using UnityEngine;
using UnityEngine.UI;

public class LoginUI : MonoBehaviour
{
    [Header("登录面板")]
    public GameObject loginPanel;
    public InputField usernameInput;
    public InputField passwordInput;
    public Button loginButton;
    public Button switchToRegisterButton;
    public Button guestButton;
    public Text loginMessageText;
    
    [Header("注册面板")]
    public GameObject registerPanel;
    public InputField registerUsernameInput;
    public InputField registerPasswordInput;
    public InputField registerEmailInput;
    public Button registerButton;
    public Button switchToLoginButton;
    public Text registerMessageText;
    
    [Header("加载提示")]
    public GameObject loadingPanel;
    public Text loadingText;
    
    private LoginManager loginManager;
    
    private void Start()
    {
        loginManager = LoginManager.Instance;
        ConfigurePasswordInputs();
        
        if (loginManager == null)
        {
            Debug.LogError("LoginManager未找到！");
            return;
        }
        
        loginButton.onClick.AddListener(OnLoginButtonClicked);
        registerButton.onClick.AddListener(OnRegisterButtonClicked);
        switchToRegisterButton.onClick.AddListener(ShowRegisterPanel);
        switchToLoginButton.onClick.AddListener(ShowLoginPanel);
        
        if (guestButton != null)
        {
            guestButton.onClick.AddListener(OnGuestButtonClicked);
        }
        
        ShowLoginPanel();
        
        if (loadingPanel != null)
            loadingPanel.SetActive(false);
    }

    private void ConfigurePasswordInputs()
    {
        ConfigurePasswordInput(passwordInput);
        ConfigurePasswordInput(registerPasswordInput);
    }

    private void ConfigurePasswordInput(InputField input)
    {
        if (input == null) return;

        input.contentType = InputField.ContentType.Password;
        input.inputType = InputField.InputType.Password;
        input.asteriskChar = '*';
        input.ForceLabelUpdate();
    }
    
    private void OnLoginButtonClicked()
    {
        string username = usernameInput.text.Trim();
        string password = passwordInput.text;
        
        if (string.IsNullOrEmpty(username))
        {
            ShowLoginMessage("请输入用户名！", Color.red);
            return;
        }
        
        if (string.IsNullOrEmpty(password))
        {
            ShowLoginMessage("请输入密码！", Color.red);
            return;
        }
        
        ShowLoading("正在登录...");
        
        loginManager.Login(username, password, 
            onSuccess: (userData) =>
            {
                HideLoading();
                ShowLoginMessage("登录成功！", Color.green);
            },
            onError: (error) =>
            {
                HideLoading();
                ShowLoginMessage($"登录失败: {error}", Color.red);
            }
        );
    }
    
    private void OnRegisterButtonClicked()
    {
        string username = registerUsernameInput.text.Trim();
        string password = registerPasswordInput.text;
        string email = registerEmailInput.text.Trim();
        
        if (string.IsNullOrEmpty(username))
        {
            ShowRegisterMessage("请输入用户名！", Color.red);
            return;
        }
        
        if (string.IsNullOrEmpty(password))
        {
            ShowRegisterMessage("请输入密码！", Color.red);
            return;
        }
        
        if (string.IsNullOrEmpty(email))
        {
            ShowRegisterMessage("请输入邮箱！", Color.red);
            return;
        }
        
        if (!IsValidEmail(email))
        {
            ShowRegisterMessage("邮箱格式不正确！", Color.red);
            return;
        }
        
        ShowLoading("正在注册...");
        
        loginManager.Register(username, password, email,
            onSuccess: (userData) =>
            {
                HideLoading();
                ShowRegisterMessage("注册成功！请登录", Color.green);
                ShowLoginPanel();
            },
            onError: (error) =>
            {
                HideLoading();
                ShowRegisterMessage($"注册失败: {error}", Color.red);
            }
        );
    }
    
    private void OnGuestButtonClicked()
    {
        ShowLoading("正在进入游客模式...");
        
        loginManager.GuestLogin(
            onSuccess: (userData) =>
            {
                HideLoading();
                ShowLoginMessage("游客模式启动成功！", Color.green);
            },
            onError: (error) =>
            {
                HideLoading();
                ShowLoginMessage($"游客模式启动失败: {error}", Color.red);
            }
        );
    }
    
    private void ShowLoginPanel()
    {
        if (loginPanel != null)
            loginPanel.SetActive(true);
        
        if (registerPanel != null)
            registerPanel.SetActive(false);
        
        ClearInputs();
    }
    
    private void ShowRegisterPanel()
    {
        if (loginPanel != null)
            loginPanel.SetActive(false);
        
        if (registerPanel != null)
            registerPanel.SetActive(true);
        
        ClearInputs();
    }
    
    private void ShowLoginMessage(string message, Color color)
    {
        if (loginMessageText != null)
        {
            loginMessageText.text = message;
            loginMessageText.color = color;
        }
    }
    
    private void ShowRegisterMessage(string message, Color color)
    {
        if (registerMessageText != null)
        {
            registerMessageText.text = message;
            registerMessageText.color = color;
        }
    }
    
    private void ShowLoading(string message)
    {
        if (loadingPanel != null)
        {
            loadingPanel.SetActive(true);
            if (loadingText != null)
                loadingText.text = message;
        }
    }
    
    private void HideLoading()
    {
        if (loadingPanel != null)
            loadingPanel.SetActive(false);
    }
    
    private void ClearInputs()
    {
        if (usernameInput != null)
            usernameInput.text = "";
        
        if (passwordInput != null)
            passwordInput.text = "";
        
        if (registerUsernameInput != null)
            registerUsernameInput.text = "";
        
        if (registerPasswordInput != null)
            registerPasswordInput.text = "";
        
        if (registerEmailInput != null)
            registerEmailInput.text = "";
        
        if (loginMessageText != null)
            loginMessageText.text = "";
        
        if (registerMessageText != null)
            registerMessageText.text = "";
    }
    
    private bool IsValidEmail(string email)
    {
        try
        {
            var addr = new System.Net.Mail.MailAddress(email);
            return addr.Address == email;
        }
        catch
        {
            return false;
        }
    }
}