/*
 Copyright 2019 New Vector Ltd
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 
 http://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

import UIKit

@objcMembers
final class KeyBackupSetupCoordinator: KeyBackupSetupCoordinatorType {
    
    // MARK: - Properties
    
    // MARK: Private
    
    private let navigationRouter: NavigationRouterType
    private let session: MXSession
    
    // MARK: Public
    
    var childCoordinators: [Coordinator] = []
    
    weak var delegate: KeyBackupSetupCoordinatorDelegate?
    
    // MARK: - Setup
    
    init(session: MXSession) {
        self.navigationRouter = NavigationRouter(navigationController: RiotNavigationController())
        self.session = session
    }    
    
    // MARK: - Public methods
    
    func start() {
    
        // Set key backup setup intro as root controller
        
        let keyBackupSetupIntroViewController = KeyBackupSetupIntroViewController.instantiate()
        keyBackupSetupIntroViewController.delegate = self
        self.navigationRouter.setRootModule(keyBackupSetupIntroViewController)
    }
    
    func toPresentable() -> UIViewController {
        return self.navigationRouter.toPresentable()
    }
    
    // MARK: - Private methods
    
    private func showSetupPassphrase(animated: Bool) {
        let keyBackupSetupPassphraseCoordinator = KeyBackupSetupPassphraseCoordinator(session: self.session)
        keyBackupSetupPassphraseCoordinator.delegate = self
        keyBackupSetupPassphraseCoordinator.start()
        
        self.add(childCoordinator: keyBackupSetupPassphraseCoordinator)
        self.navigationRouter.push(keyBackupSetupPassphraseCoordinator, animated: animated) { [weak self] in
            self?.remove(childCoordinator: keyBackupSetupPassphraseCoordinator)
        }
    }
    
    private func showRecoveryKey(with megolmBackupCreationInfo: MXMegolmBackupCreationInfo, animated: Bool) {
        
        let keyBackupSetupRecoveryKeyCoordinator = KeyBackupSetupRecoveryKeyCoordinator(session: self.session, megolmBackupCreationInfo: megolmBackupCreationInfo)
        keyBackupSetupRecoveryKeyCoordinator.delegate = self
        keyBackupSetupRecoveryKeyCoordinator.start()
        
        self.add(childCoordinator: keyBackupSetupRecoveryKeyCoordinator)
        self.navigationRouter.push(keyBackupSetupRecoveryKeyCoordinator, animated: animated) { [weak self] in
            self?.remove(childCoordinator: keyBackupSetupRecoveryKeyCoordinator)
        }
    }
}

// MARK: - KeyBackupSetupIntroViewControllerDelegate
extension KeyBackupSetupCoordinator: KeyBackupSetupIntroViewControllerDelegate {
    
    func keyBackupSetupIntroViewControllerDidTapSetupAction(_ keyBackupSetupIntroViewController: KeyBackupSetupIntroViewController) {
        self.showSetupPassphrase(animated: true)
    }
    
    func keyBackupSetupIntroViewControllerDidCancel(_ keyBackupSetupIntroViewController: KeyBackupSetupIntroViewController) {
        self.delegate?.keyBackupSetupCoordinatorDidCancel(self)
    }
}

// MARK: - KeyRecoveryPassphraseCoordinatorDelegate
extension KeyBackupSetupCoordinator: KeyBackupSetupPassphraseCoordinatorDelegate {
    func keyBackupSetupPassphraseCoordinator(_ keyBackupSetupPassphraseCoordinator: KeyBackupSetupPassphraseCoordinatorType, didCompleteWithMegolmBackupCreationInfo megolmBackupCreationInfo: MXMegolmBackupCreationInfo) {
        self.showRecoveryKey(with: megolmBackupCreationInfo, animated: true)
    }
    
    func keyBackupSetupPassphraseCoordinatorDidCancel(_ keyBackupSetupPassphraseCoordinator: KeyBackupSetupPassphraseCoordinatorType) {
        self.delegate?.keyBackupSetupCoordinatorDidCancel(self)
    }
}

// MARK: - KeyBackupSetupRecoveryKeyCoordinatorDelegate
extension KeyBackupSetupCoordinator: KeyBackupSetupRecoveryKeyCoordinatorDelegate {
    func keyBackupSetupRecoveryKeyCoordinatorDidCreateBackup(_ keyBackupSetupRecoveryKeyCoordinator: KeyBackupSetupRecoveryKeyCoordinatorType) {
        self.delegate?.keyBackupSetupCoordinatorDidSetupRecoveryKey(self)
    }
    
    func keyBackupSetupRecoveryKeyCoordinatorDidCancel(_ keyBackupSetupRecoveryKeyCoordinator: KeyBackupSetupRecoveryKeyCoordinatorType) {
        self.delegate?.keyBackupSetupCoordinatorDidCancel(self)
    }
}