/*
    SPDX-FileCopyrightText: 2007-2008 Robert Knight <robertknight@gmail.com>

    SPDX-License-Identifier: GPL-2.0-or-later
*/

#include "ProfileModel.h"
#include "Profile.h"
#include "ProfileManager.h"

#include <KLocalizedString>

#include <QDebug>
#include <QIcon>

using namespace Konsole;

ProfileModel *ProfileModel::instance()
{
    static ProfileModel self;
    return &self;
}

ProfileModel::ProfileModel()
{
    connect(ProfileManager::instance(), &ProfileManager::profileAdded, this, &ProfileModel::add);
    connect(ProfileManager::instance(), &ProfileManager::profileRemoved, this, &ProfileModel::remove);
    connect(ProfileManager::instance(), &ProfileManager::profileChanged, this, &ProfileModel::update);
    populate();
}
int ProfileModel::rowCount(const QModelIndex &unused) const
{
    Q_UNUSED(unused)

    // All profiles plus the built-in profile that's always on top
    return m_profiles.count();
}

int ProfileModel::columnCount(const QModelIndex &unused) const
{
    Q_UNUSED(unused)
    return COLUMNS;
}

QVariant ProfileModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if (orientation == Qt::Vertical) {
        return {};
    }
    if (role != Qt::DisplayRole) {
        return {};
    }

    switch (section) {
    case NAME:
        return i18nc("@title:column Profile name", "Name");
    case SHORTCUT:
        return i18nc("@title:column Profile keyboard shortcut", "Shortcut");
    }
    return {};
}

QVariant ProfileModel::data(const QModelIndex &idx, int role) const
{
    if (!idx.isValid()) {
        return {};
    }

    if (idx.row() > m_profiles.count()) {
        return {};
    }

    auto profile = m_profiles.at(idx.row());

    switch (idx.column()) {
    case NAME: {
        switch (role) {
        case Qt::DisplayRole: {
            QString txt = profile->name();
            if (profile->isBuiltin()) {
                txt += i18nc("@label:textbox added to the name of the built-in profile, to point out it's read-only", " [Read-only]");
            }

            if (ProfileManager::instance()->defaultProfile() == profile) {
                txt += i18nc("@label:textbox added to the name of the current default profile", " [Default]");
            }

            return txt;
        }
        case Qt::DecorationRole:
            return QIcon::fromTheme(profile->icon());
        case Qt::FontRole:
            if (ProfileManager::instance()->defaultProfile() == profile) {
                QFont font;
                font.setBold(true);
                return font;
            }
            break;
        case Qt::ToolTipRole:
            return profile->isBuiltin() ? i18nc("@info:tooltip", "Built-in profile is always available") : profile->path();
        }
    } break;

    case SHORTCUT: {
        auto shortcut = ProfileManager::instance()->shortcut(profile);
        switch (role) {
        case Qt::DisplayRole:
            return shortcut;
        case Qt::EditRole:
            return shortcut;
        case Qt::ToolTipRole:
            return i18nc("@info:tooltip", "Double click to change shortcut");
        }
        break;
    }

    case PROFILE: {
        switch (role) {
        case ProfilePtrRole:
            return QVariant::fromValue(profile);
        case Qt::DisplayRole:
            return profile->name();
        case Qt::DecorationRole:
            return QIcon::fromTheme(profile->icon());
        }
    }
    }

    return {};
}

Qt::ItemFlags ProfileModel::flags(const QModelIndex &idx) const
{
    auto currentFlags = QAbstractTableModel::flags(idx);

    switch (idx.column()) {
    case NAME:
        return currentFlags & (~Qt::ItemIsEditable);
    case SHORTCUT:
        return currentFlags | Qt::ItemIsEditable;
    default:;
    }
    return currentFlags;
}

bool ProfileModel::setData(const QModelIndex &idx, const QVariant &value, int role)
{
    if (!idx.isValid()) {
        return false;
    }

    if (idx.column() != SHORTCUT) {
        return false;
    }

    if (role != Qt::EditRole && role != Qt::DisplayRole) {
        return false;
    }

    auto profile = m_profiles.at(idx.row());
    if (idx.column() == SHORTCUT) {
        auto sequence = QKeySequence::fromString(value.toString());
        ProfileManager::instance()->setShortcut(profile, sequence);
        Q_EMIT dataChanged(idx, idx, {Qt::DisplayRole});
        return true;
    }

    return false;
}

void ProfileModel::populate()
{
    beginResetModel();
    m_profiles = ProfileManager::instance()->allProfiles();
    endResetModel();
}

void ProfileModel::add(QExplicitlySharedDataPointer<Profile> profile)
{
    // The model is too small for this to matter.
    Q_UNUSED(profile)
    populate();
}

void ProfileModel::remove(QExplicitlySharedDataPointer<Profile> profile)
{
    // The model is too small for this to matter.
    Q_UNUSED(profile)
    populate();
}

void ProfileModel::setDefault(QExplicitlySharedDataPointer<Profile> profile)
{
    Q_UNUSED(profile)
    Q_EMIT dataChanged(index(0, 0), index(0, COLUMNS - 1), {Qt::DisplayRole});
}

void ProfileModel::update(QExplicitlySharedDataPointer<Profile> profile)
{
    int row = m_profiles.indexOf(profile);
    dataChanged(index(row, 0), index(row, COLUMNS - 1));
    // Resort as the profile name could have changed
    populate();
}
