import SwiftUI
import XuqmSDK

@MainActor
final class ProfileViewModel: ObservableObject {
    @Published var profile: UserProfile?
    @Published var isLoading = false
    @Published var errorMessage: String?
    @Published var nickname: String = ""

    func loadProfile(userId: String) {
        isLoading = true
        Task {
            do {
                let p = try await ImSDK.shared.getProfile(userId: userId)
                profile = p
                nickname = p.nickname ?? userId
                isLoading = false
            } catch {
                errorMessage = error.localizedDescription
                isLoading = false
            }
        }
    }

    func saveProfile(userId: String) {
        isLoading = true
        Task {
            do {
                let p = try await ImSDK.shared.updateProfile(userId: userId, nickname: nickname)
                profile = p
                isLoading = false
            } catch {
                errorMessage = error.localizedDescription
                isLoading = false
            }
        }
    }
}

struct ProfileView: View {
    @ObservedObject var authViewModel: AuthViewModel
    @StateObject private var viewModel = ProfileViewModel()

    var body: some View {
        VStack(spacing: 20) {
            Spacer().frame(height: 40)

            ZStack {
                Circle()
                    .fill(Color.accentColor.opacity(0.15))
                    .frame(width: 80, height: 80)
                Text(String(viewModel.nickname.prefix(1).uppercased()))
                    .font(.largeTitle)
                    .foregroundStyle(Color.accentColor)
            }

            Text(authViewModel.currentUserId)
                .font(.caption)
                .foregroundStyle(.secondary)

            Divider()
                .padding(.horizontal)

            VStack(alignment: .leading, spacing: 8) {
                Text("昵称")
                    .font(.caption)
                    .foregroundStyle(.secondary)
                TextField("输入昵称", text: $viewModel.nickname)
                    .textFieldStyle(.roundedBorder)
            }
            .padding(.horizontal)

            if let error = viewModel.errorMessage {
                Text(error)
                    .font(.caption)
                    .foregroundStyle(.red)
            }

            Button {
                viewModel.saveProfile(userId: authViewModel.currentUserId)
            } label: {
                HStack {
                    if viewModel.isLoading {
                        ProgressView()
                    }
                    Text("保存")
                }
                .frame(maxWidth: .infinity)
                .padding()
                .background(Color.accentColor)
                .foregroundStyle(.white)
                .clipShape(RoundedRectangle(cornerRadius: 12))
            }
            .disabled(viewModel.isLoading || viewModel.nickname.isEmpty)
            .padding(.horizontal)

            Spacer()

            Button {
                authViewModel.logout()
            } label: {
                Text("退出登录")
                    .frame(maxWidth: .infinity)
                    .padding()
                    .background(Color.red.opacity(0.1))
                    .foregroundStyle(.red)
                    .clipShape(RoundedRectangle(cornerRadius: 12))
            }
            .padding(.horizontal)
        }
        .padding()
        .onAppear {
            if !authViewModel.currentUserId.isEmpty {
                viewModel.loadProfile(userId: authViewModel.currentUserId)
            }
        }
    }
}