/**
 * @file lldir_mac.cpp
 * @brief Implementation of directory utilities for macOS
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2026, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#if LL_DARWIN

#include "linden_common.h"

#include "lldir_mac.h"
#include "llerror.h"
#include "llrand.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <glob.h>
#include <filesystem>
#include "lldir_utils_objc.h"

// --------------------------------------------------------------------------------

static bool CreateDirectory(const std::string &parent,
                            const std::string &child,
                            std::string *fullname)
{

    std::filesystem::path p(parent);
    p /= child;

    if (fullname)
        *fullname = std::string(p.string());

    if (! std::filesystem::create_directory(p))
    {
        return (std::filesystem::is_directory(p));
    }
    return true;
}

// --------------------------------------------------------------------------------

LLDir_Mac::LLDir_Mac()
{
    mDirDelimiter = "/";

    const std::string     secondLifeString = "Megapahit";

    std::string executablepathstr = getSystemExecutableFolder();

    //NOTE:  LLINFOS/LLERRS will not output to log here.  The streams are not initialized.

    if (!executablepathstr.empty())
    {
        // mExecutablePathAndName
        mExecutablePathAndName = executablepathstr;

        std::filesystem::path executablepath(executablepathstr);

        mExecutableFilename = executablepath.filename().string();
        mExecutableDir = executablepath.parent_path().string();

        // mAppRODataDir
        std::string resourcepath = getSystemResourceFolder();
        mAppRODataDir = resourcepath;

        // *NOTE: When running in a dev tree, use the copy of
        // skins in indra/newview/ rather than in the application bundle.  This
        // mirrors Windows dev environment behavior and allows direct checkin
        // of edited skins/xui files. JC

        // MBW -- This keeps the mac application from finding other things.
        // If this is really for skins, it should JUST apply to skins.

        std::string::size_type build_dir_pos = mExecutableDir.rfind("/build-darwin-");
        if (build_dir_pos != std::string::npos)
        {
            // ...we're in a dev checkout
            mSkinBaseDir = mExecutableDir.substr(0, build_dir_pos)
                + "/indra/newview/skins";
            LL_INFOS() << "Running in dev checkout with mSkinBaseDir "
                << mSkinBaseDir << LL_ENDL;
        }
        else
        {
            // ...normal installation running
            mSkinBaseDir = mAppRODataDir + mDirDelimiter + "skins";
        }

        // mOSUserDir
        std::string appdir = getSystemApplicationSupportFolder();
        std::string rootdir;

        //Create root directory
        if (CreateDirectory(appdir, secondLifeString, &rootdir))
        {

            // Save the full path to the folder
            mOSUserDir = rootdir;

            // Create our sub-dirs
            CreateDirectory(rootdir, std::string("data"), NULL);
            CreateDirectory(rootdir, std::string("logs"), NULL);
            CreateDirectory(rootdir, std::string("user_settings"), NULL);
            CreateDirectory(rootdir, std::string("browser_profile"), NULL);
        }

        //mOSCacheDir
        std::string cachedir =  getSystemCacheFolder();
        if (!cachedir.empty())
        {
            mOSCacheDir = cachedir;
            //TODO:  This changes from ~/Library/Cache/Secondlife to ~/Library/Cache/com.app.secondlife/Secondlife.  Last dir level could go away.
            CreateDirectory(mOSCacheDir, secondLifeString, NULL);
        }

        // mOSUserAppDir
        mOSUserAppDir = mOSUserDir;

        // mExecutableDir == .../MyApp.app/Contents/MacOS
        std::string bundle_root; // .../MyApp.app
        if (!mExecutableDir.empty())
        {
            std::string contents_dir = getDirName(mExecutableDir);   // .../MyApp.app/Contents
            if (!contents_dir.empty())
            {
                bundle_root = getDirName(contents_dir);              // .../MyApp.app
            }
        }
        std::string install_root = bundle_root.empty() ? std::string() : getDirName(bundle_root);
        bool is_applications_install = (install_root.rfind("/Applications", 0) == 0);
        bool is_dmg = (mExecutablePathAndName.rfind("/Volumes/", 0) == 0);
        bool is_translocated = (mExecutablePathAndName.find("/AppTranslocation/") != std::string::npos);

#if LL_VELOPACK
        // Detect a portable (Velopack) install: the executable lives at
        // ".../MyApp.app/Contents/MacOS/<exe>". If the portable package
        // dropped a ".portable" marker next to "MyApp.app" (i.e. one level
        // above the bundle itself), keep user data (settings, logs, etc.)
        // beside the bundle instead of ~/Library/Application Support. This
        // only applies to Velopack-portable builds; a DMG/NSIS-style
        // install never produces this marker, so a normally-installed
        // viewer is unaffected.if (!is_dmg && !is_translocated && !is_applications_install && !install_root.empty())

        // macos doesn't have the .portable marker , but check it just in case.
        // Todo: fix this, portable installs should have a marker file.
        bool is_portable = isPortableInstall(install_root);

        if (is_portable)
        {
            std::string portable_dir;
            if (CreateDirectory(install_root, PORTABLE_USER_DATA_DIRNAME, &portable_dir))
            {
                mOSUserAppDir = portable_dir;

                // Replicate the sub-dirs already created above under the
                // default mOSUserDir, but under the portable folder instead.
                CreateDirectory(portable_dir, std::string("data"), NULL);
                CreateDirectory(portable_dir, std::string("logs"), NULL);
                CreateDirectory(portable_dir, std::string("user_settings"), NULL);
                CreateDirectory(portable_dir, std::string("browser_profile"), NULL);
            }
        }
#endif // LL_VELOPACK

        if (is_dmg)
        {
            // Running directly off a still-mounted DMG; the user never
            // dragged the app out to install it.
            mRunContextDescription = "Mounted disk image (DMG)";
        }
        else if (is_translocated)
        {
            // Gatekeeper's App Translocation makes an unregistered, quarantined
            // app (e.g. one simply unzipped in Downloads/ and double-clicked
            // without ever being moved) appear to run from a randomized
            // read-only path under
            // "/private/var/folders/.../AppTranslocation/.../d/MyApp.app",
            // even though the on-disk bundle still lives wherever it was
            // extracted.
            mRunContextDescription = "App Translocation (unregistered/quarantined copy)";
        }
        else if (is_applications_install)
        {
            // Bundle lives directly under /Applications: a normal, properly
            // installed copy.
            mRunContextDescription = "Standard install (/Applications)";
        }
#if LL_VELOPACK
        else if (is_portable)
        {
            mRunContextDescription = "Portable (extracted archive, " + install_root + ")";
        }
#endif // LL_VELOPACK
        else if (!is_dmg && !is_translocated && !is_applications_install && !install_root.empty())
        {
            mRunContextDescription = "Running from a non-standard folder (" + install_root + ")";
        }
        else if (!install_root.empty())
        {
            // Bundle is present on local disk, intact, and not translocated
            // or mounted from a DMG, but it is NOT under /Applications. This
            // is the classic "downloaded a zip/tar, extracted it somewhere,
            // and ran the .app directly from that folder" case - i.e. what
            // users may call a "portable" install even though no formal
            // portable packaging was used.
            mRunContextDescription = "Running from extracted archive or non-standard folder (" + install_root + ")";
        }
        else
        {
            mRunContextDescription = "Unknown install location";
        }

        // mTempDir
        //Aura 120920 std::filesystem::temp_directory_path() not yet implemented on mac. :(
        std::string tmpdir = getSystemTempFolder();
        if (!tmpdir.empty())
        {
            CreateDirectory(tmpdir, secondLifeString, &mTempDir);
        }

        mWorkingDir = getCurPath();

        mLLPluginDir = mAppRODataDir + mDirDelimiter + "SLPlugin.app" + mDirDelimiter + "Contents" + mDirDelimiter + "Frameworks";
    }
}

LLDir_Mac::~LLDir_Mac()
{
}

// Implementation


void LLDir_Mac::initAppDirs(const std::string &app_name,
                            const std::string& app_read_only_data_dir)
{
    // Allow override so test apps can read newview directory
    if (!app_read_only_data_dir.empty())
    {
        mAppRODataDir = app_read_only_data_dir;
        mSkinBaseDir = add(mAppRODataDir, "skins");
    }
    mCAFile = add(mAppRODataDir, "ca-bundle.crt");
}

std::string LLDir_Mac::getCurPath()
{
    return std::filesystem::path( std::filesystem::current_path() ).string();
}

/*virtual*/ std::string LLDir_Mac::getLLPluginLauncher()
{
    return gDirUtilp->getAppRODataDir() + gDirUtilp->getDirDelimiter() +
        "SLPlugin.app/Contents/MacOS/SLPlugin";
}

/*virtual*/ std::string LLDir_Mac::getLLPluginFilename(std::string base_name)
{
    return gDirUtilp->getLLPluginDir() + gDirUtilp->getDirDelimiter() +
        base_name + ".dylib";
}


#endif // LL_DARWIN