//
//  GroupPageViewModel.swift
//  PaiAi
//
//  Created by zhengjianfei on 2017/1/4.
//  Copyright © 2017年 FFIB. All rights reserved.
//

import Foundation
import UIKit
import ObjectMapper
import RxSwift
import RxCocoa

public protocol GroupPageViewModelDelegate: class {
    func didSelect(_ item: PhotoItem)
    func navigateToGroupDetail()
    func navigateToGroupQR()
}

public typealias GroupPageSource = GroupPhotoRepositorable & Gettable & Submitable & Layoutable

public class GroupPageViewModel<T: GroupPageSource> {
    fileprivate let respository: T
    public var isReload: Observable<Bool>
    
    weak var delegate: GroupPageViewModelDelegate?
    
    public init(respository: T) {
        self.respository = respository
        isReload = respository.loadingObserver
    }
    
    public var groupPhotoContents: Observable<[AnimatableSectionModel<Int, T.Content.Element>]> {
        return respository.content.map({ model in
            return [AnimatableSectionModel(model: 0, items: model)]
        })
    }

    public func submit(image: UIImage) {
        let edge = image.size.width > image.size.height ? image.size.height : image.size.width
//        let newImage = image.scaledImage(1280 / edge),
        guard let data = image.jpegData(compressionQuality: 0.4) else { return }

        respository.submit(data: data)
    }
    
    public func reload() {
        respository.loadContent(isRefresh: true)
    }
    
    public func didSelect(_ item: PhotoItem) {
        delegate?.didSelect(item)
    }
    
    public func navigateToGroupDetail() {
        delegate?.navigateToGroupDetail()
    }
    
    public func navigateToGroupQR() {
        delegate?.navigateToGroupDetail()
    }
    
    public func layoutSizeForIndexPath(_ indexPath: IndexPath) -> CGSize {
        let i = indexPath.row
        return respository.layoutSizeForIndex(i)
    }
}