// SPDX-License-Identifier: LGPL-2.1-or-later

/***************************************************************************
 *   Copyright (c) 2025 Kindred Systems                                    *
 *                                                                         *
 *   This file is part of Kindred Create.                                  *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 of the License, or (at your option) any later version.      *
 *                                                                         *
 *   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 Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/

#include "BreadcrumbToolBar.h"
#include "EditingContext.h"

#include <QColor>
#include <QLabel>
#include <QToolButton>

#include "Application.h"
#include "Document.h"

using namespace Gui;

// ---------------------------------------------------------------------------
// Stylesheet template for breadcrumb chip buttons
// ---------------------------------------------------------------------------

static QString chipStyle(const QString& bgHex)
{
    // Darken background slightly for contrast, use white text
    QColor bg(bgHex);
    QColor textColor(QStringLiteral("#cdd6f4"));  // Catppuccin Text

    return QStringLiteral(
               "QToolButton {"
               "  background-color: %1;"
               "  color: %2;"
               "  border: none;"
               "  border-radius: 4px;"
               "  padding: 2px 8px;"
               "  font-weight: bold;"
               "  font-size: 11px;"
               "}"
               "QToolButton:hover {"
               "  background-color: %3;"
               "}"
               "QToolButton:pressed {"
               "  background-color: %4;"
               "}"
    )
        .arg(bg.name(), textColor.name(), bg.lighter(120).name(), bg.darker(120).name());
}

static QString separatorStyle()
{
    return QStringLiteral(
        "QLabel {"
        "  color: #6c7086;"  // Catppuccin Overlay0
        "  font-size: 11px;"
        "  padding: 0 2px;"
        "}"
    );
}


// ---------------------------------------------------------------------------
// Construction
// ---------------------------------------------------------------------------

BreadcrumbToolBar::BreadcrumbToolBar(QWidget* parent)
    : QToolBar(parent)
{
    setObjectName(QStringLiteral("BreadcrumbToolBar"));
    setWindowTitle(tr("Editing Context"));
    setMovable(false);
    setFloatable(false);
    setIconSize(QSize(16, 16));

    // Thin toolbar with minimal margins
    setStyleSheet(QStringLiteral(
        "QToolBar {"
        "  background: #1e1e2e;"  // Catppuccin Base
        "  border: none;"
        "  spacing: 2px;"
        "  padding: 2px 4px;"
        "  max-height: 24px;"
        "}"
    ));
}


// ---------------------------------------------------------------------------
// Update display from context
// ---------------------------------------------------------------------------

void BreadcrumbToolBar::updateContext(const EditingContext& ctx)
{
    clearSegments();
    buildSegments(ctx);
}


// ---------------------------------------------------------------------------
// Build breadcrumb segments
// ---------------------------------------------------------------------------

void BreadcrumbToolBar::clearSegments()
{
    for (auto* btn : _segments) {
        removeAction(btn->defaultAction());
        delete btn;
    }
    _segments.clear();

    for (auto* sep : _separators) {
        delete sep;
    }
    _separators.clear();

    clear();
}

void BreadcrumbToolBar::buildSegments(const EditingContext& ctx)
{
    if (ctx.breadcrumb.isEmpty()) {
        return;
    }

    for (int i = 0; i < ctx.breadcrumb.size(); ++i) {
        // Add separator between segments
        if (i > 0) {
            auto* sep = new QLabel(QStringLiteral("\u203A"));  // › character
            sep->setStyleSheet(separatorStyle());
            addWidget(sep);
            _separators.append(sep);
        }

        auto* btn = new QToolButton(this);
        btn->setText(ctx.breadcrumb[i]);
        btn->setAutoRaise(true);

        // Apply color from breadcrumb colors
        QString color;
        if (i < ctx.breadcrumbColors.size()) {
            color = ctx.breadcrumbColors[i];
        }
        else {
            color = ctx.color;
        }
        btn->setStyleSheet(chipStyle(color));

        // Make clickable: clicking a parent segment navigates up
        int segmentIndex = i;
        connect(btn, &QToolButton::clicked, this, [this, segmentIndex]() {
            segmentClicked(segmentIndex);
        });

        addWidget(btn);
        _segments.append(btn);
    }
}


// ---------------------------------------------------------------------------
// Navigation: clicking a breadcrumb segment
// ---------------------------------------------------------------------------

void BreadcrumbToolBar::segmentClicked(int index)
{
    // Clicking the last segment does nothing (already there)
    if (index >= _segments.size() - 1) {
        return;
    }

    // Clicking a parent segment exits the current edit mode
    auto* guiDoc = Application::Instance->activeDocument();
    if (guiDoc && guiDoc->getInEdit()) {
        guiDoc->resetEdit();
    }
}

#include "moc_BreadcrumbToolBar.cpp"