import QtQuick

Item {
    id: root

    property NotificationTheme theme
    property var groupData: null
    property bool expanded: false
    property bool peekEnabled: false

    signal closeFinished(int notificationId, string reason)
    signal expandRequested(string groupKey, bool expanded)

    readonly property var entries: groupData && groupData.notifications ? groupData.notifications : []
    readonly property int entryCount: entries.length
    readonly property bool showCompressedStack: !expanded && entryCount > 1
    readonly property int visiblePeekCount: showCompressedStack && peekEnabled ? Math.min(theme ? theme.stackPeekCount : 2, Math.max(0, entryCount - 1)) : 0

    width: theme ? theme.stackWidth : 420
    implicitHeight: {
        if (expanded)
            return expandedColumn.implicitHeight;

        const base = newestCard.implicitHeight;
        const step = theme ? theme.stackPeekStep : 18;
        return base + visiblePeekCount * step;
    }
    height: implicitHeight

    Item {
        id: compressedStack
        visible: !root.expanded
        width: parent.width
        height: parent.height

        Repeater {
            model: root.visiblePeekCount

            NotificationCard {
                property int peekIndex: index

                theme: root.theme
                notificationId: root.entries[peekIndex + 1].notificationId
                notifObject: root.entries[peekIndex + 1].notifObject
                notifVersion: root.entries[peekIndex + 1].notifVersion
                createdAtMs: root.entries[peekIndex + 1].createdAt
                peekMode: true
                interactive: false
                width: root.width
                y: Math.max(0, newestCard.implicitHeight - (theme ? theme.stackPeekHeight : 36) + (theme ? theme.stackPeekStep : 18) * (peekIndex + 1))
                z: 10 - peekIndex

                onCloseFinished: function (closedNotificationId, reason) {
                    root.closeFinished(closedNotificationId, reason);
                }
            }
        }

        NotificationCard {
            id: newestCard
            theme: root.theme
            notificationId: root.entryCount > 0 ? root.entries[0].notificationId : -1
            notifObject: root.entryCount > 0 ? root.entries[0].notifObject : null
            notifVersion: root.entryCount > 0 ? root.entries[0].notifVersion : 0
            createdAtMs: root.entryCount > 0 ? root.entries[0].createdAt : Date.now()
            interactive: root.entryCount <= 1
            width: root.width
            y: 0
            z: 20

            onCloseFinished: function (closedNotificationId, reason) {
                root.closeFinished(closedNotificationId, reason);
            }
        }

        Rectangle {
            visible: root.entryCount > 1 && root.peekEnabled
            width: 82
            height: 18
            x: root.width - width - 18
            y: newestCard.implicitHeight + 1
            color: theme ? theme.panelBackground : "#000000"
            border.width: 2
            border.color: theme ? theme.panelBorder : "#ffffff"
            radius: 0
            antialiasing: false
            z: 25

            Text {
                anchors.centerIn: parent
                text: "+" + String(Math.max(0, root.entryCount - 1))
                color: theme ? theme.panelText : "#ffffff"
                font.family: theme ? theme.fontFamily : "8bitoperator JVE"
                font.pixelSize: 14
                font.letterSpacing: theme ? theme.fontLetterSpacing : 1
                renderType: Text.NativeRendering
                font.hintingPreference: Font.PreferNoHinting
                smooth: false
                antialiasing: false
            }
        }

        TapHandler {
            enabled: root.entryCount > 1
            acceptedButtons: Qt.LeftButton
            onTapped: root.expandRequested(root.groupData.groupKey, true)
        }

        TapHandler {
            enabled: root.entryCount > 1
            acceptedButtons: Qt.RightButton
            onTapped: {
                if (root.entryCount > 0)
                    root.closeFinished(root.entries[0].notificationId, "dismiss");
            }
        }
    }

    Column {
        id: expandedColumn
        visible: root.expanded
        width: parent.width
        spacing: 0

        Repeater {
            model: root.entries

            NotificationCard {
                theme: root.theme
                notificationId: modelData.notificationId
                notifObject: modelData.notifObject
                notifVersion: modelData.notifVersion
                createdAtMs: modelData.createdAt
                width: root.width
                forceExpanded: true

                onCloseFinished: function (closedNotificationId, reason) {
                    root.closeFinished(closedNotificationId, reason);
                }
            }
        }

        Rectangle {
            visible: root.entryCount > 1
            width: parent.width
            height: theme ? theme.actionHeight : 34
            color: theme ? theme.panelBackground : "#000000"
            border.width: theme ? theme.actionBorderWidth : 2
            border.color: theme ? theme.panelBorder : "#ffffff"
            radius: 0
            antialiasing: false

            Text {
                anchors.centerIn: parent
                text: "Collapse"
                color: theme ? theme.panelText : "#ffffff"
                font.family: theme ? theme.fontFamily : "8bitoperator JVE"
                font.pixelSize: 18
                font.letterSpacing: theme ? theme.fontLetterSpacing : 1
                renderType: Text.NativeRendering
                font.hintingPreference: Font.PreferNoHinting
                smooth: false
                antialiasing: false
            }

            TapHandler {
                acceptedButtons: Qt.LeftButton
                onTapped: root.expandRequested(root.groupData.groupKey, false)
            }
        }
    }

    Behavior on implicitHeight {
        NumberAnimation {
            duration: theme ? theme.expandMs : 120
            easing.type: Easing.InOutCubic
        }
    }
}