import QtQuick 2.15
import QtQuick.Controls 2.0
import SddmComponents 2.0
import "components"

Rectangle {
    id  : gRoot

    property color cTextNormal       : "#ffffff"
    property color cTextFailure      : "#f43841"
    property color cTextSuccess      : "#00ff00"
    property color cBackgroundRoot   : "#000000"
    property color cBackgroundNormal : "#333333"
    property color cBackgroundActive : "#285577"
    property color cBorderNormal     : "#222222"
    property color cBorderActive     : "#4c7899"

    property string fontFamily : "monospace"
    property int fontSize      : 16

    property string defaultUser : ""

    property int panelSize : 420
    property int offset    : 96

    color: cBackgroundRoot

    property int activeInput : initInputs()
    property int currentSessionsIndex : sessionModel.lastIndex
    property string currentSession: sessionModel.data(sessionModel.index(currentSessionsIndex, 0), Qt.UserRole + 4)

    function xCenter(sz) {
        return gRoot.width / 2 - sz / 2;
    }

    function yCenter(sz) {
        return gRoot.height / 2 - sz / 2;
    }

    function initInputs() {
        if(defaultUser != "") {
            gPasswordInput.forceActiveFocus();
            return 1;
        } else {
            gLoginInput.forceActiveFocus();
            return 0;
        }
    }

    function initInfoText() {
        var text = "";
        if(sddm.canPowerOff) {
            text += "f1 shutdown"
        }
        if(sddm.canReboot) {
            if(text != "") {
                text += " "
            }
            text += "f2 reboot"
        }
        return text;
    }
    
    function sessionsCycleSelectPrev() {
        if(timer.running) {
            return;
        }
        if (currentSessionsIndex - 1 < 0) {
            currentSessionsIndex = sessionModel.rowCount() - 1;
        } else {
            currentSessionsIndex--;
        }
    }

    function sessionsCycleSelectNext() {
        if(timer.running) {
            return;
        }
        if (currentSessionsIndex >= sessionModel.rowCount() - 1) {
            currentSessionsIndex = 0;
        } else {
            currentSessionsIndex++;
        }
    }

    function focusNext() {
        if(timer.running) {
            return;
        }
        if(gRoot.activeInput == 0) {
            gPasswordInput.forceActiveFocus();
            gRoot.activeInput = 1;
        } else if(gRoot.activeInput == -1) {
            gLoginInput.forceActiveFocus();
            gRoot.activeInput = 0;
        }
    }

    function focusPrev() {
        if(timer.running) {
            return;
        }
        if(gRoot.activeInput == 1) {
            gLoginInput.forceActiveFocus();
            gRoot.activeInput = 0;
        } else if(gRoot.activeInput == 0) {
            gSessionBox.forceActiveFocus();
            gRoot.activeInput = -1;
        } 
    }

    function setInputLock(lock) {
        gLoginInput.readOnly = lock;
        gPasswordInput.readOnly = lock;
        gLoginInput.enabled = !lock;
        gPasswordInput.enabled = !lock;
        gSessionBox.enabled = !lock;
    }

    Timer { 
        id: timer
        interval: 750
        repeat: true
        running: false
        onTriggered: {
            gInfoLabel.text += ".";
        }
    }

    function tryLogin() {
        gInfoLabel.color = cTextNormal;
        gInfoLabel.text = ".";
        timer.start();

        setInputLock(true);

        sddm.login(gLoginInput.text, gPasswordInput.text, currentSessionsIndex);
    }

    Connections {
        target: sddm
        function onLoginSucceeded() {
            timer.stop();
            gInfoLabel.color = cTextSuccess
            gInfoLabel.text = "success"
        }

        function onLoginFailed() {
            timer.stop();
            gInfoLabel.color = cTextFailure
            gInfoLabel.text = "auth failure"
            setInputLock(false);
        }
    }

    Shortcut {
        sequence: "Down"
        onActivated: focusNext();
    }

    Shortcut {
        sequence: "Up"
        onActivated: focusPrev();
    }    

    Shortcut {
        sequence: "F1"
        onActivated: {
            sddm.powerOff();
        }
    }

    Shortcut {
        sequence: "F2"
        onActivated: {
            sddm.reboot();
        }
    }

    Text {
        x: xCenter(panelSize)
        y: yCenter(panelSize)
        width: panelSize
        height: 2 * fontSize
        
        horizontalAlignment: Qt.AlignHCenter
        verticalAlignment: Qt.AlignVCenter

        font.pixelSize: fontSize
        font.family: fontFamily

        color: cTextNormal

        text: sddm.hostName;
    }

    Text {
        x: 0
        y: gRoot.height - 2 * fontSize
        width: gRoot.width
        height: 2 * fontSize
        
        horizontalAlignment: Qt.AlignHCenter
        verticalAlignment: Qt.AlignVCenter

        font.pixelSize: fontSize
        font.family: fontFamily

        color: cTextNormal
        text: initInfoText();
    }

    Rectangle {
        x: xCenter(panelSize)
        y: yCenter(panelSize) + 3 * fontSize

        Text {
            width: panelSize
            height: 2 * fontSize
            
            horizontalAlignment: Qt.AlignHLeft
            verticalAlignment: Qt.AlignVCenter

            font.pixelSize: fontSize
            font.family: fontFamily

            color: cTextNormal

            text: "session:"
        }

        SessionSelect {
            id: gSessionBox
            
            x: offset

            width: panelSize - offset
            height: fontSize * 2

            text: currentSession
            
            onPrevClicked: sessionsCycleSelectPrev();
            onNextClicked: sessionsCycleSelectNext();

            KeyNavigation.tab : gLoginInput

            Keys.onPressed: function (event) {
                if(event.key == Qt.Key_Return || event.key == Qt.Key_Enter) {
                    focusNext();
                    event.accepted = true;
                }
            }
        }
    }

    Rectangle {
        x: xCenter(panelSize)
        y: yCenter(panelSize) + 2 * 3 * fontSize

        Text {
            width: panelSize
            height: 2 * fontSize
            
            horizontalAlignment: Qt.AlignHLeft
            verticalAlignment: Qt.AlignVCenter

            font.pixelSize: fontSize
            font.family: fontFamily

            color: cTextNormal

            text: "login:"
        }

        TextBoxCustom {
            id: gLoginInput
            
            x: offset
            width: panelSize - offset
            height: 2 * fontSize

            font.pixelSize: fontSize
            font.family: fontFamily

            cText: cTextNormal
            // TODO set the remaining colors
            
            text: defaultUser

            KeyNavigation.tab : gPasswordInput
            KeyNavigation.backtab : gSessionBox

            Keys.onPressed: function (event) {
                if(event.key == Qt.Key_Return || event.key == Qt.Key_Enter) {
                    focusNext();
                    event.accepted = true;
                }
            }

        }
    }
    Rectangle {
        x: xCenter(panelSize)
        y: yCenter(panelSize) + 3 * 3 * fontSize

        Text {
            width: panelSize
            height: 2 * fontSize
            
            horizontalAlignment: Qt.AlignHLeft
            verticalAlignment: Qt.AlignVCenter

            font.pixelSize: fontSize
            font.family: fontFamily

            color: cTextNormal

            text: "password:"
        }

        TextBoxCustom {
            id: gPasswordInput
            
            x: offset
            width: panelSize - offset
            height: 2 * fontSize

            font.pixelSize: fontSize
            font.family: fontFamily

            cText: cTextNormal
            // todo set the remaining colors here
            
            echoMode: TextInput.Password

            Keys.onPressed: function(event) {
                if(event.key == Qt.Key_Return || event.key == Qt.Key_Enter) {
                    tryLogin();
                    event.accepted = true;
                }
            }
        }
    }

    Text {
        id: gInfoLabel
        
        text: ""

        x: xCenter(panelSize)
        y: yCenter(panelSize) + 4 * 3 * fontSize

        width: panelSize
        height: 2 * fontSize

        horizontalAlignment: Qt.AlignHCenter
        verticalAlignment: Qt.AlignVCenter

        color: cTextNormal
    }
}