// SPDX-FileCopyrightText: 2021 Carl Schwan <carlschwan@kde.org>
// SPDX-License-Identifier: LGPL-2.1-or-later

import QtQml 2.15
import QtQuick 2.15
import QtQuick.Controls 2.15 as QQC2
import QtQuick.Layouts 1.15
import org.kde.kirigami 2.15 as Kirigami
import org.kde.sonnet 1.0 as Sonnet

Kirigami.Page {
    id: page

    /**
     * This property holds whether the setting on that page are automatically
     * applied or whether the user can apply then manually. By default, false.
     */
    property bool instantApply: false

    /**
     * This property holds whether the ListViews inside the page should get
     * extra padding and a background. By default, use the Kirigami.ApplicationWindow
     * wideMode value.
     */
    property bool wideMode: QQC2.ApplicationWindow.window.wideMode ?? QQC2.ApplicationWindow.window.width > Kirigami.Units.gridUnit * 40

    /**
     * Signal emmited when the user decide to discard it's change and close the
     * setting page.
     *
     * For example when using the ConfigPage inside Kirigami PageRow:
     *
     * \code
     * Sonnet.ConfigPage {
     *      onClose: applicationWindow().pageStack.pop();
     * }
     * \endcode
     */
    signal close()

    function onBackRequested(event) {
        if (settings.modified) {
            applyDialog.open();
            event.accepted = true;
        }
        if (dialog) {
            dialog.close();
        }
    }
    title: i18nc("@window:title", "Spellchecking")

    QQC2.Dialog {
        id: applyDialog
        title: qsTr("Apply Settings")
        contentItem: QQC2.Label {
            text: qsTr("The settings of the current module have changed.<br /> Do you want to apply the changes or discard them?")
        }
        standardButtons: QQC2.Dialog.Ok | QQC2.Dialog.Cancel | QQC2.Dialog.Discard

        onAccepted: {
            settings.save();
            applyDialog.close();
            page.close();
        }
        onDiscarded: {
            applyDialog.close();
            page.close();
        }
        onRejected: applyDialog.close();
    }

    onWideModeChanged: scroll.background.visible = wideMode;

    leftPadding: wideMode ? Kirigami.Units.gridUnit : 0
    topPadding: wideMode ? Kirigami.Units.gridUnit : 0
    bottomPadding: wideMode ? Kirigami.Units.gridUnit : 0
    rightPadding: wideMode ? Kirigami.Units.gridUnit : 0

    property var dialog: null

    Sonnet.Settings {
        id: settings
    }

    ColumnLayout {
        anchors.fill: parent

        Kirigami.FormLayout {
            Layout.fillWidth: true
            Layout.leftMargin: wideMode ? 0 : Kirigami.Units.largeSpacing
            Layout.rightMargin: wideMode ? 0 : Kirigami.Units.largeSpacing

            QQC2.ComboBox {
                Kirigami.FormData.label: i18n("Selected default language:")
                model: settings.dictionaryModel
                textRole: "display"
                valueRole: "languageCode"
                Component.onCompleted: currentIndex = indexOfValue(settings.defaultLanguage);
                onActivated: {
                    settings.defaultLanguage = currentValue;
                }
            }

            QQC2.Button {
                text: i18n("Open Personal Dictionary")
                onClicked: if (!dialog) {
                    if (Kirigami.Settings.isMobile) {
                        dialog = mobileSheet.createObject(page, {settings: settings});
                        dialog.open();
                    } else {
                        dialog = desktopSheet.createObject(page, {settings: settings})
                        dialog.show();
                    }
                } else {
                    if (Kirigami.Settings.isMobile) {
                        dialog.open();
                    } else {
                        dialog.show();
                    }
                }
            }

            QQC2.CheckBox {
                Kirigami.FormData.label: i18n("Options:")
                checked: settings.checkerEnabledByDefault
                text: i18n("Enable automatic spell checking")
                onCheckedChanged: {
                    settings.checkerEnabledByDefault = checked;
                    if (instantApply) {
                        settings.save();
                    }
                }
            }

            QQC2.CheckBox {
                checked: settings.skipUppercase
                text: i18n("Ignore uppercase words")
                onCheckedChanged: {
                    settings.skipUppercase = checked;
                    if (instantApply) {
                        settings.save();
                    }
                }
            }

            QQC2.CheckBox {
                checked: settings.skipRunTogether
                text: i18n("Ignore hyphenated words")
                onCheckedChanged: {
                    settings.skipRunTogether = checked;
                    if (instantApply) {
                        settings.save();
                    }
                }
            }

            QQC2.CheckBox {
                id: autodetectLanguageCheckbox
                checked: settings.autodetectLanguage
                text: i18n("Detect language automatically")
                onCheckedChanged: {
                    settings.autodetectLanguage = checked;
                    if (instantApply) {
                        settings.save();
                    }
                }
            }
        }

        Kirigami.Heading {
            level: 2
            text: i18n("Spell checking languages")
            wrapMode: Text.WordWrap
            Layout.fillWidth: true
            Layout.topMargin: Kirigami.Units.largeSpacing
            Layout.leftMargin: wideMode ? 0 : Kirigami.Units.largeSpacing
            Layout.rightMargin: wideMode ? 0 : Kirigami.Units.largeSpacing
        }
        QQC2.Label {
            text: i18n("%1 will provide spell checking and suggestions for the languages listed here when autodetection is enabled.", Qt.application.displayName)
            wrapMode: Text.WordWrap
            Layout.fillWidth: true
            Layout.leftMargin: wideMode ? 0 : Kirigami.Units.largeSpacing
            Layout.rightMargin: wideMode ? 0 : Kirigami.Units.largeSpacing
        }

        QQC2.ScrollView {
            id: scroll
            Layout.fillWidth: true
            Layout.fillHeight: true
            enabled: autodetectLanguageCheckbox.checked
            Component.onCompleted: background.visible = wideMode

            // HACK: Hide unnecessary horizontal scrollbar (https://bugreports.qt.io/browse/QTBUG-83890)
            QQC2.ScrollBar.horizontal.policy: QQC2.ScrollBar.AlwaysOff

            ListView {
                clip: true
                model: settings.dictionaryModel
                delegate: Kirigami.CheckableListItem {
                    label: model.display
                    action: Kirigami.Action {
                        onTriggered: model.checked = checked
                    }
                    checked: model.checked
                    trailing: Kirigami.Icon {
                        source: "favorite"
                        visible: model.isDefault
                        HoverHandler {
                            id: hover
                        }
                        QQC2.ToolTip {
                            visible: hover.hovered
                            text: qsTr("Default Language")
                        }
                    }
                }
            }
        }
    }

    component SheetHeader : RowLayout {
        QQC2.TextField {
            id: dictionaryField
            Layout.fillWidth: true
            placeholderText: i18n("Add a new word to your personal dictionary…")
        }
        QQC2.Button {
            text: i18nc("@action:button", "Add word")
            icon.name: "list-add"
            enabled: dictionaryField.text.length > 0
            onClicked: {
                add(dictionaryField.text);
                dictionaryField.clear();
                if (instantApply) {
                    settings.save();
                }
            }
            Layout.rightMargin: Kirigami.Units.largeSpacing
        }
    }

    Component {
        id: desktopSheet
        QQC2.ApplicationWindow {
            id: window
            required property Sonnet.Settings settings
            title: i18n("Spell checking dictionary")
            width: Kirigami.Units.gridUnit * 20
            height: Kirigami.Units.gridUnit * 20
            flags: Qt.Dialog | Qt.WindowCloseButtonHint
            header: Kirigami.AbstractApplicationHeader {
                leftPadding: Kirigami.Units.smallSpacing
                rightPadding: Kirigami.Units.smallSpacing
                contentItem: SheetHeader {
                    anchors.fill: parent
                }
            }
            QQC2.ScrollView {
                anchors.fill: parent

                // HACK: Hide unnecessary horizontal scrollbar (https://bugreports.qt.io/browse/QTBUG-83890)
                QQC2.ScrollBar.horizontal.policy: QQC2.ScrollBar.AlwaysOff

                ListView {
                    model: settings.currentIgnoreList
                    delegate: Kirigami.BasicListItem {
                        label: model.modelData
                        trailing: QQC2.ToolButton {
                            icon.name: "delete"
                            onClicked: {
                                remove(modelData)
                                if (instantApply) {
                                    settings.save();
                                }
                            }
                            QQC2.ToolTip {
                                text: i18n("Delete word")
                            }
                        }
                    }
                }
            }
        }
    }

    Component {
        id: mobileSheet
        Kirigami.OverlaySheet {
            required property Sonnet.Settings settings
            id: dictionarySheet

            header: SheetHeader {}

            ListView {
                implicitWidth: Kirigami.Units.gridUnit * 15
                model: settings.currentIgnoreList
                delegate: Kirigami.BasicListItem {
                    label: model.modelData
                    trailing: QQC2.ToolButton {
                        icon.name: "delete"
                        onClicked: {
                            remove(modelData)
                            if (instantApply) {
                                settings.save();
                            }
                        }
                        QQC2.ToolTip {
                            text: i18n("Delete word")
                        }
                    }
                }
            }
        }
    }

    footer: QQC2.ToolBar {
        visible: !instantApply
        height: visible ? implicitHeight : 0
        contentItem: RowLayout {
            Item {
                Layout.fillWidth: true
            }

            QQC2.Button  {
                text: i18n("Apply")
                enabled: settings.modified
                onClicked: settings.save();
            }
        }
    }

    function add(word) {
        const dictionary = settings.currentIgnoreList;
        dictionary.push(word);
        settings.currentIgnoreList = dictionary;
    }

    function remove(word) {
        settings.currentIgnoreList = settings.currentIgnoreList.filter(function (value, _, _) {
            return value !== word;
        });
    }
}