//
//  KeychainStorageMock.swift
//  KeychainStorageTests
//
//  Created by Javier Cicchelli on 11/12/2022.
//  Copyright © 2022 Röck+Cöde. All rights reserved.
//

import Foundation
import KeychainStorage

class KeychainStorageMock {
    
    // MARK: Properties

    private var storage: [String: Data]
    private let concurrentQueue = DispatchQueue(
        label: "com.rockncode.app.assignment.my-files.library.keychain-storage.test.queue.keychain-storage",
        attributes: .concurrent
    )
    
    // MARK: Initialisers
    
    init(storage: [String: Data] = [:]) {
        self.storage = storage
    }

}

// MARK: - Keychainable

extension KeychainStorageMock: Keychainable {
    func getData(
        _ key: String,
        ignoringAttributeSynchronizable: Bool
    ) throws -> Data? {
        var data: Data?
        
        try concurrentQueue.sync {
            guard let dataValue = storage[key] else {
                throw KeychainStorageMockError.keyIsNotDefined
            }

            data = dataValue
        }
        
        return data
    }
    
    func set(
        _ value: Data,
        key: String,
        ignoringAttributeSynchronizable: Bool
    ) throws {
        concurrentQueue.async(flags: .barrier) {
            self.storage[key] = value
        }
    }
    
    func remove(
        _ key: String,
        ignoringAttributeSynchronizable: Bool
    ) throws {
        guard storage.keys.contains(key) else {
            throw KeychainStorageMockError.keyIsNotDefined
        }
        
        concurrentQueue.async(flags: .barrier) {
            self.storage.removeValue(forKey: key)
        }
    }
}

// MARK: - KeychainStorageSpyError

enum KeychainStorageMockError: Error {
    case keyIsNotDefined
}