import Quickshell
import Quickshell.Wayland
import Quickshell.Io
import Quickshell.Widgets
import QtQuick
import QtQuick.Layouts
import QtQuick.Controls
import "../Config"

PanelWindow {
    id: launcher
    anchors.top: true
    property var open: false
    property int selectedIndex: 0
    readonly property list<DesktopEntry> visibleEntries: Array.from(DesktopEntries.applications.values).sort((d1, d2) => d1.name.localeCompare(d2.name)).filter(application => application.name.toLowerCase().includes(search.text.toLowerCase()))
    
    function genHeight() {
        if (launcher.visibleEntries.length > Config.launcherVisibleEntries) {
            return ((search.height * (Config.launcherVisibleEntries + 1) + Config.launcherOuterPadding))
        }
        else {
            return (search.height * (launcher.visibleEntries.length + 1) + Config.launcherOuterPadding)
        }  
    }
    implicitHeight: open ? genHeight() : 0
    implicitWidth: HostSpecific.menuWidth
    
    color: "transparent"
    visible: open ? true : false

    Behavior on implicitHeight {
        NumberAnimation {
            duration: 80
            easing.type: Easing.InOutQuad
            easing.overshoot: 2
        }
    }
    
    WlrLayershell.layer: WlrLayer.Overlay
    WlrLayershell.keyboardFocus: WlrKeyboardFocus.OnDemand
    exclusionMode: ExclusionMode.Ignore

    Rectangle {
        id: rect
        anchors.fill: parent
        color: Colours.background
        opacity: 0.9

        bottomLeftRadius: 20
        bottomRightRadius: 20

        ColumnLayout {
            id: content
            anchors.fill: parent
            
            Row{
                Rectangle {
                    color: "transparent"
                    width: Config.launcherOuterPadding
                    height: search.height
                }
                Rectangle {
                    height: search.height
                    width: search.height
                    color: "transparent"

                    IconImage {
                        anchors.centerIn: parent
                        source: Quickshell.iconPath("search-icon")
                        height: search.height
                        width: search.height
                    }
                }
                Rectangle {
                    color: "transparent"
                    width: launcher.width - search.height - (2 * Config.launcherOuterPadding)
                    height: search.height
                    TextField {
                        id: search
                        
                        anchors.verticalCenter: parent.verticalCenter
                        anchors.left: parent.left

                        focus: true
                        placeholderText: "Search..."
                        background: null

                        color: Colours.foreground
                        placeholderTextColor: Colours.colour0
                        font.pixelSize: HostSpecific.menuFontSize
                        font.family: "Departure Mono"

                        Keys.onPressed: event => {
                            if (event.key == Qt.Key_Return) {
                                launcher.open = false;
                                launcher.visibleEntries[launcher.selectedIndex].execute();
                            }
                            if (event.key == Qt.Key_Down) {
                                if (list.currentIndex < (launcher.visibleEntries.length-1)) {
                                    list.currentIndex++;
                                }
                                event.accepted = true;
                            }
                            if (event.key == Qt.Key_Up) {
                                if (list.currentIndex > 0) {
                                    list.currentIndex--;
                                }
                                event.accepted = true;
                            }
                            if (event.key == Qt.Key_Escape) {
                                launcher.open = false;
                                event.accepted = true;
                            }
                        }
                    }
                }
                Rectangle {
                    color: "transparent"
                    width: Config.launcherOuterPadding
                    height: search.height
                }
            }

            ListView {
                id: list
                model: launcher.visibleEntries
                Layout.fillWidth: true
                Layout.fillHeight: true
                clip: true
                preferredHighlightBegin: 0

                highlight: Rectangle { color: Colours.colour1; radius:20 }
                currentIndex: 0

                delegate: Row {

                    Rectangle {
                        color: "transparent"
                        width: Config.launcherOuterPadding
                        height: search.height
                    }
                    
                    Rectangle {
                        color: "transparent"
                        height: search.height
                        width: search.height

                        IconImage {
                            source: Quickshell.iconPath(modelData.icon, true)
                            height:search.height
                            width: search.height
                        }
                    }

                    Rectangle {
                        color: "transparent"
                        height: search.height
                        width: launcher.width - search.height - Config.launcherOuterPadding

                        Text{
                            color: Colours.foreground
                            text: modelData.name
                            font.pixelSize: HostSpecific.menuFontSize
                            font.family: "Departure Mono"
                            anchors.verticalCenter: parent.verticalCenter
                        }
                    }
                }
            }
        }
    }

    IpcHandler {
        target: "launcher"

        function toggle() {
            search.text = ""
            launcher.open = !launcher.open
        }
    }
    
}