// SPDX-License-Identifier: Unlicense

import QtQuick 2.12
import QtQuick.Controls 2.13
import QtQuick.Layouts 1.6

import 'util.js' as Util

ListView {
    id: control

    required property var tags // tag definitions
    property bool editing: false

    signal selected(var event)

    clip: true
    highlightMoveDuration: 0
    highlightResizeDuration: 0

    onCurrentIndexChanged: editing = false

    Keys.onPressed: {
        switch (event.key) {
        case Qt.Key_Home:
            currentIndex = 0
            break
        case Qt.Key_End:
            currentIndex = count - 1
            break
        case Qt.Key_Enter:
        case Qt.Key_Return:
            if (editing) {
                currentItem.store()
                editing = false
            } else {
                if (currentItem.fields.length > 0)
                    editing = true
            }
            break
        case Qt.Key_Escape:
            editing = false
            break
        case Qt.Key_Delete:
            editing = false
            model.remove(currentIndex)
            break
        default:
            return
        }
        event.accepted = true
    }

    ScrollBar.vertical: ScrollBar { anchors.right: parent.right }

    delegate: ItemDelegate {
        id: event

        required property var model
        required property int index
        required property int time
        required property string tag

        property alias fields: inputs.model // field definitions
        property bool editing: control.editing && ListView.isCurrentItem

        width: control.width
        highlighted: ListView.isCurrentItem

        clip: true
        padding: 2

        background: Rectangle {
            anchors.fill: parent
            color: highlighted ? Util.alphize(border.color, 0.1) :
                (index % 2 === 0 ? palette.base : palette.alternateBase)
            border {
                color: editing ? palette.highlight : palette.dark
                width: highlighted ? 1 : 0
            }
            radius: border.width
        }

        // Store current inputs in model.
        function store() {
            var values = {}
            for (var i = 0; i < inputs.model.length; i++)
                values[inputs.model[i].name] = inputs.items[i].value
            model.values = values
        }

        // Pass the key to parent first to check if Video handles it.
        // If not, try passing it to each field input when editing.
        Keys.forwardTo: Array.prototype.concat(control, editing ? inputs.items : [])

        onClicked: {
            control.currentIndex = index
            control.forceActiveFocus()
        }
        onDoubleClicked: control.selected(event)

        contentItem: ColumnLayout {
            anchors { left: parent.left; right: parent.right; margins: 5 }

            // Event time, tag and summary.
            RowLayout {
                Label {
                    text: new Date(model.time).toISOString().substr(12, 9)
                    font.pixelSize: 10
                    Layout.alignment: Qt.AlignBaseline
                }
                Label {
                    text: tag
                    font.weight: Font.DemiBold
                    Layout.alignment: Qt.AlignBaseline
                }
                Label {
                    text: {
                        var str = ''
                        for (var i = 0; i < inputs.count; i++) {
                            const field = inputs.model[i]
                            const value = model.values[field.name]
                            if (value && field.type !== 'TextArea')
                                str += (field.type === 'Bool' ? field.name : value) + ' '
                        }
                        return str
                    }
                    elide: Text.ElideRight
                    textFormat: Text.PlainText
                    Layout.fillWidth: true
                    Layout.alignment: Qt.AlignBaseline
                }
            }

            // Inputs for event‐specific fields.
            GridLayout {
                flow: GridLayout.TopToBottom
                rows: inputs.count

                columnSpacing: 10
                visible: editing

                // Labels.
                Repeater {
                    model: inputs.model
                    delegate: Label {
                        text: Util.addShortcut(modelData.name, modelData.key)
                        Layout.alignment: Qt.AlignRight
                    }
                }

                // Inputs.
                Repeater {
                    id: inputs

                    readonly property var items: Array.from({ length: count }, (_, i) => itemAt(i).item)

                    // If field definitions are missing for this event’s tag, use
                    // Text for all field types unless where the value is bool.
                    model: tags[tag] ? tags[tag].fields :
                        Object.entries(event.model.values).map(value => ({
                            'name': value[0],
                            'type': typeof(value[1]) === 'boolean' ? 'Bool' : 'Text',
                        }))

                    delegate: Loader {
                        source: 'qrc:/Fields/' + modelData.type + '.qml'

                        Layout.fillHeight: true
                        Layout.fillWidth: true

                        // Set input value to what is in the model each time the control is expanded.
                        onVisibleChanged: {
                            if (item && visible)
                                item.set(event.model.values[modelData.name])
                        }

                        Binding {
                            target: item; property: 'model'
                            value: modelData
                        }
                    }
                }
            }
        }
    }
}