/****************************************************************************
 *
 *   (c) 2009-2016 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                  2.7
import QtQuick.Controls         2.1
import QtQuick.Controls.Styles  1.2
import QtQuick.Dialogs          1.2
import QtLocation               5.6
import QtPositioning            5.5
import QtMultimedia             5.5

import QGroundControl               1.0
import QGroundControl.FlightDisplay 1.0
import QGroundControl.FlightMap     1.0
import QGroundControl.ScreenTools   1.0
import QGroundControl.Controls      1.0
import QGroundControl.Palette       1.0
import QGroundControl.Vehicle       1.0
import QGroundControl.Controllers   1.0
import QGroundControl.FactSystem    1.0

/// Flight Display View
QGCView {
    id:             root
    viewPanel:      _panel

    QGCPalette { id: qgcPal; colorGroupEnabled: enabled }

    property bool activeVehicleJoystickEnabled: _activeVehicle ? _activeVehicle.joystickEnabled : false

    property var _activeVehicle:        QGroundControl.multiVehicleManager.activeVehicle
    property bool _mainIsMap:           QGroundControl.videoManager.hasVideo ? QGroundControl.loadBoolGlobalSetting(_mainIsMapKey,  true) : true
    property bool _isPipVisible:        QGroundControl.videoManager.hasVideo ? QGroundControl.loadBoolGlobalSetting(_PIPVisibleKey, true) : false
    property real _savedZoomLevel:      0
    property real _margins:             ScreenTools.defaultFontPixelWidth / 2
    property real _pipSize:             mainWindow.width * 0.2

    readonly property bool      isBackgroundDark:       _mainIsMap ? (_flightMap ? _flightMap.isSatelliteMap : true) : true
    readonly property real      _defaultRoll:           0
    readonly property real      _defaultPitch:          0
    readonly property real      _defaultHeading:        0
    readonly property real      _defaultAltitudeAMSL:   0
    readonly property real      _defaultGroundSpeed:    0
    readonly property real      _defaultAirSpeed:       0
    readonly property string    _mapName:               "FlightDisplayView"
    readonly property string    _showMapBackgroundKey:  "/showMapBackground"
    readonly property string    _mainIsMapKey:          "MainFlyWindowIsMap"
    readonly property string    _PIPVisibleKey:         "IsPIPVisible"

    function setStates() {
        QGroundControl.saveBoolGlobalSetting(_mainIsMapKey, _mainIsMap)
        if(_mainIsMap) {
            //-- Adjust Margins
            _flightMapContainer.state   = "fullMode"
            _flightVideo.state          = "pipMode"
            //-- Save/Restore Map Zoom Level
            if(_savedZoomLevel != 0)
                _flightMap.zoomLevel = _savedZoomLevel
            else
                _savedZoomLevel = _flightMap.zoomLevel
        } else {
            //-- Adjust Margins
            _flightMapContainer.state   = "pipMode"
            _flightVideo.state          = "fullMode"
            //-- Set Map Zoom Level
            _savedZoomLevel = _flightMap.zoomLevel
            _flightMap.zoomLevel = _savedZoomLevel - 3
        }
    }

    function setPipVisibility(state) {
        _isPipVisible = state;
        QGroundControl.saveBoolGlobalSetting(_PIPVisibleKey, state)
    }

    function px4JoystickCheck() {
        if ( _activeVehicle && !_activeVehicle.supportsManualControl && (QGroundControl.settingsManager.appSettings.virtualJoystick.value || _activeVehicle.joystickEnabled)) {
            px4JoystickSupport.open()
        }
    }

    MessageDialog {
        id:     px4JoystickSupport
        text:   qsTr("Joystick support requires MAVLink MANUAL_CONTROL support. ") +
                qsTr("The firmware you are running does not normally support this. ") +
                qsTr("It will only work if you have modified the firmware to add MANUAL_CONTROL support.")
    }

    Connections {
        target: QGroundControl.multiVehicleManager
        onActiveVehicleChanged: px4JoystickCheck()
    }

    Connections {
        target:         QGroundControl.settingsManager.appSettings.virtualJoystick
        onValueChanged: px4JoystickCheck()
    }

    onActiveVehicleJoystickEnabledChanged: px4JoystickCheck()

    Component.onCompleted: {
        setStates()
        px4JoystickCheck()
    }

    QGCMapPalette { id: mapPal; lightColors: _mainIsMap ? _flightMap.isSatelliteMap : true }

    QGCViewPanel {
        id:             _panel
        anchors.fill:   parent

        //-- Map View
        //   For whatever reason, if FlightDisplayViewMap is the _panel item, changing
        //   width/height has no effect.
        Item {
            id: _flightMapContainer
            z:  _mainIsMap ? _panel.z + 1 : _panel.z + 2
            anchors.left:   _panel.left
            anchors.bottom: _panel.bottom
            visible:        _mainIsMap || _isPipVisible
            width:          _mainIsMap ? _panel.width  : _pipSize
            height:         _mainIsMap ? _panel.height : _pipSize * (9/16)
            states: [
                State {
                    name:   "pipMode"
                    PropertyChanges {
                        target:             _flightMapContainer
                        anchors.margins:    ScreenTools.defaultFontPixelHeight
                    }
                },
                State {
                    name:   "fullMode"
                    PropertyChanges {
                        target:             _flightMapContainer
                        anchors.margins:    0
                    }
                }
            ]
            FlightDisplayViewMap {
                id:                 _flightMap
                anchors.fill:       parent
                flightWidgets:      flightDisplayViewWidgets
                rightPanelWidth:    ScreenTools.defaultFontPixelHeight * 9
            }
        }

        //-- Video View
        Item {
            id:             _flightVideo
            z:              _mainIsMap ? _panel.z + 2 : _panel.z + 1
            width:          !_mainIsMap ? _panel.width  : _pipSize
            height:         !_mainIsMap ? _panel.height : _pipSize * (9/16)
            anchors.left:   _panel.left
            anchors.bottom: _panel.bottom
            visible:        QGroundControl.videoManager.hasVideo && (!_mainIsMap || _isPipVisible)
            states: [
                State {
                    name:   "pipMode"
                    PropertyChanges {
                        target: _flightVideo
                        anchors.margins:    ScreenTools.defaultFontPixelHeight
                    }
                },
                State {
                    name:   "fullMode"
                    PropertyChanges {
                        target: _flightVideo
                        anchors.margins:    0
                    }
                }
            ]
            //-- Video Streaming
            FlightDisplayViewVideo {
                anchors.fill:   parent
                visible:        QGroundControl.videoManager.isGStreamer
            }
            //-- UVC Video (USB Camera or Video Device)
            Loader {
                id:             cameraLoader
                anchors.fill:   parent
                visible:        !QGroundControl.videoManager.isGStreamer
                source:         QGroundControl.videoManager.uvcEnabled ? "qrc:/qml/FlightDisplayViewUVC.qml" : "qrc:/qml/FlightDisplayViewDummy.qml"
            }
        }

        QGCPipable {
            id:                 _flightVideoPipControl
            z:                  _flightVideo.z + 3
            width:              _pipSize
            height:             _pipSize * (9/16)
            anchors.left:       _panel.left
            anchors.bottom:     _panel.bottom
            anchors.margins:    ScreenTools.defaultFontPixelHeight
            visible:            QGroundControl.videoManager.hasVideo
            isHidden:           !_isPipVisible
            isDark:             isBackgroundDark
            onActivated: {
                _mainIsMap = !_mainIsMap
                setStates()
            }
            onHideIt: {
                setPipVisibility(!state)
            }
        }

        Row {
            id:                     singleMultiSelector
            anchors.topMargin:      ScreenTools.toolbarHeight + _margins
            anchors.rightMargin:    _margins
            anchors.right:          parent.right
            anchors.top:            parent.top
            spacing:                ScreenTools.defaultFontPixelWidth
            z:                      _panel.z + 4
            visible:                QGroundControl.multiVehicleManager.vehicles.count > 1

            ExclusiveGroup { id: multiVehicleSelectorGroup }

            QGCRadioButton {
                id:             singleVehicleView
                exclusiveGroup: multiVehicleSelectorGroup
                text:           qsTr("Single")
                checked:        true
                color:          mapPal.text
            }

            QGCRadioButton {
                exclusiveGroup: multiVehicleSelectorGroup
                text:           qsTr("Multi-Vehicle (WIP)")
                color:          mapPal.text
            }
        }

        FlightDisplayViewWidgets {
            id:                 flightDisplayViewWidgets
            z:                  _panel.z + 4
            height:             ScreenTools.availableHeight
            anchors.left:       parent.left
            anchors.right:      parent.right
            anchors.bottom:     parent.bottom
            qgcView:            root
            isBackgroundDark:   root.isBackgroundDark
            visible:            singleVehicleView.checked
        }

        // Button to start/stop video recording
        Item {
            z:                  _flightVideoPipControl.z + 1
            anchors.margins:    ScreenTools.defaultFontPixelHeight / 2
            anchors.bottom:     _flightVideo.bottom
            anchors.right:      _flightVideo.right
            height:             ScreenTools.defaultFontPixelHeight * 2
            width:              height
            visible:            QGroundControl.videoManager.videoRunning && QGroundControl.videoManager.recordingEnabled
            opacity:            0.75

            Rectangle {
                anchors.top:        parent.top
                anchors.bottom:     parent.bottom
                width:              height
                radius:             QGroundControl.videoManager && QGroundControl.videoManager.videoReceiver && QGroundControl.videoManager.videoReceiver.recording ? 0 : height
                color:              "red"
            }

            QGCColoredImage {
                anchors.top:                parent.top
                anchors.bottom:             parent.bottom
                anchors.horizontalCenter:   parent.horizontalCenter
                width:                      height * 0.625
                sourceSize.width:           width
                source:                     "/qmlimages/CameraIcon.svg"
                fillMode:                   Image.PreserveAspectFit
                color:                      "white"
            }

            MouseArea {
                anchors.fill:   parent
                onClicked:      QGroundControl.videoManager.videoReceiver && QGroundControl.videoManager.videoReceiver.recording ? QGroundControl.videoManager.videoReceiver.stopRecording() : QGroundControl.videoManager.videoReceiver.startRecording()
            }
        }

        MultiVehicleList {
            anchors.margins:    _margins
            anchors.top:        singleMultiSelector.bottom
            anchors.right:      parent.right
            anchors.bottom:     parent.bottom
            width:              ScreenTools.defaultFontPixelWidth * 30
            visible:            !singleVehicleView.checked
            z:                  _panel.z + 4
        }


        //-- Virtual Joystick
        Loader {
            id:                         virtualJoystickMultiTouch
            z:                          _panel.z + 5
            width:                      parent.width  - (_flightVideoPipControl.width / 2)
            height:                     Math.min(ScreenTools.availableHeight * 0.25, ScreenTools.defaultFontPixelWidth * 16)
            visible:                    _virtualJoystick.value
            anchors.bottom:             _flightVideoPipControl.top
            anchors.bottomMargin:       ScreenTools.defaultFontPixelHeight * 2
            anchors.horizontalCenter:   flightDisplayViewWidgets.horizontalCenter
            source:                     "qrc:/qml/VirtualJoystick.qml"
            active:                     _virtualJoystick.value

            property bool useLightColors: root.isBackgroundDark

            property Fact _virtualJoystick: QGroundControl.settingsManager.appSettings.virtualJoystick
        }
    }
}