// SPDX-FileCopyrightText: 2021 Nheko Contributors
//
// SPDX-License-Identifier: GPL-3.0-or-later

#pragma once

#include <QAbstractListModel>
#include <QHash>
#include <QString>
#include <string>
#include <vector>

#include "MatrixClient.h"
#include <mtx/responses/public_rooms.hpp>
#include <mtxclient/http/errors.hpp>

#include "Logging.h"

namespace mtx::http {
using RequestErr = const std::optional<mtx::http::ClientError> &;
}
namespace mtx::responses {
struct PublicRooms;
}

class RoomDirectoryModel : public QAbstractListModel
{
        Q_OBJECT

        Q_PROPERTY(bool loadingMoreRooms READ loadingMoreRooms NOTIFY loadingMoreRoomsChanged)
        Q_PROPERTY(bool reachedEndOfPagination READ reachedEndOfPagination NOTIFY
                     reachedEndOfPaginationChanged)

public:
        explicit RoomDirectoryModel(QObject *parent = nullptr, const std::string &server = "");

        enum Roles
        {
                Name = Qt::UserRole,
                Id,
                AvatarUrl,
                Topic,
                MemberCount,
                Previewable,
                CanJoin,
        };
        QHash<int, QByteArray> roleNames() const override;

        QVariant data(const QModelIndex &index, int role) const override;

        inline int rowCount(const QModelIndex &parent = QModelIndex()) const override
        {
                (void)parent;
                return static_cast<int>(publicRoomsData_.size());
        }

        bool canFetchMore(const QModelIndex &) const override { return canFetchMore_; }

        bool loadingMoreRooms() const { return loadingMoreRooms_; }

        bool reachedEndOfPagination() const { return reachedEndOfPagination_; }

        void fetchMore(const QModelIndex &) override;

        Q_INVOKABLE void joinRoom(const int &index = -1);

signals:
        void fetchedRoomsBatch(std::vector<mtx::responses::PublicRoomsChunk> rooms,
                               const std::string &next_batch);
        void loadingMoreRoomsChanged();
        void reachedEndOfPaginationChanged();

public slots:
        void setMatrixServer(const QString &s = "");
        void setSearchTerm(const QString &f);

private slots:

        void displayRooms(std::vector<mtx::responses::PublicRoomsChunk> rooms,
                          const std::string &next_batch);

private:
        bool canJoinRoom(const QString &room) const;

        static constexpr size_t limit_ = 50;

        std::string server_;
        std::string userSearchString_;
        std::string prevBatch_;
        std::string nextBatch_;
        bool canFetchMore_{true};
        bool loadingMoreRooms_{false};
        bool reachedEndOfPagination_{false};
        std::vector<mtx::responses::PublicRoomsChunk> publicRoomsData_;

        std::vector<std::string> getViasForRoom(const std::vector<std::string> &room);
        void resetDisplayedData();
};