//
//  OrderModel.swift
//  PaiAi
//
//  Created by zhengjianfei on 16/4/7.
//  Copyright © 2016年 FFIB. All rights reserved.
//

import Foundation
import RxSwift
import RxCocoa

final class OrderModel {
    
}

final class OrderModel {
    private(set) var items: BehaviorRelay<[OrderItem]>
    private var hasMore = true
    private var page = 1
    private var contentsResource: Resource<[OrderItem]>?
    
    init() {
        items = BehaviorRelay<[OrderItem]>(value: [])
        contentsResource =  Resource(url: .orderList,
                                     param: ["user_id": SharedUserInfo.userId as AnyObject],
                                     parse: parse)
    }
    
    private func parse(json: [String: AnyObject]) -> [OrderItem]? {
        guard let data = json["data"],
            let orders = data["orders"] as? [[String: AnyObject]],
            let left = data["left"] as? Int else { return nil }
        hasMore = left > 0
        return orders.map { return OrderItem(json: $0) }
    }
    
    func loadContents(isRefresh: Bool) {
        guard hasMore else { return }
        page = isRefresh ? 1 : page + 1
        contentsResource?.parameter["page"] = page as AnyObject
        NetworkApi.share.post(resource: contentsResource!) { [weak self] result in
            guard case let .success(orderItems) = result else { return }
            guard let `self` = self else { return }
            if isRefresh {
                self.items.accept(orderItems)
            } else {
                self.items.accept(orderItems + self.items.value)
            }
        }
    }
}