//
//  GroupViewController.swift
//  PaiAi
//
//  Created by zhengjianfei on 16/4/4.
//  Copyright © 2016年 FFIB. All rights reserved.
//

import UIKit
import RxSwift
import RxCocoa
import RxDataSources
import PaiaiDataKit
import PaiaiUIKit

final class GroupViewController: UIViewController {

    // MARK: Storyboard property
    @IBOutlet var tableView: UITableView!

    // MARK: data property
    fileprivate let disposeBag = DisposeBag()
    var viewModel: GroupViewModel<GroupRepository>!
    
    // MARK: view function
    override func viewDidLoad() {
        super.viewDidLoad()
        configurationRx()
        groupViewModel.reload()
    }
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(true)
        titleWithbackBar = "我的照片群"
    }
    
    var dataSource: RxTableViewSectionedAnimatedDataSource<AnimatableSectionModel<Int, GroupItem>> {
        return RxTableViewSectionedAnimatedDataSource<AnimatableSectionModel<Int, GroupItem>>(configureCell: { (dataSource, tableView, indexPath, item) in
            let cell = tableView.dequeueReusableCell(withIdentifier: "groupCell", for: indexPath) as! GroupCell
            cell.setInfo(item)
            return cell
        }, canEditRowAtIndexPath: { _, _ in true })
    }
    
    func configurationRx() {
        viewModel.groupContents
            .bind(to: tableView.rx.items(dataSource: dataSource))
            .disposed(by: disposeBag)
        
        tableView.rx.itemDeleted
            .subscribe(onNext: { [unowned self] in self.viewModel.remove(of: $0)})
            .disposed(by: disposeBag)
        
        tableView.rx.modelSelected(GroupItem.self)
            .subscribe(onNext: { [unowned self] in self.viewModel.didSelect($0) })
            .disposed(by: disposeBag)
        
        tableView.rx.willDisplayCell
            .subscribe(onNext: { [unowned self] in self.preload(indexPath: $0.at)})
            .disposed(by: disposeBag)
    }
    
    func preload(indexPath: IndexPath) {
        guard indexPath.row = collectionView.numberOfItems(inSection: 0) else { return }
        viewModel.preload()
    }
    
}