import QtQuick 2.12
import QtQuick.Controls 2.12
import QtQuick.Layouts 1.12
import QtQuick.Controls.Material 2.12

import Spectral.Component 2.0
import Spectral.Component.Emoji 2.0
import Spectral.Dialog 2.0
import Spectral.Effect 2.0
import Spectral.Setting 0.1

import Spectral 0.1

Control {
    property alias isReply: replyItem.visible
    property var replyUser
    property string replyEventID
    property string replyContent

    property alias isAutoCompleting: autoCompleteListView.visible
    property var autoCompleteModel
    property int autoCompleteBeginPosition
    property int autoCompleteEndPosition

    property bool hasAttachment: false
    property url attachmentPath

    id: root

    padding: 0

    background: Rectangle {
        color: MSettings.darkTheme ? "#303030" : "#fafafa"
        radius: 24

        layer.enabled: true
        layer.effect: ElevationEffect {
            elevation: 1
        }
    }

    contentItem: ColumnLayout {
        spacing: 0

        RowLayout {
            Layout.fillWidth: true
            Layout.margins: 8

            id: replyItem

            visible: false

            spacing: 8

            Avatar {
                Layout.preferredWidth: 32
                Layout.preferredHeight: 32
                Layout.alignment: Qt.AlignTop

                source: replyUser ? replyUser.avatarMediaId : ""
                hint: replyUser ? replyUser.displayName : "No name"
            }

            Label {
                Layout.fillWidth: true

                text: replyContent
                font.pixelSize: 14

                wrapMode: Label.Wrap
            }
        }

        EmojiPicker {
            Layout.fillWidth: true

            id: emojiPicker

            visible: false

            textArea: inputField
            emojiModel: EmojiModel { id: emojiModel }
        }

        ListView {
            Layout.fillWidth: true
            Layout.preferredHeight: 36
            Layout.margins: 8

            id: autoCompleteListView

            visible: false

            model: autoCompleteModel

            clip: true
            spacing: 4
            orientation: ListView.Horizontal
            highlightFollowsCurrentItem: true
            keyNavigationWraps: true

            delegate: Control {
                property string autoCompleteText: modelData.displayName || modelData.unicode
                property bool isEmoji: modelData.unicode != null
                readonly property bool highlighted: autoCompleteListView.currentIndex === index

                height: 36
                padding: 8

                background: Rectangle {
                    visible: !isEmoji
                    color: highlighted ? Material.accent : "transparent"
                    border.color: Material.accent
                    border.width: 2
                    radius: height / 2
                }

                contentItem: Row {
                    spacing: 4

                    Text {
                        width: 20
                        height: 20
                        visible: isEmoji
                        text: autoCompleteText
                        font.pixelSize: 24
                        font.family: "Emoji"
                        verticalAlignment: Text.AlignVCenter
                        horizontalAlignment: Text.AlignHCenter
                    }
                    Avatar {
                        width: 20
                        height: 20
                        visible: !isEmoji
                        source: modelData.avatarMediaId || null
                    }
                    Label {
                        height: parent.height
                        visible: !isEmoji
                        text: autoCompleteText
                        color: highlighted ? "white" : Material.accent
                        verticalAlignment: Text.AlignVCenter
                    }
                }

                MouseArea {
                    anchors.fill: parent
                    onClicked: {
                        autoCompleteListView.currentIndex = index
                        inputField.replaceAutoComplete(autoCompleteText)
                    }
                }
            }
        }

        Rectangle {
            Layout.fillWidth: true
            Layout.preferredHeight: 1
            Layout.leftMargin: 12
            Layout.rightMargin: 12

            visible: emojiPicker.visible || replyItem.visible || autoCompleteListView.visible

            color: MSettings.darkTheme ? "#424242" : "#e7ebeb"
        }

        RowLayout {
            Layout.fillWidth: true

            spacing: 0

            ToolButton {
                Layout.preferredWidth: 48
                Layout.preferredHeight: 48
                Layout.alignment: Qt.AlignBottom

                id: uploadButton
                visible: !isReply && !hasAttachment

                contentItem: MaterialIcon {
                    icon: "\ue226"
                }

                onClicked: attachDialog.open()

                BusyIndicator {
                    anchors.fill: parent

                    running: currentRoom && currentRoom.hasFileUploading
                }
            }

            ToolButton {
                Layout.preferredWidth: 48
                Layout.preferredHeight: 48
                Layout.alignment: Qt.AlignBottom

                id: cancelReplyButton

                visible: isReply

                contentItem: MaterialIcon {
                    icon: "\ue5cd"
                }

                onClicked: clearReply()
            }

            Control {
                Layout.margins: 6
                Layout.preferredHeight: 36
                Layout.alignment: Qt.AlignVCenter

                visible: hasAttachment

                rightPadding: 8

                background: Rectangle {
                    color: MPalette.accent
                    radius: height / 2
                    antialiasing: true
                }

                contentItem: RowLayout {
                    spacing: 0

                    ToolButton {
                        Layout.preferredWidth: height
                        Layout.fillHeight: true

                        id: cancelAttachmentButton

                        contentItem: MaterialIcon {
                            icon: "\ue5cd"
                            color: "white"
                            font.pixelSize: 18
                        }

                        onClicked: {
                            hasAttachment = false
                            attachmentPath = ""
                        }
                    }

                    Label {
                        Layout.alignment: Qt.AlignVCenter

                        text: attachmentPath != "" ? attachmentPath.toString().substring(attachmentPath.toString().lastIndexOf('/') + 1, attachmentPath.length) : ""
                        color: "white"
                    }
                }
            }

            TextArea {
                property real progress: 0

                Layout.fillWidth: true
                Layout.minimumHeight: 48

                id: inputField

                wrapMode: Text.Wrap
                placeholderText: "Send a Message"
                topPadding: 0
                bottomPadding: 0
                selectByMouse: true
                verticalAlignment: TextEdit.AlignVCenter

                text: currentRoom != null ? currentRoom.cachedInput : ""

                background: Item {}

                Rectangle {
                    width: currentRoom && currentRoom.hasFileUploading ? parent.width * currentRoom.fileUploadingProgress / 100 : 0
                    height: parent.height

                    opacity: 0.2
                    color: Material.accent
                }

                Timer {
                    id: timeoutTimer

                    repeat: false
                    interval: 2000
                    onTriggered: {
                        repeatTimer.stop()
                        currentRoom.sendTypingNotification(false)
                    }
                }

                Timer {
                    id: repeatTimer

                    repeat: true
                    interval: 5000
                    triggeredOnStart: true
                    onTriggered: currentRoom.sendTypingNotification(true)
                }

                Keys.onReturnPressed: {
                    if (event.modifiers & Qt.ShiftModifier) {
                        insert(cursorPosition, "\n")
                    } else if (text) {
                        postMessage(text)
                        text = ""
                        closeAll()
                    }
                }

                Keys.onEscapePressed: closeAll()

                Keys.onBacktabPressed: if (isAutoCompleting) autoCompleteListView.decrementCurrentIndex()

                Keys.onTabPressed: {
                    if (isAutoCompleting) {
                        autoCompleteListView.incrementCurrentIndex()
                    } else {
                        autoCompleteBeginPosition = text.substring(0, cursorPosition).lastIndexOf(" ") + 1
                        var autoCompletePrefix = text.substring(0, cursorPosition).split(" ").pop()
                        if (!autoCompletePrefix) return
                        if (autoCompletePrefix.startsWith(":")) {
                            autoCompleteBeginPosition = text.substring(0, cursorPosition).lastIndexOf(" ") + 1
                            autoCompleteModel = emojiModel.filterModel(autoCompletePrefix)
                            if (autoCompleteModel.length === 0) return
                            isAutoCompleting = true
                            autoCompleteEndPosition = cursorPosition
                        } else {
                            autoCompleteModel = currentRoom.getUsers(autoCompletePrefix)
                            if (autoCompleteModel.length === 0) return
                            isAutoCompleting = true
                            autoCompleteEndPosition = cursorPosition
                        }
                    }
                    replaceAutoComplete(autoCompleteListView.currentItem.autoCompleteText)
                }

                onTextChanged: {
                    timeoutTimer.restart()
                    repeatTimer.start()
                    currentRoom.cachedInput = text

                    if (cursorPosition !== autoCompleteBeginPosition && cursorPosition !== autoCompleteEndPosition) {
                        isAutoCompleting = false
                        autoCompleteListView.currentIndex = 0
                    }
                }

                function replaceAutoComplete(word) {
                    remove(autoCompleteBeginPosition, autoCompleteEndPosition)
                    autoCompleteEndPosition = autoCompleteBeginPosition + word.length
                    insert(cursorPosition, word)
                }

                function postMessage(text) {
                    if (text.trim().length === 0) { return }
                    if(!currentRoom) { return }

                    if (hasAttachment) {
                        currentRoom.uploadFile(attachmentPath, text)
                        clearAttachment()
                        return
                    }

                    var PREFIX_ME = '/me '
                    var PREFIX_NOTICE = '/notice '
                    var PREFIX_RAINBOW = '/rainbow '
                    var PREFIX_HTML = '/html '
                    var PREFIX_MARKDOWN = '/md '

                    if (isReply) {
                        currentRoom.sendReply(replyUser.id, replyEventID, replyContent, text)
                        return
                    }

                    if (text.indexOf(PREFIX_ME) === 0) {
                        text = text.substr(PREFIX_ME.length)
                        currentRoom.postMessage(text, RoomMessageEvent.Emote)
                        return
                    }
                    if (text.indexOf(PREFIX_NOTICE) === 0) {
                        text = text.substr(PREFIX_NOTICE.length)
                        currentRoom.postMessage(text, RoomMessageEvent.Notice)
                        return
                    }
                    if (text.indexOf(PREFIX_RAINBOW) === 0) {
                        text = text.substr(PREFIX_RAINBOW.length)

                        var parsedText = ""
                        var rainbowColor = ["#ff2b00", "#ff5500", "#ff8000", "#ffaa00", "#ffd500", "#ffff00", "#d4ff00", "#aaff00", "#80ff00", "#55ff00", "#2bff00", "#00ff00", "#00ff2b", "#00ff55", "#00ff80", "#00ffaa", "#00ffd5", "#00ffff", "#00d4ff", "#00aaff", "#007fff", "#0055ff", "#002bff", "#0000ff", "#2a00ff", "#5500ff", "#7f00ff", "#aa00ff", "#d400ff", "#ff00ff", "#ff00d4", "#ff00aa", "#ff0080", "#ff0055", "#ff002b", "#ff0000"]
                        for (var i = 0; i < text.length; i++) {
                            parsedText = parsedText + "<font color='" + rainbowColor[i % rainbowColor.length] + "'>" + text.charAt(i) + "</font>"
                        }
                        currentRoom.postHtmlMessage(text, parsedText, RoomMessageEvent.Text)
                        return
                    }
                    if (text.indexOf(PREFIX_HTML) === 0) {
                        text = text.substr(PREFIX_HTML.length)
                        var re = new RegExp("<.*?>")
                        var plainText = text.replace(re, "")
                        currentRoom.postHtmlMessage(plainText, text, RoomMessageEvent.Text)
                        return
                    }
                    if (text.indexOf(PREFIX_MARKDOWN) === 0) {
                        text = text.substr(PREFIX_MARKDOWN.length)
                        currentRoom.postMarkdownText(text)
                        return
                    }

                    currentRoom.postPlainText(text)
                }
            }

            ToolButton {
                Layout.preferredWidth: 48
                Layout.preferredHeight: 48
                Layout.alignment: Qt.AlignBottom

                id: emojiButton

                contentItem: MaterialIcon {
                    icon: "\ue24e"
                }

                onClicked: emojiPicker.visible = !emojiPicker.visible
            }
        }
    }

    ImageClipboard {
        id: imageClipboard
    }

    function insert(str) {
        inputField.insert(inputField.cursorPosition, str)
    }

    function clear() {
        inputField.clear()
    }

    function clearReply() {
        isReply = false
        replyUser = null
        replyEventID = ""
        replyContent = ""
    }

    function focus() {
        inputField.forceActiveFocus()
    }

    function closeAll() {
        replyItem.visible = false
        autoCompleteListView.visible = false
        emojiPicker.visible = false
    }

    function attach(localPath) {
        hasAttachment = true
        attachmentPath = localPath
    }

    function clearAttachment() {
        hasAttachment = false
        attachmentPath = ""
    }
}