToExtraSearchPaths (moduleRelativePath.getChildFile (path.unquoted()));
    }
}

void LibraryModule::addDefinesToExporter (ProjectExporter& exporter) const
{
    auto extraDefs = moduleInfo.getPreprocessorDefs().trim();

    if (extraDefs.isNotEmpty())
        exporter.getExporterPreprocessorDefsValue() = exporter.getExporterPreprocessorDefsString() + "\n" + extraDefs;
}

void LibraryModule::addCompileUnitsToExporter (ProjectExporter& exporter, ProjectSaver& projectSaver) const
{
    auto& project = exporter.getProject();
    auto& modules = project.getEnabledModules();

    auto moduleID = getID();

    auto localModuleFolder = modules.shouldCopyModuleFilesLocally (moduleID) ? project.getLocalModuleFolder (moduleID)
                                                                             : moduleInfo.getFolder();

    Array<File> compiled;
    findAndAddCompiledUnits (exporter, &projectSaver, compiled);

    if (modules.shouldShowAllModuleFilesInProject (moduleID))
        addBrowseableCode (exporter, compiled, localModuleFolder);
}

void LibraryModule::addLibsToExporter (ProjectExporter& exporter) const
{
    auto parseAndAddLibsToList = [] (StringArray& libList, const String& libs)
    {
        libList.addTokens (libs, ", ", {});
        libList.trim();
        libList.removeDuplicates (false);
    };

    auto& project = exporter.getProject();

    if (exporter.isXcode())
    {
        auto& xcodeExporter = dynamic_cast<XcodeProjectExporter&> (exporter);

        if (project.isAUPluginHost())
        {
            xcodeExporter.xcodeFrameworks.add ("CoreAudioKit");

            if (xcodeExporter.isOSX())
                xcodeExporter.xcodeFrameworks.add ("AudioUnit");
        }

        auto frameworks = moduleInfo.getModuleInfo() [xcodeExporter.isOSX() ? "OSXFrameworks" : "iOSFrameworks"].toString();
        xcodeExporter.xcodeFrameworks.addTokens (frameworks, ", ", {});

        parseAndAddLibsToList (xcodeExporter.xcodeLibs, moduleInfo.getModuleInfo() [exporter.isOSX() ? "OSXLibs" : "iOSLibs"].toString());
    }
    else if (exporter.isLinux())
    {
        parseAndAddLibsToList (exporter.linuxLibs, moduleInfo.getModuleInfo() ["linuxLibs"].toString());
        parseAndAddLibsToList (exporter.linuxPackages, moduleInfo.getModuleInfo() ["linuxPackages"].toString());
    }
    else if (exporter.isWindows())
    {
        if (exporter.isCodeBlocks())
            parseAndAddLibsToList (exporter.mingwLibs, moduleInfo.getModuleInfo() ["mingwLibs"].toString());
        else
            parseAndAddLibsToList (exporter.windowsLibs, moduleInfo.getModuleInfo() ["windowsLibs"].toString());
    }
    else if (exporter.isAndroid())
    {
        parseAndAddLibsToList (exporter.androidLibs, moduleInfo.getModuleInfo() ["androidLibs"].toString());
    }
}

void LibraryModule::addSettingsForModuleToExporter (ProjectExporter& exporter, ProjectSaver& projectSaver) const
{
    addSearchPathsToExporter (exporter);
    addDefinesToExporter (exporter);
    addCompileUnitsToExporter (exporter, projectSaver);
    addLibsToExporter (exporter);
}

void LibraryModule::getConfigFlags (Project& project, OwnedArray<Project::ConfigFlag>& flags) const
{
    auto header = moduleInfo.getHeader();
    jassert (header.exists());

    StringArray lines;
    header.readLines (lines);

    for (int i = 0; i < lines.size(); ++i)
    {
        auto line = lines[i].trim();

        if (line.startsWith ("/**") && line.containsIgnoreCase ("Config:"))
        {
            auto config = std::make_unique<Project::ConfigFlag>();
            config->sourceModuleID = getID();
            config->symbol = line.fromFirstOccurrenceOf (":", false, false).trim();

            if (config->symbol.length() > 2)
            {
                ++i;

                while (! (lines[i].contains ("*/") || lines[i].contains ("@see")))
                {
                    if (lines[i].trim().isNotEmpty())
                        config->description = config->description.trim() + " " + lines[i].trim();

                    ++i;
                }

                config->description = config->description.upToFirstOccurrenceOf ("*/", false, false);
                config->value = project.getConfigFlag (config->symbol);

                i += 2;

                if (lines[i].contains ("#define " + config->symbol))
                {
                    auto value = lines[i].fromFirstOccurrenceOf ("#define " + config->symbol, false, true).trim();
                    config->value.setDefault (value == "0" ? false : true);
                }

                auto currentValue = config->value.get().toString();

                if      (currentValue == "enabled")     config->value = true;
                else if (currentValue == "disabled")    config->value = false;

                flags.add (std::move (config));
            }
        }
    }
}

static void addFileWithGroups (Project::Item& group, const build_tools::RelativePath& file, const String& path)
{
    auto slash = path.indexOfChar (File::getSeparatorChar());

    if (slash >= 0)
    {
        auto topLevelGroup = path.substring (0, slash);
        auto remainingPath = path.substring (slash + 1);

        auto newGroup = group.getOrCreateSubGroup (topLevelGroup);
        addFileWithGroups (newGroup, file, remainingPath);
    }
    else
    {
        if (! group.containsChildForFile (file))
            group.addRelativeFile (file, -1, false);
    }
}

struct FileSorter
{
    static int compareElements (const File& f1, const File& f2)
    {
        return f1.getFileName().compareNatural (f2.getFileName());
    }
};

void LibraryModule::findBrowseableFiles (const File& folder, Array<File>& filesFound) const
{
    Array<File> tempList;
    FileSorter sorter;

    for (const auto& iter : RangedDirectoryIterator (folder, true, "*", File::findFiles))
        if (! iter.isHidden() && iter.getFile().hasFileExtension (browseableFileExtensions))
            tempList.addSorted (sorter, iter.getFile());

    filesFound.addArray (tempList);
}

bool LibraryModule::CompileUnit::isNeededForExporter (ProjectExporter& exporter) const
{
    if ((hasSuffix (file, "_OSX")        && ! exporter.isOSX())
     || (hasSuffix (file, "_iOS")        && ! exporter.isiOS())
     || (hasSuffix (file, "_Windows")    && ! exporter.isWindows())
     || (hasSuffix (file, "_Linux")      && ! exporter.isLinux())
     || (hasSuffix (file, "_Android")    && ! exporter.isAndroid()))
        return false;

    auto targetType = Project::getTargetTypeFromFilePath (file, false);

    if (targetType != build_tools::ProjectType::Target::unspecified && ! exporter.shouldBuildTargetType (targetType))
        return false;

    return exporter.usesMMFiles() ? isCompiledForObjC
                                  : isCompiledForNonObjC;
}

String LibraryModule::CompileUnit::getFilenameForProxyFile() const
{
    return "include_" + file.getFileName();
}

bool LibraryModule::CompileUnit::hasSuffix (const File& f, const char* suffix)
{
    auto fileWithoutSuffix = f.getFileNameWithoutExtension() + ".";

    return fileWithoutSuffix.containsIgnoreCase (suffix + String ("."))
             || fileWithoutSuffix.containsIgnoreCase (suffix + String ("_"));
}

Array<LibraryModule::CompileUnit> LibraryModule::getAllCompileUnits (build_tools::ProjectType::Target::Type forTarget) const
{
    auto files = getFolder().findChildFiles (File::findFiles, false);

    FileSorter sorter;
    files.sort (sorter);

    Array<LibraryModule::CompileUnit> units;

    for (auto& file : files)
    {
        if (file.getFileName().startsWithIgnoreCase (getID())
              && file.hasFileExtension (sourceFileExtensions))
        {
            if (forTarget == build_tools::ProjectType::Target::unspecified
             || forTarget == Project::getTargetTypeFromFilePath (file, true))
            {
                CompileUnit cu;
                cu.file = file;
                units.add (std::move (cu));
            }
        }
    }

    for (auto& cu : units)
    {
        cu.isCompiledForObjC = true;
        cu.isCompiledForNonObjC = ! cu.file.hasFileExtension ("mm;m");

        if (cu.isCompiledForNonObjC)
            if (cu.file.withFileExtension ("mm").existsAsFile())
                cu.isCompiledForObjC = false;

        jassert (cu.isCompiledForObjC || cu.isCompiledForNonObjC);
    }

    return units;
}

void LibraryModule::findAndAddCompiledUnits (ProjectExporter& exporter,
                                             ProjectSaver* projectSaver,
                                             Array<File>& result,
                                             build_tools::ProjectType::Target::Type forTarget) const
{
    for (auto& cu : getAllCompileUnits (forTarget))
    {
        if (cu.isNeededForExporter (exporter))
        {
            auto localFile = exporter.getProject().getGeneratedCodeFolder()
                                                  .getChildFile (cu.getFilenameForProxyFile());
            result.add (localFile);

            if (projectSaver != nullptr)
                projectSaver->addFileToGeneratedGroup (localFile);
        }
    }
}

void LibraryModule::addBrowseableCode (ProjectExporter& exporter, const Array<File>& compiled, const File& localModuleFolder) const
{
    if (sourceFiles.isEmpty())
        findBrowseableFiles (localModuleFolder, sourceFiles);

    auto sourceGroup       = Project::Item::createGroup (exporter.getProject(), getID(), "__mainsourcegroup" + getID(), false);
    auto moduleFromProject = exporter.getModuleFolderRelativeToProject (getID());
    auto moduleHeader      = moduleInfo.getHeader();

    auto& project = exporter.getProject();

    if (project.getEnabledModules().shouldCopyModuleFilesLocally (getID()))
        moduleHeader = project.getLocalModuleFolder (getID()).getChildFile (moduleHeader.getFileName());

    auto isModuleHeader = [&] (const File& f)  { return f.getFileName() == moduleHeader.getFileName(); };

    for (auto& sourceFile : sourceFiles)
    {
        auto pathWithinModule = build_tools::getRelativePathFrom (sourceFile, localModuleFolder);

        // (Note: in exporters like MSVC we have to avoid adding the same file twice, even if one of those instances
        // is flagged as being excluded from the build, because this overrides the other and it fails to compile)
        if ((exporter.canCopeWithDuplicateFiles() || ! compiled.contains (sourceFile)) && ! isModuleHeader (sourceFile))
            addFileWithGroups (sourceGroup, moduleFromProject.getChildFile (pathWithinModule), pathWithinModule);
    }

    sourceGroup.sortAlphabetically (true, true);
    sourceGroup.addFileAtIndex (moduleHeader, -1, false);

    exporter.getModulesGroup().state.appendChild (sourceGroup.state.createCopy(), nullptr);
}

//==============================================================================
EnabledModulesList::EnabledModulesList (Project& p, const ValueTree& s)
    : project (p), state (s)
{
}

StringArray EnabledModulesList::getAllModules() const
{
    StringArray moduleIDs;

    for (int i = 0; i < getNumModules(); ++i)
        moduleIDs.add (getModuleID (i));

    return moduleIDs;
}

void EnabledModulesList::createRequiredModules (OwnedArray<LibraryModule>& modules)
{
    for (int i = 0; i < getNumModules(); ++i)
        modules.add (new LibraryModule (getModuleInfo (getModuleID (i))));
}

void EnabledModulesList::sortAlphabetically()
{
    struct ModuleTreeSorter
    {
        static int compareElements (const ValueTree& m1, const ValueTree& m2)
        {
            return m1[Ids::ID].toString().compareIgnoreCase (m2[Ids::ID]);
        }
    };

    ModuleTreeSorter sorter;
    state.sort (sorter, getUndoManager(), false);
}

File EnabledModulesList::getDefaultModulesFolder() const
{
    File globalPath (getAppSettings().getStoredPath (Ids::defaultJuceModulePath, TargetOS::getThisOS()).get().toString());

    if (globalPath.exists())
        return globalPath;

    for (auto& exporterPathModule : project.getExporterPathsModulesList().getAllModules())
    {
        auto f = exporterPathModule.second;

        if (f.isDirectory())
            return f.getParentDirectory();
    }

    return File::getCurrentWorkingDirectory();
}

ModuleDescription EnabledModulesList::getModuleInfo (const String& moduleID) const
{
    return ModuleDescription (project.getModuleWithID (moduleID).second);
}

bool EnabledModulesList::isModuleEnabled (const String& moduleID) const
{
    return state.getChildWithProperty (Ids::ID, moduleID).isValid();
}

static void getDependencies (Project& project, const String& moduleID, StringArray& dependencies)
{
    auto info = project.getEnabledModules().getModuleInfo (moduleID);

    for (auto uid : info.getDependencies())
    {
        if (! dependencies.contains (uid, true))
        {
            dependencies.add (uid);
            getDependencies (project, uid, dependencies);
        }
    }
}

StringArray EnabledModulesList::getExtraDependenciesNeeded (const String& moduleID) const
{
    StringArray dependencies, extraDepsNeeded;
    getDependencies (project, moduleID, dependencies);

    for (auto dep : dependencies)
        if (dep != moduleID && ! isModuleEnabled (dep))
            extraDepsNeeded.add (dep);

    return extraDepsNeeded;
}

bool EnabledModulesList::tryToFixMissingDependencies (const String& moduleID)
{
    auto copyLocally = areMostModulesCopiedLocally();
    auto useGlobalPath = areMostModulesUsingGlobalPath();

    StringArray missing;

    for (auto missingModule : getExtraDependenciesNeeded (moduleID))
    {
        auto mod = project.getModuleWithID (missingModule);

        if (mod.second != File())
            addModule (mod.second, copyLocally, useGlobalPath);
        else
            missing.add (missingModule);
    }

    return (missing.size() == 0);
}

bool EnabledModulesList::doesModuleHaveHigherCppStandardThanProject (const String& moduleID) const
{
    auto projectCppStandard = project.getCppStandardString();

    if (projectCppStandard == Project::getCppStandardVars().getLast().toString())
        return false;

    auto moduleCppStandard = getModuleInfo (moduleID).getMinimumCppStandard();

    return (moduleCppStandard.getIntValue() > projectCppStandard.getIntValue());
}

bool EnabledModulesList::shouldUseGlobalPath (const String& moduleID) const
{
    return (bool) shouldUseGlobalPathValue (moduleID).getValue();
}

Value EnabledModulesList::shouldUseGlobalPathValue (const String& moduleID) const
{
    return state.getChildWithProperty (Ids::ID, moduleID)
                .getPropertyAsValue (Ids::useGlobalPath, getUndoManager());
}

bool EnabledModulesList::shouldShowAllModuleFilesInProject (const String& moduleID) const
{
    return (bool) shouldShowAllModuleFilesInProjectValue (moduleID).getValue();
}

Value EnabledModulesList::shouldShowAllModuleFilesInProjectValue (const String& moduleID) const
{
    return state.getChildWithProperty (Ids::ID, moduleID)
                .getPropertyAsValue (Ids::showAllCode, getUndoManager());
}

bool EnabledModulesList::shouldCopyModuleFilesLocally (const String& moduleID) const
{
    return (bool) shouldCopyModuleFilesLocallyValue (moduleID).getValue();
}

Value EnabledModulesList::shouldCopyModuleFilesLocallyValue (const String& moduleID) const
{
    return state.getChildWithProperty (Ids::ID, moduleID)
                .getPropertyAsValue (Ids::useLocalCopy, getUndoManager());
}

bool EnabledModulesList::areMostModulesUsingGlobalPath() const
{
    int numYes = 0, numNo = 0;

    for (auto i = getNumModules(); --i >= 0;)
    {
        if (shouldUseGlobalPath (getModuleID (i)))
            ++numYes;
        else
            ++numNo;
    }

    return numYes > numNo;
}

bool EnabledModulesList::areMostModulesCopiedLocally() const
{
    int numYes = 0, numNo = 0;

    for (auto i = getNumModules(); --i >= 0;)
    {
        if (shouldCopyModuleFilesLocally (getModuleID (i)))
            ++numYes;
        else
            ++numNo;
    }

    return numYes > numNo;
}

StringArray EnabledModulesList::getModulesWithHigherCppStandardThanProject() const
{
    StringArray list;

    for (auto& module : getAllModules())
        if (doesModuleHaveHigherCppStandardThanProject (module))
            list.add (module);

    return list;
}

StringArray EnabledModulesList::getModulesWithMissingDependencies() const
{
    StringArray list;

    for (auto& module : getAllModules())
        if (getExtraDependenciesNeeded (module).size() > 0)
            list.add (module);

    return list;
}

String EnabledModulesList::getHighestModuleCppStandard() const
{
    auto highestCppStandard = Project::getCppStandardVars()[0].toString();

    for (auto& mod : getAllModules())
    {
        auto moduleCppStandard = getModuleInfo (mod).getMinimumCppStandard();

        if (moduleCppStandard == "latest")
            return moduleCppStandard;

        if (moduleCppStandard.getIntValue() > highestCppStandard.getIntValue())
            highestCppStandard = moduleCppStandard;
    }

    return highestCppStandard;
}

void EnabledModulesList::addModule (const File& moduleFolder, bool copyLocally, bool useGlobalPath)
{
    ModuleDescription info (moduleFolder);

    if (info.isValid())
    {
        auto moduleID = info.getID();

        if (! isModuleEnabled (moduleID))
        {
            ValueTree module (Ids::MODULE);
            module.setProperty (Ids::ID, moduleID, getUndoManager());

            state.appendChild (module, getUndoManager());
            sortAlphabetically();

            shouldShowAllModuleFilesInProjectValue (moduleID) = true;
            shouldCopyModuleFilesLocallyValue (moduleID) = copyLocally;
            shouldUseGlobalPathValue (moduleID) = useGlobalPath;

            build_tools::RelativePath path (moduleFolder.getParentDirectory(),
                                            project.getProjectFolder(),
                                            build_tools::RelativePath::projectFolder);

            for (Project::ExporterIterator exporter (project); exporter.next();)
                exporter->getPathForModuleValue (moduleID) = path.toUnixStyle();

            if (! useGlobalPath)
                project.rescanExporterPathModules (false);
        }
    }
}

void EnabledModulesList::addModuleInteractive (const String& moduleID)
{
    auto f = project.getModuleWithID (moduleID).second;

    if (f != File())
    {
        addModule (f, areMostModulesCopiedLocally(), areMostModulesUsingGlobalPath());
        return;
    }

    addModuleFromUserSelectedFile();
}

void EnabledModulesList::addModuleFromUserSelectedFile()
{
    auto lastLocation = getDefaultModulesFolder();

    FileChooser fc ("Select a module to add...", lastLocation, {});

    if (fc.browseForDirectory())
    {
        lastLocation = fc.getResult();
        addModuleOfferingToCopy (lastLocation, true);
    }
}

void EnabledModulesList::addModuleOfferingToCopy (const File& f, bool isFromUserSpecifiedFolder)
{
    ModuleDescription m (f);

    if (! m.isValid())
    {
        AlertWindow::showMessageBoxAsync (AlertWindow::InfoIcon,
                                          "Add Module", "This wasn't a valid module folder!");
        return;
    }

    if (isModuleEnabled (m.getID()))
    {
        AlertWindow::showMessageBoxAsync (AlertWindow::InfoIcon,
                                          "Add Module", "The project already contains this module!");
        return;
    }

    addModule (m.getModuleFolder(), areMostModulesCopiedLocally(),
               isFromUserSpecifiedFolder ? false : areMostModulesUsingGlobalPath());
}

void EnabledModulesList::removeModule (String moduleID) // must be pass-by-value, and not a const ref!
{
    for (auto i = state.getNumChildren(); --i >= 0;)
        if (state.getChild(i) [Ids::ID] == moduleID)
            state.removeChild (i, getUndoManager());

    for (Project::ExporterIterator exporter (project); exporter.next();)
        exporter->removePathForModule (moduleID);
}