//
//  PhotoPurchaseViewModel.swift
//  PaiaiDataKit
//
//  Created by FFIB on 2019/3/19.
//  Copyright © 2019 FFIB. All rights reserved.
//

import Foundation
import RxSwift
import RxCocoa

//wechat pay
public class PhotoPurchaseViewModel {
    private var purchaseAPI: PhotoPurchaseRemoteAPI
    private var disposeBag = DisposeBag()
    private var orderId: String = ""

    public var notifyPhotoChanged = PublishSubject<PhotoItem>()

    public init(item: PhotoItem) {
        self.purchaseAPI = PhotoPurchaseRemoteAPI(item: item)

        payDidFinish()
    }

    public func switchItem(item: PhotoItem) {
        self.purchaseAPI = PhotoPurchaseRemoteAPI(item: item)
    }

    public func purchase() {
        purchaseAPI.purchase().subscribe(onSuccess: {[weak self] orderId in
            guard let `self` = self else { return }
            self.orderId = orderId
        }).disposed(by: disposeBag)
    }

    private func payDidFinish() {
        NotificationCenter.default.rx.notification(.wxPayDidFinish)
            .subscribe(onNext: { (notification) in
                guard let userInfo = notification.userInfo as? [String: Int],
                    let code = userInfo["code"] else {
                    Toast.show(message: "支付失败")
                    return
                }

                switch code {
                case 0:
                    self.getOrderDetail()
                case -2:
                    Toast.show(message: "取消支付")
                default:
                    Toast.show(message: "发生未知错误")
                }
        }).disposed(by: disposeBag)
    }

    private func getOrderDetail() {
        purchaseAPI.getOrderDetail(orderId: orderId).subscribe(onSuccess: { item in
            self.notifyPhotoChanged.onNext(item)
        }).disposed(by: disposeBag)
    }
}