//
//  account.swift
//  74 桌
//
//  Created by yunli on 2023/5/20.
//

import SwiftUI
import Alamofire

struct Constant{
    var cookiesDefaultsKey:String
}

let Constants:Constant=(Constant(cookiesDefaultsKey: "JSESSIONID"))

class CookieHandler {
    
    static let shared: CookieHandler = CookieHandler()
    
    let defaults = UserDefaults.standard
    let cookieStorage = HTTPCookieStorage.shared
    
    func getCookie(forURL url: String) -> [HTTPCookie] {
        let computedUrl = URL(string: url)
        let cookies = cookieStorage.cookies(for: computedUrl!) ?? []
        
        return cookies
    }
    
    func backupCookies(forURL url: String) -> Void {
        var cookieDict = [String : AnyObject]()
        
        for cookie in self.getCookie(forURL: url) {
            cookieDict[cookie.name] = cookie.properties as AnyObject?
        }
        
        defaults.set(cookieDict, forKey: Constants.cookiesDefaultsKey)
    }
    
    func restoreCookies() {
        if let cookieDictionary = defaults.dictionary(forKey: Constants.cookiesDefaultsKey) {
            
            for (_, cookieProperties) in cookieDictionary {
                if let cookie = HTTPCookie(properties: cookieProperties as! [HTTPCookiePropertyKey : Any] ) {
                    cookieStorage.setCookie(cookie)
                }
            }
        }
    }
}

struct Login: Encodable {
    let user: String
    let pwd: String
    let cook: String
}

class APIFetchHandler {
    static let sharedInstance = APIFetchHandler()
    
    func getCookie(name:String)->HTTPCookie?{
        if let cookie=CookieHandler().getCookie(forURL: "https://debug.sdsz.icu:81/").filter({cookie->Bool in
            return cookie.name==name
        }).first {
            return cookie
        }
        return nil
    }
    
    func fetchLoginCookie(action:@escaping(_:String)->Void) {
        if let cookie=getCookie(name:"JSESSOINID") {HTTPCookieStorage.shared.deleteCookie(cookie)}
        let url = "https://debug.sdsz.icu:81/sso/login";

        AF.request(url, method: .get, parameters: nil, encoding: URLEncoding.default, headers: nil).response{res in
            if let cookie=self.getCookie(name:"JSESSIONID"){
                action(cookie.value)
            }
        }
    }
}

func doLogin(user:String,password:String,action:@escaping(_:Int)->Void){
    APIFetchHandler().fetchLoginCookie(){(cookie:String) in
        let login = Login(user: user, pwd: password, cook: cookie)
        print(login)
        AF.request("https://debug.sdsz.icu/andlogin", method: .post, parameters: login,encoder:JSONParameterEncoder.default, headers: nil).responseString{res in
            print("\(res)")
        }
        action(1)
    }
}

struct loginView:View{
    @State var username: String = ""
    @State var password: String = ""
    @FocusState private var isFocused:Bool
    @Binding var isLoggedIn: Int
    var body: some View {
        VStack{
            Form {
                Section{
                    HStack {
                        Image(systemName:"person.fill").foregroundColor(Color(red: 0.7, green: 0.7, blue: 0.7))
                        TextField(text: $username, prompt: Text("数字校园号")) {
                            Text("数字校园号")
                        }.focused($isFocused)
                            .keyboardType(.numberPad)
                    }
                    HStack {
                        Image(systemName:"lock.fill").foregroundColor(Color(red: 0.7, green: 0.7, blue: 0.7))
                        SecureField(text: $password, prompt: Text("密码")) {
                            Text("密码")
                        }.focused($isFocused)
                    }
                }.onTapGesture  {
                    isFocused=false
                }
                Section{
                    HStack{
                        Spacer()
                        Button(action:{doLogin(user:username,password: password){(ret:Int) in
                            isLoggedIn=ret
                        }}){
                            VStack{
                                Text("登录")
                            }
                        }.font(.title3)
                        Spacer()
                    }
                }
            }
            Spacer()
        }
    }
}

struct accountView:View{
    @State var username: String = ""
    @State var password: String = ""
    @FocusState private var isFocused:Bool
    @Binding var isLoggedIn: Int
    var body: some View {
        VStack{
            Form {
                Section(header:Text("hi")){
                    Text("一些")
                    Text("一些")
                    Text("东西")
                }
                Section{
                    Button(action:{isLoggedIn=0}){
                        VStack{
                            Text("退出").foregroundColor(.red)
                        }
                    }
                }
            }
            Spacer()
        }
    }
}

struct accountView_Previews: PreviewProvider {
    @State static var isLoggedIn = 0
    static var previews: some View {
        loginView(isLoggedIn:$isLoggedIn)
    }
}