// SPDX-License-Identifier: GPL-2.0
import QtQuick 2.6
import QtQuick.Controls 2.0
import QtQuick.Controls.Material 2.1
import QtQuick.Window 2.2
import QtQuick.Dialogs 1.2
import QtQuick.Layouts 1.2
import QtQuick.Window 2.2
import org.subsurfacedivelog.mobile 1.0
import org.kde.kirigami 2.4 as Kirigami
import QtGraphicalEffects 1.0
import QtQuick.Templates 2.0 as QtQuickTemplates

Kirigami.ApplicationWindow {
	id: rootItem
	title: qsTr("Subsurface-mobile")
	reachableModeEnabled: false // while it's a good idea, it seems to confuse more than help
	wideScreen: false // workaround for probably Kirigami bug. See commits.

	// ensure we get all information on screen rotation
	Screen.orientationUpdateMask: Qt.LandscapeOrientation | Qt.PortraitOrientation | Qt.InvertedLandscapeOrientation | Qt.InvertedPortraitOrientation

	// the documentation claims that the ApplicationWindow should pick up the font set on
	// the C++ side. But as a matter of fact, it doesn't, unless you add this line:
	font: Qt.application.font
	background: Rectangle { color: subsurfaceTheme.backgroundColor }

	// we want to use our own colors for Kirigami, so let's define our colorset
	Kirigami.Theme.inherit: false
	Kirigami.Theme.colorSet: Kirigami.Theme.Button
	Kirigami.Theme.backgroundColor: subsurfaceTheme.backgroundColor
	Kirigami.Theme.textColor: subsurfaceTheme.textColor

	// next setup the tab bar on top
	pageStack.globalToolBar.style: Kirigami.ApplicationHeaderStyle.Breadcrumb
	pageStack.globalToolBar.showNavigationButtons: (Kirigami.ApplicationHeaderStyle.ShowBackButton | Kirigami.ApplicationHeaderStyle.ShowForwardButton)
	pageStack.globalToolBar.minimumHeight: 0
	pageStack.globalToolBar.preferredHeight: Math.round(Kirigami.Units.gridUnit * (Qt.platform.os == "ios" ? 2 : 1.5))
	pageStack.globalToolBar.maximumHeight: Kirigami.Units.gridUnit * 2

	property alias notificationText: manager.notificationText
	property alias locationServiceEnabled: manager.locationServiceEnabled
	property alias pluggedInDeviceName: manager.pluggedInDeviceName
	property alias defaultCylinderIndex: settingsWindow.defaultCylinderIndex
	property bool filterToggle: false
	property string filterPattern: ""
	property int colWidth: undefined

	// signal that the profile (and possibly other code) listens to so they
	// can redraw if settings are changed
	signal settingsChanged()

	onNotificationTextChanged: {
		// once the app is fully initialized and the UI is running, we use passive
		// notifications to show the notification text, but during initialization
		// we instead dump the information into the textBlock below - and to make
		// this visually more useful we interpret a "\r" at the beginning of a notification
		// to mean that we want to simply over-write the last line, not create a new one
		if (initialized) {
			// make sure any old notification is hidden
			// hiding notifications is no longer supported????
			// hidePassiveNotification()
			if (notificationText !== "") {
				// there's a risk that we have a >5 second gap in update events;
				// still, keep the timeout at 5s to avoid odd unchanging notifications
				showPassiveNotification(notificationText, 5000)
			}
		} else {
			textBlock.text = textBlock.text + "\n" + notificationText
		}
	}
	visible: false

	BusyIndicator {
		id: busy
		running: false
		height: 6 * Kirigami.Units.gridUnit
		width: 6 * Kirigami.Units.gridUnit
		anchors.centerIn: parent
	}

	function showBusy(msg) {
		if (msg !== undefined && msg !== "")
			showPassiveNotification(msg, 15000) // show for 15 seconds
		busy.running = true
	}

	function hideBusy() {
		busy.running = false
		// hiding notifications is no longer supported???
		// hidePassiveNotification()
	}

	function returnTopPage() {
		for (var i=pageStack.depth; i>1; i--) {
			pageStack.pop()
		}
		if (pageStack.currentItem !== diveList) {
			showDiveList()
		}
		detailsWindow.endEditMode()
	}

	function scrollToTop() {
		diveList.scrollToTop()
	}

	function showPage(page) {
		if (page === statistics) {
			manager.appendTextToLog("switching to statistics page, clearing out stack")
			pageStack.clear()
		}
		if (pageStack.currentItem === statistics) {
			manager.appendTextToLog("switching away from statistics page, clearing out stack")
			pageStack.clear()
		}

		if (page !== mapPage)
			hackToOpenMap = 0 // we really want a different page
		if (globalDrawer.drawerOpen)
			globalDrawer.close()
		var i=pageIndex(page)
		if (i === -1)
			pageStack.push(page)
		else
			pageStack.currentIndex = i
		manager.appendTextToLog("switched to page " + page.title)
	}

	function showMap() {
		showPage(mapPage)
	}

	function showDiveList() {
		showPage(diveList)
	}

	function pageIndex(pageToFind) {
		if (pageStack.contentItem !== null) {
			for (var i = 0; i < pageStack.contentItem.contentChildren.length; i++) {
				if (pageStack.contentItem.contentChildren[i] === pageToFind)
					return i
			}
		}
		return -1
	}

	function startAddDive() {
		detailsWindow.state = "add"
		detailsWindow.dive_id = manager.addDive();
		detailsWindow.number = manager.getNumber(detailsWindow.dive_id)
		detailsWindow.date = manager.getDate(detailsWindow.dive_id)
		detailsWindow.airtemp = ""
		detailsWindow.watertemp = ""
		detailsWindow.buddyModel = manager.buddyList
		detailsWindow.buddyIndex = -1
		detailsWindow.buddyText = ""
		detailsWindow.depth = ""
		detailsWindow.divemasterModel = manager.divemasterList
		detailsWindow.divemasterIndex = -1
		detailsWindow.divemasterText = ""
		detailsWindow.notes = ""
		detailsWindow.location = ""
		detailsWindow.gps = ""
		detailsWindow.duration = ""
		detailsWindow.suitModel = manager.suitList
		detailsWindow.suitIndex = -1
		detailsWindow.suitText = ""
		detailsWindow.cylinderModel0 = manager.cylinderInit
		detailsWindow.cylinderModel1 = manager.cylinderInit
		detailsWindow.cylinderModel2 = manager.cylinderInit
		detailsWindow.cylinderModel3 = manager.cylinderInit
		detailsWindow.cylinderModel4 = manager.cylinderInit
		detailsWindow.cylinderIndex0 = PrefEquipment.default_cylinder == "" ? -1 : detailsWindow.cylinderModel0.indexOf(PrefEquipment.default_cylinder)
		detailsWindow.usedCyl = ["",]
		detailsWindow.weight = ""
		detailsWindow.usedGas = []
		detailsWindow.startpressure = []
		detailsWindow.endpressure = []
		detailsWindow.gpsCheckbox = false
		showPage(detailsWindow)
	}

	contextDrawer: Kirigami.ContextDrawer {
		id: contextDrawer
		closePolicy: QtQuickTemplates.Popup.CloseOnPressOutside
	}

	globalDrawer: Kirigami.GlobalDrawer {
		id: globalDrawer
		height: rootItem.height
		rightPadding: 0
		enabled: (Backend.cloud_verification_status === Enums.CS_NOCLOUD ||
				  Backend.cloud_verification_status === Enums.CS_VERIFIED)
		topContent: Image {
			source: "qrc:/qml/icons/dive.jpg"
			// it's a 4x3 image, but clip if it takes too much space (making sure the text fits)
			property int myHeight: Math.min(Math.max(rootItem.height * 0.3, textblock.height + Kirigami.Units.largeSpacing), parent.width * 0.75)
			Layout.fillWidth: true
			Layout.maximumHeight: myHeight
			sourceSize.width: parent.width
			fillMode: Image.PreserveAspectCrop
			LinearGradient {
				anchors {
					left: parent.left
					right: parent.right
					top: parent.top
				}
				height: Math.min(textblock.height * 2, parent.myHeight)
				start: Qt.point(0, 0)
				end: Qt.point(0, height)
				gradient: Gradient {
					GradientStop {
						position: 0.0
						color: Qt.rgba(0, 0, 0, 0.8)
					}
					GradientStop {
						position: 1.0
						color: "transparent"
					}
				}
			}
			ColumnLayout {
				id: textblock
				anchors {
					left: parent.left
					top: parent.top
				}
				RowLayout {
					width: Math.min(implicitWidth, parent.width)
					Layout.margins: Kirigami.Units.smallSpacing
					Image {
						source: "qrc:/qml/subsurface-mobile-icon.png"
						fillMode: Image.PreserveAspectCrop
						sourceSize.width: Kirigami.Units.iconSizes.large
						width: Kirigami.Units.iconSizes.large
						Layout.margins: Kirigami.Units.smallSpacing
					}
					Kirigami.Heading {
						Layout.fillWidth: true
						visible: text.length > 0
						level: 1
						color: "white"
						text: "Subsurface"
						wrapMode: Text.NoWrap
						elide: Text.ElideRight
						font.weight: Font.Normal
						Layout.margins: Kirigami.Units.smallSpacing
					}
				}
				RowLayout {
					Layout.margins: Kirigami.Units.smallSpacing
					Kirigami.Heading {
						Layout.fillWidth: true
						visible: text.length > 0
						level: 3
						color: "white"
						text: PrefCloudStorage.cloud_storage_email
						wrapMode: Text.NoWrap
						elide: Text.ElideRight
						font.weight: Font.Normal
					}
				}
				RowLayout {
					Layout.leftMargin: Kirigami.Units.smallSpacing
					Layout.topMargin: 0
					Kirigami.Heading {
						Layout.fillWidth: true
						Layout.topMargin: 0
						visible: text.length > 0
						level: 5
						color: "white"
						text: manager.syncState
						wrapMode: Text.NoWrap
						elide: Text.ElideRight
						font.weight: Font.Normal
					}
				}
			}
		}

		resetMenuOnTriggered: false

		actions: [
			Kirigami.Action {
				icon {
					name: ":/icons/ic_home.svg"
				}
				text: qsTr("Dive list")
				onTriggered: {
					manager.appendTextToLog("requested dive list with credential status " + Backend.cloud_verification_status)
					returnTopPage()
					globalDrawer.close()
				}
			},
			Kirigami.Action {
				icon {
					name: ":/icons/ic_sync.svg"
				}
				text: qsTr("Dive management")
				Kirigami.Action {
					icon {
						name: ":/go-previous-symbolic"
					}
					text: qsTr("Back")
					onTriggered: globalDrawer.pop()
				}
				Kirigami.Action {
					icon {
						name: ":/icons/ic_add.svg"
					}
					text: qsTr("Add dive manually")
					onTriggered: {
						globalDrawer.close()
						returnTopPage()  // otherwise odd things happen with the page stack
						startAddDive()
					}
				}
				Kirigami.Action {
					// this of course assumes a white background - theming means this needs to change again
					icon {
						name: ":/icons/downloadDC-black.svg"
					}
					text: qsTr("Download from DC")
					enabled: true
					onTriggered: {
						globalDrawer.close()
						downloadFromDc.dcImportModel.clearTable()
						showPage(downloadFromDc)
					}
				}
				Kirigami.Action {
					icon {
						name: ":/icons/ic_add_location.svg"
					}
					text: qsTr("Apply GPS fixes")
					onTriggered: {
						globalDrawer.close()
						showBusy()
						diveList.diveListModel = null
						manager.applyGpsData()
						diveModel.resetInternalData()
						manager.refreshDiveList()
						while (pageStack.depth > 1) {
							pageStack.pop()
						}
						diveList.diveListModel = diveModel
						showDiveList()
						hideBusy()
					}
				}
				Kirigami.Action {
					icon {
						name: ":/icons/cloud_sync.svg"
					}
					text: qsTr("Manual sync with cloud")
					enabled: Backend.cloud_verification_status === Enums.CS_VERIFIED
					onTriggered: {
						globalDrawer.close()
						detailsWindow.endEditMode()
						manager.saveChangesCloud(true);
						globalDrawer.close()
					}
				}
				Kirigami.Action {
				icon {
					name: PrefCloudStorage.cloud_auto_sync ?  ":/icons/ic_cloud_off.svg" : ":/icons/ic_cloud_done.svg"
				}
				text: PrefCloudStorage.cloud_auto_sync ? qsTr("Disable auto cloud sync") : qsTr("Enable auto cloud sync")
					visible: Backend.cloud_verification_status !== Enums.CS_NOCLOUD
					onTriggered: {
						PrefCloudStorage.cloud_auto_sync = !PrefCloudStorage.cloud_auto_sync
						manager.setGitLocalOnly(PrefCloudStorage.cloud_auto_sync)
						if (!PrefCloudStorage.cloud_auto_sync) {
							showPassiveNotification(qsTr("Turning off automatic sync to cloud causes all data to only be \
stored locally. This can be very useful in situations with limited or no network access. Please choose 'Manual sync with cloud' \
if you have network connectivity and want to sync your data to cloud storage."), 10000)
						}
					}
				}
				Kirigami.Action {
					icon {
						name: ":/icons/sigma.svg"
					}
					text: qsTr("Dive summary")
					onTriggered: {
						globalDrawer.close()
						showPage(diveSummaryWindow)
						detailsWindow.endEditMode()
					}
				}
				Kirigami.Action {
					icon {
						name: ":/icons/ic_cloud_upload.svg"
					}
					text: qsTr("Export")
					onTriggered: {
						globalDrawer.close()
						showPage(exportWindow)
						detailsWindow.endEditMode()
					}
				}
			},
			Kirigami.Action {
				icon {
					name: ":/icons/map-globe.svg"
				}
				text: qsTr("Location")
				visible: true
				Kirigami.Action {
					icon {
						name: ":/go-previous-symbolic"
					}
					text: qsTr("Back")
					onTriggered: globalDrawer.pop()
				}
				Kirigami.Action {
					icon {
						name: ":/icons/map-globe.svg"
					}
					text: mapPage.title
					onTriggered: {
						showMap()
					}
				}
				Kirigami.Action {
					icon {
						name:":/icons/ic_gps_fixed.svg"
					}
					text: qsTr("Show GPS fixes")
					onTriggered: {
						globalDrawer.close()
						returnTopPage()
						manager.populateGpsData();
						showPage(gpsWindow)
					}
				}

				Kirigami.Action {
					icon {
						name: ":/icons/ic_clear.svg"
					}
					text: qsTr("Clear GPS cache")
					onTriggered: {
						globalDrawer.close();
						manager.clearGpsData();
					}
				}

				Kirigami.Action {
					icon {
						name: locationServiceEnabled ?  ":/icons/ic_location_off.svg" : ":/icons/ic_place.svg"
					}
					text: locationServiceEnabled ? qsTr("Disable background location service") : qsTr("Run background location service")
					onTriggered: {
						globalDrawer.close();
						locationServiceEnabled = !locationServiceEnabled
						if (locationServiceEnabled) {
							locationWarning.open()
						}

					}
				}
			},
			Kirigami.Action {
				icon {
					name: ":/icons/office-chart-bar-stacked.svg"
				}

				text: qsTr("Statistics")
				onTriggered: {
					showPage(statistics)
				}
			},
			Kirigami.Action {
				icon {
					name: ":/icons/ic_settings.svg"
				}
				text: qsTr("Settings")
				onTriggered: {
					globalDrawer.close()
					settingsWindow.defaultCylinderModel = manager.cylinderInit
					PrefEquipment.default_cylinder === "" ? defaultCylinderIndex = "-1" : defaultCylinderIndex = settingsWindow.defaultCylinderModel.indexOf(PrefEquipment.default_cylinder)
					showPage(settingsWindow)
					detailsWindow.endEditMode()
				}
			},
			Kirigami.Action {
				icon {
					name: ":/icons/ic_help_outline.svg"
				}
				text: qsTr("Help")
				Kirigami.Action {
					icon {
						name: ":/go-previous-symbolic"
					}
					text: qsTr("Back")
					onTriggered: globalDrawer.pop()
				}
				Kirigami.Action {
					icon {
						name: ":/icons/ic_info_outline.svg"
					}
					text: qsTr("About")
					onTriggered: {
						globalDrawer.close()
						showPage(aboutWindow)
						detailsWindow.endEditMode()
					}
				}
				Kirigami.Action {
					icon {
						name: ":/icons/ic_help_outline.svg"
					}
					text: qsTr("Show user manual")
					onTriggered: {
						Qt.openUrlExternally("https://subsurface-divelog.org/documentation/subsurface-mobile-v3-user-manual/")
					}
				}
				Kirigami.Action {
					icon {
						name: ":/icons/contact_support.svg"
					}
					text: qsTr("Ask for support")
					onTriggered: {
						if (!manager.createSupportEmail()) {
							manager.copyAppLogToClipboard()
							showPassiveNotification(qsTr("failed to open email client, please manually create support email to support@subsurface-divelog.org - the logs have been copied to the clipboard and can be pasted into that email."), 6000)
						} else {
							globalDrawer.close()
						}
					}
				}
				Kirigami.Action{
					icon {
						name: ":/icons/account_circle.svg"
					}
					text: qsTr("Reset forgotten Subsurface Cloud password")
					onTriggered: {
						Qt.openUrlExternally("https://cloud.subsurface-divelog.org/passwordreset")
						globalDrawer.close()
					}
				}
			},
			Kirigami.Action {
				icon {
					name: ":/icons/ic_adb.svg"
				}
				text: qsTr("Developer")
				visible: PrefDisplay.show_developer
				Kirigami.Action {
					icon {
						name: ":/go-previous-symbolic"
					}
					text: qsTr("Back")
					onTriggered: globalDrawer.pop()
				}
				Kirigami.Action {
					text: qsTr("App log")
					onTriggered: {
						globalDrawer.close()
						showPage(logWindow)
					}
				}
				Kirigami.Action {
					text: qsTr("Test busy indicator (toggle)")
					onTriggered: {
						if (busy.running) {
							hideBusy()
						} else {
							showBusy()
						}
					}
				}
				Kirigami.Action {
					text: qsTr("Test notification text")
					onTriggered: {
						showPassiveNotification(qsTr("Test notification text"), 5000)
					}
				}
				Kirigami.Action {
					text: qsTr("Theme information")
					onTriggered: {
						globalDrawer.close()
						showPage(themetest)
					}
				}

				Kirigami.Action {
					text: qsTr("Enable verbose logging (currently: %1)").arg(manager.verboseEnabled)
					onTriggered: {
						showPassiveNotification(qsTr("Not persistent"), 3000)
						globalDrawer.close()
						manager.verboseEnabled = true
					}
				}

				Kirigami.Action {
					text: qsTr("Access local cloud cache dirs")
					onTriggered: {
						globalDrawer.close()
						showPage(recoverCache)
					}
				}

				/* disable for now
				Kirigami.Action {
					text: qsTr("Dive planner")

					Kirigami.Action {
						icon {
							name: ":/go-previous-symbolic"
						}
						text: qsTr("Back")
						onTriggered: globalDrawer.pop()
					}
					Kirigami.Action {
						text: qsTr("Setup")
						onTriggered: {
							globalDrawer.close()
							pageStack.push(divePlannerSetupWindow)
						}
					}
					Kirigami.Action {
						text: qsTr("Edit")
						onTriggered: {
							globalDrawer.close()
							pageStack.push(divePlannerEditWindow)
						}
					}
					Kirigami.Action {
						text: qsTr("View")
						onTriggered: {
							globalDrawer.close()
							pageStack.push(divePlannerViewWindow)
						}
					}
					Kirigami.Action {
						text: qsTr("Manager")
						onTriggered: {
							globalDrawer.close()
							pageStack.push(divePlannerManagerWindow)
						}
					}
				}
				*/
			}
		] // end actions
		Row {
			spacing: Kirigami.Units.smallSpacing
			Image {
				id: ls_logo
				fillMode: Image.PreserveAspectFit
				source: "qrc:///icons/" + (subsurfaceTheme.currentTheme !== "" ? subsurfaceTheme.currentTheme : "Blue") + "_gps.svg"
				visible: locationServiceEnabled
			}
			Text {
				text: qsTr("Background location service active")
				color: subsurfaceTheme.textColor
				visible: locationServiceEnabled
				anchors.verticalCenter: ls_logo.verticalCenter
			}
		}
	}

	FontMetrics {
		id: fontMetrics
		font.pointSize: subsurfaceTheme.regularPointSize
	}

	function setupUnits() {
		// since Kirigami was initially instantiated, the font size may have
		// changed, so recalculate the gridUnit
		var kirigamiGridUnit = fontMetrics.height

		// some screens are too narrow for Subsurface-mobile to render well
		// things don't look greate with fewer than 21 gridUnits in a row
		var numColumns = Math.max(Math.floor(rootItem.width / (21 * kirigamiGridUnit)), 1)
		if (Screen.primaryOrientation === Qt.PortraitOrientation && PrefDisplay.singleColumnPortrait) {
			manager.appendTextToLog("show only one column in portrait mode");
			numColumns = 1;
		}
		rootItem.colWidth = numColumns > 1 ? Math.floor(rootItem.width / numColumns) : rootItem.width;

		// If we can't fit 21 gridUnits into a line, let the user know and suggest using a smaller font
		var widthInGridUnits = Math.floor(rootItem.colWidth / kirigamiGridUnit)
		if (widthInGridUnits < 21) {
			showPassiveNotification(qsTr("Font size likely too big for the display, switching to smaller font suggested"), 3000)
		}
		manager.appendTextToLog(numColumns + " columns with column width of " + rootItem.colWidth)
		manager.appendTextToLog("width in Grid Units " + widthInGridUnits + " original gridUnit " + Kirigami.Units.gridUnit + " now " + kirigamiGridUnit)
		if (Kirigami.Units.gridUnit !== kirigamiGridUnit) {
			// change our global grid unit and prevent Kirigami from resizing our rootItem
			var fixWidth = rootItem.width
			var fixHeight = rootItem.height
			Kirigami.Units.gridUnit = kirigamiGridUnit * 1.0
			rootItem.width = fixWidth
			rootItem.height = fixHeight
		}

		pageStack.defaultColumnWidth = rootItem.colWidth
		manager.appendTextToLog("Done setting up sizes width " + rootItem.width + " gridUnit " + kirigamiGridUnit)
	}

	QtObject {
		id: screenSizeObject

		property int initialWidth: rootItem.width
		property int initialHeight: rootItem.height
		property bool firstChange: true
		property int lastOrientation: undefined

		Component.onCompleted: {
			// break the binding
			initialWidth = initialWidth * 1
			manager.appendTextToLog("[screensetup] screenSizeObject constructor completed, initial width " + initialWidth)
			setupUnits()
		}
	}

	onWidthChanged: {
		manager.appendTextToLog("[screensetup] width changed now " + width + " x " + height + " vs screen " + Screen.width + " x " + Screen.height)

		if (screenSizeObject.lastOrientation === undefined) {
			manager.appendTextToLog("[screensetup] found initial orientation " + Screen.orientation)
			screenSizeObject.lastOrientation = Screen.orientation
		}
		manager.appendTextToLog("[screensetup] window width changed to " + width + " orientation " + Screen.orientation)
		// on Android devices we often get incorrect size updates during startup from Kirigami and we need to ignore those,
		// or more specifically, reset the Kirigami sizes when we notice them
		if (Screen.orientation === screenSizeObject.lastOrientation) {
			// not rotation
			if (width > Screen.width || height > Screen.height) {
				manager.appendTextToLog("[screensetup] received size update that exceeds screen size")
				if (screenSizeObject.initialWidth !== undefined) {
					manager.appendTextToLog("[screensetup] resetting to initial size " + screenSizeObject.initialWidth + " x " + screenSizeObject.initialHeight)
					rootItem.width = screenSizeObject.initialWidth
					rootItem.height = screenSizeObject.initialHeight
				} else {
					// we don't have a size that we believe, yet - using Screen size is almost certainly wrong
					manager.appendTextToLog("[screensetup] restricting to screen size " + Screen.width + " x " + Screen.height)
					rootItem.width = Screen.width
					rootItem.heigh = Screen.height
				}
			} else {
				// this could be a realistic size
				if (screenSizeObject.initialWidth !== undefined) {
					if (screenSizeObject.initialHeight < height) {
						manager.appendTextToLog("[screensetup] remembering better height")
						screenSizeObject.initialHeight = height
					}
					if (screenSizeObject.initialWidth < width) {
						manager.appendTextToLog("[screensetup] remembering better height")
						screenSizeObject.initialWidth = width
					}
					setupUnits()
				}
			}
		} else {
			manager.appendTextToLog("[screensetup] remembering new orientation")
			screenSizeObject.lastOrientation = Screen.orientation
		}
	}

	property int hackToOpenMap: 0 /* Otherpage */
	/* I really want an enum, but those are painful in QML, so let's use numbers
	 * 0 (Otherpage)   - the last page selected was a non-map page
	 * 1 (MapSelected) - the map page was selected by the user
	 * 2 (MapForced)   - the map page was forced by this hack
	 */

	pageStack.onCurrentItemChanged: {
		// This is called whenever the user navigates using the breadcrumbs in the header

		if (pageStack.currentItem === null) {
			manager.appendTextToLog("there's no current page")
		} else {
			// horrible, insane hack to make picking the mapPage work
			// for some reason I cannot figure out, whenever the mapPage is selected
			// we immediately switch back to the page before it - so force-prevent
			// that undersired behavior
			if (pageStack.currentItem.objectName === mapPage.objectName) {
				// remember that we actively picked the mapPage
				if (hackToOpenMap !== 2 /* MapForced */ ) {
					manager.appendTextToLog("pageStack switched to map")
					hackToOpenMap = 1 /* MapSelected */
				} else {
					manager.appendTextToLog("pageStack forced back to map")
				}
			} else if (pageStack.currentItem.objectName !== mapPage.objectName &&
					   pageStack.lastItem.objectName === mapPage.objectName &&
					   hackToOpenMap === 1 /* MapSelected */) {
				// if we just picked the mapPage and are suddenly back on a different page
				// force things back to the mapPage
				manager.appendTextToLog("pageStack wrong page, switching back to map")
				pageStack.currentIndex = pageStack.contentItem.contentChildren.length - 1
				hackToOpenMap = 2 /* MapForced */
			} else {
				// if we picked a different page reset the mapPage hack
				manager.appendTextToLog("pageStack switched to " + pageStack.currentItem.objectName)
				hackToOpenMap = 0 /* Otherpage */
			}

			// disable the left swipe to go back when on the map page
			pageStack.interactive = pageStack.currentItem.objectName !== mapPage.objectName

			// is there a better way to reload the map markers instead of doing that
			// every time the map page is shown - e.g. link to the dive list model somehow?
			if (pageStack.currentItem.objectName === mapPage.objectName)
				mapPage.reloadMap()

			// In case we land on any page, not being the DiveDetails (which can be
			// in multiple states, such as add, edit or view), just end the edit/add mode
			if (pageStack.currentItem.objectName !== "DiveDetails" &&
					(detailsWindow.state === 'edit' || detailsWindow.state === 'add')) {
				detailsWindow.endEditMode()
			}
		}
	}

	QMLManager {
		id: manager
	}

	property bool initialized: manager.initialized

	onInitializedChanged: {
		if (initialized) {
			hideBusy()
			manager.appendTextToLog("initialization completed - showing the dive list")
			showPage(diveList) // we want to make sure that gets on the stack
			diveList.diveListModel = diveModel

			if (Qt.platform.os === "android") {
				manager.appendTextToLog("if we got started by a plugged in device, switch to download page -- pluggedInDeviceName = " + pluggedInDeviceName)
				if (pluggedInDeviceName !== "")
					// if we were started with a dive computer plugged in,
					// immediately switch to download page
					showDownloadForPluggedInDevice()
			}
		}
	}

	Kirigami.OverlaySheet {
		id: locationWarning
		background: Rectangle { color: subsurfaceTheme.backgroundColor }
		ColumnLayout {
			width: locationWarning.width - Kirigami.Units.gridUnit
			spacing: Kirigami.Units.gridUnit
			TemplateTitle {
				Layout.alignment: Qt.AlignHCenter
				title: qsTr("Location Service Enabled")
			}
			Text {
				Layout.fillWidth: true
				wrapMode: Text.WrapAtWordBoundaryOrAnywhere
				color: subsurfaceTheme.textColor
				text: qsTr("This service collects location data to enable you to track the GPS coordinates of your dives. " +
					   "This will attempt to continue to collect location data, even if the app is closed or your phone screen locked.")
			}
			Text {
				Layout.fillWidth: true
				wrapMode: Text.WrapAtWordBoundaryOrAnywhere
				color: subsurfaceTheme.textColor
				text: qsTr("The location data are not used in any way, except when you apply the location data to the dives in your dive list on this device.")
			}
			Text {
				Layout.fillWidth: true
				wrapMode: Text.WrapAtWordBoundaryOrAnywhere
				color: subsurfaceTheme.textColor
				text: qsTr("By default, the location data are never transferred to the cloud or to any other service. However, in order to allow debugging " +
					   "of location data related issues, you can explicitly enable storing those location data in the cloud by enabling the corresponding option in the advanced settings.")
			}
			TemplateButton {
				Layout.alignment: Qt.AlignHCenter
				text: qsTr("Understood")
				onClicked: { locationWarning.close() }
			}
		}
	}

	Label {
		id: textBlock
		visible: !initialized
		color: subsurfaceTheme.textColor
		text: qsTr("Subsurface-mobile starting up")
		font.pointSize: subsurfaceTheme.headingPointSize
		topPadding: 2 * Kirigami.Units.gridUnit
		leftPadding: Kirigami.Units.gridUnit
	}

	StartPage {
		id: startPage
		anchors.fill: parent
		visible: initialized &&
			 Backend.cloud_verification_status !== Enums.CS_NOCLOUD &&
			 Backend.cloud_verification_status !== Enums.CS_VERIFIED
		onVisibleChanged: {
			manager.appendTextToLog("StartPage visibility changed to " + visible)
			if (!initialized) {
				manager.appendTextToLog("not yet initialized, show busy spinner")
				showBusy()
			}
			if (visible) {
				pageStack.clear()
			} else if (initialized) {
				showDiveList()
			}
		}
		Component.onCompleted: {
			if (Screen.manufacturer + " " + Screen.model + " " + Screen.name !== "  ")
				manager.appendTextToLog("Running on " + Screen.manufacturer + " " + Screen.model + " " + Screen.name)
			manager.appendTextToLog("StartPage completed -- initialized is " + initialized)
		}
	}

	DiveList {
		id: diveList
		visible: false
	}

	StatisticsPage {
		id: statistics
		visible: false
	}

	Settings {
		id: settingsWindow
	}

	CopySettings {
		id: settingsCopyWindow
		visible: false
	}

	About {
		id: aboutWindow
		visible: false
	}

	Export {
		id: exportWindow
		visible: false
	}

	DiveDetails {
		id: detailsWindow
		visible: false
	}

	TripDetails {
		id: tripEditWindow
		visible: false
	}

	Log {
		id: logWindow
		visible: false
	}

	GpsList {
		id: gpsWindow
		visible: false
	}

	DownloadFromDiveComputer {
		id: downloadFromDc
		visible: false
	}

	MapPage {
		id: mapPage
		visible: false
	}

	RecoverCache {
		id: recoverCache
		visible: false
	}

/* this shouldn't be exposed unless someone will finish the work
	DivePlannerSetup {
		id: divePlannerSetupWindow
		visible: false
	}

	DivePlannerEdit {
		id: divePlannerEditWindow
		visible: false
	}

	DivePlannerView {
		id: divePlannerViewWindow
		visible: false
	}

	DivePlannerManager {
		id: divePlannerManagerWindow
		visible: false
	}
 */
	DiveSummary {
		id: diveSummaryWindow
		visible: false
	}

	ThemeTest {
		id: themetest
		visible: false
	}

	function showDownloadPage(vendor, product, connection) {
		manager.appendTextToLog("show download page for " + vendor + " / " + product + " / " + connection)
		downloadFromDc.dcImportModel.clearTable()
		if (vendor !== undefined && product !== undefined && connection !== undefined) {
			downloadFromDc.setupUSB = true
			// set up the correct values on the download page
			// setting the currentIndex to -1, first, helps to ensure
			// that the comboBox does get updated in the UI
			if (vendor !== -1) {
				downloadFromDc.vendor = -1
				downloadFromDc.vendor = vendor
			}
			if (product !== -1) {
				downloadFromDc.product = -1
				downloadFromDc.product = product
			}
			if (connection !== -1) {
				downloadFromDc.connection = -1
				downloadFromDc.connection = connection
			}
		} else {
			downloadFromDc.setupUSB = false
		}

		showPage(downloadFromDc)
	}

	function showDownloadForPluggedInDevice() {
		// don't add this unless the dive list is already shown
		if (pageIndex(diveList) === -1)
			return
		manager.appendTextToLog("plugged in device name changed to " + pluggedInDeviceName)
		/* if we recognized the device, we'll pass in a triple of ComboBox indeces as "vendor;product;connection" */
		var vendorProductConnection = pluggedInDeviceName.split(';')
		if (vendorProductConnection.length === 3)
			showDownloadPage(vendorProductConnection[0], vendorProductConnection[1], vendorProductConnection[2])
		else
			showDownloadPage()
	}

	onPluggedInDeviceNameChanged: {
		if (detailsWindow.state === 'edit' || detailsWindow.state === 'add') {
			/* we're in the middle of editing / adding a dive */
			manager.appendTextToLog("Download page requested by Android Intent, but adding/editing dive; no action taken")
		} else {
			// we want to show the downloads page
			// note that if Subsurface-mobile was started because a USB device was plugged in, this is run too early;
			// we catch this in the function below and instead switch to the download page in the completion signal
			// handler for the startPage
			showDownloadForPluggedInDevice()
		}
	}
	onClosing: {
		// this duplicates the check that is already in the onBackRequested signal handler of the DiveList
		if (globalDrawer.visible) {
			globalDrawer.close()
			close.accepted = false
		}
		if (contextDrawer.visible) {
			contextDrawer.close()
			close.accepted = false
		}
	}
}