/*
    SPDX-FileCopyrightText: 2021 Aleix Pol Gonzalez <aleixpol@kde.org>

    SPDX-License-Identifier: GPL-2.0-or-later
*/

import QtQuick
import QtQuick.Layouts
import QtQuick.Controls as QQC2
import QtQuick.Shapes

import org.kde.kirigami as Kirigami
import org.kde.plasma.tablet.kcm as KCM
import org.kde.kcmutils
import org.kde.kquickcontrols

Kirigami.Form {
    id: root

    required property KCM.InputDevice device

    function settingsRestored(): void {
        // we have to reload this manually because it's function-based
        outputsCombo.currentIndex = outputsCombo.findCurrentIndex();
    }

    function reloadOutputView(): void {
        const initialOutputArea = root.device.outputArea;
        if (initialOutputArea === Qt.rect(0, 0, 1, 1)) {
            outputAreaCombo.currentIndex = 0;
        } else if (initialOutputArea.x === 0 && initialOutputArea.y === 0 && initialOutputArea.width === 1) {
            outputAreaCombo.currentIndex = 1;
        } else {
            outputAreaCombo.currentIndex = 2;
        }
        const initialInputArea = root.device.inputArea;
        if (outputsCombo.currentIndex !== 0) {
            mapping.setOutputAreaMode(outputAreaCombo.currentIndex);
            mapping.setOutputArea(initialOutputArea);
        }
        mapping.setInputArea(initialInputArea);
    }

    Kirigami.FormGroup {
        Kirigami.FormEntry {
            title: i18ndc("kcm_tablet", "@label:listbox", "Map to screen:")
            contentItem: QQC2.ComboBox {
                id: outputsCombo
                model: KCM.OutputsModel {
                    id: outputsModel
                }
                currentIndex: findCurrentIndex()
                textRole: "display"
                onActivated: index => {
                    root.device.outputName = outputsModel.outputNameAt(index)
                    root.device.mapToWorkspace = outputsModel.isMapToWorkspaceAt(index)
                    // If we are switching to "Follow current screen", ensure we're force switched to "Stretch to Fill"
                    if (index === 0) {
                        mapping.setOutputAreaMode(0);
                        outputAreaCombo.currentIndex = 0;
                    }
                    root.reloadOutputView();
                }

                function findCurrentIndex(): int {
                    if (count === 0) {
                        return -1;
                    }

                    return outputsModel.rowForDevice(root.device);
                }
            }
        }

        Kirigami.FormEntry {
            title: i18ndc("kcm_tablet", "@label:listbox", "Orientation:")
            contentItem: QQC2.ComboBox {
                model: KCM.OrientationsModel {
                    id: orientationsModel
                }
                enabled: root.device && root.device.supportsOrientation
                currentIndex: orientationsModel.rowForOrientation(root.device.orientation)
                displayText: root.device.supportsOrientation ? currentText : i18ndc("kcm_tablet", "@label substitute for unavailable orientation change", "Not Applicable")
                textRole: "display"
                onActivated: {
                    root.device.orientation = orientationsModel.orientationAt(currentIndex)
                }
                SettingHighlighter {
                    // First index is "Default"
                    highlight: root.device.supportsOrientation && parent.currentIndex !== 0
                }
            }
        }

        Kirigami.FormEntry {
            title:i18ndc("kcm_tablet", "@label:listbox", "Mapped Area:")
            contentItem: QQC2.ComboBox {
                id: outputAreaCombo
                enabled: outputsCombo.currentIndex !== 0
                model: outputsCombo.currentIndex === 0 ?
                    // We don't support mapping to a portion of the screen with follow current screen, since we have no way to visualize that
                    [i18nc("@item:inlistbox Stretch and fill to the screen", "Stretch and Fill")] :
                    [i18nc("@item:inlistbox Stretch and fill to the screen", "Stretch and Fill"),
                        i18nc("@item:inlistbox Keep aspect ratio and fit within the screen", "Keep Aspect Ratio and Fit"),
                        i18nc("@item:inlistbox Map to portion of the screen", "Map to Portion")]
                onActivated: index => {
                    mapping.outputChanged = true;
                    mapping.setOutputAreaMode(index);
                }
                SettingHighlighter {
                    // The default is stretch to screen
                    highlight: outputAreaCombo.currentIndex !== 0
                }
            }
        }

        // Mapping a tablet onto another display
        Kirigami.FormEntry {
            fullWidth: true
            contentItem: RowLayout {
                Layout.fillWidth: true
                Item {
                    Layout.fillWidth: true
                }
                ExternalScreenMapping {
                    id: mapping

                    implicitWidth: Math.min(root.width, Kirigami.Units.gridUnit * 15)
                    visible: root.device
                    displayVisible: outputsCombo.currentIndex !== 0
                    device: root.device
                    mode: outputAreaCombo.currentIndex
                }
                Item {
                    Layout.fillWidth: true
                }
            }
        }
    }
}