//
//  PersistenceManager.swift
//  Passepartout
//
//  Created by Davide De Rosa on 4/6/22.
//  Copyright (c) 2023 Davide De Rosa. All rights reserved.
//
//  https://github.com/passepartoutvpn
//
//  This file is part of Passepartout.
//
//  Passepartout is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  Passepartout 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 General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with Passepartout.  If not, see <http://www.gnu.org/licenses/>.
//

import CoreData
import Foundation
import PassepartoutLibrary

final class PersistenceManager {
    private let store: KeyValueStore

    init(store: KeyValueStore) {
        self.store = store

        // set once
        if persistenceAuthor == nil {
            persistenceAuthor = UUID().uuidString
        }
    }

    func vpnPersistence(withName containerName: String) -> VPNPersistence {
        VPNPersistence(withName: containerName, cloudKit: true, author: persistenceAuthor)
    }

    func providersPersistence(withName containerName: String) -> ProvidersPersistence {
        ProvidersPersistence(withName: containerName, cloudKit: false, author: persistenceAuthor)
    }
}

// MARK: KeyValueStore

extension PersistenceManager {
    private(set) var persistenceAuthor: String? {
        get {
            store.value(forLocation: StoreKey.persistenceAuthor)
        }
        set {
            store.setValue(newValue, forLocation: StoreKey.persistenceAuthor)
        }
    }
}

private extension PersistenceManager {
    private enum StoreKey: String, KeyStoreDomainLocation {
        case persistenceAuthor

        var domain: String {
            "Passepartout.PersistenceManager"
        }
    }
}