/*****************************************************************************
 * Copyright (C) 2021 VLC authors and VideoLAN
 *
 * This program 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.
 *
 * This program 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

import QtQuick
import QtQuick.Window

import VLC.MainInterface

Item {
    id: root

    property int csdSize: MainCtx.csdBorderSize
    required property Item target
    property bool anchorInside: true

    //private
    readonly property int _targetHeight: target?.height ?? 0
    readonly property int _targetWidth: target?.width ?? 0

    readonly property int _edgeVtHeight: target ? (target.height - root.csdSize * 2) : 0
    readonly property int _edgeHzWidth:  target ? (target.width  - root.csdSize * 2) : 0

    //areas placed inside the target
    readonly property var _innerModel: [
        //Edges
        {
            edge: Qt.TopEdge,
            x: root.csdSize,
            y: 0,
            width: root._edgeHzWidth,
            height: root.csdSize,
            cursor: Qt.SizeVerCursor,
        },
        {
            edge: Qt.LeftEdge,
            x: 0,
            y: root.csdSize,
            width: root.csdSize,
            height: root._edgeVtHeight,
            cursor: Qt.SizeHorCursor,
        },
        {
            edge: Qt.RightEdge,
            x: _targetWidth - root.csdSize,
            y: root.csdSize,
            width: root.csdSize,
            height: root._edgeVtHeight,
            cursor: Qt.SizeHorCursor,
        },
        {
            edge: Qt.BottomEdge,
            x: root.csdSize,
            y: _targetHeight - root.csdSize,
            width: root._edgeHzWidth,
            height: root.csdSize,
            cursor: Qt.SizeVerCursor,
        },
        //Corners
        {
            edge: Qt.TopEdge | Qt.LeftEdge,
            x: 0,
            y: 0,
            width: root.csdSize,
            height: root.csdSize,
            cursor: Qt.SizeFDiagCursor,
        },
        {
            edge: Qt.BottomEdge | Qt.LeftEdge,
            x: 0,
            y: _targetHeight - root.csdSize,
            width: root.csdSize,
            height: root.csdSize,
            cursor: Qt.SizeBDiagCursor,
        },
        {
            edge: Qt.TopEdge | Qt.RightEdge,
            x: _targetWidth - root.csdSize,
            y: 0,
            width: root.csdSize,
            height: root.csdSize,
            cursor: Qt.SizeBDiagCursor,
        },
        {
            edge: Qt.BottomEdge | Qt.RightEdge,
            x: _targetWidth - root.csdSize,
            y: _targetHeight - root.csdSize,
            width: root.csdSize,
            height: root.csdSize,
            cursor: Qt.SizeFDiagCursor,
        },
    ]

    //areas placed ouside the target
    readonly property var _outterModel: [
        //Edges
        {
            edge: Qt.TopEdge,
            x: 0,
            y: -root.csdSize,
            width: _targetWidth,
            height: root.csdSize,
            cursor: Qt.SizeVerCursor,
        },
        {
            edge: Qt.LeftEdge,
            x: -root.csdSize,
            y: 0,
            width: root.csdSize,
            height: _targetHeight,
            cursor: Qt.SizeHorCursor,
        },
        {
            edge: Qt.RightEdge,
            x: _targetWidth,
            y: 0,
            width: root.csdSize,
            height: _targetHeight,
            cursor: Qt.SizeHorCursor,
        },
        {
            edge: Qt.BottomEdge,
            x: 0,
            y: _targetHeight,
            width: _targetWidth,
            height: root.csdSize,
            cursor: Qt.SizeVerCursor,
        },
        //Corners
        {
            edge: Qt.TopEdge | Qt.LeftEdge,
            x: -root.csdSize,
            y: -root.csdSize,
            width: root.csdSize,
            height: root.csdSize,
            cursor: Qt.SizeFDiagCursor,
        },
        {
            edge: Qt.BottomEdge | Qt.LeftEdge,
            x: -root.csdSize,
            y: _targetHeight,
            width: root.csdSize,
            height: root.csdSize,
            cursor: Qt.SizeBDiagCursor,
        },
        {
            edge: Qt.TopEdge | Qt.RightEdge,
            x: _targetWidth,
            y: -root.csdSize,
            width: root.csdSize,
            height: root.csdSize,
            cursor: Qt.SizeBDiagCursor,
        },
        {
            edge: Qt.BottomEdge | Qt.RightEdge,
            x: _targetWidth,
            y: _targetHeight,
            width: root.csdSize,
            height: root.csdSize,
            cursor: Qt.SizeFDiagCursor,
        },
    ]

    Repeater {
        model: {
            if (!target)
                return 0
            else if (anchorInside)
                return _innerModel
            else
                return _outterModel
        }

        delegate: MouseArea {

            required property var modelData

            x: modelData.x
            y: modelData.y

            width: modelData.width
            height: modelData.height

            hoverEnabled: true
            cursorShape: modelData.cursor
            acceptedButtons: Qt.LeftButton

            onPressed: MainCtx.intfMainWindow.startSystemResize(modelData.edge)
        }
    }
}