//
//  CreateGroupConfirmViewModel.swift
//  PaiAi
//
//  Created by ffib on 2018/12/17.
//  Copyright © 2018 yb. All rights reserved.
//

import Foundation
import RxSwift
import RxCocoa

fileprivate let DefaultGroupNames = ["苹果", "香蕉", "西兰花",
                                     "杨梅", "胡萝卜", "樱桃",
                                     "玉米", "火龙果", "茄子",
                                     "无花果", "葡萄", "柠檬",
                                     "山竹", "橘子", "木瓜",
                                     "水蜜桃", "菠萝", "草莓",
                                     "西瓜"]

public final class CreateGroupConfirmViewModel {
    
    fileprivate var groupModel: BehaviorRelay<GroupItem?>
    fileprivate var createGroupResource: Resource<GroupItem>?
    
    public var avatar: Observable<String>
    public var name: Observable<String>
    public var groupModelUntilNotNil: Observable<GroupItem?>
    
    
    public init() {
        let random = Int(arc4random_uniform(19))
        avatar = Observable.create({ (observer) -> Disposable in
            observer.onNext(DefaultGroupNames[random])
            return Disposables.create()
        })
        
        name = avatar.flatMapLatest({ (currentAvatar) in
            Observable.just("\(SharedUserInfo.name)的\(currentAvatar)群")
        }).share()
        
        groupModel = BehaviorRelay<GroupItem?>(value: nil)
        
        groupModelUntilNotNil = groupModel.filter { $0 != nil }
        
        name.bind { (groupName) in
            let params = ["group_name": groupName as AnyObject,
                          "group_default_avatar": random as AnyObject,
                          "user_id": SharedUserInfo.userId as AnyObject]
            self.createGroupResource = Resource<GroupItem>.init(url: .groupCreate,
                                                                param: params,
                                                                parse: self.parse)
        }.dispose()
    }
    
    public func parse(json: [String: AnyObject]) -> GroupItem? {
        print(json)
        return nil
    }
    
    public func createGroup() {
        NetworkApi.share.post(resource: createGroupResource!) { (result) in
            guard case let .success(item) = result else { return }
            self.groupModel.accept(item)
        }
    }
}