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#include "pch.hpp"
#include "PersistedPlayQueueQuery.h"
#include <musikcore/db/Statement.h>
#include <musikcore/db/ScopedTransaction.h>
#include <musikcore/library/track/TrackList.h>

using namespace musik::core;
using namespace musik::core::db;
using namespace musik::core::library::query;

const std::string PersistedPlayQueueQuery::kQueryName = "PersistedPlayQueueQuery";

PersistedPlayQueueQuery::PersistedPlayQueueQuery(
    musik::core::ILibraryPtr library,
    musik::core::audio::PlaybackService& playback,
    Type type) noexcept
: library(library)
, playback(playback)
, type(type)
{

}

bool PersistedPlayQueueQuery::OnRun(musik::core::db::Connection &db) {
    if (this->type == Type::Save) {
        ScopedTransaction transaction(db);

        TrackList tracks(this->library);
        this->playback.CopyTo(tracks);

        {
            Statement deleteTracks("DELETE FROM last_session_play_queue", db);
            deleteTracks.Step();
        }

        {
            Statement insert("INSERT INTO last_session_play_queue (track_id) VALUES (?)", db);
            for (size_t i = 0; i < tracks.Count(); i++) {
                insert.Reset();
                insert.BindInt64(0, tracks.GetId(i));
                insert.Step();
            }
        }
    }
    else if (this->type == Type::Restore) {
        auto editor = this->playback.Edit();
        editor.Clear();

        Statement query("SELECT track_id FROM last_session_play_queue ORDER BY id ASC", db);
        while (query.Step() == db::Row) {
            editor.Add(query.ColumnInt64(0));
        }
    }

    return true;
}
