//  消息页面
//

import SwiftUI
import Kingfisher

struct MessageView: View {
    @ObservedObject private var viewModel = UserProfileViewModel.shared
    @State private var selectedMessage: String?
    @State private var selectedSender: String?
    @State private var selectedTimestamp: String?
    @State private var isDetailViewActive = false
    @State private var isSettingsViewActive = false
    @State private var messages: [Message] = [
        Message(text: "发来了条消息", sender: "系统消息", timestamp: "4:00 PM", isSelf: false, avatar: "https://s3.hcpp.top/avatar/ORTPJkyqeULR/%E9%BB%84%E5%AF%8C%E8%B4%B5/1709263869_avatar.jpg?e=1717342975&token=DhKKj58tWve-b3U6BMyFGVUdZ78NXqs4mUhnPaZq:IsdKBn2Kyovp4haD0IQMAKrE6oA=", num: 9),
    ]
    
    var body: some View {
        NavigationStack {
            VStack {
                HStack {
                    Spacer()
                    Text("消息")
                    Spacer()
                    Button(action: addNewMessage) {
                        Image(systemName: "plus")
                    }
                    Spacer()
                    Button(action: {
                        isSettingsViewActive = true
                    }) {
                        Image(systemName: "gearshape.fill")
                    }
                }
                .padding()
                
                List {
                    ForEach(messages) { message in
                        HStack {
                            if let url = URL(string: message.avatar) {
                                KFImage(url)
                                    .resizable()
                                    .placeholder {
                                        ProgressView()
                                    }
                                .frame(width: 50, height: 50)
                                .clipShape(Circle())
                            } else {
                                Image(message.avatar)
                                    .CircleImage(size: 50)
                            }
                            VStack {
                                HStack {
                                    Text(message.sender)
                                    Spacer()
                                    Text(message.timestamp)
                                        .SetTextStyle(size: 13, color: .black.opacity(0.4))
                                }
                                HStack {
                                    Text(message.text)
                                        .SetTextStyle(size: 14, color: .black.opacity(0.5))
                                    Spacer()
                                    Text("\(message.num)")
                                        .SetTextStyle(size: 13, color: .white)
                                        .padding(.vertical, 2)
                                        .padding(.horizontal, 6)
                                        .background(Color.red, in: RoundedRectangle(cornerRadius: 12))
                                }
                            }
                        }
                        .padding(.horizontal, 12)
                        .padding(.vertical, 7)
                        .background(Color.white)
                        .onTapGesture {
                            selectedMessage = message.text
                            selectedSender = message.sender
                            selectedTimestamp = message.timestamp
                            isDetailViewActive = true
                        }
                        .swipeActions(edge: .trailing, allowsFullSwipe: true) {
                            Button(role: .destructive) {
                                deleteMessage(message)
                            } label: {
                                Label("删除", systemImage: "trash")
                            }
                        }
                    }
                }
            }
            .navigationDestination(isPresented: $isDetailViewActive) {
                MessageDetailView()
            }
            .navigationDestination(isPresented: $isSettingsViewActive) {
                MessageSettingsView()
            }
        }
        .onAppear {
            requestNotificationPermission()
        }
    }
    
    private func addNewMessage() {
        let newMessage = Message(text: "来了条消息", sender: "系统消息", timestamp: "4:00 PM", isSelf: false, avatar: "https://s3.hcpp.top/avatar/ORTPJkyqeULR/%E9%BB%84%E5%AF%8C%E8%B4%B5/1709263869_avatar.jpg?e=1717342975&token=DhKKj58tWve-b3U6BMyFGVUdZ78NXqs4mUhnPaZq:IsdKBn2Kyovp4haD0IQMAKrE6oA=", num: 12)
        messages.insert(newMessage, at: 0)
        sendNotification(for: newMessage)
    }

    private func deleteMessage(_ message: Message) {
        if let index = messages.firstIndex(where: { $0.id == message.id }) {
            messages.remove(at: index)
        }
    }

    private func requestNotificationPermission() {
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { granted, error in
            if let error = error {
                print("Request authorization failed: \(error)")
            }
        }
    }

    private func sendNotification(for message: Message) {
        let content = UNMutableNotificationContent()
        content.title = message.sender
        content.body = message.text
        content.sound = UNNotificationSound.default

        let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 1, repeats: false)
        let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)

        UNUserNotificationCenter.current().add(request)
    }
}

#Preview {
    MessageView()
}