// SPDX-FileCopyrightText: Nheko Contributors
//
// SPDX-License-Identifier: GPL-3.0-or-later

import "./components"
import "./delegates"
import "./emoji"
import "./ui"
import "./dialogs"
import Qt.labs.platform 1.1 as Platform
import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Layouts 1.2
import QtQuick.Window 2.13
import im.nheko 1.0

Item {
    id: chatRoot

    property int availableWidth: width
    property int padding: Nheko.paddingMedium
    property string searchString: ""
    property Room roommodel: room

    // HACK: https://bugreports.qt.io/browse/QTBUG-83972, qtwayland cannot auto hide menu
    Connections {
        function onHideMenu() {
            messageContextMenuC.close();
            replyContextMenu.close();
        }

        target: MainWindow
    }
    ScrollBar {
        id: scrollbar

        anchors.bottom: parent.bottom
        anchors.right: parent.right
        anchors.top: parent.top
        parent: chat.parent
    }
    ListView {
        id: chat

        property int delegateMaxWidth: ((Settings.timelineMaxWidth > 100 && Settings.timelineMaxWidth < chatRoot.availableWidth) ? Settings.timelineMaxWidth : chatRoot.availableWidth) - chatRoot.padding * 2 - (scrollbar.interactive ? scrollbar.width : 0)
        readonly property alias filteringInProgress: filteredTimeline.filteringInProgress

        ScrollBar.vertical: scrollbar
        anchors.fill: parent
        anchors.rightMargin: scrollbar.interactive ? scrollbar.width : 0
        // reuseItems still has a few bugs, see https://bugreports.qt.io/browse/QTBUG-95105 https://bugreports.qt.io/browse/QTBUG-95107
        //onModelChanged: if (room) room.sendReset()
        //reuseItems: true
        boundsBehavior: Flickable.StopAtBounds
        displayMarginBeginning: height / 4
        displayMarginEnd: height / 4
        model: (filteredTimeline.filterByThread || filteredTimeline.filterByContent) ? filteredTimeline : room
        //pixelAligned: true
        spacing: 2
        verticalLayoutDirection: ListView.BottomToTop

        delegate: TimelineDefaultMessageStyle {
            messageActions: messageActionsC
            messageContextMenu: messageContextMenuC
            scrolledToThis: eventId === room.scrollTarget && (y + height > chat.y + chat.contentY && y < chat.y + chat.height + chat.contentY)
        }
        footer: Item {
            anchors.horizontalCenter: parent.horizontalCenter
            anchors.margins: Nheko.paddingLarge
            // hacky, but works
            height: loadingSpinner.height + 2 * Nheko.paddingLarge
            visible: (room && room.paginationInProgress) || chat.filteringInProgress

            Spinner {
                id: loadingSpinner

                anchors.centerIn: parent
                anchors.margins: Nheko.paddingLarge
                foreground: palette.mid
                running: (room && room.paginationInProgress) || chat.filteringInProgress
                z: 3
            }
        }

        Window.onActiveChanged: readTimer.running = Window.active
        onCountChanged: {
            // Mark timeline as read
            if (atYEnd && room)
                model.currentIndex = 0;
        }

        TimelineFilter {
            id: filteredTimeline

            filterByContent: chatRoot.searchString
            filterByThread: room ? room.thread : ""
            source: room
        }
        Control {
            id: messageActionsC

            property Item attached: null
            // use comma to update on scroll
            property alias model: row.model

            hoverEnabled: true
            padding: Nheko.paddingSmall
            visible: Settings.buttonsInTimeline && !!attached && (attached.hovered || hovered)
            z: 10
            parent: chat.contentItem
            anchors.bottom: attached?.top
            anchors.right: attached?.right

            background: Rectangle {
                border.color: palette.buttonText
                border.width: 1
                color: palette.window
                radius: padding
            }
            contentItem: RowLayout {
                id: row

                property var model

                spacing: messageActionsC.padding

                Repeater {
                    model: Settings.recentReactions
                    visible: room ? room.permissions.canSend(MtxEvent.Reaction) : false

                    delegate: AbstractButton {
                        id: button

                        property color buttonTextColor: palette.buttonText
                        property color highlightColor: palette.highlight
                        required property string modelData
                        property bool showImage: modelData.startsWith("mxc://")

                        //Layout.preferredHeight: fontMetrics.height
                        Layout.alignment: Qt.AlignBottom
                        focusPolicy: Qt.NoFocus
                        height: showImage ? 16 : buttonText.implicitHeight
                        implicitHeight: showImage ? 16 : buttonText.implicitHeight
                        implicitWidth: showImage ? 16 : buttonText.implicitWidth
                        width: showImage ? 16 : buttonText.implicitWidth

                        onClicked: {
                            room.input.reaction(row.model.eventId, modelData);
                            TimelineManager.focusMessageInput();
                        }

                        Label {
                            id: buttonText

                            anchors.centerIn: parent
                            color: button.hovered ? button.highlightColor : button.buttonTextColor
                            font.family: Settings.emojiFont
                            horizontalAlignment: Text.AlignHCenter
                            padding: 0
                            text: button.modelData
                            verticalAlignment: Text.AlignVCenter
                            visible: !button.showImage
                        }
                        Image {
                            id: buttonImg

                            // Workaround, can't get icon.source working for now...
                            anchors.fill: parent
                            fillMode: Image.PreserveAspectFit
                            source: button.showImage ? (button.modelData.replace("mxc://", "image://MxcImage/") + "?scale") : ""
                            sourceSize.height: button.height
                            sourceSize.width: button.width
                        }
                        NhekoCursorShape {
                            anchors.fill: parent
                            cursorShape: Qt.PointingHandCursor
                        }
                        Ripple {
                            color: Qt.rgba(buttonTextColor.r, buttonTextColor.g, buttonTextColor.b, 0.5)
                        }
                    }
                }
                ImageButton {
                    ToolTip.delay: Nheko.tooltipDelay
                    ToolTip.text: qsTr("Edit")
                    ToolTip.visible: hovered
                    buttonTextColor: palette.buttonText
                    hoverEnabled: true
                    image: ":/icons/icons/ui/edit.svg"
                    visible: !!row.model && row.model.isEditable
                    width: 16

                    onClicked: {
                        if (row.model.isEditable)
                            room.edit = row.model.eventId;
                    }
                }
                ImageButton {
                    id: reactButton

                    ToolTip.delay: Nheko.tooltipDelay
                    ToolTip.text: qsTr("React")
                    ToolTip.visible: hovered
                    hoverEnabled: true
                    image: ":/icons/icons/ui/smile-add.svg"
                    visible: room ? room.permissions.canSend(MtxEvent.Reaction) : false
                    width: 16

                    onClicked: emojiPopup.visible ? emojiPopup.close() : emojiPopup.show(reactButton, room.roomId, function (plaintext, markdown) {
                            var event_id = row.model ? row.model.eventId : "";
                            room.input.reaction(event_id, plaintext);
                            TimelineManager.focusMessageInput();
                        })
                }
                ImageButton {
                    ToolTip.delay: Nheko.tooltipDelay
                    ToolTip.text: (row.model && row.model.threadId) ? qsTr("Reply in thread") : qsTr("New thread")
                    ToolTip.visible: hovered
                    hoverEnabled: true
                    image: (row.model && row.model.threadId) ? ":/icons/icons/ui/thread.svg" : ":/icons/icons/ui/new-thread.svg"
                    visible: room ? room.permissions.canSend(MtxEvent.TextMessage) : false
                    width: 16

                    onClicked: room.thread = (row.model.threadId || row.model.eventId)
                }
                ImageButton {
                    ToolTip.delay: Nheko.tooltipDelay
                    ToolTip.text: qsTr("Reply")
                    ToolTip.visible: hovered
                    hoverEnabled: true
                    image: ":/icons/icons/ui/reply.svg"
                    visible: room ? room.permissions.canSend(MtxEvent.TextMessage) : false
                    width: 16

                    onClicked: room.reply = row.model.eventId
                }
                ImageButton {
                    ToolTip.delay: Nheko.tooltipDelay
                    ToolTip.text: qsTr("Go to message")
                    ToolTip.visible: hovered
                    buttonTextColor: palette.buttonText
                    hoverEnabled: true
                    image: ":/icons/icons/ui/go-to.svg"
                    visible: !!row.model && filteredTimeline.filterByContent
                    width: 16

                    onClicked: {
                        topBar.searchString = "";
                        room.showEvent(row.model.eventId);
                    }
                }
                ImageButton {
                    id: optionsButton

                    ToolTip.delay: Nheko.tooltipDelay
                    ToolTip.text: qsTr("Options")
                    ToolTip.visible: hovered
                    hoverEnabled: true
                    image: ":/icons/icons/ui/options.svg"
                    width: 16

                    onClicked: messageContextMenuC.show(row.model.eventId, row.model.threadId, row.model.type, row.model.isSender, row.model.isEncrypted, row.model.isEditable, "", row.model.body, optionsButton)
                }
            }
        }
        Shortcut {
            sequence: StandardKey.MoveToPreviousPage

            onActivated: {
                chat.contentY = chat.contentY - chat.height * 0.9;
                chat.returnToBounds();
            }
        }
        Shortcut {
            sequence: StandardKey.MoveToNextPage

            onActivated: {
                chat.contentY = chat.contentY + chat.height * 0.9;
                chat.returnToBounds();
            }
        }
        Shortcut {
            sequence: StandardKey.Cancel

            onActivated: {
                if (room.input.uploads.length > 0)
                    room.input.declineUploads();
                else if (room.reply)
                    room.reply = undefined;
                else if (room.edit)
                    room.edit = undefined;
                else
                    room.thread = undefined;
                TimelineManager.focusMessageInput();
            }
        }

        // These shortcuts use the room timeline because switching to threads and out is annoying otherwise.
        // Better solution welcome.
        Shortcut {
            sequence: "Alt+Up"

            onActivated: room.reply = room.indexToId(room.reply ? room.idToIndex(room.reply) + 1 : 0)
        }
        Shortcut {
            sequence: "Alt+Down"

            onActivated: {
                var idx = room.reply ? room.idToIndex(room.reply) - 1 : -1;
                room.reply = idx >= 0 ? room.indexToId(idx) : null;
            }
        }
        Shortcut {
            sequence: "Alt+F"

            onActivated: {
                if (room.reply) {
                    var forwardMess = forwardCompleterComponent.createObject(timelineRoot);
                    forwardMess.setMessageEventId(room.reply);
                    forwardMess.open();
                    room.reply = null;
                    timelineRoot.destroyOnClose(forwardMess);
                }
            }
        }
        Shortcut {
            sequence: "Ctrl+E"

            onActivated: {
                room.edit = room.reply;
            }
        }
        Timer {
            id: readTimer

            interval: 1000

            // force current read index to update
            onTriggered: {
                if (room)
                    room.setCurrentIndex(room.currentIndex);
            }
        }
    }
    Platform.Menu {
        id: messageContextMenuC

        property string eventId
        property int eventType
        property bool isEditable
        property bool isEncrypted
        property bool isSender
        property string link
        property string text
        property string threadId

        function show(eventId_, threadId_, eventType_, isSender_, isEncrypted_, isEditable_, link_, text_, showAt_) {
            eventId = eventId_;
            threadId = threadId_;
            eventType = eventType_;
            isEncrypted = isEncrypted_;
            isEditable = isEditable_;
            isSender = isSender_;
            if (text_)
                text = text_;
            else
                text = "";
            if (link_)
                link = link_;
            else
                link = "";
            if (showAt_)
                open(showAt_);
            else
                open();
        }

        Component {
            id: removeReason

            InputDialog {
                id: removeReasonDialog

                property string eventId

                prompt: qsTr("Enter reason for removal or hit enter for no reason:")
                title: qsTr("Reason for removal")

                onAccepted: function (text) {
                    room.redactEvent(eventId, text);
                }
            }
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("Go to &message")
            visible: filteredTimeline.filterByContent

            onTriggered: function () {
                topBar.searchString = "";
                room.showEvent(messageContextMenuC.eventId);
            }
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("&Copy")
            visible: messageContextMenuC.text

            onTriggered: Clipboard.text = messageContextMenuC.text
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("Copy &link location")
            visible: messageContextMenuC.link

            onTriggered: Clipboard.text = messageContextMenuC.link
        }
        Platform.MenuItem {
            id: reactionOption

            text: qsTr("Re&act")
            visible: room ? room.permissions.canSend(MtxEvent.Reaction) : false

            onTriggered: emojiPopup.visible ? emojiPopup.close() : emojiPopup.show(null, room.roomId, function (plaintext, markdown) {
                    room.input.reaction(messageContextMenuC.eventId, plaintext);
                    TimelineManager.focusMessageInput();
                })
        }
        Platform.MenuItem {
            text: qsTr("Repl&y")
            visible: room ? room.permissions.canSend(MtxEvent.TextMessage) : false

            onTriggered: room.reply = (messageContextMenuC.eventId)
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("&Edit")
            visible: messageContextMenuC.isEditable && (room ? room.permissions.canSend(MtxEvent.TextMessage) : false)

            onTriggered: room.edit = (messageContextMenuC.eventId)
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("&Thread")
            visible: (room ? room.permissions.canSend(MtxEvent.TextMessage) : false)

            onTriggered: room.thread = (messageContextMenuC.threadId || messageContextMenuC.eventId)
        }
        Platform.MenuItem {
            enabled: visible
            text: visible && room.pinnedMessages.includes(messageContextMenuC.eventId) ? qsTr("Un&pin") : qsTr("&Pin")
            visible: (room ? room.permissions.canChange(MtxEvent.PinnedEvents) : false)

            onTriggered: visible && room.pinnedMessages.includes(messageContextMenuC.eventId) ? room.unpin(messageContextMenuC.eventId) : room.pin(messageContextMenuC.eventId)
        }
        Platform.MenuItem {
            text: qsTr("&Read receipts")

            onTriggered: room.showReadReceipts(messageContextMenuC.eventId)
        }
        Platform.MenuItem {
            text: qsTr("&Forward")
            visible: messageContextMenuC.eventType == MtxEvent.ImageMessage || messageContextMenuC.eventType == MtxEvent.VideoMessage || messageContextMenuC.eventType == MtxEvent.AudioMessage || messageContextMenuC.eventType == MtxEvent.FileMessage || messageContextMenuC.eventType == MtxEvent.Sticker || messageContextMenuC.eventType == MtxEvent.TextMessage || messageContextMenuC.eventType == MtxEvent.LocationMessage || messageContextMenuC.eventType == MtxEvent.EmoteMessage || messageContextMenuC.eventType == MtxEvent.NoticeMessage

            onTriggered: {
                var forwardMess = forwardCompleterComponent.createObject(timelineRoot);
                forwardMess.setMessageEventId(messageContextMenuC.eventId);
                forwardMess.open();
                timelineRoot.destroyOnClose(forwardMess);
            }
        }
        Platform.MenuItem {
            text: qsTr("&Mark as read")
        }
        Platform.MenuItem {
            text: qsTr("View raw message")

            onTriggered: room.viewRawMessage(messageContextMenuC.eventId)
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("View decrypted raw message")
            // TODO(Nico): Fix this still being iterated over, when using keyboard to select options
            visible: messageContextMenuC.isEncrypted

            onTriggered: room.viewDecryptedRawMessage(messageContextMenuC.eventId)
        }
        Platform.MenuItem {
            text: qsTr("Remo&ve message")
            visible: (room ? room.permissions.canRedact() : false) || messageContextMenuC.isSender

            onTriggered: function () {
                var dialog = removeReason.createObject(timelineRoot);
                dialog.eventId = messageContextMenuC.eventId;
                dialog.show();
                dialog.forceActiveFocus();
                timelineRoot.destroyOnClose(dialog);
            }
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("&Save as")
            visible: messageContextMenuC.eventType == MtxEvent.ImageMessage || messageContextMenuC.eventType == MtxEvent.VideoMessage || messageContextMenuC.eventType == MtxEvent.AudioMessage || messageContextMenuC.eventType == MtxEvent.FileMessage || messageContextMenuC.eventType == MtxEvent.Sticker

            onTriggered: room.saveMedia(messageContextMenuC.eventId)
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("&Open in external program")
            visible: messageContextMenuC.eventType == MtxEvent.ImageMessage || messageContextMenuC.eventType == MtxEvent.VideoMessage || messageContextMenuC.eventType == MtxEvent.AudioMessage || messageContextMenuC.eventType == MtxEvent.FileMessage || messageContextMenuC.eventType == MtxEvent.Sticker

            onTriggered: room.openMedia(messageContextMenuC.eventId)
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("Copy link to eve&nt")
            visible: messageContextMenuC.eventId

            onTriggered: room.copyLinkToEvent(messageContextMenuC.eventId)
        }
    }
    Component {
        id: forwardCompleterComponent

        ForwardCompleter {
        }
    }
    Platform.Menu {
        id: replyContextMenu

        property string eventId
        property string link
        property string text

        function show(text_, link_, eventId_) {
            text = text_;
            link = link_;
            eventId = eventId_;
            open();
        }

        Platform.MenuItem {
            enabled: visible
            text: qsTr("&Copy")
            visible: replyContextMenu.text

            onTriggered: Clipboard.text = replyContextMenu.text
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("Copy &link location")
            visible: replyContextMenu.link

            onTriggered: Clipboard.text = replyContextMenu.link
        }
        Platform.MenuItem {
            enabled: visible
            text: qsTr("&Go to quoted message")
            visible: true

            onTriggered: room.showEvent(replyContextMenu.eventId)
        }
    }
    RoundButton {
        id: toEndButton

        property int fullWidth: 40

        flat: true
        height: width
        hoverEnabled: true
        radius: width / 2
        width: 0

        background: Rectangle {
            border.color: toEndButton.hovered ? palette.highlight : palette.buttonText
            border.width: 1
            color: toEndButton.down ? palette.highlight : palette.button
            opacity: enabled ? 1 : 0.3
            radius: toEndButton.radius
        }
        states: [
            State {
                name: ""

                PropertyChanges {
                    target: toEndButton
                    width: 0
                }
            },
            State {
                name: "shown"
                when: !chat.atYEnd

                PropertyChanges {
                    target: toEndButton
                    width: toEndButton.fullWidth
                }
            }
        ]
        transitions: Transition {
            from: ""
            reversible: true
            to: "shown"

            SequentialAnimation {
                PauseAnimation {
                    duration: 500
                }
                PropertyAnimation {
                    duration: 200
                    easing.type: Easing.InOutQuad
                    properties: "width"
                    target: toEndButton
                }
            }
        }

        onClicked: function () {
            chat.positionViewAtBeginning();
            TimelineManager.focusMessageInput();
        }

        anchors {
            bottom: parent.bottom
            bottomMargin: Nheko.paddingMedium + (fullWidth - width) / 2
            right: scrollbar.left
            rightMargin: Nheko.paddingMedium + (fullWidth - width) / 2
        }
        Image {
            id: buttonImg

            anchors.fill: parent
            anchors.margins: Nheko.paddingMedium
            fillMode: Image.PreserveAspectFit
            source: "image://colorimage/:/icons/icons/ui/download.svg?" + (toEndButton.down ? palette.highlightedText : palette.buttonText)
        }
    }
}