//
//  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

protocol GroupViewControllerDelegate: class {
    func didSelect(_ item: GroupItem)
}

final class GroupViewController: UIViewController {

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

    // MARK: data property
    let disposeBag = DisposeBag()
    var groupViewModel = GroupViewModel()
    weak var delegate: GroupViewControllerDelegate?
    
    // MARK: view function
    override func viewDidLoad() {
        super.viewDidLoad()
        configureRxDataSource()
        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 configureRxDataSource() {
        groupViewModel.groupContents
            .bind(to: tableView.rx.items(dataSource: dataSource))
            .disposed(by: disposeBag)
        
        tableView.rx.modelDeleted(GroupItem.self)
            .subscribe(onNext: { [unowned self] in self.groupViewModel.remove($0)})
            .disposed(by: disposeBag)
        
        tableView.rx.modelSelected(GroupItem.self)
            .subscribe(onNext: { [unowned self] in self.delegate?.didSelect($0) })
            .disposed(by: disposeBag)
        
        tableView.rx.willDisplayCell
            .subscribe({ [unowned self] in self.groupViewModel.preload(indexPath: $0.element?.indexPath)})
            .disposed(by: disposeBag)
    }
}