// SPDX-FileCopyrightText: 2023 James Graham <james.h.graham@protonmail.com>
// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL

pragma ComponentBehavior: Bound

import QtQuick
import QtQuick.Controls as QQC2
import QtQuick.Layouts

import org.kde.kirigami as Kirigami
import org.kde.kirigamiaddons.delegates as Delegates
import org.kde.kirigamiaddons.labs.components as KirigamiComponents
import org.kde.kitemmodels

import org.kde.neochat

/**
 * @brief Component for visualising the room information.
 *
 * The component has a header section which changes between group rooms and direct
 * chats with information like the avatar and topic. Followed by the allowed actions
 * and finally a user list.
 *
 * @note This component is only the contents, it will need to be placed in either
 *       a drawer (desktop) or page (mobile) to be used.
 *
 * @sa RoomDrawer, RoomDrawerPage
 */
QQC2.ScrollView {
    id: root

    /**
     * @brief The current room that user is viewing.
     */
    required property NeoChatRoom room

    required property NeoChatConnection connection

    /**
     * @brief The title that should be displayed for this component if available.
     */
    readonly property string title: root.room.isSpace ? i18nc("@action:title", "Space Members") : i18nc("@action:title", "Room Information")

    // HACK: Hide unnecessary horizontal scrollbar (https://bugreports.qt.io/browse/QTBUG-83890)
    QQC2.ScrollBar.horizontal.policy: QQC2.ScrollBar.AlwaysOff

    ListView {
        id: userList
        header: ColumnLayout {
            id: columnLayout

            property alias userListSearchField: userListSearchField

            spacing: 0
            width: ListView.view ? ListView.view.width - ListView.view.leftMargin - ListView.view.rightMargin : 0

            Loader {
                active: true
                Layout.fillWidth: true
                Layout.topMargin: Kirigami.Units.smallSpacing
                visible: !root.room.isSpace
                sourceComponent: root.room.isDirectChat() ? directChatDrawerHeader : groupChatDrawerHeader
                onItemChanged: if (item) {
                    userList.positionViewAtBeginning();
                }
            }

            Kirigami.ListSectionHeader {
                visible: !root.room.isSpace
                label: i18nc("Room actions", "Actions")
                activeFocusOnTab: false

                Layout.fillWidth: true
            }

            Delegates.RoundedItemDelegate {
                id: searchButton
                visible: !root.room.isSpace
                icon.name: "search"
                text: i18n("Search in this room")
                activeFocusOnTab: true

                Layout.fillWidth: true

                onClicked: {
                    pageStack.pushDialogLayer(Qt.createComponent('org.kde.neochat', 'RoomSearchPage'), {
                        room: root.room
                    }, {
                        title: i18nc("@action:title", "Search")
                    });
                }
            }

            Delegates.RoundedItemDelegate {
                visible: root.room.isDirectChat() && Controller.csSupported
                icon.name: "security-low-symbolic"
                text: i18nc("@action:button", "Verify user")

                onClicked: root.room.startVerification()

                Layout.fillWidth: true
            }

            Delegates.RoundedItemDelegate {
                id: favouriteButton
                visible: !root.room.isSpace
                icon.name: root.room && root.room.isFavourite ? "rating" : "rating-unrated"
                text: root.room && root.room.isFavourite ? i18n("Remove room from favorites") : i18n("Favorite this room")

                onClicked: root.room.isFavourite ? root.room.removeTag("m.favourite") : root.room.addTag("m.favourite", 1.0)

                activeFocusOnTab: true

                Layout.fillWidth: true
            }

            Delegates.RoundedItemDelegate {
                id: locationsButton
                visible: !root.room.isSpace
                icon.name: "map-flat"
                text: i18n("Show locations for this room")
                activeFocusOnTab: true

                onClicked: pageStack.pushDialogLayer(Qt.createComponent('org.kde.neochat', 'LocationsPage'), {
                    room: root.room
                }, {
                    title: i18nc("Locations on a map", "Locations")
                })

                Layout.fillWidth: true
            }

            Delegates.RoundedItemDelegate {
                id: pinnedMessagesButton
                visible: !root.room.isSpace
                icon.name: "pin-symbolic"
                text: i18nc("@action:button", "Pinned messages")
                activeFocusOnTab: true

                Layout.fillWidth: true

                onClicked: {
                    pageStack.pushDialogLayer(Qt.createComponent('org.kde.neochat', 'RoomPinnedMessagesPage'), {
                        room: root.room
                    }, {
                        title: i18nc("@title", "Pinned Messages")
                    });
                }
            }

            Delegates.RoundedItemDelegate {
                id: leaveButton
                icon.name: "arrow-left-symbolic"
                text: root.room.isSpace ? i18nc("@action:button", "Leave this space") : i18nc("@action:button", "Leave this room")
                activeFocusOnTab: true

                Layout.fillWidth: true

                onClicked: {
                    Qt.createComponent('org.kde.neochat', 'ConfirmLeaveDialog').createObject(root.QQC2.ApplicationWindow.window, {
                        room: root.room
                    }).open();
                }
            }

            Kirigami.ListSectionHeader {
                label: i18n("Members")
                activeFocusOnTab: false
                spacing: 0
                visible: !root.room.isDirectChat()

                Layout.fillWidth: true

                QQC2.ToolButton {
                    visible: root.room.canSendState("invite")
                    icon.name: "list-add-user"

                    onClicked: {
                        applicationWindow().pageStack.pushDialogLayer(Qt.createComponent('org.kde.neochat', 'InviteUserPage'), {
                            room: root.room
                        }, {
                            title: i18nc("@title", "Invite a User")
                        });
                    }

                    QQC2.ToolTip.text: i18n("Invite user to room")
                    QQC2.ToolTip.visible: hovered
                    QQC2.ToolTip.delay: Kirigami.Units.toolTipDelay
                }

                QQC2.Label {
                    Layout.alignment: Qt.AlignRight
                    text: root.room ? i18np("%1 member", "%1 members", root.room.joinedCount) : i18n("No member count")
                }
            }

            Kirigami.SearchField {
                id: userListSearchField

                visible: !root.room.isDirectChat()
                onVisibleChanged: if (visible) {
                    forceActiveFocus();
                }
                Layout.fillWidth: true
                Layout.leftMargin: Kirigami.Units.largeSpacing
                Layout.rightMargin: Kirigami.Units.largeSpacing
                Layout.bottomMargin: Kirigami.Units.smallSpacing

                focusSequence: "Ctrl+Shift+F"

                onAccepted: userFilterModel.filterText = text
            }
        }

        model: root.room.isDirectChat() ? 0 : userFilterModel

        UserFilterModel {
            id: userFilterModel
            sourceModel: RoomManager.userListModel
            allowEmpty: true
        }

        clip: true
        focus: true

        section.property: "powerLevelString"
        section.delegate: Kirigami.ListSectionHeader {
            required property string section

            width: ListView.view.width
            text: section
        }

        delegate: Delegates.RoundedItemDelegate {
            id: userDelegate

            required property int index
            required property string name
            required property string userId
            required property url avatar
            required property int powerLevel
            required property string powerLevelString

            implicitHeight: Kirigami.Units.gridUnit * 2

            text: name

            KeyNavigation.tab: navigationBar.tabGroup.checkedButton
            KeyNavigation.backtab: index === 0 ? userList.headerItem.userListSearchField : null

            onClicked: {
                RoomManager.resolveResource(userDelegate.userId, "mention");
            }

            contentItem: RowLayout {
                KirigamiComponents.Avatar {
                    implicitWidth: height
                    sourceSize {
                        height: Kirigami.Units.gridUnit + Kirigami.Units.smallSpacing * 2.5
                        width: Kirigami.Units.gridUnit + Kirigami.Units.smallSpacing * 2.5
                    }
                    source: userDelegate.avatar
                    name: userDelegate.userId

                    Layout.fillHeight: true
                }
                QQC2.Label {
                    text: userDelegate.name
                    textFormat: Text.PlainText
                    elide: Text.ElideRight

                    Layout.fillWidth: true
                }
            }
        }
    }

    Component {
        id: groupChatDrawerHeader
        GroupChatDrawerHeader {
            room: root.room
        }
    }

    Component {
        id: directChatDrawerHeader
        DirectChatDrawerHeader {
            room: root.room
        }
    }

    onRoomChanged: {
        if (userList.headerItem) {
            userList.headerItem.userListSearchField.text = "";
        }
        userList.currentIndex = -1;
    }
}