import QtGraphicalEffects 1.0
import QtQuick 2.7
import QtQuick.Controls 2.4
import QtQuick.Controls.Material 2.0
import QtQuick.Layouts 1.3

import "../opaque" as Opaque
import "../opaque/controls" as Awesome
import "../utils.js" as Utils
import "../widgets"
import "../opaque/theme"
import "../const"
import "../opaque/fonts"


ColumnLayout {
    id: root

    property int state: Const.state_disconnected
    property string authorization: ""

    signal sendClicked(string messageText)


    function updateState() {

        // TODO unapproved
        if (root.authorization == Const.auth_blocked) {
            statusSeperator.color = Theme.messageStatusBlockedColor
            //: Peer is blocked
            statusText.text = qsTr("peer-blocked-message")
            statusText.color = Theme.messageStatusBlockedTextColor
            txtMessage.enabled = false
            btnSend.enabled = false
            btnAttach.enabled = false
            btnEmoji.enabled = false
        } else if ( (Utils.isGroup(gcd.selectedConversation) && root.state == Const.state_synced) || (Utils.isPeer(gcd.selectedConversation) && root.state == Const.state_authenticated) ) {
            statusSeperator.color = Theme.messageStatusNormalColor
            statusText.text = ""
            txtMessage.enabled = true
            btnSend.enabled = true
            btnSend.enabled = true
            btnAttach.enabled = true
            btnEmoji.enabled = true
        } else {
            statusSeperator.color = Theme.messageStatusAlertColor
            //: Peer is offline, messages can't be delivered right now
            statusText.text = qsTr("peer-offline-message")
            statusText.color = Theme.messageStatusAlertTextColor
            txtMessage.enabled = false
            btnSend.enabled = false
            btnSend.enabled = false
            btnAttach.enabled = false
            btnEmoji.enabled = false
        }
    }

    Opaque.EmojiDrawer {
        id: emojiDrawer
        Layout.fillWidth: true
        size: 24 * gcd.themeScale

        onPicked: function(shortcode) {
            if (!txtMessage.enabled) return
            txtMessage.insert(txtMessage.cursorPosition, ":" + shortcode + ":")
        }
    }

    Rectangle {
        id: statusSeperator

        Layout.fillWidth: true

        height: statusText.visible ? statusText.height + (4 * gcd.themeScale) : 3 * gcd.themeScale
        implicitHeight: height
        color: Theme.dividerColor

        Opaque.ScalingLabel {
            id: statusText
            anchors.horizontalCenter: parent.horizontalCenter
            anchors.verticalCenter: parent.verticalCenter
            width: parent.width - 2 * Theme.paddingMinimal
            horizontalAlignment: Text.AlignHCenter
            elide: Text.ElideRight
            wrapMode: Text.NoWrap
            text: ""
            visible: text != ""
            size: Theme.chatMetaTextSize
            font.family: Fonts.applicationFontRegular.name
            font.styleName: "Bold"
        }
    }

    RowLayout { // THE BOTTOM DRAWER
        id: rowDrawer
        Layout.fillWidth: true

        Rectangle { // MESSAGE ENTRY TEXTFIELD
            id: rectMessage
            Layout.fillWidth: true
            Layout.minimumHeight: 120 * gcd.themeScale
            Layout.maximumHeight: 120 * gcd.themeScale
            color: Theme.backgroundMainColor

            Opaque.Flickable {
                id: flkMessage
                anchors.fill: parent  //this does nothing! bug in qt
                contentWidth: txtMessage.width
                contentHeight: txtMessage.height + txtma.height

                TextArea {
                    id: txtMessage
                    font.pixelSize: Theme.chatSize * gcd.themeScale
                    text: ""
                    padding: 6 * gcd.themeScale
                    wrapMode: TextEdit.Wrap
                    textFormat: Text.PlainText
                    width: rectMessage.width
                    color: Theme.mainTextColor

                    property bool skipOneUpdate: false
                    property int previousCursor

                    Keys.onReturnPressed: {
                    	if (gcd.os == "android") {
                            txtMessage.insert(txtMessage.cursorPosition, "\n")
                        } else if (event.modifiers & Qt.ShiftModifier) {
                            txtMessage.insert(txtMessage.cursorPosition, "\n")
                        } else if (event.modifiers == Qt.NoModifier) {
                            btnSend.clicked()
                        }
                    }

                    onTextChanged: {
                        // autoscroll down only when the scrollbar is already all the way down
                        if (flkMessage.contentY + flkMessage.height >= flkMessage.contentHeight - txtMessage.height && flkMessage.contentHeight > flkMessage.height) {
                            flkMessage.contentY = flkMessage.contentHeight - flkMessage.height
                        }
                    }
                }

                MouseArea {
                    id: txtma
                    anchors.top: txtMessage.bottom
                    width: flkMessage.width
                    height: Math.max(rectMessage.height - txtMessage.height, 0)

                    onClicked: { txtMessage.focus = true }
                }
            }
        }

        ColumnLayout {
            id: colRight
            spacing: 0
            width: 100 * gcd.themeScale

            Layout.minimumWidth: width
            Layout.preferredWidth: width
            Layout.maximumWidth: width

            Opaque.Icon { // SEND MESSAGE BUTTON
                id: btnSend
                source: gcd.assetPath + "core/send-24px.webp"
                width: colRight.width
                // floor(...) needed or else send icon won't scale properly(?!?)
                height: Math.floor(50 * gcd.themeScale)
                size: 36 * gcd.themeScale
                sourceWidth: size
                sourceHeight: size

                backgroundColor: enabled ? Theme.defaultButtonColor : Theme.defaultButtonDisabledColor
                hilightBackgroundColor: Theme.defaultButtonActiveColor
                iconColor: Theme.defaultButtonTextColor

                property int nextMessageID: 1

                onClicked: {
                    var txt = txtMessage.text.trim()
                    if (txt.length > 0) {
                        root.sendClicked(txt)
                    }
                    txtMessage.text = ""
                }
            }

            RowLayout {
                Layout.alignment:   Qt.AlignHCenter
                spacing: 0

                Opaque.Icon { // EMOJI DRAWER BUTTON
                    id: btnEmoji
                    source: gcd.assetPath + "core/mood-24px.webp"

                    size: 25
                    height: 36 * gcd.themeScale
                    width: 48 * gcd.themeScale

                    backgroundColor: enabled ? Theme.altButtonColor : Theme.altButtonDisabledColor
                    hilightBackgroundColor: backgroundColor
                    iconColor: enabled ? Theme.altButtonTextColor : Theme.altButtonDisabledTextColor

                    onClicked: emojiDrawer.visible ? emojiDrawer.slideclosed() : emojiDrawer.slideopen()
                }

                Opaque.Icon {
                    id: btnAttach
                    source: gcd.assetPath + "core/attach_file-24px.webp"

                    size: 25
                    height: 36 * gcd.themeScale
                    width: 48 * gcd.themeScale

                    backgroundColor: enabled ? Theme.altButtonColor : Theme.altButtonDisabledColor
                    hilightBackgroundColor: backgroundColor
                    iconColor: enabled ? Theme.altButtonTextColor : Theme.altButtonDisabledTextColor

                    onClicked: {
                        gcd.popup("attachments not yet implemented, sorry")
                    }
                }
            }
        }
    }

    Connections {
        target: gcd

        onClearMessages: function() {
            txtMessage.text = ""
        }
    }
}