#include "settings.h"

#include <QEventLoop>
#include <QUrl>

#include <qt6keychain/keychain.h>

namespace {
const QLatin1String kService("photogallery-uploader");
const QLatin1String kPasswordKey("password");
} // namespace

Settings::Settings()
    : m_settings(QStringLiteral("inflo.ws"), QStringLiteral("photogallery-uploader"))
{
}

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

void Settings::setBaseUrl(const QString &value)
{
    m_settings.setValue(QStringLiteral("baseUrl"), normalizeBaseUrl(value));
}

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

void Settings::setUsername(const QString &value)
{
    m_settings.setValue(QStringLiteral("username"), value.trimmed());
}

QString Settings::readPassword() const
{
    QKeychain::ReadPasswordJob job(kService);
    job.setAutoDelete(false);
    job.setKey(kPasswordKey);

    QEventLoop loop;
    QObject::connect(&job, &QKeychain::Job::finished, &loop, &QEventLoop::quit);
    job.start();
    loop.exec();

    if (job.error() != QKeychain::NoError)
        return QString();
    return job.textData();
}

void Settings::writePassword(const QString &value) const
{
    QKeychain::WritePasswordJob job(kService);
    job.setAutoDelete(false);
    job.setKey(kPasswordKey);
    job.setTextData(value);

    QEventLoop loop;
    QObject::connect(&job, &QKeychain::Job::finished, &loop, &QEventLoop::quit);
    job.start();
    loop.exec();
}

bool Settings::isConfigured() const
{
    return !baseUrl().isEmpty() && !username().isEmpty() && !readPassword().isEmpty();
}

Settings::LastPost Settings::lastPost() const
{
    LastPost p;
    p.slug = m_settings.value(QStringLiteral("last/slug")).toString();
    p.url = m_settings.value(QStringLiteral("last/url")).toString();
    p.caption = m_settings.value(QStringLiteral("last/caption")).toString();
    p.postedAt = m_settings.value(QStringLiteral("last/postedAt")).toDateTime();
    return p;
}

void Settings::setLastPost(const LastPost &value)
{
    m_settings.setValue(QStringLiteral("last/slug"), value.slug);
    m_settings.setValue(QStringLiteral("last/url"), value.url);
    m_settings.setValue(QStringLiteral("last/caption"), value.caption);
    m_settings.setValue(QStringLiteral("last/postedAt"), value.postedAt);
}

QString Settings::validateBaseUrl(const QString &raw)
{
    const QString trimmed = raw.trimmed();
    if (trimmed.isEmpty())
        return QStringLiteral("Base URL is required");
    const QUrl url(trimmed);
    if (!url.isValid() || url.host().isEmpty())
        return QStringLiteral("Not a valid URL");
    if (url.scheme() != QStringLiteral("https"))
        return QStringLiteral("Must be https — plain http sends your password in the clear");
    return QString();
}

QString Settings::normalizeBaseUrl(const QString &raw)
{
    QString v = raw.trimmed();
    while (v.endsWith(QLatin1Char('/')))
        v.chop(1);
    if (v.endsWith(QStringLiteral("/upload"), Qt::CaseInsensitive))
        v.chop(QStringLiteral("/upload").size());
    while (v.endsWith(QLatin1Char('/')))
        v.chop(1);
    return v;
}