//
//  GroupDetailCoordinator.swift
//  Paiai_iOS
//
//  Created by FFIB on 2018/12/19.
//  Copyright © 2018 FFIB. All rights reserved.
//

import UIKit
import RxSwift
import PaiaiDataKit

enum GroupDetailCoordinatorResult {
    case quit
    case cancel
}

class GroupDetailCoordinator: BaseCoordinator<GroupDetailCoordinatorResult> {
    let groupDetailViewController: GroupDetailViewController
    let source: NavigationSource.Group
    var coordinatorResult = PublishSubject<GroupDetailCoordinatorResult>()
    
    init(_ viewController: GroupDetailViewController,
         navigationController: UINavigationController,
         navigationSource: NavigationSource.Group) {
        self.source = navigationSource
        self.groupDetailViewController = viewController
        
        super.init(navigationController: navigationController, viewController: viewController)
    }
    
    override func start() -> Observable<GroupDetailCoordinatorResult> {
        groupDetailViewController.viewModel.delegate = self
        let quit = groupDetailViewController.viewModel.didQuit.map { _ in GroupDetailCoordinatorResult.quit }
        let cancel = didCancel.map { _ in GroupDetailCoordinatorResult.cancel }
        return Observable.amb([cancel, quit])
    }
}

extension GroupDetailCoordinator: GroupDetailViewModelDelegate {
    func navigationBackToGroupDetail() {
        navigationController.popViewController(animated: true)
    }
    
    func navigateToRootViewController() {
        coordinatorResult.onNext(.quit)
        switch source {
        case .createGroup, .scan, .photoDetail, .recentGroup:
            navigationController.popToRootViewController(animated: true)
            break
        case .mineGroup:
            let targetVC = navigationController.viewControllers[navigationController.viewControllers.count - 3]
            navigationController.popToViewController(targetVC, animated: true)
        }
    }
    
    func navigateToGroupMember(_ item: GroupDetailItem) {
        navigationController.pushViewController(makeGroupMemberViewController(item))
    }
    
    func navigateToGroupNameModification(_ item: GroupDetailItem) {
        navigationController.pushViewController(makeGroupNameModificationViewController(item))
    }
}

extension GroupDetailCoordinator {
    func makeGroupMemberViewController(_ item: GroupDetailItem) -> GroupMemberViewController {
        let vc = GroupMemberViewController.instantiate()
        vc.viewModel = GroupMemberViewModel(item: item)
        return vc
    }
    
    func makeGroupNameModificationViewController(_ item: GroupDetailItem) -> GroupNameModificationViewController {
        let vc = GroupNameModificationViewController.instantiate()
        vc.viewModel = groupDetailViewController.viewModel
        return vc
    }
}

extension UIStoryboard {
    static var groupDetail: UIStoryboard {
        return UIStoryboard(name: "GroupDetail", bundle: Bundle(identifier: "com.Paiai-iOS"))
    }
}