import QtQuick 2.9
import QtQuick.Controls 2.2
import QtQuick.Layouts 1.3
import QtGraphicalEffects 1.0
import QtQuick.Controls.Material 2.2
import QtQml.Models 2.3
import Spectral 0.1
import SortFilterProxyModel 0.2
import Spectral.Settings 0.1

import "../component"
import "../menu"
import "qrc:/js/util.js" as Util

Rectangle {
    property alias listModel: sortedRoomListModel.sourceModel
    property int filter: 0
    property var enteredRoom: null

    color: MSettings.darkTheme ? "#323232" : "#f3f3f3"

    Label {
        text: MSettings.miniMode ? "Empty" : "Here? No, not here."
        anchors.centerIn: parent
        visible: listView.count === 0
    }

    ColumnLayout {
        anchors.fill: parent
        spacing: 0

        TextField {
            Layout.fillWidth: true
            Layout.preferredHeight: 40
            Layout.margins: 12

            id: searchField

            leftPadding: MSettings.miniMode ? 4 : 32
            topPadding: 0
            bottomPadding: 0
            placeholderText: "Search..."

            background: Rectangle {
                color: MSettings.darkTheme ? "#303030" : "#fafafa"
                layer.enabled: true
                layer.effect: ElevationEffect {
                    elevation: searchField.focus ? 2 : 1
                }
            }

            Shortcut {
                sequence: StandardKey.Find
                onActivated: searchField.forceActiveFocus()
            }
        }

        SortFilterProxyModel {
            id: sortedRoomListModel

            proxyRoles: ExpressionRole {
                name: "display"
                expression: {
                    switch (category) {
                    case 1: return "Invited"
                    case 2: return "Favorites"
                    case 3: return "Rooms"
                    case 4: return "People"
                    case 5: return "Low Priority"
                    }
                }
            }

            sorters: [
                RoleSorter { roleName: "category" },
                RoleSorter {
                    roleName: "lastActiveTime"
                    sortOrder: Qt.DescendingOrder
                }
            ]
        }

        SortFilterProxyModel {
            id: roomListProxyModel

            sourceModel: sortedRoomListModel

            filters: [
                RegExpFilter {
                    roleName: "name"
                    pattern: searchField.text
                    caseSensitivity: Qt.CaseInsensitive
                },
                ExpressionFilter {
                    enabled: filter === 1
                    expression: unreadCount > 0
                },
                ExpressionFilter {
                    enabled: filter === 2
                    expression: category === 1 || category === 2 || category === 4
                },
                ExpressionFilter {
                    enabled: filter === 3
                    expression: category === 3 || category === 5
                }
            ]
        }

        ListView {
            Layout.fillWidth: true
            Layout.fillHeight: true

            id: listView

            spacing: 1
            clip: true

            model: roomListProxyModel

            currentIndex: -1

            highlightFollowsCurrentItem: true

            highlightMoveDuration: 200
            highlightResizeDuration: 0

            boundsBehavior: Flickable.DragOverBounds

            ScrollBar.vertical: ScrollBar {}

            delegate: Rectangle {
                readonly property bool highlighted: currentRoom === enteredRoom

                width: parent.width
                height: 64

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

                AutoMouseArea {
                    anchors.fill: parent

                    hoverEnabled: MSettings.miniMode

                    onSecondaryClicked: {
                        roomContextMenu.model = model
                        roomContextMenu.popup()
                    }
                    onPrimaryClicked: {
                        if (category === RoomType.Invited) {
                            inviteDialog.currentRoom = currentRoom
                            inviteDialog.open()
                        } else {
                            enteredRoom = currentRoom
                        }
                    }

                    ToolTip.visible: MSettings.miniMode && containsMouse
                    ToolTip.text: name
                }

                Rectangle {
                    anchors.fill: parent

                    visible: highlightCount > 0 || highlighted
                    color: Material.accent
                    opacity: 0.1
                }

                Rectangle {
                    width: unreadCount > 0 || highlighted ? 4 : 0
                    height: parent.height

                    color: Material.accent

                    Behavior on width {
                        PropertyAnimation { easing.type: Easing.InOutCubic; duration: 200 }
                    }
                }

                RowLayout {
                    anchors.fill: parent
                    anchors.margins: 12

                    spacing: 12

                    ImageItem {
                        id: imageItem

                        Layout.preferredWidth: height
                        Layout.fillHeight: true

                        hint: name || "No Name"

                        image: avatar
                    }

                    ColumnLayout {
                        Layout.fillWidth: true
                        Layout.fillHeight: true
                        Layout.alignment: Qt.AlignHCenter

                        visible: parent.width > 64

                        Label {
                            Layout.fillWidth: true
                            Layout.fillHeight: true

                            text: name || "No Name"
                            font.pointSize: 12
                            elide: Text.ElideRight
                            wrapMode: Text.NoWrap
                        }

                        Label {
                            Layout.fillWidth: true
                            Layout.fillHeight: true

                            text: (lastEvent == "" ? topic : lastEvent).replace(/(\r\n\t|\n|\r\t)/gm,"")
                            elide: Text.ElideRight
                            wrapMode: Text.NoWrap
                        }
                    }
                }
            }

            section.property: "display"
            section.criteria: ViewSection.FullString
            section.delegate: Label {
                width: parent.width
                height: 24

                text: section
                color: "grey"
                leftPadding: MSettings.miniMode ? undefined : 16
                elide: Text.ElideRight
                verticalAlignment: Text.AlignVCenter
                horizontalAlignment: MSettings.miniMode ? Text.AlignHCenter : undefined
            }

            RoomContextMenu { id: roomContextMenu }

            Dialog {
                property var currentRoom

                id: inviteDialog
                parent: ApplicationWindow.overlay

                x: (window.width - width) / 2
                y: (window.height - height) / 2
                width: 360

                title: "Action Required"
                modal: true
                standardButtons: Dialog.Ok | Dialog.Cancel

                contentItem: Label { text: "Accept this invitation?" }

                onAccepted: currentRoom.acceptInvitation()
                onRejected: currentRoom.forget()
            }
        }
    }
}