import QtQuick 2.13
import QtQuick.Controls 2.13
import QtGraphicalEffects 1.12
import QtQuick.Dialogs 1.3
import QtQuick.Layouts 1.13
import "../../imports"
import "../../shared"

Popup {
    property var modelList
    property alias listView: listView
    property var getImageSource
    property var getImageComponent
    property var getText: function () {}
    property var onClicked: function () {}
    property int imageWidth: 22
    property int imageHeight: 22
    property string title
    property bool showSearchBox: false

    function openPopup(listParam) {
        modelList = listParam
        popup.open()
    }

    onOpened: {
        listView.currentIndex = 0
        if (showSearchBox) {
            searchBox.text = ""
            searchBox.textField.forceActiveFocus()
        }
    }

    id: popup
    padding: Style.current.smallPadding
    width: messageInput.width
    height: {
        let possibleHeight = listView.contentHeight + Style.current.smallPadding * 2
        if (popupTitle.visible) {
            possibleHeight += popupTitle.height + Style.current.smallPadding
        }
        if (searchBox.visible) {
            possibleHeight += searchBox.height + Style.current.smallPadding
        }

        return Math.min(400, possibleHeight)
    }
    x: messageInput.x
    y: -height
    background: Rectangle {
        id: bgRectangle
        visible: !!popup.title || (!!popup.modelList && popup.modelList.length > 0)
        color: Style.current.background
        border.width: 0
        radius: Style.current.radius
        layer.enabled: true
        layer.effect: DropShadow{
            width: bgRectangle.width
            height: bgRectangle.height
            x: bgRectangle.x
            y: bgRectangle.y + 10
            visible: bgRectangle.visible
            source: bgRectangle
            horizontalOffset: 0
            verticalOffset: 2
            radius: 10
            samples: 15
            color: "#22000000"
        }
    }

    StyledText {
        id: popupTitle
        visible: !!popup.title
        height: visible ? implicitHeight : 0
        text: popup.title
        font.pixelSize: 17
        anchors.top: parent.top
    }

    SearchBox {
        id: searchBox
        visible: showSearchBox
        height: visible ? implicitHeight : 0
        width: parent.width
        anchors.top: popupTitle.bottom
        anchors.topMargin: popupTitle.visible ? Style.current.smallPadding : 0

        function goToNextAvailableIndex(up) {
            do {
                if (!up && listView.currentIndex === listView.count - 1) {
                    listView.currentIndex = 0
                    return
                } else if (up && listView.currentIndex === 0) {
                    listView.currentIndex = listView.count - 1
                    return
                }

                if (up) {
                    listView.decrementCurrentIndex()
                } else {
                    listView.incrementCurrentIndex()
                }
            } while (!listView.currentItem.visible)
        }

        Keys.onReleased: function onKeyPress(event) {
            if (event.key === Qt.Key_Down) {
                searchBox.goToNextAvailableIndex(false)
            }
            if (event.key === Qt.Key_Up) {
                searchBox.goToNextAvailableIndex(true)
            }
            if (event.key === Qt.Key_Escape) {
                return popup.close()
            }
            if (event.key === Qt.Key_Enter || event.key === Qt.Key_Return) {
                return popup.onClicked(listView.currentIndex)
            }
            if (!listView.currentItem.visible) {
                goToNextAvailableIndex(false)
            }
        }
    }

    ListView {
        id: listView
        model: popup.modelList || []
        keyNavigationEnabled: true
        Layout.fillHeight: true
        width: parent.width
        anchors.top: searchBox.bottom
        anchors.topMargin: searchBox.visible ? Style.current.smallPadding : 0
        anchors.bottom: parent.bottom
        clip: true

        delegate: Rectangle {
            property string myText: {
                if (typeof modelData === "undefined") {
                    return popup.getText(model)
                }
                return popup.getText(modelData)
            }
            id: rectangle
            visible: searchBox.text === "" || myText.includes(searchBox.text)
            color: listView.currentIndex === index ? Style.current.backgroundHover : Style.current.transparent
            border.width: 0
            width: parent.width
            height: visible ? 42 : 0
            radius: Style.current.radius

            Loader {
                id: imageLoader
                active: !!popup.getImageComponent || !!popup.getImageSource
                width: popup.imageWidth
                height: popup.imageHeight
                anchors.verticalCenter: parent.verticalCenter
                anchors.left: parent.left
                anchors.leftMargin: Style.current.smallPadding
                sourceComponent: popup.getImageComponent ? customImageComponent : normalImageComponent
            }

            Component {
                id: customImageComponent
                Item {
                    id: imageComponentContainer
                    children: {
                        if (!popup.getImageComponent) {
                            return ""
                        }
                        if (typeof modelData === "undefined") {
                            return popup.getImageComponent(imageComponentContainer, model)
                        }
                        return popup.getImageComponent(imageComponentContainer, modelData)
                    }
                }
            }

            Component {
                id: normalImageComponent
                SVGImage {
                    visible: !!source
                    width: popup.imageWidth
                    height: popup.imageHeight
                    source: {
                        if (!popup.getImageSource) {
                            return ""
                        }
                        if (typeof modelData === "undefined") {
                            return popup.getImageSource(model)
                        }
                        return popup.getImageSource(modelData)
                    }
                }
            }

            StyledText {
                text: rectangle.myText
                color: Style.current.textColor
                anchors.verticalCenter: parent.verticalCenter
                anchors.left: imageLoader.right
                anchors.leftMargin: Style.current.smallPadding
                font.pixelSize: 15
            }

            MouseArea {
                cursorShape: Qt.PointingHandCursor
                anchors.fill: parent
                hoverEnabled: true
                onEntered: {
                    listView.currentIndex = index
                }
                onClicked: {
                    popup.onClicked(index)
                }
            }
        }
    }
}