e-party-iOS/yana/MVVM/IDLoginPage.swift

import SwiftUI
import Combine

// MARK: - IDLogin ViewModel

@MainActor
class IDLoginViewModel: ObservableObject {
    // MARK: - Published Properties
    @Published var userID: String = ""
    @Published var password: String = ""
    @Published var isPasswordVisible: Bool = false
    @Published var isLoading: Bool = false
    @Published var errorMessage: String?
    @Published var showRecoverPassword: Bool = false
    @Published var loginStep: LoginStep = .input
    
    // MARK: - Callbacks
    var onBack: (() -> Void)?
    var onLoginSuccess: (() -> Void)?
    
    // MARK: - Private Properties
    private var cancellables = Set<AnyCancellable>()
    
    // MARK: - Enums
    enum LoginStep: Equatable {
        case input
        case completed
    }
    
    // MARK: - Computed Properties
    var isLoginButtonEnabled: Bool {
        return !isLoading && !userID.isEmpty && !password.isEmpty
    }
    
    // MARK: - Public Methods
    func onBackTapped() {
        onBack?()
    }
    
    func onLoginTapped() {
        guard isLoginButtonEnabled else { return }
        
        isLoading = true
        errorMessage = nil
        
        Task {
            do {
                let result = try await performLogin()
                await MainActor.run {
                    self.handleLoginResult(result)
                }
            } catch {
                await MainActor.run {
                    self.handleLoginError(error)
                }
            }
        }
    }
    
    func onRecoverPasswordTapped() {
        showRecoverPassword = true
    }
    
    func onRecoverPasswordBack() {
        showRecoverPassword = false
    }
    
    // MARK: - Private Methods
    private func performLogin() async throws -> Bool {
        // 使用LoginHelper创建登录请求（包含DES加密）
        guard let loginRequest = await LoginHelper.createIDLoginRequest(
            userID: userID,
            password: password
        ) else {
            throw APIError.custom("DES加密失败")
        }
        
        let apiService = LiveAPIService()
        let response: IDLoginResponse = try await apiService.request(loginRequest)
        
        if response.code == 200, let data = response.data {
            // 保存用户信息（如果API返回了用户信息）
            if let userInfo = data.userInfo {
                await UserInfoManager.saveUserInfo(userInfo)
            }
            
            // 创建并保存账户模型
            guard let accountModel = AccountModel.from(loginData: data) else {
                throw APIError.custom("账户信息无效")
            }
            await UserInfoManager.saveAccountModel(accountModel)
            
            // 获取用户详细信息（如果API没有返回用户信息）
            if data.userInfo == nil, let userInfo = await UserInfoManager.fetchUserInfoFromServer(
                uid: String(data.uid ?? 0),
                apiService: apiService
            ) {
                await UserInfoManager.saveUserInfo(userInfo)
            }
            
            return true
        } else {
            throw APIError.custom(response.message ?? "Login failed")
        }
    }
    
    private func handleLoginResult(_ success: Bool) {
        isLoading = false
        if success {
            loginStep = .completed
            onLoginSuccess?()
        }
    }
    
    private func handleLoginError(_ error: Error) {
        isLoading = false
        errorMessage = error.localizedDescription
    }
}

// MARK: - IDLogin View

struct IDLoginPage: View {
    @StateObject private var viewModel = IDLoginViewModel()
    let onBack: () -> Void
    let onLoginSuccess: () -> Void
    
    var body: some View {
        GeometryReader { geometry in
            ZStack {
                // 背景
                LoginBackgroundView()
                
                VStack(spacing: 0) {
                    // 顶部导航栏
                    LoginHeaderView(onBack: {
                        viewModel.onBackTapped()
                    })
                    
                    Spacer()
                        .frame(height: 60)
                    
                    // 标题
                    Text("ID Login")
                        .font(.system(size: 28, weight: .bold))
                        .foregroundColor(.white)
                        .padding(.bottom, 60)
                    
                    // 输入框区域
                    VStack(spacing: 24) {
                        // 用户ID输入框（只允许数字）
                        CustomInputField(
                            type: .number,
                            placeholder: "Please enter ID",
                            text: $viewModel.userID
                        )
                        
                        // 密码输入框（带眼睛按钮）
                        CustomInputField(
                            type: .password,
                            placeholder: "Please enter password",
                            text: $viewModel.password,
                            isPasswordVisible: $viewModel.isPasswordVisible
                        )
                    }
                    .padding(.horizontal, 32)
                    
                    Spacer()
                        .frame(height: 80)
                    
                    // 忘记密码按钮
                    HStack {
                        Spacer()
                        Button(action: {
                            viewModel.onRecoverPasswordTapped()
                        }) {
                            Text("Forgot Password?")
                                .font(.system(size: 14))
                                .foregroundColor(.white.opacity(0.8))
                        }
                    }
                    .padding(.horizontal, 32)
                    .padding(.bottom, 20)
                    
                    // 登录按钮
                    LoginButtonView(
                        isLoading: viewModel.isLoading,
                        isEnabled: viewModel.isLoginButtonEnabled,
                        onTap: {
                            viewModel.onLoginTapped()
                        }
                    )
                    .padding(.horizontal, 32)
                    
                    Spacer()
                }
            }
        }
        .navigationBarHidden(true)
        .navigationDestination(isPresented: $viewModel.showRecoverPassword) {
            RecoverPasswordPage(
                onBack: {
                    viewModel.onRecoverPasswordBack()
                }
            )
            .navigationBarHidden(true)
        }
        .onAppear {
            viewModel.onBack = onBack
            viewModel.onLoginSuccess = onLoginSuccess
            
            #if DEBUG
            debugInfoSync("🐛 Debug模式: 已移除硬编码测试凭据")
            #endif
        }
        .onChange(of: viewModel.loginStep) { _, newStep in
            debugInfoSync("🔄 IDLoginView: loginStep 变化为 \(newStep)")
            if newStep == .completed {
                debugInfoSync("✅ IDLoginView: 登录成功，准备关闭自身")
            }
        }
    }
}

#Preview {
    IDLoginPage(
        onBack: {},
        onLoginSuccess: {}
    )
}