//
//  ContentView.swift
//  sdlan
//
//  Created by 安礼成 on 2024/1/17.
//

import SwiftUI
import SwiftData
import Combine

struct ContentView: View {
    
    @AppStorage("token") private var token: String = ""
    @State private var showToken: Bool = false
    
    @ObservedObject private var vpnManager = VPNManager.shared
    @State private var showAlert = false
    @State private var showStunAlert = false
    @State private var message: NoticeMessage.InboundMessage = .none
    @State private var cancel: AnyCancellable?
    
    @State private var showMenu: Bool = false
    
    var body: some View {
        
        VStack(alignment: .center, spacing: 10) {
            VStack(alignment: .center, spacing: 10) {
                Spacer()
                    .frame(height: 100)
                
                Image("logo")
                    .resizable()
                    .frame(width: 150, height: 150)
                
                Text("Connecting the Infinite")
                    .font(.system(size: 24, weight: .bold))
                    .foregroundColor(.white)
                    .cornerRadius(5.0)
                
                Text("Welcome to PunchNet")
                    .font(.system(size: 14, weight: .regular))
                    .foregroundColor(.white)
                    .cornerRadius(5.0)
            }
            .contentShape(Rectangle())
            .onTapGesture {
                self.showMenu = false
            }
            
            Spacer()
                .frame(width: 1, height: 10)
            
            if showToken {
                TextField("邀请码", text: $token)
                    .multilineTextAlignment(.leading)
                    .textFieldStyle(PlainTextFieldStyle())
                    .frame(width: 200, height: 25)
                    .background(Color.white)
                    .foregroundColor(Color.black)
                    .cornerRadius(5.0)
            }
            
            Spacer()
                .frame(width: 1, height: 10)
            
            Rectangle()
                .overlay {
                    Text(vpnManager.title)
                        .font(.system(size: 14, weight: .regular))
                        .foregroundColor(vpnManager.color)
                }
                .frame(width: 120, height: 35)
                .foregroundColor(Color(red: 74 / 255, green: 207 / 255, blue: 154 / 255))
                .cornerRadius(5.0)
                .onTapGesture {
                    Task {
                        do {
                            try await self.clickSwitchButton()
                        } catch let err {
                            NSLog("start vpn get error: \(err)")
                        }
                    }
                }
            
            Spacer()
        }
        .overlay(alignment: .top) {
            
            HStack(spacing: 200) {
                HStack {
                    Button(action: {
                        NSApplication.shared.terminate(nil)
                    }) {
                        
                        Image("close")
                            .resizable()
                            .frame(width: 15, height: 15)
                    }
                    .buttonStyle(PlainButtonStyle())
                    
                    Button(action: {
                        NSApplication.shared.keyWindow?.miniaturize(nil)
                    }) {
                        Image("line")
                            .resizable()
                            .frame(width: 15, height: 15)
                    }
                    .buttonStyle(PlainButtonStyle())
                }
                
                Button(action: {
                    showMenu.toggle()
                }) {
                    Image("IosSettings")
                        .resizable()
                        .frame(width: 20, height: 20)
                }
                .buttonStyle(PlainButtonStyle())
                .overlay(alignment: .leading) {
                    showMenu ?
                    
                    GeometryReader { geometry in
                        
                        VStack(alignment: .leading, spacing: 8) {
                            Button(action: {
                                self.showMenu = false
                            }) {
                                Text("主页")
                                    .font(.system(size: 14))
                                    .foregroundColor(.white)
                            }
                            .buttonStyle(PlainButtonStyle())
                            
                            Button(action: {
                                self.showToken.toggle()
                            }) {
                                Text("邀请码")
                                    .font(.system(size: 14))
                                    .foregroundColor(.white)
                            }
                            .buttonStyle(PlainButtonStyle())
                            
                            Button(action: {
                                NSApplication.shared.terminate(nil)
                            }) {
                                Text("退出")
                                    .font(.system(size: 14))
                                    .foregroundColor(.white)
                            }
                            .buttonStyle(PlainButtonStyle())
                        }
                        .frame(width: 90, height: 80)
                        .background(Color(red: 50 / 255, green: 55 / 255, blue: 52 / 255))
                        .offset(x: -55, y: 20)
                    }
                    
                    : nil
                }
                
            }
            .offset(x: 0, y: 10)
        }
        .frame(width: 300, height: 500)
        .background(Color(red: 36 / 255, green: 38 / 255, blue: 51 / 255))
        .alert(isPresented: $showAlert) {
            Alert(title: Text("请输入正确的邀请码"))
        }
        .alert(isPresented: $showStunAlert) {
            switch self.message {
            case .upgradeMessage(let upgradeMessage):
                Alert(title: Text(upgradeMessage.prompt))
            case .alertMessage(let alertMessage):
                Alert(title: Text(alertMessage.alert))
            default:
                Alert(title: Text(""))
            }
        }
        .onAppear {
            self.cancel = UDPNoticeCenterServer.shared.messageFlow.sink{ message in
                DispatchQueue.main.async {
                    self.message = message
                    self.showStunAlert = true
                }
            }
        }
    }
    
    private func clickSwitchButton() async throws {
        switch self.vpnManager.vpnStatus {
        case .connected:
            try await vpnManager.disableVpn()
        case .disconnected:
            /*
             if self.token.isEmpty {
             self.showAlert = true
             return
             }
             */
            //print("use port: \(vpnManager.noticePort as NSObject)")
            try await vpnManager.enableVpn(options: [
                "version:": SystemConfig.version as NSObject,
                "installed_channel": SystemConfig.installedChannel as NSObject,
                "token": self.token as NSObject
            ])
        }
    }
    
}

#Preview {
    ContentView()
    //.modelContainer(for: Item.self, inMemory: true)
}