// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

import QtQuick
import QtQuick.Templates as T
import QtQuick.Controls.impl
import QtQuick.Controls.iOS.impl

T.TreeViewDelegate {
    id: control

    implicitWidth: leftMargin + __contentIndent + implicitContentWidth + rightPadding + rightMargin
    implicitHeight: Math.max(implicitBackgroundHeight, implicitContentHeight, implicitIndicatorHeight)

    indentation: indicator ? indicator.width : 12
    leftMargin: 16
    rightMargin: 16
    spacing: 14

    topPadding: contentItem ? (height - contentItem.implicitHeight) / 2 : 0
    leftPadding: !mirrored ? leftMargin + __contentIndent : width - leftMargin - __contentIndent - implicitContentWidth

    highlighted: control.selected || control.current
               || ((control.treeView.selectionBehavior === TableView.SelectRows
               || control.treeView.selectionBehavior === TableView.SelectionDisabled)
               && control.row === control.treeView.currentRow)

    required property int row
    required property var model
    readonly property real __contentIndent: !isTreeNode ? 0 : (depth * indentation) + (indicator ? indicator.width + spacing : 0)

    indicator: Item {
        readonly property real __indicatorIndent: control.leftMargin + (control.depth * control.indentation)
        x: !control.mirrored ? __indicatorIndent : control.width - __indicatorIndent - width
        y: (control.height - height) / 2
        implicitWidth: Math.max(arrow.implicitWidth, 20)
        implicitHeight: background.height

        property Image arrow : Image {
            parent: control.indicator
            x: (parent.width - width) / 2
            y: (parent.height - height) / 2
            rotation:  control.expanded ? 90 : (control.mirrored ? 180 : 0)
            opacity: control.enabled ? 1 : 0.5

            source: IOS.url + "arrow-indicator"
            ImageSelector on source {
                states: [
                    {"light": Application.styleHints.colorScheme === Qt.Light},
                    {"dark": Application.styleHints.colorScheme === Qt.Dark}
                ]
            }
        }
    }

    background: Rectangle {
        implicitHeight: 44
        color: Application.styleHints.colorScheme === Qt.Dark ? control.palette.dark : control.palette.base
        NinePatchImage {
            height: parent.height
            width: parent.width
            source: IOS.url + (control.highlighted ? "itemdelegate-background-pressed" : "itemdelegate-background")
            NinePatchImageSelector on source {
                states: [
                    {"light": Application.styleHints.colorScheme === Qt.Light},
                    {"dark": Application.styleHints.colorScheme === Qt.Dark}
                ]
            }
        }
    }

    contentItem: Label {
        clip: false
        text: control.model.display
        elide: Text.ElideRight
        visible: !control.editing
    }

    // The edit delegate is a separate component, and doesn't need
    // to follow the same strict rules that are applied to a control.
    // qmllint disable attached-property-reuse
    // qmllint disable controls-sanity
    TableView.editDelegate: FocusScope {
        width: parent.width
        height: parent.height

        readonly property int __role: {
            let model = control.treeView.model
            let index = control.treeView.index(row, column)
            let editText = model.data(index, Qt.EditRole)
            return editText !== undefined ? Qt.EditRole : Qt.DisplayRole
        }

        TextField {
            id: textField
            x: control.contentItem.x
            y: (parent.height - height) / 2
            width: control.contentItem.width
            text: control.treeView.model.data(control.treeView.index(row, column), __role)
            focus: true
        }

        TableView.onCommit: {
            let index = TableView.view.index(row, column)
            TableView.view.model.setData(index, textField.text, __role)
        }

        Component.onCompleted: textField.selectAll()
    }
    // qmllint enable attached-property-reuse
    // qmllint enable controls-sanity
}
