#include "tagscene.h"

#include <QGraphicsSceneMouseEvent>

TagScene::TagScene(SQLiteSaveFile &proj)
    : proj(proj)
{
    reloadPicture();
    reloadTags();

    connect(&proj, &SQLiteSaveFile::tagChange, this, &TagScene::tagChanged);
    connect(&proj, &SQLiteSaveFile::fileReload,
            [=]() { reloadTags(); });
}

void TagScene::tagChanged(TagChange change, const Tag &tag)
{
    TagItem *it;

    switch(change)
    {
    case TagChange::CREATED:
        addTag(tag);
        break;

    case TagChange::DELETED:
        it = tags.take(tag.id);
        assert(it);
        removeItem(it);
        break;

    case TagChange::CHANGED:
        it = tags[tag.id];
        assert(it);

        it->tagUpdated(tag);
        break;
    }
}

void TagScene::reloadPicture()
{
    pix.loadFromData(proj.getImage());
    if (pix_it)
        removeItem(pix_it);
    pix_it = new QGraphicsPixmapItem(pix);
    addItem(pix_it);
}

void TagScene::addTag(const Tag tag) {
    TagItem *it = new TagItem(tag);
    addItem(it);
    tags[tag.id] = it;
}

void TagScene::reloadTags()
{
    clear();
    for (auto *it : tags.values()) {
        delete it;
    }

    for (const Tag &tag : proj.getAllTags()) {
        addTag(tag);
    }
}

void TagScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
{
    QGraphicsItem *it = itemAt(event->scenePos(), QTransform());
    if (!it) {
        QGraphicsScene::mouseDoubleClickEvent(event);
    }

    TagItem *tagitem = qgraphicsitem_cast<TagItem *>(it);
    if (!tagitem) {
        QGraphicsScene::mouseDoubleClickEvent(event);
    }

    tagDoubleClicked(tagitem->tag());
}