/*
*  Copyright 2021 Michail Vourlakos <mvourlakos@gmail.com>
*
*  This file is part of Latte-Dock
*
*  Latte-Dock is free software; you can redistribute it and/or
*  modify it under the terms of the GNU General Public License as
*  published by the Free Software Foundation; either version 2 of
*  the License, or (at your option) any later version.
*
*  Latte-Dock 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 General Public License for more details.
*
*  You should have received a copy of the GNU General Public License
*  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import QtQuick 2.7
import QtQuick.Layouts 1.1
import QtQuick.Window 2.2

import org.kde.plasma.plasmoid 2.0
import org.kde.plasma.components 2.0 as PlasmaComponents
import org.kde.plasma.core 2.0 as PlasmaCore

import org.kde.latte.abilities.definition 0.1 as AbilityDefinition

AbilityDefinition.ThinTooltip {
    id: _thinTooltip
    property Item debug: null

    readonly property int maxCharacters: 80

    property Item lastHidingVisualParent: null

    //! Public API
    readonly property Item publicApi: Item {
        readonly property alias isEnabled: _thinTooltip.isEnabled
        readonly property alias currentText: _thinTooltip.currentText
        readonly property alias currentVisualParent: _thinTooltip.currentVisualParent

        function show(visualParent, text) {
            _thinTooltip.show(visualParent, text);
        }

        function hide(visualParent) {
            _thinTooltip.hide(visualParent);
        }
    }

    //! Private Implementation

    onShowIsBlockedChanged: {       
        if (!showIsBlocked && !_tooltipDialog.visible && _thinTooltip.currentVisualParent) {
            _hideTimer.stop();
            _tooltipDialog.visible = true;
        } else if (showIsBlocked && _tooltipDialog.visible) {
            _tooltipDialog.visible = false;
        }
    }

    function show(visualParent, text) {
        if (!isEnabled) {
            _hideTimer.stop();
            _showTimer.stop();
            _tooltipDialog.visible = false;
            return;
        }

        if (!showIsBlocked) {
            _hideTimer.stop();
        }

        _thinTooltip.currentVisualParent = visualParent;
        _tooltipDialog.visualParent = visualParent;

        var fixedDisplayText = text.length>maxCharacters ? text.substring(0,maxCharacters-1) + "..." : text;
        _thinTooltip.currentText = fixedDisplayText;

        if (!_tooltipDialog.visible && !showIsBlocked) {
            _showTimer.start();
        }
    }

    function hide(visualParent) {
        if (_thinTooltip.currentVisualParent === visualParent) {
            _thinTooltip.lastHidingVisualParent = visualParent;
            _showTimer.stop();
            _hideTimer.start();
        }
    }

    //! Show Delayer Timer
    Timer {
        id: _showTimer
        interval: 100
        onTriggered: {
            if (_thinTooltip.currentVisualParent) {
                _tooltipDialog.visible = true;
            }

            if (debug && debug.timersEnabled) {
                console.log("ThinTooltip host timer: show() called...");
            }
        }
    }

    //! Hide Delayer Timer
    Timer {
        id: _hideTimer
        interval: 100
        onTriggered: {
            if (_thinTooltip.lastHidingVisualParent === _thinTooltip.currentVisualParent) {
                _tooltipDialog.visible = false;
                _thinTooltip.lastHidingVisualParent = null;
                _thinTooltip.currentVisualParent = null;
                _thinTooltip.currentText = "";
            }

            if (debug && debug.timersEnabled) {
                console.log("ThinTooltip host timer: hide() called...");
            }
        }
    }

    PlasmaCore.Dialog{
        id: _tooltipDialog
        type: PlasmaCore.Dialog.Tooltip
        flags: Qt.WindowStaysOnTopHint | Qt.WindowDoesNotAcceptFocus | Qt.ToolTip

        location: plasmoid.location
        mainItem: RowLayout{
            Layout.fillWidth: true
            Layout.fillHeight: true
            PlasmaComponents.Label{
                Layout.leftMargin: 4
                Layout.rightMargin: 4
                Layout.topMargin: 2
                Layout.bottomMargin: 2
                text: _thinTooltip.currentText
            }
        }

        visible: false
    }
}