//
//  RefreshStyle.swift
//  GXM-CRM
//
//  Created by 霹雳火 on 10/11/2017.
//  Copyright © 2017 GuoXiaoMei. All rights reserved.
//

import Foundation
import MJRefresh
import RxSwift
import RxCocoa

public enum RefreshStatus: Int {
    case invalidData // 无效的数据
    case hasMoreData // 还有更多数据
    case noMoreData // 没有更多数据
}

public enum RequestStatus {
    case begin
    case end
}

/**
 设置刷新状态
 */
public extension UIScrollView {
    
    func refresh(status: RefreshStatus, isEmpty: Bool, shouldForcedDisplay: Bool = false) {
        // 刷新空数据占位
        dl.emptyDataSet?.update(status: status, isEmpty: isEmpty, shouldForcedDisplay: shouldForcedDisplay)
        
        mj_header?.endRefreshing()
        switch status {
        case .invalidData: // 无效的数据
            mj_footer?.endRefreshing()
        case .hasMoreData: // 还有更多数据
            mj_footer?.endRefreshing()
            mj_footer?.isHidden = false
        case .noMoreData: // 没有更多数据
            mj_footer?.endRefreshingWithNoMoreData()
            mj_footer?.isHidden = false
        }
        // 数据为空，隐藏footer
        if isEmpty {
            mj_footer?.isHidden = true
        }
    }
}

public extension MJRefreshHeader {
    func addFeedbackGenerator() {
        rx.observeWeakly(MJRefreshState.self, "state").subscribe(onNext: { state in
            guard state == .pulling else { return }
            if #available(iOS 10.0, *) {
                let generator = UIImpactFeedbackGenerator(style: .medium)
                generator.impactOccurred()
            }
        }).disposed(by: rx.disposeBag)
    }
}