//
//  HomeCoordinator.swift
//  PaiAi
//
//  Created by ffib on 2018/12/6.
//  Copyright © 2018 yb. All rights reserved.
//

import Foundation
import PaiaiDataKit
import PaiaiUIKit

class HomeCoordinator: Coordinator {
    fileprivate var coordinators = [CoordinatorKey: Coordinator]()
    
    var homeViewController: HomeViewController
    var navigationController: UINavigationController
    var shareUserInfoViewModel: UserInfoViewModel
    
    init(_ homeVC: HomeViewController,
         navigationController: UINavigationController,
         userInfoViewModel: UserInfoViewModel) {
        homeViewController = homeVC
        self.navigationController = navigationController
        shareUserInfoViewModel = userInfoViewModel
        homeViewController.viewModel.delegate = self
    }
    
    func start() {
        
    }
}

extension HomeCoordinator: HomeViewModelDelegate {
    func didSelect(_ items: [PhotoItem], currIndex: Int) {
        let ctl = UIStoryboard.photoDetail.instantiateController(PhotoDetailViewController.self)
        let coordinator = PhotoDetailCoordinator(ctl, nav: navigationController,
                                                 viewModel: PhotoDetailViewModel(item: items[currIndex]),
                                                 listViewModel: PhotoDetailListViewModel(items: items, currIndex: currIndex))
        coordinators[.photoDetail] = coordinator
        coordinator.start()
        navigationController.pushViewController(coordinator.photoDetailViewController)
    }
    
    func createGroup() {
        let ctl = UIStoryboard.main.instantiateCreateGroupViewController()
        ctl.delegate = self
        homeViewController.presentController(ctl)
    }
    
    func scanQR() {
        let ctl = UIStoryboard.main.instantiateScanQRViewController()
        ctl.viewModel.delegate = self
        navigationController.pushViewController(ctl)
    }
}

extension HomeCoordinator: CreateGroupViewControllerDelegate {
    func didSelect(_ item: GroupItem) {
        let ctl = UIStoryboard.group.instantiateController(GroupViewController.self)
        ctl.viewModel = GroupViewModel(groupItem: item)
        let coordinator = GroupCoordinator(ctl,
                                           navigationController: navigationController)
        coordinators[.group] = coordinator
        navigationController.pushViewController(ctl)
    }

    func navigateToCreateGroupConfirm() {
        let ctl = UIStoryboard.main.instantiateCreateGroupConfirmViewController()
        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()
        
        let ctl = UIStoryboard.group.instantiateController(GroupViewController.self)
        ctl.viewModel = GroupViewModel(groupItem: item)
        let coordinator = GroupCoordinator(ctl,
                                           navigationController: navigationController)
        coordinators[.group] = coordinator
        navigationController.pushViewController(ctl)
    }
}

extension HomeCoordinator: ScanQRViewModelDelegate {
    func navigateToGroupFromScanQR(_ item: GroupItem) {
        let ctl = UIStoryboard.group.instantiateController(GroupViewController.self)
        ctl.viewModel = GroupViewModel(groupItem: item)
        let coordinator = GroupCoordinator(ctl,
                                           navigationController: navigationController)
        coordinators[.group] = coordinator
        navigationController.pushViewController(ctl)
    }
}

extension UIStoryboard {
    fileprivate func instantiateCreateGroupViewController() -> CreateGroupViewController {
        let createGroupVC = instantiateController(CreateGroupViewController.self)
        return createGroupVC
    }
    
    fileprivate func instantiateCreateGroupConfirmViewController() -> CreateGroupConfirmViewController {
        let createGroupConfirmVC = instantiateController(CreateGroupConfirmViewController.self)
        return createGroupConfirmVC
    }
    
    fileprivate func instantiateScanQRViewController() -> ScanQRViewController {
        let scanQRVC = instantiateController(ScanQRViewController.self)
        return scanQRVC
    }
}

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