/*
*  Copyright 2016  Smith AR <audoban@openmailbox.org>
*                  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 2.1
import QtQuick.Layouts 1.1
import QtGraphicalEffects 1.0

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

import org.kde.latte.core 0.2 as LatteCore
import org.kde.latte.components 1.0 as LatteComponents

import "../../code/MathTools.js" as MathTools

Item{
    id: wrapper
    width: root.isHorizontal ? length : thickness
    height: root.isHorizontal ? thickness : length

    readonly property int length: {
        if (appletItem.isInternalViewSplitter) {
            if (!root.inConfigureAppletsMode) {
                return 0;
            } else if (appletItem.inConfigureAppletsDragging){
                return appletMinimumLength + (lengthAppletPadding + metrics.margin.length)*2 ;
            }
        }

        if (isSeparator && appletItem.parabolic.isEnabled) {
            return -1;
        }

        if (appletItem.isAutoFillApplet) {
            //! dont miss 1pixel gap when the two internal splitters are met inConfigure and Justify mode
            //! a good example is a big vertical right sidebar to observe that gap
            if (appletItem.layouter.maxMetricsInHigherPriority) {
                return isInternalViewSplitter ? appletItem.maxAutoFillLength + 1 : appletItem.maxAutoFillLength;
            }

            var result = Math.max(appletItem.minAutoFillLength,Math.min(appletPreferredLength,appletItem.maxAutoFillLength));

            return isInternalViewSplitter? result + 1 : result;
        }

        return root.inConfigureAppletsMode ? Math.max(Math.min(appletItem.metrics.iconSize, root.minAppletLengthInConfigure), scaledLength) : scaledLength;
    }

    readonly property int thickness: {
        if (appletItem.isInternalViewSplitter && !root.inConfigureAppletsMode) {
            return 0;
        }

        return communicator.parabolicEffectIsSupported ? appletPreferredThickness : scaledThickness + appletItem.metrics.margin.screenEdge;
    }

    opacity: appletColorizer.mustBeShown && graphicsSystem.isAccelerated ? 0 : 1

    property bool disableLengthScale: false
    property bool disableThicknessScale: false

    property bool editMode: root.inConfigureAppletsMode

    property int appletWidth: applet ?  applet.width : -1
    property int appletHeight: applet ?  applet.height : -1

    property int appletMinimumWidth: applet && applet.Layout ?  applet.Layout.minimumWidth : -1
    property int appletMinimumHeight: applet && applet.Layout ? applet.Layout.minimumHeight : -1

    property int appletPreferredWidth: applet && applet.Layout ?  applet.Layout.preferredWidth : -1
    property int appletPreferredHeight: applet && applet.Layout ?  applet.Layout.preferredHeight : -1

    property int appletMaximumWidth: applet && applet.Layout ?  applet.Layout.maximumWidth : -1
    property int appletMaximumHeight: applet && applet.Layout ?  applet.Layout.maximumHeight : -1

    readonly property int appletLength: root.isHorizontal ? appletWidth : appletHeight
    readonly property int appletThickness: root.isHorizontal ? appletHeight : appletWidth

    readonly property int appletMinimumLength : {
        if (isInternalViewSplitter) {
            return Math.min(root.maxJustifySplitterSize, appletItem.metrics.iconSize);
        }

        return root.isHorizontal ? appletMinimumWidth : appletMinimumHeight
    }

    readonly property int appletPreferredLength: {
        if (isInternalViewSplitter) {
            return appletItem.isFillSplitter ? Infinity : -1;
        }
        return root.isHorizontal ? appletPreferredWidth : appletPreferredHeight;
    }

    readonly property int appletMaximumLength: {
        if (isInternalViewSplitter) {
            return isFillSplitter ? (root.isHorizontal ? root.width : root.height) : appletMinimumLength;
        }

        root.isHorizontal ? appletMaximumWidth : appletMaximumHeight;
    }

    readonly property int appletMinimumThickness: root.isHorizontal ? appletMinimumHeight : appletMinimumWidth
    readonly property int appletPreferredThickness: root.isHorizontal ? appletPreferredHeight : appletPreferredWidth
    readonly property int appletMaximumThickness: root.isHorizontal ? appletMaximumHeight : appletMaximumWidth

    property int iconSize: appletItem.metrics.iconSize

    property int marginsThickness: appletItem.canFillThickness ? 0 : appletItem.metrics.totals.thicknessEdges
    property int marginsLength: 0   //Fitt's Law, through Binding to avoid Binding loops

    property int localLengthMargins: isSeparator
                                     || !communicator.requires.lengthMarginsEnabled
                                     || isInternalViewSplitter
                                        ? 0 : appletItem.lengthAppletFullMargins

    property real scaledLength: zoomScaleLength * (layoutLength + marginsLength)
    property real scaledThickness: zoomScaleThickness * (layoutThickness + marginsThickness)
    property real zoomScaleLength: disableLengthScale ? 1 : zoomScale
    property real zoomScaleThickness: disableThicknessScale ? 1 : zoomScale

    property int layoutLength: 0
    property int layoutThickness: 0

    property real zoomScale: 1

    readonly property alias headThicknessMargin: _wrapperContainer.headThicknessMargin
    readonly property alias tailThicknessMargin: _wrapperContainer.tailThicknessMargin
    readonly property alias appletScreenMargin: _wrapperContainer.appliedEdgeMargin

    property int index: appletItem.index

    property Item wrapperContainer: _wrapperContainer
    property Item clickedEffect: _clickedEffect
    property Item containerForOverlayIcon: _containerForOverlayIcon
    property Item overlayIconLoader: _overlayIconLoader

    Behavior on opacity {
        NumberAnimation {
            duration: 0.8 * appletItem.animations.duration.proposed
            easing.type: Easing.OutCubic
        }
    }

    // property int pHeight: applet ? applet.Layout.preferredHeight : -10

    /*function debugLayouts(){
        if(applet && applet.pluginName==="org.kde.plasma.systemtray"){
            console.log("---------- "+ applet.pluginName +" ----------");
            console.log("MinW "+applet.Layout.minimumWidth);
            console.log("PW "+applet.Layout.preferredWidth);
            console.log("MaxW "+applet.Layout.maximumWidth);
            console.log("FillW "+applet.Layout.fillWidth);
            console.log("-----");
            console.log("MinH "+applet.Layout.minimumHeight);
            console.log("PH "+applet.Layout.preferredHeight);
            console.log("MaxH "+applet.Layout.maximumHeight);
            console.log("FillH "+applet.Layout.fillHeight);
            console.log("-----");
            console.log("Real Applet Width: "+applet.width);
            console.log("Real Applet Height: "+applet.height);
            console.log("-----");
            console.log("Real Wrapper Width: "+wrapper.width);
            console.log("Real Wrapper Height: "+wrapper.height);
            console.log("-----");
            console.log("Can be hovered: " + parabolicEffectIsSupported);
            console.log("Icon size: " + appletItem.metrics.iconSize);
            console.log("Thick Margins: " + appletItem.metrics.totals.thicknessEdges);
            console.log("Intern. Margins: " + (appletItem.metrics.padding.length * 2));
            console.log("Intern. Margins: " + (appletItem.metrics.margin.length * 2));
            console.log("Max hovered criteria: " + (appletItem.metrics.iconSize + metrics.totals.thicknessEdges));
            console.log("-----");
            console.log("LayoutLength: " + layoutLength);
            console.log("LayoutThickness: " + layoutThickness);
        }
    }*/

    onAppletLengthChanged: {
        if(zoomScale === 1) {
            appletItem.updateParabolicEffectIsSupported();
        }
    }

    onAppletThicknessChanged: {
        if(zoomScale === 1) {
            appletItem.updateParabolicEffectIsSupported();
        }
    }

    onAppletMinimumLengthChanged: {
        if(zoomScale === 1) {
            appletItem.updateParabolicEffectIsSupported();
        }

        updateAutoFillLength();
    }

    onAppletMinimumThicknessChanged: {
        if(zoomScale === 1) {
            appletItem.updateParabolicEffectIsSupported();
        }
    }

    onAppletPreferredLengthChanged: {
        updateAutoFillLength();
    }

    onAppletMaximumLengthChanged: {
        updateAutoFillLength();
    }

    onZoomScaleChanged: {
        if ((zoomScale === appletItem.parabolic.factor.zoom) && !appletItem.parabolic.directRenderingEnabled) {
            appletItem.parabolic.setDirectRenderingEnabled(true);
        }

        if ((zoomScale > 1) && !appletItem.isZoomed) {
            appletItem.isZoomed = true;
            appletItem.animations.needBothAxis.addEvent(appletItem);
        } else if (zoomScale == 1) {
            appletItem.isZoomed = false;
            appletItem.animations.needBothAxis.removeEvent(appletItem);
        }
    }

    Binding {
        target: wrapper
        property: "layoutThickness"
        when: latteView && (wrapper.zoomScale === 1 || communicator.parabolicEffectIsSupported)
        value: {
            if (appletItem.isInternalViewSplitter){
                return !root.inConfigureAppletsMode ? 0 : appletItem.metrics.iconSize;
            }

            // avoid binding loops on startup
            if (communicator.parabolicEffectIsSupported && !communicator.inStartup) {
                return appletPreferredThickness;
            }

            return appletItem.metrics.iconSize;
        }
    }

    Binding {
        target: wrapper
        property: "layoutLength"
        when: latteView && !appletItem.isAutoFillApplet && (wrapper.zoomScale === 1)
        value: {
            if (applet && ( appletMaximumLength < appletItem.metrics.iconSize
                                  || appletPreferredLength > appletItem.metrics.iconSize
                                  || appletItem.originalAppletBehavior)) {

                //this way improves performance, probably because during animation the preferred sizes update a lot
                if (appletMaximumLength>0 && appletMaximumLength < appletItem.metrics.iconSize){
                    return appletMaximumLength;
                } else if (appletMinimumLength > appletItem.metrics.iconSize){
                    return appletMinimumLength;
                } else if ((appletPreferredLength > appletItem.metrics.iconSize)
                           || (appletItem.originalAppletBehavior && appletPreferredLength > 0)){
                    return appletPreferredLength;
                }
            }

            return appletItem.metrics.iconSize;
        }
    }

    Binding {
        target: wrapper
        property: "disableLengthScale"
        when: latteView && !(appletItem.isAutoFillApplet || appletItem.isLattePlasmoid)
        value: {
            var blockParabolicEffectInLength = false;

            if (communicator.parabolicEffectIsSupported) {
                return true;
            }

            if (appletItem.isInternalViewSplitter){
                return false;
            } else {
                if(applet && (appletMinimumLength > appletItem.metrics.iconSize) && !appletItem.parabolicEffectIsSupported){
                    return (wrapper.zoomScale === 1);
                } //it is used for plasmoids that need to scale only one axis... e.g. the Weather Plasmoid
                else if(applet
                        && ( appletMaximumLength < appletItem.metrics.iconSize
                            || appletPreferredLength > appletItem.metrics.iconSize
                            || appletItem.originalAppletBehavior)) {

                    //this way improves performance, probably because during animation the preferred sizes update a lot
                    if (appletMaximumLength>0 && appletMaximumLength < appletItem.metrics.iconSize){
                        return false;
                    } else if (appletMinimumLength > appletItem.metrics.iconSize){
                        return (wrapper.zoomScale === 1);
                    } else if ((appletPreferredLength > appletItem.metrics.iconSize)
                               || (appletItem.originalAppletBehavior && appletPreferredLength > 0 )){
                        return (wrapper.zoomScale === 1);
                    }
                }
            }

            return false;
        }
    }

    Binding {
        target: wrapper
        property: "marginsLength"
        when: latteView && (!root.inStartup || visibilityManager.inRelocationHiding)
        value: localLengthMargins
    }

    function updateAutoFillLength() {
        if (appletItem.isAutoFillApplet) {
            appletItem.layouter.updateSizeForAppletsInFill();
        }
    }

    //! Applet Main Container
    Item{
        id:_wrapperContainer
        width: root.isHorizontal ? _length : _thickness
        height: root.isHorizontal ? _thickness : _length
        opacity: appletShadow.active ? 0 : 1

        property int _length:0 // through Binding to avoid binding loops
        property int _thickness:0 // through Binding to avoid binding loops

        readonly property int appliedEdgeMargin: appletItem.screenEdgeMarginSupported ? 0 : appletItem.metrics.margin.screenEdge
        readonly property int tailThicknessMargin: appletItem.screenEdgeMarginSupported ? 0 : appliedEdgeMargin + (wrapper.zoomScaleThickness * metrics.margin.thickness)
        readonly property int headThicknessMargin: appletItem.canFillThickness || appletItem.screenEdgeMarginSupported ? 0 : appletItem.metrics.margin.thickness

        Binding {
            target: _wrapperContainer
            property: "_thickness"
            when: !visibilityManager.inRelocationHiding
            value: {
                if (appletItem.isInternalViewSplitter) {
                    return wrapper.layoutThickness;
                }

                var wrapperContainerThickness =  appletItem.screenEdgeMarginSupported ? appletItem.metrics.totals.thickness : wrapper.zoomScaleThickness * metrics.iconSize;
                return appletItem.screenEdgeMarginSupported ? wrapperContainerThickness + appletItem.metrics.margin.screenEdge : wrapperContainerThickness;
            }
        }

        Binding {
            target: _wrapperContainer
            property: "_length"
            when: !visibilityManager.inRelocationHiding
            value: {
                if (appletItem.isAutoFillApplet && (appletItem.maxAutoFillLength>-1)){
                    return wrapper.length - appletItem.lengthAppletFullMargins;
                }

                return wrapper.zoomScaleLength * wrapper.layoutLength;
            }
        }

        Loader{
            anchors.fill: parent
            active: appletItem.debug.graphicsEnabled
            sourceComponent: Rectangle{
                width: 30
                height: 30
                color: "transparent"
                border.width: 1
                border.color: "yellow"
            }
        }

        Item{
            id: _containerForOverlayIcon
            anchors.fill: parent
        }

        Loader{
            id: _overlayIconLoader
            anchors.fill: parent
            active: communicator.appletMainIconIsFound

            property color backgroundColor: "black"
            property color glowColor: "white"

            sourceComponent: LatteCore.IconItem{
                id: overlayIconItem
                anchors.fill: parent
                visible: false

                source: {
                    if (communicator.appletIconItem && communicator.appletIconItem.visible) {
                        return communicator.appletIconItem.source;
                    } else if (communicator.appletImageItem && communicator.appletImageItem.visible) {
                        return communicator.appletImageItem.source;
                    }

                    return "";
                }

                providesColors: indicators.info.needsIconColors && source != ""
                usesPlasmaTheme: communicator.appletIconItem && communicator.appletIconItem.visible ? communicator.appletIconItem.usesPlasmaTheme : false

                Binding{
                    target: _overlayIconLoader
                    property: "backgroundColor"
                    when: overlayIconItem.providesColors
                    value: overlayIconItem.backgroundColor
                }

                Binding{
                    target: _overlayIconLoader
                    property: "glowColor"
                    when: overlayIconItem.providesColors
                    value: overlayIconItem.glowColor
                }

                Loader{
                    anchors.centerIn: parent
                    active: appletItem.debug.overloadedIconsEnabled
                    sourceComponent: Rectangle{
                        width: 30
                        height: 30
                        color: "green"
                        opacity: 0.65
                    }
                }
            }
        }

        //! WrapperContainer States
        states:[
            State{
                name: "bottom"
                when: plasmoid.location === PlasmaCore.Types.BottomEdge

                AnchorChanges{
                    target: _wrapperContainer;
                    anchors.horizontalCenter: parent.horizontalCenter; anchors.verticalCenter: undefined;
                    anchors.right: undefined; anchors.left: undefined; anchors.top: undefined; anchors.bottom: parent.bottom;
                }
                PropertyChanges{
                    target: _wrapperContainer;
                    anchors.leftMargin: 0;    anchors.rightMargin: 0;     anchors.topMargin:0;    anchors.bottomMargin: _wrapperContainer.tailThicknessMargin
                    anchors.horizontalCenterOffset: 0; anchors.verticalCenterOffset: 0;
                }
            },
            State{
                name: "top"
                when: plasmoid.location === PlasmaCore.Types.TopEdge

                AnchorChanges{
                    target:_wrapperContainer;
                    anchors.horizontalCenter: parent.horizontalCenter; anchors.verticalCenter: undefined;
                    anchors.right: undefined; anchors.left: undefined; anchors.top: parent.top; anchors.bottom: undefined;
                }
                PropertyChanges{
                    target: _wrapperContainer;
                    anchors.leftMargin: 0;    anchors.rightMargin: 0;     anchors.topMargin: _wrapperContainer.tailThicknessMargin;    anchors.bottomMargin: 0;
                    anchors.horizontalCenterOffset: 0; anchors.verticalCenterOffset: 0;
                }
            },
            State{
                name: "left"
                when: plasmoid.location === PlasmaCore.Types.LeftEdge

                AnchorChanges{
                    target: _wrapperContainer;
                    anchors.horizontalCenter: undefined; anchors.verticalCenter: parent.verticalCenter;
                    anchors.right: undefined; anchors.left: parent.left; anchors.top: undefined; anchors.bottom: undefined;
                }
                PropertyChanges{
                    target: _wrapperContainer;
                    anchors.leftMargin: _wrapperContainer.tailThicknessMargin;    anchors.rightMargin: 0;     anchors.topMargin:0;    anchors.bottomMargin: 0;
                    anchors.horizontalCenterOffset: 0; anchors.verticalCenterOffset: 0;
                }
            },
            State{
                name: "right"
                when: plasmoid.location === PlasmaCore.Types.RightEdge

                AnchorChanges{
                    target: _wrapperContainer;
                    anchors.horizontalCenter: undefined; anchors.verticalCenter: parent.verticalCenter;
                    anchors.right: parent.right; anchors.left: undefined; anchors.top: undefined; anchors.bottom: undefined;
                }
                PropertyChanges{
                    target: _wrapperContainer;
                    anchors.leftMargin: 0;    anchors.rightMargin: _wrapperContainer.tailThicknessMargin;     anchors.topMargin:0;    anchors.bottomMargin: 0;
                    anchors.horizontalCenterOffset: 0; anchors.verticalCenterOffset: 0;
                }
            }
        ]
    }

    //! EventsSink

    Loader {
        id: eventsSinkLoader
        anchors.fill: _wrapperContainer
        active: !communicator.parabolicEffectIsSupported && !isSeparator && !isSpacer
        //! The following can be added in case EventsSink creates slaginess with parabolic effect
        //!(appletItem.lockZoom || !appletItem.parabolic.isEnabled || !appletItem.parabolicEffectIsSupported)

        sourceComponent: EventsSink {
            destination: _wrapperContainer
        }
    }

    //! InternalViewSplitter
    Loader{
        anchors.fill: parent //_wrapperContainer
        anchors.topMargin: plasmoid.location === PlasmaCore.Types.TopEdge ? wrapper.appletScreenMargin : 0
        anchors.leftMargin: plasmoid.location === PlasmaCore.Types.LeftEdge ? wrapper.appletScreenMargin : 0
        anchors.bottomMargin: plasmoid.location === PlasmaCore.Types.BottomEdge ? wrapper.appletScreenMargin : 0
        anchors.rightMargin: plasmoid.location === PlasmaCore.Types.RightEdge ? wrapper.appletScreenMargin : 0

        active: appletItem.isInternalViewSplitter && root.inConfigureAppletsMode

        sourceComponent: LatteComponents.SpriteRectangle {
            isHorizontal: root.isHorizontal
            color: appletItem.highlightColor
            spriteSize: 6
        }
    }

    ///Shadow in applets
    Loader{
        id: appletShadow
        anchors.fill: appletItem.appletWrapper

        active: appletItem.applet
                && graphicsSystem.isAccelerated
                && !appletColorizer.mustBeShown
                && (root.enableShadows && applet.pluginName !== root.plasmoidName)

        onActiveChanged: {
            if (active && !isSeparator && graphicsSystem.isAccelerated) {
                wrapperContainer.opacity = 0;
            } else {
                wrapperContainer.opacity = 1;
            }
        }

        opacity: isSeparator ? 0.4 : 1

        sourceComponent: DropShadow{
            anchors.fill: parent
            color: root.appShadowColor //"#ff080808"
            fast: true
            samples: 2 * radius
            source: appletItem.applet
            radius: shadowSize
            verticalOffset: root.forceTransparentPanel || root.forcePanelForBusyBackground ? 0 : 2

            property int shadowSize : root.appShadowSize
        }
    }

    BrightnessContrast {
        id: _clickedEffect
        anchors.fill: _wrapperContainer
        source: _wrapperContainer

        visible: clickedAnimation.running && !indicators.info.providesClickedAnimation
    }

    /*   onHeightChanged: {
        if ((index == 1)|| (index==3)){
            console.log("H: "+index+" ("+zoomScale+"). "+currentLayout.children[1].height+" - "+currentLayout.children[3].height+" - "+(currentLayout.children[1].height+currentLayout.children[3].height));
        }
    }

    onZoomScaleChanged:{
        if ((index == 1)|| (index==3)){
            console.log(index+" ("+zoomScale+"). "+currentLayout.children[1].height+" - "+currentLayout.children[3].height+" - "+(currentLayout.children[1].height+currentLayout.children[3].height));
        }
    }*/

    Loader{
        anchors.fill: parent
        active: appletItem.debug.graphicsEnabled

        sourceComponent: Rectangle{
            anchors.fill: parent
            color: "transparent"
            //! red visualizer, in debug mode for the applets that use fillWidth or fillHeight
            //! green, for the rest
            border.color:  (appletItem.isAutoFillApplet && (appletItem.maxAutoFillLength>-1) && root.isHorizontal) ? "red" : "green"
            border.width: 1
        }
    }

    Behavior on zoomScale {
        id: animatedScaleBehavior
        enabled: !appletItem.parabolic.directRenderingEnabled || restoreAnimation.running
        NumberAnimation {
            duration: 3 * appletItem.animationTime
            easing.type: Easing.OutCubic
        }
    }

    Behavior on zoomScale {
        enabled: !animatedScaleBehavior.enabled
        NumberAnimation { duration: 0 }
    }
}// Main task area // id:wrapper