/****************************************************************************
 *
 * (c) 2009-2020 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
 *
 * QGroundControl is licensed according to the terms in the file
 * COPYING.md in the root of the source code directory.
 *
 ****************************************************************************/
import QtQuick          2.3
import QtQuick.Dialogs  1.2
import QtQuick.Layouts  1.2

import QGroundControl               1.0
import QGroundControl.FactSystem    1.0
import QGroundControl.Controls      1.0
import QGroundControl.ScreenTools   1.0

FactTextField {
    unitsLabel:         fact ? fact.units : ""
    extraUnitsLabel:    fact ? _altitudeModeExtraUnits : ""
    showUnits:          true
    showHelp:           true

    property int altitudeMode: QGroundControl.AltitudeModeNone

    readonly property string _altModeNoneExtraUnits:            ""
    readonly property string _altModeRelativeExtraUnits:        qsTr("(Rel)")
    readonly property string _altModeAbsoluteExtraUnits:        qsTr("(AMSL)")
    readonly property string _altModeAboveTerrainExtraUnits:    qsTr("(Abv Terr)")
    readonly property string _altModeTerrainFrameExtraUnits:    qsTr("(TerrF)")

    property string _altitudeModeExtraUnits:    _altModeNoneExtraUnits
    property Fact   _aboveTerrainWarning:       QGroundControl.settingsManager.planViewSettings.aboveTerrainWarning

    onAltitudeModeChanged: updateAltitudeModeExtraUnits()

    function updateAltitudeModeExtraUnits() {
        if (altitudeMode === QGroundControl.AltitudeModeNone) {
            _altitudeModeExtraUnits = _altModeNoneExtraUnits
        } else if (altitudeMode === QGroundControl.AltitudeModeRelative) {
            _altitudeModeExtraUnits = _altModeRelativeExtraUnits
        } else if (altitudeMode === QGroundControl.AltitudeModeAbsolute) {
            _altitudeModeExtraUnits = _altModeAbsoluteExtraUnits
        } else if (altitudeMode === QGroundControl.AltitudeModeAboveTerrain) {
            _altitudeModeExtraUnits = _altModeAboveTerrainExtraUnits
            if (!_aboveTerrainWarning.rawValue) {
                mainWindow.showComponentDialog(aboveTerrainWarning, qsTr("Warning"), mainWindow.showDialogDefaultWidth, StandardButton.Ok)
            }
        } else if (missionItem.altitudeMode === QGroundControl.AltitudeModeTerrainFrame) {
            _altitudeModeExtraUnits = _altModeTerrainFrameExtraUnits
        } else {
            console.log("AltitudeFactTextField Internal error: Unknown altitudeMode", altitudeMode)
            _altitudeModeExtraUnits = ""
        }
    }

    Component {
        id: aboveTerrainWarning
        QGCViewDialog {
            ColumnLayout {
                anchors.left:   parent.left
                anchors.right:  parent.right
                spacing:        ScreenTools.defaultFontPixelHeight

                QGCLabel {
                    Layout.fillWidth:   true
                    wrapMode:           Text.WordWrap
                    text:               qsTr("'Above Terrain' will set an absolute altitude for the item based on the terrain height at the location and the requested altitude above terrain. It does not send terrain heights to the vehicle.")
                }

                FactCheckBox {
                    text: qsTr("Don't show again")
                    fact: _aboveTerrainWarning
                }
            }
        }
    }
}