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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

import QtQuick
import QtQuick.Controls
import QtQuick.Layouts
import Qt.labs.platform as PlatformWidgets
import HelperWidgets as HelperWidgets
import StudioControls as StudioControls
import StudioTheme as StudioTheme

StudioControls.Dialog {
    id: root

    title: qsTr("Import a model")
    anchors.centerIn: parent
    closePolicy: Popup.CloseOnEscape
    modal: true

    required property var backendValue

    property bool fileExists: false

    onOpened: {
        collectionName.text = "Model"
        fileName.text = qsTr("Model path")
        fileName.selectAll()
        fileName.forceActiveFocus()
    }

    onRejected: {
        fileName.text = ""
    }

    RegularExpressionValidator {
        id: fileNameValidator
        regularExpression: /^(\w[^*><?|]*)[^/\\:*><?|]$/
    }

    PlatformWidgets.FileDialog {
        id: fileDialog
        nameFilters : ["All Model Files (*.json *.csv)",
            "JSON Files (*.json)",
            "Comma-Separated Values (*.csv)"]

        title: qsTr("Select a model file")
        fileMode: PlatformWidgets.FileDialog.OpenFile
        acceptLabel: qsTr("Open")

        onAccepted: fileName.text = fileDialog.file
    }

    Message {
        id: creationFailedDialog

        title: qsTr("Could not load the file")
        message: qsTr("An error occurred while trying to load the file.")

        onClosed: root.reject()
    }

    component Spacer: Item {
        implicitWidth: 1
        implicitHeight: StudioTheme.Values.columnGap
    }

    contentItem: ColumnLayout {
        spacing: 2

        Text {
            text: qsTr("File name")
            color: StudioTheme.Values.themeTextColor
        }

        RowLayout {
            spacing: StudioTheme.Values.sectionRowSpacing

            Layout.fillWidth: true

            StudioControls.TextField {
                id: fileName

                Layout.alignment: Qt.AlignLeft | Qt.AlignVCenter
                Layout.fillWidth: true

                actionIndicator.visible: false
                translationIndicator.visible: false
                validator: fileNameValidator

                Keys.onEnterPressed: btnImport.onClicked()
                Keys.onReturnPressed: btnImport.onClicked()
                Keys.onEscapePressed: root.reject()

                onTextChanged: root.fileExists = root.backendValue.isValidUrlToImport(fileName.text)
            }

            HelperWidgets.Button {
                id: fileDialogButton

                Layout.alignment: Qt.AlignRight | Qt.AlignVCenter

                text: qsTr("Open")
                onClicked: fileDialog.open()
            }
        }

        Spacer {}

        Text {
            text: qsTr("The model name")
            color: StudioTheme.Values.themeTextColor
        }

        StudioControls.TextField {
            id: collectionName

            Layout.fillWidth: true

            actionIndicator.visible: false
            translationIndicator.visible: false
            validator: RegularExpressionValidator {
                regularExpression: /^[\w ]+$/
            }

            Keys.onEnterPressed: btnImport.onClicked()
            Keys.onReturnPressed: btnImport.onClicked()
            Keys.onEscapePressed: root.reject()
        }

        Spacer { implicitHeight: StudioTheme.Values.controlLabelGap }

        Label {
            id: fieldErrorText

            Layout.fillWidth: true

            color: StudioTheme.Values.themeTextColor
            wrapMode: Label.WordWrap
            padding: 5

            background: Rectangle {
                color: "transparent"
                border.width: StudioTheme.Values.border
                border.color: StudioTheme.Values.themeWarning
            }

            states: [
                State {
                    name: "default"
                    when: fileName.text !== "" && collectionName.text !== ""

                    PropertyChanges {
                        target: fieldErrorText
                        text: ""
                        visible: false
                    }
                },
                State {
                    name: "fileError"
                    when: fileName.text === ""

                    PropertyChanges {
                        target: fieldErrorText
                        text: qsTr("File name can not be empty")
                        visible: true
                    }
                },
                State {
                    name: "collectionNameError"
                    when: collectionName.text === ""

                    PropertyChanges {
                        target: fieldErrorText
                        text: qsTr("The model name can not be empty")
                        visible: true
                    }
                }
            ]
        }

        Spacer {}

        RowLayout {
            spacing: StudioTheme.Values.sectionRowSpacing

            Layout.alignment: Qt.AlignRight | Qt.AlignVCenter

            HelperWidgets.Button {
                id: btnImport

                text: qsTr("Import")
                enabled: root.fileExists && collectionName.text !== ""

                onClicked: {
                    let collectionImported = root.backendValue.importFile(
                            collectionName.text,
                            fileName.text)

                    if (collectionImported)
                        root.accept()
                    else
                        creationFailedDialog.open()
                }
            }

            HelperWidgets.Button {
                text: qsTr("Cancel")
                onClicked: root.reject()
            }
        }
    }
}