Bark/Controller/HomeViewController.swift

//
//  ViewController.swift
//  Bark
//
//  Created by huangfeng on 2018/3/7.
//  Copyright © 2018年 Fin. All rights reserved.
//

import UIKit
import UserNotifications
import Material
import RxCocoa
import RxDataSources

class HomeViewController: BaseViewController {
    
    let newButton: BKButton = {
        let btn = BKButton()
        btn.setImage(Icon.add, for: .normal)
        btn.frame = CGRect(x: 0, y: 0, width: 40, height: 40)
        return btn
    }()
    
    let startButton: FABButton = {
        let button = FABButton(title: NSLocalizedString("RegisterDevice"))
        button.backgroundColor = Color.white
        button.transition([ .scale(0.75) , .opacity(0)] )
        return button
    }()
        
    let tableView :UITableView = {
        let tableView = UITableView()
        tableView.separatorStyle = .none
        tableView.backgroundColor = Color.grey.lighten4
        tableView.register(PreviewCardCell.self, forCellReuseIdentifier: "\(PreviewCardCell.self)")
        tableView.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: 20, right: 0)
        return tableView
    }()
    
    override func makeUI() {
        self.view.backgroundColor = Color.grey.lighten4
        
        navigationItem.setRightBarButtonItem(
            item: UIBarButtonItem(customView: newButton))
        
        self.view.addSubview(self.tableView)
        self.tableView.snp.makeConstraints { (make ) in
            make.top.right.bottom.left.equalToSuperview()
        }
        
        self.view.addSubview(self.startButton)
        self.startButton.snp.makeConstraints { (make) in
            make.width.height.equalTo(150)
            make.centerX.equalToSuperview()
            make.centerY.equalToSuperview().offset(-50)
        }
        
        Client.shared.currentTabBarController?
            .tabBarItemDidClick
            .filter{ $0 == .service }
            .subscribe(onNext: {[weak self] index in
                self?.tableView.scrollToRow(at: IndexPath(row: 0, section: 0), at: .top, animated: true)
            }).disposed(by: self.rx.disposeBag)
        
    }
    override func bindViewModel() {
        guard let viewModel = self.viewModel as? HomeViewModel else {
            return
        }
            
        let output = viewModel.transform(
            input: HomeViewModel.Input(
                addCustomServerTap: newButton.rx.tap.asDriver(),
                viewDidAppear: self.rx.methodInvoked(#selector(viewDidAppear(_:)))
                    .map{ _ in () }
                    .asDriver(onErrorDriveWith: .empty()),
                start: self.startButton.rx.tap.asDriver(),
                clientState: Client.shared.state.asDriver()
            )
        )
        
        let dataSource = RxTableViewSectionedReloadDataSource<SectionModel<String,PreviewCardCellViewModel>> { (source, tableView, indexPath, item) -> UITableViewCell in
            if let cell = tableView.dequeueReusableCell(withIdentifier: "\(PreviewCardCell.self)") as? PreviewCardCell{
                cell.bindViewModel(model: item)
                return cell
            }
            return UITableViewCell()
        }
        
        //标题
        output.title
            .drive(self.navigationItem.rx.title)
            .disposed(by: rx.disposeBag)
        
        //TableView数据源
        output.previews
            .drive(self.tableView.rx.items(dataSource: dataSource))
            .disposed(by: rx.disposeBag)
        
        //跳转到对应页面
        output.push
            .drive(onNext: {[weak self] viewModel in
                self?.pushViewModel(viewModel: viewModel)
            })
            .disposed(by: rx.disposeBag)
        
        //通过ping服务器，判断 clienState
        output.clienStateChanged
            .drive(Client.shared.state)
            .disposed(by: rx.disposeBag)
        
        //根据通知权限，设置是否隐藏注册按钮、显示示例预览列表
        output.tableViewHidden
            .map{ !$0 }
            .drive(self.tableView.rx.isHidden)
            .disposed(by: rx.disposeBag)
        output.tableViewHidden
            .drive(self.startButton.rx.isHidden)
            .disposed(by: rx.disposeBag)
        
        //注册推送
        output.registerForRemoteNotifications.drive(onNext: {
            UIApplication.shared.registerForRemoteNotifications()
        })
        .disposed(by: rx.disposeBag)
        
        //弹出提示
        output.showSnackbar
            .drive(onNext: {[weak self] text in
                self?.showSnackbar(text: text)
            })
            .disposed(by: rx.disposeBag)
        
        //startButton是否可点击
        output.startButtonEnable
            .drive(self.startButton.rx.isEnabled)
            .disposed(by: rx.disposeBag)
        
        //复制文本
        output.copy
            .drive(onNext: {[weak self] text in
                UIPasteboard.general.string = text
                self?.showSnackbar(text: NSLocalizedString("Copy"))
            })
            .disposed(by: rx.disposeBag)
        
        //预览
        output.preview
            .drive(onNext: { url in
                UIApplication.shared.open(url, options: [:], completionHandler: nil)
            })
            .disposed(by: rx.disposeBag)
        
        //原样刷新 TableView
        output.reloadData
            .drive(onNext: {[weak self] in
                self?.tableView.reloadData()
            })
            .disposed(by: rx.disposeBag)
        
    }
    
    func pushViewModel(viewModel:ViewModel) {
        var viewController:UIViewController?
        if let viewModel = viewModel as? NewServerViewModel {
            viewController = NewServerViewController(viewModel: viewModel)
        }
        else if let viewModel = viewModel as? SoundsViewModel {
            viewController = SoundsViewController(viewModel: viewModel)
        }
        
        if let viewController = viewController {
            self.navigationController?.pushViewController(viewController, animated: true)
        }
    }
    
}