import QtQuick 2.13
import QtQuick.Controls 2.13
import QtQuick.Layouts 1.13
import QtWebEngine 1.10
import QtWebChannel 1.13
import Qt.labs.settings 1.0
import QtQuick.Controls.Styles 1.0
import QtQuick.Dialogs 1.2

import StatusQ.Core 0.1
import StatusQ.Layout 0.1

import utils 1.0
import shared.controls 1.0
import shared 1.0
import shared.status 1.0
import shared.popups 1.0

import "popups"
import "controls"
import "views"
import "panels"
import "stores"

// Code based on https://code.qt.io/cgit/qt/qtwebengine.git/tree/examples/webengine/quicknanobrowser/BrowserWindow.qml?h=5.15
// Licensed under BSD

StatusSectionLayout {
    id: root

    property var globalStore
    property var sendTransactionModal

    function openUrlInNewTab(url) {
        var tab = _internal.addNewTab()
        tab.item.url = _internal.determineRealURL(url)
    }

    notificationCount: activityCenterStore.unreadNotificationsCount
    hasUnseenNotifications: activityCenterStore.hasUnseenNotifications
    onNotificationButtonClicked: Global.openActivityCenterPopup()

    QtObject {
        id: _internal

        property Item currentWebView: tabs.currentIndex < tabs.count ? tabs.getTab(tabs.currentIndex).item : null

        property Component browserDialogComponent: BrowserDialog {
            onClosing: destroy()
        }

        property Component jsDialogComponent: JSDialogWindow {}

        property Component accessDialogComponent: BrowserConnectionModal {
            currentTab: tabs.getTab(tabs.currentIndex) && tabs.getTab(tabs.currentIndex).item
            parent: browserWindow
            x: browserWindow.width - width - Style.current.halfPadding
            y: browserWindow.y + browserHeader.height + Style.current.halfPadding
            web3Response: function(message) {
                provider.web3Response(message)
            }
        }

        property Component sendTransactionModalComponent: SendModal {
            anchors.centerIn: parent
            selectedAccount: WalletStore.dappBrowserAccount
            preSelectedAsset: store.getAsset(WalletStore.dappBrowserAccount.assets, "ETH")
        }

        property Component signMessageModalComponent: SignMessageModal {}

        property MessageDialog sendingError: MessageDialog {
            title: qsTr("Error sending the transaction")
            icon: StandardIcon.Critical
            standardButtons: StandardButton.Ok
        }

        property MessageDialog signingError: MessageDialog {
            title: qsTr("Error signing message")
            icon: StandardIcon.Critical
            standardButtons: StandardButton.Ok
        }

        property QtObject defaultProfile: WebEngineProfile {
            storageName: "Profile"
            offTheRecord: false
            httpUserAgent: {
                if (localAccountSensitiveSettings.compatibilityMode) {
                    // Google doesn't let you connect if the user agent is Chrome-ish and doesn't satisfy some sort of hidden requirement
                    return "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:81.0) Gecko/20100101 Firefox/81.0"
                }
                return ""
            }
            useForGlobalCertificateVerification: true
            userScripts: [
                WebEngineScript {
                    injectionPoint: WebEngineScript.DocumentCreation
                    sourceUrl:  Qt.resolvedUrl("./helpers/provider.js")
                    worldId: WebEngineScript.MainWorld // TODO: check https://doc.qt.io/qt-5/qml-qtwebengine-webenginescript.html#worldId-prop
                }
            ]
        }

        property QtObject otrProfile: WebEngineProfile {
            offTheRecord: true
            persistentCookiesPolicy:  WebEngineProfile.NoPersistentCookies
            httpUserAgent: _internal.defaultProfile.httpUserAgent
            userScripts: [
                WebEngineScript {
                    injectionPoint: WebEngineScript.DocumentCreation
                    sourceUrl:  Qt.resolvedUrl("./helpers/provider.js")
                    worldId: WebEngineScript.MainWorld // TODO: check https://doc.qt.io/qt-5/qml-qtwebengine-webenginescript.html#worldId-prop
                }
            ]
        }

        function addNewDownloadTab() {
            tabs.createDownloadTab(tabs.count !== 0 ? currentWebView.profile : defaultProfile);
            tabs.currentIndex = tabs.count - 1;
        }

        function addNewTab() {
            var tab = tabs.createEmptyTab(tabs.count !== 0 ? currentWebView.profile : defaultProfile);
            tabs.currentIndex = tabs.count - 1;
            browserHeader.addressBar.forceActiveFocus();
            browserHeader.addressBar.selectAll();

            return tab;
        }

        function onDownloadRequested(download) {
            downloadBar.isVisible = true
            download.accept();
            DownloadsStore.addDownload(download)
        }

        function determineRealURL(url) {
            return Web3ProviderStore.determineRealURL(url)
        }

        onCurrentWebViewChanged: {
            findBar.reset();
            browserHeader.addressBar.text = Web3ProviderStore.obtainAddress(currentWebView.url)
        }
    }

    centerPanel: Rectangle {
        id: browserWindow
        anchors.fill: parent
        color: Style.current.inputBackground

        WebProviderObj {
            id: provider
            createAccessDialogComponent: function() {
                return _internal.accessDialogComponent.createObject(root)
            }
            createSendTransactionModalComponent: function(request) {
                return _internal.sendTransactionModalComponent.createObject(root, {
                                                                                preSelectedRecipient: request.payload.params[0].to,
                                                                                preDefinedAmountToSend: LocaleUtils.numberToLocaleString(RootStore.getWei2Eth(request.payload.params[0].value, 18)),
                                                                            })
            }
            createSignMessageModalComponent: function(request) {
                return _internal.signMessageModalComponent.createObject(root, {
                                                                            request,
                                                                            selectedAccount: {
                                                                                name: WalletStore.dappBrowserAccount.name,
                                                                                iconColor: Utils.getColorForId(WalletStore.dappBrowserAccount.colorId)
                                                                            }
                                                                        })
            }
            showSendingError: function(message) {
                _internal.sendingError.text = message
                return _internal.sendingError.open()
            }
            showSigningError: function(message) {
                _internal.signingError.text = message
                return _internal.signingError.open()
            }
            showToastMessage: function(result, chainId) {
                let url =  "%1/%2".arg(WalletStore.getEtherscanLink(chainId)).arg(result)
                Global.displayToastMessage(qsTr("Transaction pending..."),
                                           qsTr("View on etherscan"),
                                           "",
                                           true,
                                           Constants.ephemeralNotificationType.normal,
                                           url);
            }
        }

        BrowserShortcutActions {
            id: keyboardShortcutActions
            currentWebView: _internal.currentWebView
            findBarComponent: findBar
            browserHeaderComponent: browserHeader
            onAddNewDownloadTab: _internal.addNewDownloadTab()
            onRemoveView: tabs.removeView(tabs.currentIndex)
        }

        WebChannel {
            id: channel
            registeredObjects: [provider]
        }

        BrowserHeader {
            id: browserHeader
            property bool walletMenuPopupOpen: false

            anchors.top: parent.top
            anchors.topMargin: tabs.tabHeight + tabs.anchors.topMargin
            z: 52
            favoriteComponent: favoritesBar
            currentFavorite: _internal.currentWebView && BookmarksStore.getCurrentFavorite(_internal.currentWebView.url)
            dappBrowserAccName: WalletStore.dappBrowserAccount.name
            dappBrowserAccIcon: Utils.getColorForId(WalletStore.dappBrowserAccount.colorId)
            settingMenu: settingsMenu
            currentUrl: !!_internal.currentWebView ? _internal.currentWebView.url : ""
            isLoading: (!!_internal.currentWebView && _internal.currentWebView.loading)
            canGoBack: (!!_internal.currentWebView && _internal.currentWebView.canGoBack)
            canGoForward: (!!_internal.currentWebView && _internal.currentWebView.canGoForward)
            currentTabConnected: RootStore.currentTabConnected
            onOpenHistoryPopup: historyMenu.popup(xPos, yPos)
            onGoBack: _internal.currentWebView.goBack()
            onGoForward: _internal.currentWebView.goForward()
            onReload: _internal.currentWebView.reload()
            onStopLoading: _internal.currentWebView.stop()
            onAddNewFavoritelClicked: {
                Global.openPopup(addFavoriteModal,
                                 {
                                     x: xPos - 30,
                                     y: browserHeader.y + browserHeader.height + 4,
                                     modifiyModal: browserHeader.currentFavorite,
                                     toolbarMode: true,
                                     ogUrl: browserHeader.currentFavorite ? browserHeader.currentFavorite.url : _internal.currentWebView.url,
                                     ogName: browserHeader.currentFavorite ? browserHeader.currentFavorite.name : _internal.currentWebView.title
                                 })
            }
            onLaunchInBrowser: {
                // TODO: disable browsing local files?  file://
                if (localAccountSensitiveSettings.useBrowserEthereumExplorer !== Constants.browserEthereumExplorerNone && url.startsWith("0x")) {
                    _internal.currentWebView.url = RootStore.get0xFormedUrl(localAccountSensitiveSettings.useBrowserEthereumExplorer, url)
                    return
                }
                if (localAccountSensitiveSettings.shouldShowBrowserSearchEngine !== Constants.browserSearchEngineNone && !Utils.isURL(url) && !Utils.isURLWithOptionalProtocol(url)) {
                    _internal.currentWebView.url = RootStore.getFormedUrl(localAccountSensitiveSettings.shouldShowBrowserSearchEngine, url)
                    return
                } else if (Utils.isURLWithOptionalProtocol(url)) {
                    url = "https://" + url
                }
                _internal.currentWebView.url = _internal.determineRealURL(url);
            }
            onOpenWalletMenu: {
                walletMenuPopupOpen ? Global.closePopup() : Global.openPopup(browserWalletMenu);
                walletMenuPopupOpen = !walletMenuPopupOpen;
            }
        }

        BrowserTabView {
            id: tabs
            anchors.top: parent.top
            anchors.topMargin: Style.current.halfPadding
            anchors.bottom: devToolsView.top
            anchors.bottomMargin: browserHeader.height
            anchors.left: parent.left
            anchors.right: parent.right
            z: 50
            tabComponent: !!webEngineView ? webEngineView : null
            currentWebEngineProfile: _internal.currentWebView.profile
            determineRealURL: function(url) {
                return _internal.determineRealURL(url)
            }
            onOpenNewTabTriggered: _internal.addNewTab()
            Component.onCompleted: {
                _internal.defaultProfile.downloadRequested.connect(_internal.onDownloadRequested);
                _internal.otrProfile.downloadRequested.connect(_internal.onDownloadRequested);
                var tab = createEmptyTab(_internal.defaultProfile);
                // For Devs: Uncomment the next lien if you want to use the simpeldapp on first load
                // tab.item.url = Web3ProviderStore.determineRealURL("https://simpledapp.eth");
            }
        }

        ProgressBar {
            id: progressBar
            height: 3
            from: 0
            to: 100
            visible: value != 0 && value != 100
            value: (_internal.currentWebView && _internal.currentWebView.loadProgress < 100) ? _internal.currentWebView.loadProgress : 0
            anchors.bottom: parent.bottom
            anchors.bottomMargin: Style.current.padding
            anchors.right: parent.right
            anchors.rightMargin: Style.current.padding
        }

        WebEngineView {
            id: devToolsView
            visible: localAccountSensitiveSettings.devToolsEnabled
            height: visible ? 400 : 0
            inspectedView: visible && tabs.currentIndex < tabs.count ? tabs.getTab(tabs.currentIndex).item : null
            anchors.left: parent.left
            anchors.right: parent.right
            anchors.bottom: parent.bottom
            onNewViewRequested: function(request) {
                var tab = tabs.createEmptyTab(_internal.currentWebView.profile);
                tabs.currentIndex = tabs.count - 1;
                request.openIn(tab.item);
            }
            z: 100
        }

        FavoriteMenu {
            id: favoriteMenu
            openInNewTab: function (url) {
                root.openUrlInNewTab(url)
            }
            onEditFavoriteTriggered: {
                Global.openPopup(addFavoriteModal, {
                                     modifiyModal: true,
                                     ogUrl: favoriteMenu.currentFavorite ? favoriteMenu.currentFavorite.url : _internal.currentWebView.url,
                                     ogName: favoriteMenu.currentFavorite ? favoriteMenu.currentFavorite.name : _internal.currentWebView.title})
            }
        }
        DownloadBar {
            id: downloadBar
            anchors.bottom: parent.bottom
            z: 60
            downloadsModel: DownloadsStore.downloadModel
            downloadsMenu: downloadMenu
            onOpenDownloadClicked: {
                if (downloadComplete) {
                    return DownloadsStore.openFile(index)
                }
                DownloadsStore.openDirectory(index)
            }
            onAddNewDownloadTab: _internal.addNewDownloadTab()
        }

        FindBar {
            id: findBar
            visible: false
            anchors.right: parent.right
            anchors.top: browserHeader.bottom
            z: 60

            onFindNext: {
                if (text)
                    _internal.currentWebView && _internal.currentWebView.findText(text);
                else if (!visible)
                    visible = true;
            }
            onFindPrevious: {
                if (text)
                    _internal.currentWebView && _internal.currentWebView.findText(text, WebEngineView.FindBackward);
                else if (!visible)
                    visible = true;
            }
        }

        Rectangle {
            id: statusBubble
            color: "oldlace"
            property int padding: 8
            visible: false

            anchors.left: parent.left
            anchors.bottom: parent.bottom
            width: statusText.paintedWidth + padding
            height: statusText.paintedHeight + padding

            Text {
                id: statusText
                anchors.centerIn: statusBubble
                elide: Qt.ElideMiddle

                Timer {
                    id: hideStatusText
                    interval: 750
                    onTriggered: {
                        statusText.text = "";
                        statusBubble.visible = false;
                    }
                }
            }
        }

        DownloadMenu {
            id: downloadMenu
        }

        BrowserSettingsMenu {
            id: settingsMenu
            x: parent.width - width
            y: browserHeader.y + (localAccountSensitiveSettings.shouldShowFavoritesBar ? browserHeader.height - 38 : browserHeader.height)
            isIncognito: _internal.currentWebView && _internal.currentWebView.profile === _internal.otrProfile
            onAddNewTab: _internal.addNewTab()
            onGoIncognito: {
                if (_internal.currentWebView) {
                    _internal.currentWebView.profile = checked ? _internal.otrProfile : _internal.defaultProfile;
                }
            }
            onZoomIn: {
                const newZoom = _internal.currentWebView.zoomFactor + 0.1
                _internal.currentWebView.changeZoomFactor(newZoom)
            }
            onZoomOut: {
                const newZoom = currentWebView.zoomFactor - 0.1
                _internal.currentWebView.changeZoomFactor(newZoom)
            }
            onChangeZoomFactor: _internal.currentWebView.changeZoomFactor(1.0)
            onLaunchFindBar: {
                if (!findBar.visible) {
                    findBar.visible = true;
                    findBar.forceActiveFocus()
                }
            }
            onToggleCompatibilityMode: {
                for (let i = 0; i < tabs.count; ++i){
                    tabs.getTab(i).item.stop() // Stop all loading tabs
                }

                localAccountSensitiveSettings.compatibilityMode = checked;

                for (let i = 0; i < tabs.count; ++i){
                    tabs.getTab(i).item.reload() // Reload them with new user agent
                }
            }
            onLaunchBrowserSettings: {
                Global.changeAppSectionBySectionType(Constants.appSection.profile, Constants.settingsSubsection.browserSettings);
            }
        }
        Component  {
            id: browserWalletMenu
            BrowserWalletMenu {
                property point headerPoint: Qt.point(browserHeader.x, browserHeader.y)
                x: (parent.width - width - Style.current.halfPadding)
                y: (Math.abs(browserHeader.mapFromGlobal(headerPoint).y) +
                    browserHeader.anchors.topMargin + Style.current.halfPadding)
                onSendTriggered: {
                    sendTransactionModal.selectedAccount = selectedAccount
                    sendTransactionModal.open()
                }
                onReload: {
                    for (let i = 0; i < tabs.count; ++i){
                        tabs.getTab(i).item.reload();
                    }
                }
                onDisconnect: {
                    Web3ProviderStore.disconnect(Utils.getHostname(browserHeader.addressBar.text))
                    provider.postMessage("web3-disconnect-account", "{}");
                    _internal.currentWebView.reload()
                    close()
                }
                Component.onDestruction: {
                    if (browserHeader.walletMenuPopupOpen)
                        browserHeader.walletMenuPopupOpen = false;
                }
            }
        }
    }

    Component {
        id: addFavoriteModal
        AddFavoriteModal {}
    }

    MessageDialog {
        id: sslDialog

        property var certErrors: []
        icon: StandardIcon.Warning
        standardButtons: StandardButton.No | StandardButton.Yes
        title: qsTr("Server's certificate not trusted")
        text: qsTr("Do you wish to continue?")
        detailedText: qsTr("If you wish so, you may continue with an unverified certificate. Accepting an unverified certificate means you may not be connected with the host you tried to connect to.\nDo you wish to override the security check and continue?")
        onYes: {
            certErrors.shift().ignoreCertificateError();
            presentError();
        }
        onNo: reject()
        onRejected: reject()

        function reject(){
            certErrors.shift().rejectCertificate();
            presentError();
        }
        function enqueue(error){
            certErrors.push(error);
            presentError();
        }
        function presentError(){
            visible = certErrors.length > 0
        }
    }

    Menu {
        id: historyMenu
        Instantiator {
            model: _internal.currentWebView && _internal.currentWebView.navigationHistory.items
            MenuItem {
                text: model.title
                onTriggered: _internal.currentWebView.goBackOrForward(model.offset)
                checkable: !enabled
                checked: !enabled
                enabled: model.offset
            }
            onObjectAdded: function(index, object) {
                historyMenu.insertItem(index, object)
            }
            onObjectRemoved: function(index, object) {
                historyMenu.removeItem(object)
            }
        }
    }

    Component {
        id: favoritesBar
        FavoritesBar {
            bookmarkModel: BookmarksStore.bookmarksModel
            favoritesMenu: favoriteMenu
            setAsCurrentWebUrl:  function(url) {
                _internal.currentWebView.url = _internal.determineRealURL(url)
            }
            addFavModal: function() {
                Global.openPopup(addFavoriteModal, {toolbarMode: true,
                                     ogUrl: browserHeader.currentFavorite ? browserHeader.currentFavorite.url : _internal.currentWebView.url,
                                     ogName: browserHeader.currentFavorite ? browserHeader.currentFavorite.name : _internal.currentWebView.title})
            }
        }
    }

    Component {
        id: webEngineView
        BrowserWebEngineView {
            anchors.top: parent.top
            anchors.topMargin: browserHeader.height
            currentWebView: _internal.currentWebView
            webChannel: channel
            findBarComp: findBar
            favMenu: favoriteMenu
            addFavModal: addFavoriteModal
            downloadsMenu: downloadMenu
            determineRealURLFn: function(url) {
                return _internal.determineRealURL(url)
            }
            onLinkHovered: function(hoveredUrl) {
                if (hoveredUrl === "")
                    hideStatusText.start();
                else {
                    statusText.text = hoveredUrl;
                    statusBubble.visible = true;
                    hideStatusText.stop();
                }
            }
            onSetCurrentWebUrl: {
                _internal.currentWebView.url = url
            }
            onWindowCloseRequested: tabs.removeView(tabs.indexOfView(webEngineView))
            onNewViewRequested: function(request) {
                if (!request.userInitiated) {
                    print("Warning: Blocked a popup window.");
                } else if (request.destination === WebEngineView.NewViewInTab) {
                    var tab = tabs.createEmptyTab(_internal.currentWebView.profile);
                    tabs.currentIndex = tabs.count - 1;
                    request.openIn(tab.item);
                } else if (request.destination === WebEngineView.NewViewInBackgroundTab) {
                    var backgroundTab = tabs.createEmptyTab(_internal.currentWebView.profile);
                    request.openIn(backgroundTab.item);
                    // Disabling popups temporarily since we need to set that webengineview settings / channel and other properties
                    /*} else if (request.destination === WebEngineView.NewViewInDialog) {
                var dialog = browserDialogComponent.createObject();
                dialog.currentWebView.profile = currentWebView.profile;
                dialog.currentWebView.webChannel = channel;
                request.openIn(dialog.currentWebView);*/
                } else {
                    // Instead of opening a new window, we open a new tab
                    // TODO: remove "open in new window" from context menu
                    var tab = tabs.createEmptyTab(_internal.currentWebView.profile);
                    tabs.currentIndex = tabs.count - 1;
                    request.openIn(tab.item);
                }
            }
            onCertificateError: function(error) {
                error.defer();
                sslDialog.enqueue(error);
            }
            onJavaScriptDialogRequested: function(request) {
                request.accepted = true;
                var dialog = _internal.jsDialogComponent.createObject(root, {"request": request});
                dialog.open();
            }
        }
    }

    Connections {
        target: _internal.currentWebView
        function onUrlChanged() {
            browserHeader.addressBar.text = Web3ProviderStore.obtainAddress(_internal.currentWebView.url)
            RootStore.currentTabConnected = Web3ProviderStore.hasWalletConnected(Utils.getHostname(_internal.currentWebView.url))
        }
    }

    Connections {
        target: BookmarksStore.bookmarksModel
        function onModelChanged() {
            browserHeader.currentFavorite = Qt.binding(function () {return BookmarksStore.getCurrentFavorite(_internal.currentWebView.url)})
        }
    }

    Connections {
        target: browserSection
        function onOpenUrl(url: string) {
            root.openUrlInNewTab(url);
        }
    }
}