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import QtQuick 2.5
import QtQuick.Controls 2.0 as Controls
import QtQuick.Dialogs 1.2
import QtQuick.Layouts 1.0

Dialog {
    property alias text: message.text
    property bool handled: false
    signal accepted(string user, string password)
    signal rejected()
    title: qsTr("Authentication Required")
    modality: Qt.NonModal

    //handle the case where users simply closes the dialog
    onVisibilityChanged: {
        if (visible == false && handled == false) {
            handled = true;
            rejected();
        } else {
            handled = false;
        }
    }

    function acceptDialog() {
        accepted(userField.text, passwordField.text);
        handled = true;
        close();
    }

    function rejectDialog() {
        rejected();
        handled = true;
        close();
    }

    contentItem: ColumnLayout {
        id: rootLayout
        anchors.fill: parent
        anchors.margins: 4
        property int minimumWidth: rootLayout.implicitWidth + rootLayout.doubleMargins
        property int minimumHeight: rootLayout.implicitHeight + rootLayout.doubleMargins

        property int doubleMargins: anchors.margins * 2

        SystemPalette { id: palette; colorGroup: SystemPalette.Active }
        Text {
            id: message
            color: palette.windowText
        }
        GridLayout {
            columns: 2
            Controls.Label {
                text: qsTr("Username:")
                color: palette.windowText
            }
            Controls.TextField {
                id: userField
                focus: true
                Layout.fillWidth: true
                onAccepted: {
                    if (userField.text && passwordField.text)
                        acceptDialog();
                }
            }
            Controls.Label {
                text: qsTr("Password:")
                color: palette.windowText
            }
            Controls.TextField {
                id: passwordField
                Layout.fillWidth: true
                echoMode: TextInput.Password
                onAccepted: {
                    if (userField.text && passwordField.text)
                        acceptDialog();
                }
            }
        }
        Item {
            Layout.fillHeight: true
        }
        RowLayout {
            Layout.alignment: Qt.AlignRight
            spacing: 8
            Controls.Button {
                id: cancelButton
                text: qsTr("Cancel")
                onClicked: rejectDialog()
            }
            Controls.Button {
                text: qsTr("Log In")
                onClicked: acceptDialog()
            }
        }
    }
}