// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: 2024 A-La-Karte Contributors

#include "lutrisimporter.h"

#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QJsonArray>
#include <QJsonDocument>
#include <QJsonObject>
#include <QProcess>
#include <QStandardPaths>

LutrisImporter::LutrisImporter(QObject *parent)
    : PlatformImporter(parent)
{
}

QString LutrisImporter::platformName() const
{
    return QStringLiteral("Lutris");
}

QString LutrisImporter::platformId() const
{
    return QStringLiteral("lutris");
}

bool LutrisImporter::isAvailable() const
{
    return !findExecutable(QStringLiteral("lutris")).isEmpty() || directoryExists(findLutrisDataPath());
}

QString LutrisImporter::findLutrisDataPath() const
{
    QStringList possiblePaths = {expandPath(QStringLiteral("~/.local/share/lutris")), expandPath(QStringLiteral("~/.var/app/net.lutris.Lutris/data/lutris"))};

    for (const QString &path : possiblePaths) {
        if (directoryExists(path)) {
            return path;
        }
    }

    return {};
}

QString LutrisImporter::findLutrisCachePath() const
{
    QStringList possiblePaths = {expandPath(QStringLiteral("~/.cache/lutris")), expandPath(QStringLiteral("~/.var/app/net.lutris.Lutris/cache/lutris"))};

    for (const QString &path : possiblePaths) {
        if (directoryExists(path)) {
            return path;
        }
    }

    return {};
}

QUrl LutrisImporter::findCoverImage(const QString &slug) const
{
    QString cachePath = findLutrisCachePath();
    if (cachePath.isEmpty()) {
        return {};
    }

    // Check coverart directory
    QString coverartDir = cachePath + QStringLiteral("/coverart");
    QStringList extensions = {QStringLiteral(".jpg"), QStringLiteral(".png"), QStringLiteral(".webp")};

    for (const QString &ext : extensions) {
        QString coverPath = coverartDir + QStringLiteral("/") + slug + ext;
        if (QFile::exists(coverPath)) {
            return QUrl::fromLocalFile(coverPath);
        }
    }

    // Check banners directory as fallback
    QString bannersDir = cachePath + QStringLiteral("/banners");
    for (const QString &ext : extensions) {
        QString bannerPath = bannersDir + QStringLiteral("/") + slug + ext;
        if (QFile::exists(bannerPath)) {
            return QUrl::fromLocalFile(bannerPath);
        }
    }

    return {};
}

QList<Game *> LutrisImporter::importGames()
{
    QList<Game *> games;

    // Try using lutris CLI first
    QString lutrisPath = findExecutable(QStringLiteral("lutris"));
    if (!lutrisPath.isEmpty()) {
        QProcess process;
        process.start(lutrisPath, {QStringLiteral("-lo"), QStringLiteral("--json")});

        if (process.waitForFinished(30000)) {
            QByteArray output = process.readAllStandardOutput();
            QJsonDocument doc = QJsonDocument::fromJson(output);

            if (doc.isArray()) {
                QJsonArray gamesArray = doc.array();
                int current = 0;
                int total = gamesArray.count();

                for (const QJsonValue &value : gamesArray) {
                    if (!value.isObject())
                        continue;

                    QJsonObject obj = value.toObject();
                    QString id = obj[QStringLiteral("id")].toString();
                    QString name = obj[QStringLiteral("name")].toString();
                    QString slug = obj[QStringLiteral("slug")].toString();
                    QString runner = obj[QStringLiteral("runner")].toString();
                    QString directory = obj[QStringLiteral("directory")].toString();

                    if (name.isEmpty())
                        continue;

                    Game *game = new Game(QStringLiteral("lutris-%1").arg(slug.isEmpty() ? id : slug), name);
                    game->setPlatform(platformName());
                    game->setPlatformId(slug.isEmpty() ? id : slug);
                    game->setLaunchCommand(QStringLiteral("lutris lutris:rungameid/%1").arg(id));
                    game->setWorkingDirectory(directory);
                    game->setInstalled(true);

                    // Find cover
                    QUrl coverUrl = findCoverImage(slug);
                    if (coverUrl.isValid()) {
                        game->setCoverUrl(coverUrl);
                    }

                    games.append(game);
                    current++;
                    Q_EMIT importProgress(current, total);
                }
            }
        }
    }

    // If CLI didn't work, try reading the database directly
    if (games.isEmpty()) {
        QString dataPath = findLutrisDataPath();
        if (dataPath.isEmpty()) {
            return games;
        }

        QString gamesDir = dataPath + QStringLiteral("/games");
        QDir dir(gamesDir);

        if (!dir.exists()) {
            return games;
        }

        QStringList yamlFiles = dir.entryList({QStringLiteral("*.yml")}, QDir::Files);
        int current = 0;
        int total = yamlFiles.count();

        for (const QString &file : yamlFiles) {
            QFile gameFile(gamesDir + QStringLiteral("/") + file);
            if (!gameFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
                continue;
            }

            // Simple YAML parsing for game config
            QString content = QString::fromUtf8(gameFile.readAll());
            QString name, slug, runner;

            QStringList lines = content.split(QLatin1Char('\n'));
            for (const QString &line : lines) {
                if (line.startsWith(QLatin1String("name:"))) {
                    name = line.mid(5).trimmed();
                } else if (line.startsWith(QLatin1String("slug:"))) {
                    slug = line.mid(5).trimmed();
                } else if (line.startsWith(QLatin1String("runner:"))) {
                    runner = line.mid(7).trimmed();
                }
            }

            if (name.isEmpty()) {
                // Use filename without extension
                name = QFileInfo(file).baseName();
            }

            if (slug.isEmpty()) {
                slug = QFileInfo(file).baseName();
            }

            Game *game = new Game(QStringLiteral("lutris-%1").arg(slug), name);
            game->setPlatform(platformName());
            game->setPlatformId(slug);
            game->setLaunchCommand(QStringLiteral("lutris lutris:rungame/%1").arg(slug));
            game->setInstalled(true);

            QUrl coverUrl = findCoverImage(slug);
            if (coverUrl.isValid()) {
                game->setCoverUrl(coverUrl);
            }

            games.append(game);
            current++;
            Q_EMIT importProgress(current, total);
        }
    }

    return games;
}