/*
    Copyright (C) 2011 Jocelyn Turcotte <turcotte.j@gmail.com>

    This program 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 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this program; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

import QtQuick 2.13
import QtQuick.Controls 2.13
import QtGraphicalEffects 1.13
import "../../../../imports"
import "../../../../shared"
import "../../../../shared/status"

Rectangle {
    id: container

    property QtObject model: undefined
    property Item delegate
    property alias suggestionsModel: filterItem.model
    property alias filter: filterItem.filter
    property alias property: filterItem.property
    property int cursorPosition
    signal itemSelected(var item, int lastAtPosition, int lastCursorPosition)
    property alias listView: listView
    property bool shouldHide: false

    onCursorPositionChanged: {
        if (shouldHide) {
            shouldHide = false
        }
    }

    function hide() {
        shouldHide = true
    }

    function selectCurrentItem() {
        container.itemSelected(listView.model.get(listView.currentIndex), filterItem.lastAtPosition, filterItem.cursorPosition)
    }

    onVisibleChanged: {
        if (visible && listView.currentIndex === -1) {
            // If the previous selection was made using the mouse, the currentIndex was changed to -1
            // We change it back to 0 so that it can be used to select using the keyboard
            listView.currentIndex = 0
        }
    }

    z: parent.z + 100
    visible: !shouldHide && filter.length > 0 && suggestionsModel.count > 0
    height: Math.min(400, listView.contentHeight + Style.current.smallPadding)

    opacity: visible ? 1.0 : 0
    Behavior on opacity {
        NumberAnimation { }
    }

    color: Style.current.background
    radius: Style.current.radius
    border.width: 0
    layer.enabled: true
    layer.effect: DropShadow{
        width: container.width
        height: container.height
        x: container.x
        y: container.y + 10
        visible: container.visible
        source: container
        horizontalOffset: 0
        verticalOffset: 2
        radius: 10
        samples: 15
        color: "#22000000"
    }

    SuggestionFilter {
        id: filterItem
        sourceModel: container.model
        cursorPosition: container.cursorPosition
    }


    ListView {
        id: listView
        model: container.suggestionsModel
        keyNavigationEnabled: true
        anchors.fill: parent
        anchors.topMargin: Style.current.halfPadding
        anchors.leftMargin: Style.current.halfPadding
        anchors.rightMargin: Style.current.halfPadding
        anchors.bottomMargin: Style.current.halfPadding
        clip: true

        property int selectedIndex
        property var selectedItem: selectedIndex == -1 ? null : model[selectedIndex]
        signal suggestionClicked(var item)

        delegate: Rectangle {
            id: rectangle
            color: listView.currentIndex === index ? Style.current.backgroundHover : Style.current.transparent
            border.width: 0
            width: parent.width
            height: 42
            radius: Style.current.radius

            StatusImageIdenticon {
                id: accountImage
                anchors.verticalCenter: parent.verticalCenter
                anchors.left: parent.left
                anchors.leftMargin: Style.current.smallPadding
                source: model.identicon
            }

            StyledText {
                text: model[container.property.split(",").map(p => p.trim()).find(p => !!model[p])]
                color: Style.current.textColor
                anchors.verticalCenter: parent.verticalCenter
                anchors.left: accountImage.right
                anchors.leftMargin: Style.current.smallPadding
                font.pixelSize: 15
            }

            MouseArea {
                cursorShape: Qt.PointingHandCursor
                anchors.fill: parent
                hoverEnabled: true
                onEntered: {
                    listView.currentIndex = index
                }
                onClicked: {
                    container.itemSelected(model, filterItem.lastAtPosition, filterItem.cursorPosition)
                }
            }
        }
    }
}