weibo/Weibo/LoginView.swift

//
//  LoginView.swift
//  Weibo
//
//  Created by Qihua Pan on 2020/8/17.
//  Copyright © 2020 Qihua Pan. All rights reserved.
//

import SwiftUI
import CoreData
import SwiftyJSON
import Alamofire

struct LoginView: View {
    
    @Environment(\.managedObjectContext) var contenxt:NSManagedObjectContext
    
    @EnvironmentObject var user:User
    
    let queue=OperationQueue()

    @State var showView=false
    
    func login() {
        let request=WBAuthorizeRequest()
        request.redirectURI="https://api.weibo.com/oauth2/default.html"
        WeiboSDK.send(request)
    }
    
    func loadUserInfo(){
        print("toekn=\(self.user.access_token),date=\(self.user.expiration_Date)")
        self.showView=false
        AF.request("https://api.weibo.com/2/users/show.json",parameters: ["access_token":self.user.access_token,"uid":self.user.uid]).responseJSON { response in
            
            if let data=response.data,let json = try? JSON(data: data){
                if let name=json["name"].string,
                   let avatar_hd=json["avatar_hd"].string,
                    let desc=json["description"].string,
                    let statuses_count=json["statuses_count"].int32,
                    let friends_count=json["friends_count"].int32,
                    let followers_count=json["followers_count"].int32{
                    self.user.name=name
                    self.user.avatar_hd=avatar_hd
                    self.user.desc=desc
                    self.user.statuses_count=statuses_count
                    self.user.friends_count=friends_count
                    self.user.followers_count=followers_count
                    UserData.saveContext()
                    self.showView=true
                }
             }else{
                 print("loadUserInfo error")
             }
        }
        

    }
    
    var body: some View {
        VStack {
            if self.user.access_token==nil{
                Text("正在跳转到授权页面").onAppear(perform: {
                    self.login()
                })
            }
            else if self.user.expiration_Date<Date().timeIntervalSince1970{
                Text("正在跳转到授权页面").onAppear(perform: {
                    self.login()
                })
            }
            else if self.showView{
                UserView()
            }else{
                Text("正在获取用户信息").onAppear(perform: {
                  self.loadUserInfo()
                })
            }
            
        }
    }
}

struct UserView:View {
    @EnvironmentObject var user:User
    
    var body:some View{
        VStack {
            HStack {
                ImageView(imageUrl: self.user.avatar_hd ?? "")
                .frame(width: 60.0, height: 60.0)
                .clipShape(/*@START_MENU_TOKEN@*/Circle()/*@END_MENU_TOKEN@*/)
                VStack {
                    Text(self.user.name!)
                    Text("简介:\(self.user.desc ?? "")")
                }
                Spacer()
                Button(action: {
                    print("会员")
                }) {
                    HStack(spacing:0) {
                        Image("crown")
                        Text("会员")
                        Image("arrow-right")
                    }
                }
            }
            Rectangle()
            .frame(height: 1)
            HStack(spacing: 100.0){
                VStack{
                    Text("\(self.user.statuses_count)")
                    Text("微博")
                }
                VStack{
                    Text("\(self.user.friends_count)")
                    Text("关注")
                }
                VStack{
                    Text("\(self.user.followers_count)")
                    Text("粉丝")
                }
            }
            .padding(.horizontal, 20.0)
            Rectangle()
                .frame(height: 10)
                .foregroundColor(Color(red: 220/255, green: 220/255, blue: 220/255, opacity: 1.0))
        }
    }
}


struct LoginView_Previews: PreviewProvider {

    static var previews: some View {
        UserView()
    }
}