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

import UIKit
import RxSwift
import PaiaiUIKit
import PaiaiDataKit

let kScreenWidth = UIScreen.main.bounds.size.width
let kScreenHeight = UIScreen.main.bounds.size.height

public final class AppCoordinator: BaseCoordinator<Void> {

    private let window: UIWindow
    var shareUserInfoViewModel = UserInfoViewModel()
    var containerViewController: ContainerViewController

    public init(window: UIWindow) {
        self.window = window
        self.containerViewController = ContainerViewController()
        super.init(navigationController: NavigationController(rootViewController: containerViewController),
                   viewController: containerViewController)
    }

    override public func start() -> Observable<Void> {
        makeContainerViewController()

        window.rootViewController = navigationController
        window.makeKeyAndVisible()

        return .never()
    }
}

extension AppCoordinator: ContainerViewControllerDelegate {
    func presentLogin() {
        let vc = makeLoginViewController()
        coordinate(to: LoginCoordinator(vc))
            .subscribe(onNext: { _ in
                vc.removeFromParentAndView()
            }).disposed(by: disposeBag)
        navigationController.addFullScreen(childViewController: vc)
    }

    func presentMine() {
        let vc = makeMineViewController()
        let mineCoordinator = MineCoordinator(vc,
                                              navigationController: navigationController)
        coordinate(to: mineCoordinator).subscribe().disposed(by: disposeBag)
        containerViewController.presentController(mineCoordinator.mineViewController)
    }
}

extension AppCoordinator {
    func makeContainerViewController() {
        containerViewController.userInfo = shareUserInfoViewModel
        containerViewController.delegate = self

        containerViewController.loadViewIfNeeded()

        let homeVC = makeHomeViewController()
        let messageVC = makeMessageViewController()

        let homeCoordinator = HomeCoordinator(homeVC,
                                              navigationController: navigationController,
                                              containerViewController: containerViewController,
                                              userInfoViewModel: shareUserInfoViewModel)
        coordinate(to: homeCoordinator).subscribe().disposed(by: disposeBag)

        let messageCoordinator = MessageCoordinator(messageVC,
                                                    navigationController: navigationController,
                                                    containerViewController: containerViewController)
        coordinate(to: messageCoordinator).subscribe().disposed(by: disposeBag)

        containerViewController.pageItems = [PageItem(title: "首页",
                                                      viewController: homeVC),
                                             PageItem(title: "消息",
                                                      viewController: messageVC)]
    }

    func makeHomeViewController() -> HomeViewController {
        let vc = HomeViewController.instantiate()
        vc.viewModel = HomeViewModel()
        vc.userInfoViewModel = shareUserInfoViewModel
        return vc
    }

    func makeMessageViewController() -> MessageViewController {
        let vc = MessageViewController.instantiate()
        vc.viewModel = MessageViewModel()
        vc.userInfoViewModel = shareUserInfoViewModel
        return vc
    }
}

extension AppCoordinator {
    func makeMineViewController() -> MineViewController {
        let vc = MineViewController.instantiate()
        vc.userInfoViewModel = shareUserInfoViewModel
        return vc
    }

    func makeLoginViewController() -> LoginViewController {
        let vc = LoginViewController.instantiate()
        vc.userInfoViewModel = shareUserInfoViewModel
        return vc
    }
}