import QtQuick 2.9
import QtQuick.Controls 2.2
import QtQuick.Layouts 1.3
import QtQuick.Controls.Material 2.2

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

import Spectral 0.1

import "qrc:/js/md.js" as Markdown

Rectangle {
    property bool isReply
    property string replyUserID
    property string replyEventID
    property string replyContent

    property bool isAutoCompleting
    property var autoCompleteModel
    property int autoCompleteBeginPosition
    property int autoCompleteEndPosition

    color: MSettings.darkTheme ? "#303030" : "#fafafa"

    layer.enabled: true
    layer.effect: ElevationEffect {
        elevation: 2
    }

    Popup {
        x: 0
        y: -height - 10
        width: Math.min(autoCompleteListView.contentWidth, parent.width)
        height: 36
        padding: 0

        Material.elevation: 2

        id: autoComplete

        visible: isAutoCompleting && autoCompleteModel.length !== 0

        contentItem: ListView {
            id: autoCompleteListView

            model: autoCompleteModel

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

            highlight: Rectangle {
                color: Material.accent
                opacity: 0.4
            }

            delegate: ItemDelegate {
                property string autoCompleteText: modelData.displayName || modelData.unicode
                property bool isEmoji: modelData.unicode != null

                height: parent.height
                padding: 4

                contentItem: Row {
                    spacing: 8

                    Text {
                        width: parent.height
                        height: parent.height
                        visible: isEmoji
                        text: autoCompleteText
                        font.pointSize: 16
                        font.family: "Emoji"
                        verticalAlignment: Text.AlignVCenter
                        horizontalAlignment: Text.AlignHCenter
                    }
                    ImageItem {
                        width: parent.height
                        height: parent.height
                        visible: !isEmoji
                        image: spectralController.safeImage(modelData.avatar)
                    }
                    Label {
                        height: parent.height
                        visible: !isEmoji
                        text: autoCompleteText
                        verticalAlignment: Text.AlignVCenter
                    }
                }

                onClicked: {
                    autoCompleteListView.currentIndex = index
                    inputField.replaceAutoComplete(autoCompleteText)
                }
            }
        }
    }

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

        opacity: 0.2
        color: Material.accent
    }

    RowLayout {
        anchors.fill: parent

        spacing: 0

        ItemDelegate {
            Layout.preferredWidth: 48
            Layout.preferredHeight: 48

            id: uploadButton
            visible: !isReply

            contentItem: MaterialIcon {
                icon: "\ue226"
            }

            onClicked: currentRoom.chooseAndUploadFile()

            BusyIndicator {
                anchors.fill: parent

                running: currentRoom && currentRoom.hasFileUploading
            }
        }

        ItemDelegate {
            Layout.preferredWidth: 48
            Layout.preferredHeight: 48

            id: cancelReplyButton
            visible: isReply

            contentItem: MaterialIcon {
                icon: "\ue5cd"
            }

            onClicked: clearReply()
        }

        ScrollView {
            Layout.fillWidth: true
            Layout.preferredHeight: 48

            ScrollBar.horizontal.policy: ScrollBar.AlwaysOff

            clip: true

            TextArea {
                property real progress: 0

                id: inputField

                wrapMode: Text.Wrap
                placeholderText: isReply ? "Reply to " + replyUserID : "Send a Message"
                leftPadding: 16
                topPadding: 0
                bottomPadding: 0
                selectByMouse: true
                verticalAlignment: TextEdit.AlignVCenter

                text: currentRoom ? currentRoom.cachedInput : ""

                background: Item {
                }

                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)
                }

                ToolTip.visible: currentRoom
                                 && currentRoom.hasUsersTyping
                ToolTip.text: currentRoom ? currentRoom.usersTyping : ""

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

                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 }

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

                    if (isReply) {
                        currentRoom.sendReply(replyUserID, replyEventID, replyContent, text)
                        clearReply()
                        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)
                        var parsedText = Markdown.markdown_parser(text)
                        currentRoom.postHtmlMessage(text, parsedText, RoomMessageEvent.Text)
                        return
                    }

                    currentRoom.postPlainText(text)
                }
            }
        }

        ItemDelegate {
            Layout.preferredWidth: 48
            Layout.preferredHeight: 48

            id: emojiButton

            contentItem: MaterialIcon {
                icon: "\ue24e"
            }

            onClicked: emojiPicker.visible ? emojiPicker.close() : emojiPicker.open()

            EmojiPicker {
                x: -width + parent.width
                y: -height - 16

                width: 360
                height: 320

                id: emojiPicker

                emojiModel: EmojiModel {
                    id: emojiModel
                }

                Material.elevation: 2

                textArea: inputField
            }
        }
    }

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

    function clear() {
        inputField.clear()
    }

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