// 04-listview/listview.qml
// ListView: scrollable list with a ListModel (observable).
// Pure QML. Run with: qml6 listview.qml

import QtQuick
import QtQuick.Window
import QtQuick.Controls

Window {
    width: 360
    height: 400
    visible: true
    title: "QML 04: ListView"

    ListModel {
        id: tasks
        ListElement { title: "Ship the QML skill"; done: true }
        ListElement { title: "Validate with prototypes"; done: true }
        ListElement { title: "Add component examples"; done: false }
        ListElement { title: "Write reference docs"; done: false }
    }

    Column {
        anchors.fill: parent
        anchors.margins: 12
        spacing: 8

        // Header
        Row {
            spacing: 8
            Button {
                text: "Add"
                onClicked: tasks.append({ title: "New task " + (tasks.count + 1), done: false })
            }
            Button {
                text: "Clear done"
                onClicked: {
                    for (let i = tasks.count - 1; i >= 0; i--) {
                        if (tasks.get(i).done) tasks.remove(i)
                    }
                }
            }
        }

        // The list
        ListView {
            width: parent.width
            height: parent.height - y
            clip: true
            spacing: 4
            model: tasks

            delegate: Rectangle {
                required property var modelData
                required property int index
                width: ListView.view.width
                implicitHeight: 44
                radius: 4
                color: modelData.done ? "#e8f5e9" : "white"
                border.color: "#ccc"
                border.width: 1

                Row {
                    anchors.fill: parent
                    anchors.leftMargin: 12
                    anchors.rightMargin: 12
                    spacing: 8

                    CheckBox {
                        anchors.verticalCenter: parent.verticalCenter
                        checked: modelData.done
                        Accessible.name: "Completed: " + modelData.title
                        onToggled: tasks.setProperty(index, "done", checked)
                    }
                    Text {
                        anchors.verticalCenter: parent.verticalCenter
                        text: modelData.title
                        font.strikeout: modelData.done
                        color: modelData.done ? "#888" : "black"
                    }
                }

                // Click row to delete
                TapHandler {
                    acceptedButtons: Qt.RightButton
                    onTapped: tasks.remove(index)
                }
            }

            // Empty state
            Text {
                anchors.centerIn: parent
                visible: tasks.count === 0
                text: "No tasks. Click Add to start."
                color: "#999"
            }
        }
    }
}