//
//  ScanQRViewModel.swift
//  PaiAi
//
//  Created by ffib on 2018/12/18.
//  Copyright © 2018 yb. All rights reserved.
//

import Foundation

protocol ScanQRViewModelDelegate: class {
    func navigateToGroupPage(item: GroupItem)
}

public enum QRType {
    case group
    case session
}

public final class ScanQRViewModel: Resource, Parsable {
    
    var path: Interfaces
    var parameter: Parameter = [:]
    
    weak var delegate: ScanQRViewModelDelegate?
    
    public init(type: QRType) {
        switch type {
        case .group:
            path = .joinGroup
//            parameter = ["user_id": SharedUserInfo.userId,
//                         "nickname": SharedUserInfo.name]
        case .session:
            path = .joinSession
//            parameter = ["user_id": SharedUserInfo.userId,
            //                         "nickname": SharedUserInfo.name]
        }
    }
    
    public func parse(_ json: [String: AnyObject]) -> GroupItem? {
        guard let data = json["data"] as? [String: AnyObject],
        let groupInfo = data["group"] as? [String: AnyObject] else { return nil }
        
        return GroupItem(value: groupInfo)
    }
    
    public func join(code: String) {
        let strs = code.components(separatedBy: "/")
        guard strs.count > 2, let params = strs.last else { return }
        let flag = strs[strs.count - 2]
        switch flag {
        case "s":
            guard let lensman_id = params.components(separatedBy: "=").last,
                let session_id = params.components(separatedBy: "?").first else { return }
            parameter["session_id"] = session_id
            parameter["lensman_id"] = lensman_id
        case "g":
            let group_id = params
            parameter["group_id"] = group_id
        default:
            return
        }
        join()
    }
    
    fileprivate func join() {
        NetworkApi.share.post(resource: self) { (result) in
            guard case let .success(item) = result else { return }
            self.delegate?.navigateToGroupPage(item: item)
        }
    }
}