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.Component 2.0
import Spectral.Menu 2.0
import Spectral.Effect 2.0

import Spectral 0.1
import Spectral.Setting 0.1
import SortFilterProxyModel 0.2

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()
            }
        }
    }
}