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

import Foundation
import KeychainStorage
import XCTest

final class KeychainStorageInitTests: XCTestCase {
    
    // MARK: Properties
    
    private var keychainStorage: TestKeychyainStorage!
    
    private var value: TestModel?
    
    // MARK: Test cases
    
    func testValue_whenNoDefaultValue_andEmptyStorage() throws {
        // GIVEN
        keychainStorage = TestKeychainStorage_withNoDefaultValue_andEmptyStorage()
        
        // WHEN
        value = keychainStorage.keychainValue
        
        // THEN
        XCTAssertNil(value)
    }

    func testValue_whenDefaultValue_andEmptyStorage() throws {
        // GIVEN
        keychainStorage = TestKeychainStorage_withDefaultValue_andEmptyStorage()
        
        // WHEN
        value = keychainStorage.keychainValue
        
        // THEN
        XCTAssertNotNil(value)
    }
    
    func testValue_whenNoDefaultValue_andValueInStorage() throws {
        // GIVEN
        keychainStorage = TestKeychainStorage_withNoDefaultValue_andValueInStorage()
        
        // WHEN
        value = keychainStorage.keychainValue
        
        // THEN
        XCTAssertNotNil(value)
    }
    
    func testValue_whenNoDefaultValue_andNoValueInStorage() throws {
        // GIVEN
        keychainStorage = TestKeychainStorage_withNoDefaultValue_andNoValueInStorage()
        
        // WHEN
        value = keychainStorage.keychainValue
        
        // THEN
        XCTAssertNil(value)
    }

}

// MARK: - Test protocols

private protocol TestKeychyainStorage {
    var keychainValue: TestModel? { get set }
}

// MARK: - Test structs

private struct TestKeychainStorage_withNoDefaultValue_andEmptyStorage: TestKeychyainStorage {
    @KeychainStorage(
        key: .Keys.someKey,
        keychain: KeychainStorageMock()
    )
    var keychainValue: TestModel?
}


private struct TestKeychainStorage_withDefaultValue_andEmptyStorage: TestKeychyainStorage {
    @KeychainStorage(
        key: .Keys.someKey,
        defaultValue: TestModel(),
        keychain: KeychainStorageMock()
    )
    var keychainValue: TestModel?
}

private struct TestKeychainStorage_withNoDefaultValue_andValueInStorage: TestKeychyainStorage {
    @KeychainStorage(
        key: .Keys.someKey,
        keychain: KeychainStorageMock(storage: [
            .Keys.someKey: try! JSONEncoder().encode(TestModel())
        ])
    )
    var keychainValue: TestModel?
}

private struct TestKeychainStorage_withNoDefaultValue_andNoValueInStorage: TestKeychyainStorage {
    @KeychainStorage(
        key: .Keys.someKey,
        keychain: KeychainStorageMock(storage: [
            .Keys.someOtherKey: try! JSONEncoder().encode(TestModel())
        ])
    )
    var keychainValue: TestModel?
}