//
//  GroupViewModel.swift
//  PaiAi
//
//  Created by LISA on 2017/5/8.
//  Copyright © 2017年 yb. All rights reserved.
//

import UIKit
import RxSwift
import RxCocoa
import RxDataSources

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

public typealias GroupSource = GroupRepositorable & Gettable & Deletable & Readable

public struct GroupViewModel<T: GroupSource> {

    let respository: T
    weak var delegate: GroupViewModelDelegate?
    
    public init(respository: T) {
        self.respository = respository
    }
    
    public var groupContents: Observable<[AnimatableSectionModel<Int, T.Content.Element>]> {
        return respository.content.map({ model in
            return [AnimatableSectionModel(model: 0, items: model)]
        })
    }
    
    public func reload() {
        respository.loadContent(isRefresh: true)
    }
    
    public func preload() {
        respository.loadContent(isRefresh: false)
    }
    
    public func remove(of index: Int) {
        respository.remove(of: index)
    }
    
    public func didSelect(_ item: GroupItem) {
        delegate?.didSelect(item)
    }
}