/**
 * SPDX-FileCopyrightText: 2020 Aniket Kumar <anikketkumar786@gmail.com>
 *
 * SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
 */

import QtQuick
import QtCore
import QtQuick.Controls as Controls
import QtQuick.Layouts
import org.kde.kirigami as Kirigami
import QtQuick.Dialogs
import org.kde.kdeconnect.sms

ColumnLayout {
    id: root
    property var addresses
    property var selectedFileUrls: []
    readonly property int maxMessageSize: 600000
    property alias text: messageField.text

    MessageDialog {
        id: messageDialog
        title: i18nd("kdeconnect-sms", "Failed to send")
        text: i18nd("kdeconnect-sms", "Max message size limit exceeded.")

        onAccepted: {
            messageDialog.close()
        }
    }

    FileDialog {
        id: fileDialog
        currentFolder: StandardPaths.standardLocations(StandardPaths.HomeLocation)[0]
        fileMode: FileDialog.OpenFiles

        onAccepted: {
            root.selectedFileUrls = fileDialog.fileUrls
            fileDialog.close()
        }
    }

    Kirigami.ShadowedRectangle {
        implicitHeight: sendingArea.height
        implicitWidth: sendingArea.width
        color: "transparent"
        shadow {
            size: Math.round(Kirigami.Units.largeSpacing*1.5)
            color: Kirigami.Theme.disabledTextColor
        }

        Controls.Pane {
            id: sendingArea
            enabled: page.deviceConnected
            implicitWidth: root.width
            padding: 0
            wheelEnabled: true

            RowLayout {
                anchors.fill: parent

                Controls.ScrollView {
                    Layout.fillWidth: true
                    Layout.maximumHeight: page.height > 300 ? page.height / 3 : 2 * page.height / 3
                    contentWidth: page.width - sendButtonArea.width
                    clip: true
                    Controls.ScrollBar.horizontal.policy: Controls.ScrollBar.AlwaysOff

                    Controls.TextArea {
                        width: parent.width
                        id: messageField
                        placeholderText: i18nd("kdeconnect-sms", "Compose message")
                        wrapMode: TextEdit.Wrap
                        topPadding: Kirigami.Units.gridUnit * 0.5
                        bottomPadding: topPadding
                        selectByMouse: true
                        hoverEnabled: true
                        background: MouseArea {
                            hoverEnabled: true
                            acceptedButtons: Qt.NoButton
                            cursorShape: Qt.IBeamCursor
                            z: 1
                        }
                        Keys.onReturnPressed: event => {
                            if (event.key === Qt.Key_Return) {
                                if (event.modifiers & Qt.ShiftModifier) {
                                    messageField.append("")
                                } else {
                                    sendButton.clicked()
                                    event.accepted = true
                                }
                            }
                        }
                    }
                }

                ColumnLayout {
                    id: sendButtonArea
                    Layout.alignment: Qt.AlignBottom

                    RowLayout {
                        Controls.ToolButton {
                            id: attachFilesButton
                            enabled: true
                            Layout.preferredWidth: Kirigami.Units.gridUnit * 2
                            Layout.preferredHeight: Kirigami.Units.gridUnit * 2
                            padding: 0
                            Text {
                                id: attachedFilesCount
                                text: selectedFileUrls.length
                                color: "red"
                                visible: selectedFileUrls.length > 0
                            }
                            Kirigami.Icon {
                                source: "insert-image"
                                isMask: true
                                smooth: true
                                anchors.centerIn: parent
                                width: Kirigami.Units.gridUnit * 1.5
                                height: width
                            }

                            onClicked: {
                                fileDialog.open()
                            }
                        }

                        Controls.ToolButton {
                            id: clearAttachmentButton
                            visible: selectedFileUrls.length > 0
                            Layout.preferredWidth: Kirigami.Units.gridUnit * 2
                            Layout.preferredHeight: Kirigami.Units.gridUnit * 2
                            padding: 0
                            Kirigami.Icon {
                                id: cancelIcon
                                source: "edit-clear"
                                isMask: true
                                smooth: true
                                anchors.centerIn: parent
                                width: Kirigami.Units.gridUnit * 1.5
                                height: width
                            }

                            onClicked: {
                                selectedFileUrls = []
                            }
                        }

                        Controls.ToolButton {
                            property bool isSendingInProcess: false

                            id: sendButton
                            enabled: (messageField.text.length || selectedFileUrls.length) && !isSendingInProcess
                            Layout.preferredWidth: Kirigami.Units.gridUnit * 2
                            Layout.preferredHeight: Kirigami.Units.gridUnit * 2
                            padding: 0
                            Kirigami.Icon {
                                source: "document-send"
                                enabled: sendButton.enabled
                                isMask: true
                                smooth: true
                                anchors.centerIn: parent
                                width: Kirigami.Units.gridUnit * 1.5
                                height: width
                            }

                            property bool messageSent: false

                            onClicked: {

                                // prevent sending the same message several times
                                // and don't touch enabled property
                                if (isSendingInProcess){
                                    return;
                                }
                                isSendingInProcess = true

                                if (SmsHelper.totalMessageSize(selectedFileUrls, messageField.text) > maxMessageSize) {
                                    messageDialog.visible = true
                                } else if (page.conversationId === page.invalidId) {
                                    messageSent = conversationModel.startNewConversation(messageField.text, addresses, selectedFileUrls)
                                } else {
                                    messageSent = conversationModel.sendReplyToConversation(messageField.text, selectedFileUrls)
                                }

                                if (messageSent) {
                                    messageField.text = ""
                                    selectedFileUrls = []
                                }
                                isSendingInProcess = false
                            }
                        }
                    }

                    Controls.Label {
                        id: charCount
                        text: conversationModel.getCharCountInfo(messageField.text)
                        visible: text.length > 0
                        Layout.minimumWidth: Math.max(Layout.minimumWidth, width) // Make this label only grow, never shrink
                    }
                }
            }

        }

    }

}