#include "settings.h"

#include <QDebug>
#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QStandardPaths>

QString Settings::configPath()
{
    const QString dir = QStringLiteral("/home/nemo/.config/harbour");
    QDir().mkpath(dir);
    return dir + QStringLiteral("/calibreweb.conf");
}

Settings::Settings(QObject *parent)
    : QObject(parent)
    , m_settings(configPath(), QSettings::IniFormat)
{
    migrateIfNeeded();
    openPermissions();
    // diagnostica: path reale del file di configurazione e valori letti all'avvio
    qDebug() << "Settings file:" << m_settings.fileName();
    if (m_settings.status() != QSettings::NoError)
        qDebug() << "Settings WARNING: file di configurazione non accessibile (permessi?)";
    qDebug() << "Settings read: serverUrl=[" << serverUrl() << "] user=[" << username()
             << "] ssl=" << ignoreSslErrors() << "margin=" << readerMargin()
             << "marginV=" << readerMarginV();
}

void Settings::migrateIfNeeded()
{
    if (!serverUrl().isEmpty())
        return; // il file condiviso ha gia' una configurazione
    // Sorgenti candidate: config per-utente corrente + i path noti degli altri
    // utenti (launcher=nemo, debug SSH=defaultuser). La prima con valori vince.
    const QStringList candidates = QStringList()
            << QSettings(QStringLiteral("harbour"), QStringLiteral("calibreweb")).fileName()
            << QStringLiteral("/home/nemo/.config/harbour/calibreweb.conf")
            << QStringLiteral("/home/defaultuser/.config/harbour/calibreweb.conf");
    for (const QString &cand : candidates) {
        QSettings src(cand, QSettings::IniFormat);
        const QString url = src.value(QStringLiteral("serverUrl")).toString();
        if (url.isEmpty())
            continue;
        m_settings.setValue(QStringLiteral("serverUrl"), url);
        m_settings.setValue(QStringLiteral("username"), src.value(QStringLiteral("username")));
        m_settings.setValue(QStringLiteral("password"), src.value(QStringLiteral("password")));
        m_settings.setValue(QStringLiteral("ignoreSslErrors"),
                            src.value(QStringLiteral("ignoreSslErrors")));
        m_settings.setValue(QStringLiteral("readerMargin"),
                            src.value(QStringLiteral("readerMargin"), 24));
        m_settings.setValue(QStringLiteral("readerMarginV"),
                            src.value(QStringLiteral("readerMarginV"), 0));
        // segnalibri di lettura per libro+formato
        src.beginGroup(QStringLiteral("bookmarks"));
        const QStringList groups = src.childGroups();
        for (const QString &g : groups) {
            src.beginGroup(g);
            const QStringList keys = src.childKeys();
            for (const QString &k : keys)
                m_settings.setValue(QStringLiteral("bookmarks/%1/%2").arg(g).arg(k),
                                    src.value(k));
            src.endGroup();
        }
        src.endGroup();
        m_settings.sync();
        openPermissions();
        qDebug() << "Settings: importati i valori da" << cand;
        return;
    }
}

void Settings::openPermissions()
{
    // Apre la catena di directory e il file di configurazione: la home di
    // nemo e' 700 di default e defaultuser (debug SSH) non puo' entrarci.
    // Al primo avvio dal launcher (nemo) questi permessi restano aperti, e
    // da quel momento entrambi gli utenti condividono lo stesso file.
    QDir home(QStringLiteral("/home/nemo"));
    QFile::setPermissions(home.absolutePath(),
                          QFile::ReadOwner | QFile::WriteOwner | QFile::ExeOwner
                          | QFile::ReadGroup | QFile::ExeGroup
                          | QFile::ReadOther | QFile::ExeOther);
    QDir config(QStringLiteral("/home/nemo/.config"));
    QFile::setPermissions(config.absolutePath(),
                          QFile::ReadOwner | QFile::WriteOwner | QFile::ExeOwner
                          | QFile::ReadGroup | QFile::ExeGroup
                          | QFile::ReadOther | QFile::ExeOther);
    QDir dir(QFileInfo(m_settings.fileName()).absolutePath());
    QFile::setPermissions(dir.absolutePath(),
                          QFile::ReadOwner | QFile::WriteOwner | QFile::ExeOwner
                          | QFile::ReadGroup | QFile::WriteGroup | QFile::ExeGroup
                          | QFile::ReadOther | QFile::WriteOther | QFile::ExeOther);
    QFile::setPermissions(m_settings.fileName(),
                          QFile::ReadOwner | QFile::WriteOwner
                          | QFile::ReadGroup | QFile::WriteGroup
                          | QFile::ReadOther | QFile::WriteOther);
}

QString Settings::serverUrl() const
{
    return m_settings.value(QStringLiteral("serverUrl")).toString();
}

void Settings::setServerUrl(const QString &value)
{
    if (value == serverUrl())
        return;
    m_settings.setValue(QStringLiteral("serverUrl"), value);
    m_settings.sync(); // scrivi subito su disco: l'app può crashare alla chiusura (WebView)
    openPermissions();
    emit serverUrlChanged();
    emit baseUrlChanged();
}

QString Settings::username() const
{
    return m_settings.value(QStringLiteral("username")).toString();
}

void Settings::setUsername(const QString &value)
{
    if (value == username())
        return;
    m_settings.setValue(QStringLiteral("username"), value);
    m_settings.sync();
    openPermissions();
    emit usernameChanged();
}

QString Settings::password() const
{
    return m_settings.value(QStringLiteral("password")).toString();
}

void Settings::setPassword(const QString &value)
{
    if (value == password())
        return;
    m_settings.setValue(QStringLiteral("password"), value);
    m_settings.sync();
    openPermissions();
    emit passwordChanged();
}

bool Settings::ignoreSslErrors() const
{
    return m_settings.value(QStringLiteral("ignoreSslErrors"), false).toBool();
}

void Settings::setIgnoreSslErrors(bool value)
{
    if (value == ignoreSslErrors())
        return;
    m_settings.setValue(QStringLiteral("ignoreSslErrors"), value);
    m_settings.sync();
    openPermissions();
    emit ignoreSslErrorsChanged();
}

int Settings::readerMargin() const
{
    return m_settings.value(QStringLiteral("readerMargin"), 24).toInt();
}

void Settings::setReaderMargin(int value)
{
    if (value == readerMargin())
        return;
    m_settings.setValue(QStringLiteral("readerMargin"), value);
    m_settings.sync();
    openPermissions();
    emit readerMarginChanged();
}

int Settings::readerMarginV() const
{
    return m_settings.value(QStringLiteral("readerMarginV"), 0).toInt();
}

void Settings::setReaderMarginV(int value)
{
    if (value == readerMarginV())
        return;
    m_settings.setValue(QStringLiteral("readerMarginV"), value);
    m_settings.sync();
    openPermissions();
    emit readerMarginVChanged();
}

QString Settings::language() const
{
    return m_settings.value(QStringLiteral("language"), QStringLiteral("system")).toString();
}

void Settings::setLanguage(const QString &value)
{
    if (value == language())
        return;
    m_settings.setValue(QStringLiteral("language"), value);
    m_settings.sync();
    openPermissions();
    emit languageChanged();
}

QString Settings::downloadDir() const
{
    QString dir = QStandardPaths::writableLocation(QStandardPaths::DownloadLocation);
    if (dir.isEmpty())
        dir = QStringLiteral("/home/nemo/Downloads");
    QDir().mkpath(dir);
    return dir;
}

QString Settings::authHeader() const
{
    const QString user = username();
    if (user.isEmpty())
        return QString();
    const QString credentials = user + QLatin1Char(':') + password();
    return QStringLiteral("Basic ") + QString::fromLatin1(credentials.toUtf8().toBase64());
}

QString Settings::baseUrl() const
{
    QString url = serverUrl().trimmed();
    while (url.endsWith(QLatin1Char('/')))
        url.chop(1);
    return url;
}

QString Settings::bookmarkKey(int bookId, const QString &format) const
{
    return m_settings.value(QStringLiteral("bookmarks/%1/%2").arg(bookId).arg(format))
            .toString();
}

void Settings::setBookmarkKey(int bookId, const QString &format, const QString &key)
{
    m_settings.setValue(QStringLiteral("bookmarks/%1/%2").arg(bookId).arg(format), key);
    m_settings.sync();
    openPermissions();
}

QString Settings::bookFilePath(int bookId, const QString &format) const
{
    const QString dir = QStandardPaths::writableLocation(QStandardPaths::CacheLocation)
            + QStringLiteral("/books");
    QDir().mkpath(dir);
    return dir + QStringLiteral("/%1.%2").arg(bookId).arg(format);
}