//SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
//SPDX-License-Identifier: GPL-3.0-or-later

#include "assets.h"

#include "utils/helpers.h"

Models::Assets::Assets (QObject* parent):
    QAbstractListModel(parent),
    records(),
    state(State::initial)
{}

void Models::Assets::clear () {
    beginResetModel();
    records.clear();
    endResetModel();
}

void Models::Assets::addAsset (const Asset& asset) {
    QModelIndex index = getIndex(asset.id);
    if (index.isValid())
        throw std::runtime_error("An attempt to insert a duplicating Asset to an asset model");

    beginInsertRows(QModelIndex(), records.size(), records.size());
    records.push_back(asset);
    endInsertRows();
}

void Models::Assets::addAssets (const std::deque<Asset>& assets) {
    if (assets.empty())
        return;

    for (const Asset& asset : assets)
        if (getIndex(asset.id).isValid())
            throw std::runtime_error("An attempt to insert a duplicating Asset to an asset model (bulk)");

    beginInsertRows(QModelIndex(), records.size(), records.size() + assets.size() - 1);
    for (const Asset& asset : assets)
        records.push_back(asset);

    endInsertRows();
}

void Models::Assets::deleteAsset (unsigned int id) {
    QModelIndex index = getIndex(id);
    if (!index.isValid())
        throw std::runtime_error("An attempt to delete non existing Asset from asset model");

    int row = index.row();
    beginRemoveRows(QModelIndex(), row, row);
    records.erase(records.begin() + row);
    endRemoveRows();
}

int Models::Assets::rowCount (const QModelIndex& parent) const {
    //For list models only the root node (an invalid parent) should return the
    //list's size. For all other (valid) parents, rowCount() should return 0 so
    //that it does not become a tree model.
    if (parent.isValid())
        return 0;

    return records.size();
}

QHash<int, QByteArray> Models::Assets::roleNames () const {
    static const QHash<int, QByteArray> roleNames({
        {Title, "title"}, {Icon, "icon"}, {Balance, "balance"}, {Archived, "archived"}, {Color, "color"}, {Id, "assetId"}
    });
    return roleNames;
}

bool Models::Assets::canFetchMore (const QModelIndex& parent) const {
    return state == State::initial;
}

void Models::Assets::fetchMore (const QModelIndex& parent) {
    if (state != State::initial)
        return;

    state = State::requesting;
    emit requestAssets();
}

QVariant Models::Assets::data (const QModelIndex& index, int role) const {
    if (!index.isValid())
        return QVariant();

    int row = index.row();
    if (row >= 0 && row < records.size()) {
        switch (role) {
            case Qt::DisplayRole:
            case Title:
                return records[row].title;
            case Icon:
                return records[row].icon;
            case Balance:
                return records[row].balance;
            case Archived:
                return records[row].archived;
            case Color:
                return records[row].color;
            case Id:
                return records[row].id;
        }
    }

    return QVariant();
}

bool Models::Assets::deserialize (const QVariantList& from, std::deque<Asset>& out) {
    for (const QVariant& item : from) {
        if (!item.canConvert<QVariantMap>())
            return false;

        const QVariantMap& ser = qast<QVariantMap>(item);
        Asset& asset = out.emplace_back();
        asset.title = ser.value("title").toString();
        asset.icon = ser.value("icon").toString();
        asset.archived = ser.value("archived").toBool();
        asset.id = ser.value("id").toUInt();

        uint32_t color = ser.value("color").toUInt();
        asset.color = QColor::fromRgba(color);
    }

    return true;
}

void Models::Assets::receivedAssets (const std::deque<Asset>& assets) {
    beginResetModel();
    records = assets;
    state = State::syncronized;
    endResetModel();
}

QModelIndex Models::Assets::getIndex (unsigned int id) const {
    for (std::size_t i = 0; i < records.size(); ++i) {
        if (records[i].id == id)
            return createIndex(i, 0, &records[i]);
    }

    return QModelIndex();
}