//
//  PersistenceService.swift
//
//  Copyright 2026 Brendan Szymanski <hello@bscubed.dev>
//
//  This program 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.
//
//  This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
//
//  SPDX-License-Identifier: GPL-3.0-or-later
//

import Foundation

public struct AuthData: Codable, Sendable {
    public let serverURL: String
    public let token: String
    public let userId: String
    public let username: String

    public init(serverURL: String, token: String, userId: String, username: String) {
        self.serverURL = serverURL
        self.token = token
        self.userId = userId
        self.username = username
    }
}

public enum PersistenceError: Error {
    case migrationFailed(Error)
    case ioFailed(Error)
    case encodingFailed
    case decodingFailed
    case notFound
}

public protocol PersistenceService: Sendable {
    func loadAuth() async throws -> AuthData
    func saveAuth(_ auth: AuthData) async throws
    func clearAuth() async throws

    func getPreference(key: String) async throws -> String?
    func setPreference(key: String, value: String) async throws
    func clearAll() async throws
}