//
//  GroupCoordinator.swift
//  Paiai_iOS
//
//  Created by FFIB on 2019/1/29.
//  Copyright © 2019 FFIB. All rights reserved.
//

import UIKit
import RxSwift
import RxCocoa
import PaiaiDataKit

extension NavigationSource {
    enum Group {
        case scan       /// 扫码
        case mineGroup  /// 侧边栏 照片群
        case createGroup  /// 创建群
        case photoDetail /// 照片详情页
        case recentGroup /// 最近访问的照片群
    }
}

class GroupCoordinator: BaseCoordinator<Void> {

    let groupViewController: GroupViewController
    let source: NavigationSource.Group

    init(_ viewController: GroupViewController,
         navigationController: UINavigationController,
         navigationSource: NavigationSource.Group) {
        self.groupViewController = viewController
        self.source = navigationSource
        super.init(navigationController: navigationController, viewController: viewController)
    }

    override func start() -> Observable<Void> {
        groupViewController.viewModel.delegate = self
        return didCancel
    }
}

extension GroupCoordinator: GroupViewModelDelegate {
    func navigateToGroupDetail(_ item: GroupItem) {
        let coordinator = GroupDetailCoordinator(makeGroupDetailViewController(item),
                                                 navigationController: navigationController,
                                                 navigationSource: source)

        coordinate(to: coordinator).subscribe(onNext: {[weak self] res in
            switch res {
            case .quit:
                self?.didCancel.onNext(())
            case .cancel:
                break
            }
        }).disposed(by: disposeBag)
        navigationController.pushViewController(coordinator.groupDetailViewController)
    }

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

fileprivate extension GroupCoordinator {
    func makeGroupDetailViewController(_ item: GroupItem) -> GroupDetailViewController {
        let vc = GroupDetailViewController.instantiate()
        vc.viewModel = GroupDetailViewModel(item: item)

        return vc
    }
}

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