/*
    This file is part of libdjinterop.

    libdjinterop is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    libdjinterop is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include <memory>
#include <string>

#include <djinterop/config.hpp>
#include <djinterop/database.hpp>
#include <djinterop/engine/base_engine_library.hpp>
#include <djinterop/engine/engine_schema.hpp>
#include <djinterop/engine/v3/information_table.hpp>
#include <djinterop/engine/v3/performance_data_table.hpp>
#include <djinterop/engine/v3/playlist_entity_table.hpp>
#include <djinterop/engine/v3/playlist_table.hpp>
#include <djinterop/engine/v3/track_table.hpp>

namespace djinterop::engine
{
struct engine_library_context;
}

namespace djinterop::engine::v3
{

/// Represents an Engine Library with schema 3.x.
///
/// A Library with this schema is achieved by having a specific directory
/// structure in which one or more SQLite databases are stored.  The top-level
/// directory is typically named `Engine Library`, and there must then be a
/// sub-directory beneath that named `Database2`.  The main SQLite database
/// resides in that directory, and is named `m.db`.
///
/// Note that the directory that should be passed to constructors and member
/// functions of this class must be the `Engine Library` directory, not the
/// `Database2` directory.
class DJINTEROP_PUBLIC engine_library : public base_engine_library
{
public:
    /// Gets a class representing the `Information` table.
    information_table information() const noexcept { return information_; }

    /// Gets a class representing the `PerformanceData` table.
    performance_data_table performance_data() const noexcept
    {
        return performance_data_;
    }

    /// Gets a class representing the `PlaylistEntity` table.
    playlist_entity_table playlist_entity() const noexcept
    {
        return playlist_entity_;
    }

    /// Gets a class representing the `Playlist` table.
    playlist_table playlist() const noexcept { return playlist_; }

    /// Gets a class representing the `Track` table.
    track_table track() const noexcept { return track_; }

    /// Construct an instance of the class using an Engine library context.
    ///
    /// \param context Engine library context.
    explicit engine_library(std::shared_ptr<engine_library_context> context) :
        base_engine_library{std::move(context)}, information_{context_},
        performance_data_{context_}, playlist_entity_{context_},
        playlist_{context_}, track_{context_}
    {
    }

    /// Make a new, empty library of a given version.
    ///
    /// \param directory Directory in which to create the new library.
    /// \param schema Version to create.
    /// \return Returns the new Engine library.
    static engine_library create(
        const std::string& directory, const engine_schema& schema)
    {
        return engine_library{base_engine_library::create(directory, schema)};
    }

    /// Make a new, empty, in-memory library of a given version.
    ///
    /// Any changes made to the library will not persist beyond destruction
    /// of the class instance.
    ///
    /// \param schema Version to create.
    /// \return Returns the new temporary Engine library.
    static engine_library create_temporary(const engine_schema& schema)
    {
        return engine_library{base_engine_library::create_temporary(schema)};
    }

    /// Test whether an Engine Library already exists in the given directory.
    ///
    /// \param directory Directory to test.
    /// \return Returns a flag indicating whether an Engine library exists.
    static bool exists(const std::string& directory)
    {
        return base_engine_library::exists(directory);
    }

    /// Load an existing library from a directory.
    ///
    /// \param directory Directory to load from.
    static engine_library load(const std::string& directory)
    {
        return engine_library{base_engine_library::load(directory)};
    }

    /// Get the unified database interface for this Engine library.
    [[nodiscard]] djinterop::database database() const override;

private:
    information_table information_;
    performance_data_table performance_data_;
    playlist_entity_table playlist_entity_;
    playlist_table playlist_;
    track_table track_;
};

}  // namespace djinterop::engine::v3
