//
//  HomeCoordinator.swift
//  Paiai_iOS
//
//  Created by FFIB on 2018/12/6.
//  Copyright © 2018 FFIB. All rights reserved.
//

import UIKit
import RxSwift
import PaiaiDataKit

class HomeCoordinator: BaseCoordinator<Void> {

    var homeViewController: HomeViewController
    var containerViewController: ContainerViewController
    var shareUserInfoViewModel: UserInfoViewModel

    init(_ viewController: HomeViewController,
         navigationController: UINavigationController,
         containerViewController: ContainerViewController,
         userInfoViewModel: UserInfoViewModel) {
        self.homeViewController = viewController
        self.shareUserInfoViewModel = userInfoViewModel
        self.containerViewController = containerViewController
        super.init(navigationController: navigationController, viewController: viewController)
    }

    @discardableResult
    override func start() -> Observable<Void> {
        homeViewController.viewModel.delegate = self

        return Observable.never()
    }
}

extension HomeCoordinator: HomeViewModelDelegate {
    func didSelect(_ items: [PhotoItem], currIndex: Int) {
        let vc = PhotoDetailViewController.instantiate()
        let coordinator = PhotoDetailCoordinator(vc,
                                                 nav: navigationController,
                                                 viewModel: PhotoDetailViewModel(items: items, currIndex: currIndex))
        coordinate(to: coordinator).subscribe().disposed(by: disposeBag)
        navigationController.pushViewController(coordinator.photoDetailViewController)
    }

    func createGroup() {
        let ctl = CreateGroupViewController.instantiate()
        ctl.delegate = self
        homeViewController.presentController(ctl)
    }

    func scanQR() {
        let ctl = ScanQRViewController.instantiate()
        ctl.viewModel.delegate = self
        navigationController.pushViewController(ctl)
    }
}

extension HomeCoordinator: CreateGroupViewControllerDelegate {
    func createGroupViewControllerDidSelect(_ item: GroupItem) {
        coordinateToGroupCoordinator(item: item, navigationSource: .recentGroup)
    }

    func navigateToCreateGroupConfirm() {
        let ctl = CreateGroupConfirmViewController.instantiate()
        ctl.viewModel = CreateGroupViewModel(userInfoViewModel: shareUserInfoViewModel)
        ctl.viewModel.delegate = self
        homeViewController.presentController(ctl)
    }
}

extension HomeCoordinator: CreateGroupViewModelDelegate {
    func navigateToGroup(_ item: GroupItem) {
        guard let vc = homeViewController.presentedViewController,
            vc.isMember(of: CreateGroupConfirmViewController.self) else { return }
        vc.dismissController()
        coordinateToGroupCoordinator(item: item, navigationSource: .createGroup)
    }
}

extension HomeCoordinator: ScanQRViewModelDelegate {
    func navigateToGroupFromScanQR(_ item: GroupItem) {
        coordinateToGroupCoordinator(item: item, navigationSource: .scan)
    }
}

fileprivate extension HomeCoordinator {
    func coordinateToGroupCoordinator(item: GroupItem, navigationSource: NavigationSource.Group) {
        let vc = GroupViewController.instantiate()
        vc.viewModel = GroupViewModel(groupItem: item)

        let coordinator = GroupCoordinator(vc,
                                           navigationController: navigationController,
                                           navigationSource: navigationSource)
        coordinate(to: coordinator).subscribe().disposed(by: disposeBag)

        navigationController.pushViewController(vc)

    }
}

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