/****************************************************************************
 *
 *   (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          2.3
import QtQuick.Controls 1.2
import QtQuick.Dialogs  1.2
import QtPositioning    5.3

import QGroundControl                       1.0
import QGroundControl.Palette               1.0
import QGroundControl.Controls              1.0
import QGroundControl.FlightDisplay         1.0
import QGroundControl.ScreenTools           1.0
import QGroundControl.MultiVehicleManager   1.0

/// Inner common QML for mainWindow
Item {
    id: mainWindow

    signal reallyClose

    QGCPalette { id: qgcPal; colorGroupEnabled: true }

    property var    currentPopUp:       null
    property real   currentCenterX:     0
    property var    activeVehicle:      QGroundControl.multiVehicleManager.activeVehicle
    property string formatedMessage:    activeVehicle ? activeVehicle.formatedMessage : ""

    property var _viewList: [ settingsViewLoader, setupViewLoader, planViewLoader, flightView, analyzeViewLoader ]

    readonly property string _settingsViewSource:   "AppSettings.qml"
    readonly property string _setupViewSource:      "SetupView.qml"
    readonly property string _planViewSource:       "PlanView.qml"
    readonly property string _analyzeViewSource:    "AnalyzeView.qml"

    onHeightChanged: {
        //-- We only deal with the available height if within the Fly or Plan view
        if(!setupViewLoader.visible) {
            ScreenTools.availableHeight = parent.height - toolBar.height
        }
    }

    function disableToolbar() {
        toolbarBlocker.enabled = true
    }

    function enableToolbar() {
        toolbarBlocker.enabled = false
    }

    function hideAllViews() {
        for (var i=0; i<_viewList.length; i++) {
            _viewList[i].visible = false
        }
        planToolBar.visible = false
    }

    function showSettingsView() {
        mainWindow.enableToolbar()
        rootLoader.sourceComponent = null
        if(currentPopUp) {
            currentPopUp.close()
        }
        //-- In settings view, the full height is available. Set to 0 so it is ignored.
        ScreenTools.availableHeight = 0
        hideAllViews()
        if (settingsViewLoader.source != _settingsViewSource) {
            settingsViewLoader.source  = _settingsViewSource
        }
        settingsViewLoader.visible  = true
        toolBar.checkSettingsButton()
    }

    function showSetupView() {
        mainWindow.enableToolbar()
        rootLoader.sourceComponent = null
        if(currentPopUp) {
            currentPopUp.close()
        }
        //-- In setup view, the full height is available. Set to 0 so it is ignored.
        ScreenTools.availableHeight = 0
        hideAllViews()
        if (setupViewLoader.source  != _setupViewSource) {
            setupViewLoader.source  = _setupViewSource
        }
        setupViewLoader.visible  = true
        toolBar.checkSetupButton()
    }

    function showPlanView() {
        mainWindow.enableToolbar()
        rootLoader.sourceComponent = null
        if(currentPopUp) {
            currentPopUp.close()
        }
        if (planViewLoader.source   != _planViewSource) {
            planViewLoader.source   = _planViewSource
        }
        ScreenTools.availableHeight = parent.height - toolBar.height
        hideAllViews()
        planViewLoader.visible = true
        planToolBar.visible = true
    }

    function showFlyView() {
        mainWindow.enableToolbar()
        rootLoader.sourceComponent = null
        if(currentPopUp) {
            currentPopUp.close()
        }
        ScreenTools.availableHeight = parent.height - toolBar.height
        hideAllViews()
        flightView.visible = true
        toolBar.checkFlyButton()
    }

    function showAnalyzeView() {
        mainWindow.enableToolbar()
        rootLoader.sourceComponent = null
        if(currentPopUp) {
            currentPopUp.close()
        }
        ScreenTools.availableHeight = 0
        if (analyzeViewLoader.source  != _analyzeViewSource) {
            analyzeViewLoader.source  = _analyzeViewSource
        }
        hideAllViews()
        analyzeViewLoader.visible = true
        toolBar.checkAnalyzeButton()
    }

    /// Start the process of closing QGroundControl. Prompts the user are needed.
    function attemptWindowClose() {
        unsavedMissionCloseDialog.check()
    }

    function finishCloseProcess() {
        QGroundControl.linkManager.shutdown()
        // The above shutdown causes a flurry of activity as the vehicle components are removed. This in turn
        // causes the Windows Version of Qt to crash if you allow the close event to be accepted. In order to prevent
        // the crash, we ignore the close event and setup a delayed timer to close the window after things settle down.
        if(ScreenTools.isWindows) {
            delayedWindowCloseTimer.start()
        } else {
            mainWindow.reallyClose()
        }
    }

    MessageDialog {
        id:                 unsavedMissionCloseDialog
        title:              qsTr("%1 close").arg(QGroundControl.appName)
        text:               qsTr("You have a mission edit in progress which has not been saved/sent. If you close you will lose changes. Are you sure you want to close?")
        standardButtons:    StandardButton.Yes | StandardButton.No
        modality:           Qt.ApplicationModal
        visible:            false

        onYes: activeConnectionsCloseDialog.check()

        function check() {
            if (planViewLoader.item && planViewLoader.item.syncNeeded) {
                unsavedMissionCloseDialog.open()
            } else {
                activeConnectionsCloseDialog.check()
            }
        }
    }

    MessageDialog {
        id:                 activeConnectionsCloseDialog
        title:              qsTr("%1 close").arg(QGroundControl.appName)
        text:               qsTr("There are still active connections to vehicles. Do you want to disconnect these before closing?")
        standardButtons:    StandardButton.Yes | StandardButton.Cancel
        modality:           Qt.ApplicationModal
        visible:            false
        onYes:              finishCloseProcess()

        function check() {
            if (QGroundControl.multiVehicleManager.activeVehicle) {
                activeConnectionsCloseDialog.open()
            } else {
                finishCloseProcess()
            }
        }
    }

    Timer {
        id:         delayedWindowCloseTimer
        interval:   1500
        running:    false
        repeat:     false

        onTriggered: {
            mainWindow.reallyClose()
        }
    }

    property var messageQueue: []

    function showMessage(message) {
        if(criticalMmessageArea.visible || QGroundControl.videoManager.fullScreen) {
            messageQueue.push(message)
        } else {
            criticalMessageText.text = message
            criticalMmessageArea.visible = true
        }
    }

    function formatMessage(message) {
        message = message.replace(new RegExp("<#E>", "g"), "color: #f95e5e; font: " + (ScreenTools.defaultFontPointSize.toFixed(0) - 1) + "pt monospace;");
        message = message.replace(new RegExp("<#I>", "g"), "color: #f9b55e; font: " + (ScreenTools.defaultFontPointSize.toFixed(0) - 1) + "pt monospace;");
        message = message.replace(new RegExp("<#N>", "g"), "color: #ffffff; font: " + (ScreenTools.defaultFontPointSize.toFixed(0) - 1) + "pt monospace;");
        return message;
    }

    onFormatedMessageChanged: {
        if(messageArea.visible) {
            messageText.append(formatMessage(formatedMessage))
            //-- Hack to scroll down
            messageFlick.flick(0,-500)
        }
    }

    function showMessageArea() {
        mainWindow.enableToolbar()
        rootLoader.sourceComponent = null
        var currentlyVisible = messageArea.visible
        if(currentPopUp) {
            currentPopUp.close()
        }
        if(!currentlyVisible) {
            if(QGroundControl.multiVehicleManager.activeVehicleAvailable) {
                messageText.text = formatMessage(activeVehicle.formatedMessages)
                //-- Hack to scroll to last message
                for (var i = 0; i < activeVehicle.messageCount; i++)
                    messageFlick.flick(0,-5000)
                activeVehicle.resetMessages()
            } else {
                messageText.text = qsTr("No Messages")
            }
            currentPopUp = messageArea
            messageArea.visible = true
        }
    }

    function showPopUp(dropItem, centerX) {
        mainWindow.enableToolbar()
        rootLoader.sourceComponent = null
        var oldIndicator = indicatorDropdown.sourceComponent
        if(currentPopUp) {
            currentPopUp.close()
        }
        if(oldIndicator !== dropItem) {
            //console.log(oldIndicator)
            //console.log(dropItem)
            indicatorDropdown.centerX = centerX
            indicatorDropdown.sourceComponent = dropItem
            indicatorDropdown.visible = true
            currentPopUp = indicatorDropdown
        }
    }

    //-- Main UI

    MainToolBar {
        id:                 toolBar
        height:             ScreenTools.toolbarHeight
        visible:            !QGroundControl.videoManager.fullScreen
        anchors.left:       parent.left
        anchors.right:      parent.right
        anchors.top:        parent.top
        opacity:            planToolBar.visible ? 0 : 1
        z:                  QGroundControl.zOrderTopMost

        Component.onCompleted:  ScreenTools.availableHeight = parent.height - toolBar.height
        onShowSettingsView:     mainWindow.showSettingsView()
        onShowSetupView:        mainWindow.showSetupView()
        onShowPlanView:         mainWindow.showPlanView()
        onShowFlyView:          mainWindow.showFlyView()
        onShowAnalyzeView:      mainWindow.showAnalyzeView()
        onArmVehicle:           flightView.guidedController.confirmAction(flightView.guidedController.actionArm)
        onDisarmVehicle: {
            if (flightView.guidedController.showEmergenyStop) {
                flightView.guidedController.confirmAction(flightView.guidedController.actionEmergencyStop)
            } else {
                flightView.guidedController.confirmAction(flightView.guidedController.actionDisarm)
            }
        }
        onVtolTransitionToFwdFlight:    flightView.guidedController.confirmAction(flightView.guidedController.actionVtolTransitionToFwdFlight)
        onVtolTransitionToMRFlight:     flightView.guidedController.confirmAction(flightView.guidedController.actionVtolTransitionToMRFlight)

        //-- Entire tool bar area disable on cammand
        DeadMouseArea {
            id:             toolbarBlocker
            enabled:        false
            anchors.fill:   parent
        }
    }

    PlanToolBar {
        id:                 planToolBar
        height:             ScreenTools.toolbarHeight
        anchors.left:       parent.left
        anchors.right:      parent.right
        anchors.top:        parent.top
        z:                  toolBar.z + 1

        onShowFlyView: {
            planToolBar.visible = false
            mainWindow.showFlyView()
        }
    }

    Loader {
        id:                 settingsViewLoader
        anchors.left:       parent.left
        anchors.right:      parent.right
        anchors.top:        toolBar.bottom
        anchors.bottom:     parent.bottom
        visible:            false
/*
        onVisibleChanged: {
            if (!visible) {
                // Free up the memory for this when not shown. No need to persist.
                source = ""
            }
        }*/
    }

    Loader {
        id:                 setupViewLoader
        anchors.left:       parent.left
        anchors.right:      parent.right
        anchors.top:        toolBar.bottom
        anchors.bottom:     parent.bottom
        visible:            false

        property var planToolBar: planToolBar
    }

    Loader {
        id:                 planViewLoader
        anchors.fill:       parent
        visible:            false

        property var toolbar: planToolBar
    }

    FlightDisplayView {
        id:                 flightView
        anchors.fill:       parent
        visible:            true
        //-------------------------------------------------------------------------
        //-- Loader helper for any child, no matter how deep can display an element
        //   on top of the video window.
        Loader {
            id:             rootVideoLoader
            anchors.centerIn: parent
        }
    }

    Loader {
        id:                 analyzeViewLoader
        anchors.left:       parent.left
        anchors.right:      parent.right
        anchors.top:        toolBar.bottom
        anchors.bottom:     parent.bottom
        visible:            false
    }

    //-------------------------------------------------------------------------
    //-- Dismiss Pop Up Messages
    MouseArea {
        visible:        currentPopUp != null
        enabled:        currentPopUp != null
        anchors.fill:   parent
        onClicked: {
            currentPopUp.close()
        }
    }

    //-------------------------------------------------------------------------
    //-- Indicator Drop Down Info
    Loader {
        id: indicatorDropdown
        visible: false
        property real centerX: 0
        function close() {
            sourceComponent = null
            mainWindow.currentPopUp = null
        }
    }

    //-------------------------------------------------------------------------
    //-- System Message Area
    Rectangle {
        id:                 messageArea
        function close() {
            currentPopUp = null
            messageText.text    = ""
            messageArea.visible = false
        }
        width:              mainWindow.width  * 0.5
        height:             mainWindow.height * 0.5
        color:              Qt.rgba(0,0,0,0.8)
        visible:            false
        radius:             ScreenTools.defaultFontPixelHeight * 0.5
        border.color:       "#808080"
        border.width:       2
        anchors.horizontalCenter:   parent.horizontalCenter
        anchors.top:                parent.top
        anchors.topMargin:          toolBar.height + ScreenTools.defaultFontPixelHeight
        MouseArea {
            // This MouseArea prevents the Map below it from getting Mouse events. Without this
            // things like mousewheel will scroll the Flickable and then scroll the map as well.
            anchors.fill:       parent
            preventStealing:    true
            onWheel:            wheel.accepted = true
        }
        QGCFlickable {
            id:                 messageFlick
            anchors.margins:    ScreenTools.defaultFontPixelHeight
            anchors.fill:       parent
            contentHeight:      messageText.height
            contentWidth:       messageText.width
            pixelAligned:       true
            clip:               true
            TextEdit {
                id:             messageText
                readOnly:       true
                textFormat:     TextEdit.RichText
                color:          "white"
            }
        }
        //-- Dismiss System Message
        Image {
            anchors.margins:    ScreenTools.defaultFontPixelHeight * 0.5
            anchors.top:        parent.top
            anchors.right:      parent.right
            width:              ScreenTools.isMobile ? ScreenTools.defaultFontPixelHeight * 1.5 : ScreenTools.defaultFontPixelHeight
            height:             width
            sourceSize.height:  width
            source:             "/res/XDelete.svg"
            fillMode:           Image.PreserveAspectFit
            mipmap:             true
            smooth:             true
            MouseArea {
                anchors.fill:       parent
                anchors.margins:    ScreenTools.isMobile ? -ScreenTools.defaultFontPixelHeight : 0
                onClicked: {
                    messageArea.close()
                }
            }
        }
        //-- Clear Messages
        Image {
            anchors.bottom:     parent.bottom
            anchors.right:      parent.right
            anchors.margins:    ScreenTools.defaultFontPixelHeight * 0.5
            height:             ScreenTools.isMobile ? ScreenTools.defaultFontPixelHeight * 1.5 : ScreenTools.defaultFontPixelHeight
            width:              height
            sourceSize.height:   height
            source:             "/res/TrashDelete.svg"
            fillMode:           Image.PreserveAspectFit
            mipmap:             true
            smooth:             true
            MouseArea {
                anchors.fill:   parent
                onClicked: {
                    if(QGroundControl.multiVehicleManager.activeVehicleAvailable) {
                        activeVehicle.clearMessages();
                        messageArea.close()
                    }
                }
            }
        }
    }

    //-------------------------------------------------------------------------
    //-- Critical Message Area
    Rectangle {
        id:                         criticalMmessageArea
        width:                      mainWindow.width  * 0.55
        height:                     Math.min(criticalMessageText.height + _textMargins * 2, ScreenTools.defaultFontPixelHeight * 6)
        color:                      qgcPal.alertBackground
        visible:                    false
        radius:                     ScreenTools.defaultFontPixelHeight * 0.5
        anchors.horizontalCenter:   parent.horizontalCenter
        anchors.top:                parent.top
        anchors.topMargin:          toolBar.height + ScreenTools.defaultFontPixelHeight / 2
        border.color:               qgcPal.alertBorder
        border.width:               2

        readonly property real _textMargins: ScreenTools.defaultFontPixelHeight

        function close() {
            //-- Are there messages in the waiting queue?
            if(mainWindow.messageQueue.length) {
                criticalMessageText.text = ""
                //-- Show all messages in queue
                for (var i = 0; i < mainWindow.messageQueue.length; i++) {
                    var text = mainWindow.messageQueue[i]
                    criticalMessageText.append(text)
                }
                //-- Clear it
                mainWindow.messageQueue = []
            } else {
                criticalMessageText.text = ""
                criticalMmessageArea.visible = false
            }
        }

        MouseArea {
            // This MouseArea prevents the Map below it from getting Mouse events. Without this
            // things like mousewheel will scroll the Flickable and then scroll the map as well.
            anchors.fill:       parent
            preventStealing:    true
            onWheel:            wheel.accepted = true
        }

        Flickable {
            id:                 criticalMessageFlick
            anchors.margins:    parent._textMargins
            anchors.fill:       parent
            contentHeight:      criticalMessageText.height
            contentWidth:       criticalMessageText.width
            boundsBehavior:     Flickable.StopAtBounds
            pixelAligned:       true
            clip:               true

            TextEdit {
                id:             criticalMessageText
                width:          criticalMmessageArea.width - criticalClose.width - (ScreenTools.defaultFontPixelHeight * 2)
                anchors.left:   parent.left
                readOnly:       true
                textFormat:     TextEdit.RichText
                font.pointSize: ScreenTools.defaultFontPointSize
                font.family:    ScreenTools.demiboldFontFamily
                wrapMode:       TextEdit.WordWrap
                color:          qgcPal.alertText
            }
        }

        //-- Dismiss Critical Message
        QGCColoredImage {
            id:                 criticalClose
            anchors.margins:    ScreenTools.defaultFontPixelHeight * 0.5
            anchors.top:        parent.top
            anchors.right:      parent.right
            width:              ScreenTools.isMobile ? ScreenTools.defaultFontPixelHeight * 1.5 : ScreenTools.defaultFontPixelHeight
            height:             width
            sourceSize.height:  width
            source:             "/res/XDelete.svg"
            fillMode:           Image.PreserveAspectFit
            color:              qgcPal.alertText
            MouseArea {
                anchors.fill:       parent
                anchors.margins:    ScreenTools.isMobile ? -ScreenTools.defaultFontPixelHeight : 0
                onClicked: {
                    criticalMmessageArea.close()
                }
            }
        }

        //-- More text below indicator
        QGCColoredImage {
            anchors.margins:    ScreenTools.defaultFontPixelHeight * 0.5
            anchors.bottom:     parent.bottom
            anchors.right:      parent.right
            width:              ScreenTools.isMobile ? ScreenTools.defaultFontPixelHeight * 1.5 : ScreenTools.defaultFontPixelHeight
            height:             width
            sourceSize.height:  width
            source:             "/res/ArrowDown.svg"
            fillMode:           Image.PreserveAspectFit
            visible:            criticalMessageText.lineCount > 5
            color:              qgcPal.alertText
            MouseArea {
                anchors.fill:   parent
                onClicked: {
                    criticalMessageFlick.flick(0,-500)
                }
            }
        }
    }

    //-------------------------------------------------------------------------
    //-- Loader helper for any child, no matter how deep can display an element
    //   in the middle of the main window.
    Loader {
        id:         rootLoader
        anchors.centerIn: parent
    }

}