//
//  Copyright (c) 2022 Touch Instinct
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the Software), to deal
//  in the Software without restriction, including without limitation the rights
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//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//

import Foundation
import TIFoundationUtils
import KeychainAccess

open class DefaultEncryptedTokenStorage: SingleValueAuthKeychainStorage<StringEncryptionResult> {
    open class Defaults: SingleValueAuthKeychainStorage<StringEncryptionResult>.Defaults {
        public static var encryptedTokenStorageKey: StorageKey<StringEncryptionResult> {
            .init(rawValue: keychainServiceIdentifier + ".encryptedToken")
        }
    }

    public init(keychain: Keychain = Keychain(service: Defaults.keychainServiceIdentifier),
                encryptedTokenStorageKey: StorageKey<StringEncryptionResult> = Defaults.encryptedTokenStorageKey,
                appFirstRunCheckStorage: BoolValueDefaultsStorage = DefaultResetAuthSettingsStorage()) {

        let getValueClosure: GetValueClosure = { keychain, storageKey in
            do {
                guard let value = try keychain.getData(storageKey.rawValue) else {
                    return .failure(.valueNotFound)
                }

                do {
                    return .success(try StringEncryptionResult(storableData: value))
                } catch {
                    return .failure(.unableToDecode(underlyingError: error))
                }
            } catch {
                return .failure(.unableToExtractData(underlyingError: error))
            }
        }

        let storeValueClosure: StoreValueClosure = { keychain, value, storageKey in
            do {
                return .success(try keychain.set(value.asStorableData(), key: storageKey.rawValue))
            } catch {
                return .failure(.unableToWriteData(underlyingError: error))
            }
        }

        super.init(keychain: keychain,
                   storageKey: encryptedTokenStorageKey,
                   getValueClosure: getValueClosure,
                   storeValueClosure: storeValueClosure,
                   appFirstRunCheckStorage: appFirstRunCheckStorage)
    }
}