using System.Collections;
using System.Collections.Generic;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

/// <summary>
/// 添加用户面板
/// 提供用户名、密码和角色选择功能
/// </summary>
public class AddUserPanel : BasePanel
{
    [Header("输入字段")]
    public TMP_InputField UsernameInput; // 用户名输入框
    public TMP_InputField PasswordInput; // 密码输入框
    public TMP_InputField ConfirmPasswordInput; // 确认密码输入框
    public TMP_Dropdown RoleDropdown; // 角色下拉框
    
    // [Header("显示标签")]
    // public TextMeshProUGUI UsernameLabel;
    // public TextMeshProUGUI PasswordLabel;
    // public TextMeshProUGUI ConfirmPasswordLabel;
    // public TextMeshProUGUI RoleLabel;
    public TextMeshProUGUI StatusText; // 状态显示文本

    [Header("操作按钮")]
    public Button HomeButton;
    public Button AddButton; // 添加按钮
    // public Button CancelButton; // 取消按钮
    public Button BackButton; // 返回按钮
    
    [Header("验证设置")]
    public int MinUsernameLength = 3;
    public int MinPasswordLength = 6;
    
    private IAuthenticationService _authService;
    
    public override void Init()
    {
        _authService = ServiceLocator.Get<IAuthenticationService>();
        
        InitializeUI();
        SetupValidation();
        ClearInputs();
    }
    
    private void InitializeUI()
    {
        // 设置标签文本
        // if (UsernameLabel != null) UsernameLabel.text = "用户名:";
        // if (PasswordLabel != null) PasswordLabel.text = "密码:";
        // if (ConfirmPasswordLabel != null) ConfirmPasswordLabel.text = "确认密码:";
        // if (RoleLabel != null) RoleLabel.text = "角色:";
        
        // 初始化角色下拉框
        if (RoleDropdown != null)
        {
            RoleDropdown.ClearOptions();
            var options = new List<string> { "普通用户", "管理员" };
            RoleDropdown.AddOptions(options);
            RoleDropdown.value = 0; // 默认选择普通用户
        }
        
        // 设置密码输入框为密码模式
        if (PasswordInput != null)
        {
            PasswordInput.contentType = TMP_InputField.ContentType.Password;
        }
        
        if (ConfirmPasswordInput != null)
        {
            ConfirmPasswordInput.contentType = TMP_InputField.ContentType.Password;
        }

        // 设置按钮事件
        if (HomeButton != null)
        {
            HomeButton.onClick.AddListener(() =>
            {
                ReturnToHome();
            });
        }

        if (AddButton != null)
        {
            AddButton.onClick.AddListener(OnAddButtonClicked);
        }
        
        // if (CancelButton != null)
        // {
        //     CancelButton.onClick.AddListener(OnCancelButtonClicked);
        // }
        
        if (BackButton != null)
        {
            BackButton.onClick.AddListener(OnBackButtonClicked);
        }
    }
    
    private void SetupValidation()
    {
        // 添加输入验证监听器和自定义键盘
        if (UsernameInput != null)
        {
            UsernameInput.onValueChanged.AddListener(OnInputChanged);
            CustomKeyboardManager.SetupInputField(UsernameInput, KeyboardLayout.Default,
                (newValue) => 
                {
                    UsernameInput.text = newValue;
                    OnInputChanged(newValue);
                },
                clearOnFirstInput: true);
        }
        
        if (PasswordInput != null)
        {
            PasswordInput.onValueChanged.AddListener(OnInputChanged);
            CustomKeyboardManager.SetupInputField(PasswordInput, KeyboardLayout.Default,
                (newValue) => 
                {
                    PasswordInput.text = newValue;
                    OnInputChanged(newValue);
                },
                clearOnFirstInput: true);
        }
        
        if (ConfirmPasswordInput != null)
        {
            ConfirmPasswordInput.onValueChanged.AddListener(OnInputChanged);
            CustomKeyboardManager.SetupInputField(ConfirmPasswordInput, KeyboardLayout.Default,
                (newValue) => 
                {
                    ConfirmPasswordInput.text = newValue;
                    OnInputChanged(newValue);
                },
                clearOnFirstInput: true);
        }
    }
    
    private void OnInputChanged(string value)
    {
        ValidateInputs();
    }
    
    private bool ValidateInputs()
    {
        string username = UsernameInput?.text ?? "";
        string password = PasswordInput?.text ?? "";
        string confirmPassword = ConfirmPasswordInput?.text ?? "";
        
        // 验证用户名
        if (string.IsNullOrEmpty(username))
        {
            SetStatus("请输入用户名", false);
            return false;
        }
        
        if (username.Length < MinUsernameLength)
        {
            SetStatus($"用户名至少需要{MinUsernameLength}个字符", false);
            return false;
        }
        
        // 检查用户名是否已存在
        if (_authService != null)
        {
            var existingUsers = _authService.GetAllUsers();
            if (existingUsers.Exists(u => u.Username.Equals(username, System.StringComparison.OrdinalIgnoreCase)))
            {
                SetStatus("用户名已存在", false);
                return false;
            }
        }
        
        // 验证密码
        if (string.IsNullOrEmpty(password))
        {
            SetStatus("请输入密码", false);
            return false;
        }
        
        if (password.Length < MinPasswordLength)
        {
            SetStatus($"密码至少需要{MinPasswordLength}个字符", false);
            return false;
        }
        
        // 验证确认密码
        if (password != confirmPassword)
        {
            SetStatus("两次输入的密码不一致", false);
            return false;
        }
        
        SetStatus("输入验证通过", true);
        return true;
    }
    
    private void SetStatus(string message, bool isSuccess)
    {
        if (StatusText != null)
        {
            StatusText.text = message;
            StatusText.color = isSuccess ? Color.green : Color.red;
        }
        
        // 根据验证结果启用/禁用添加按钮
        if (AddButton != null)
        {
            AddButton.interactable = isSuccess;
        }
    }
    
    private void OnAddButtonClicked()
    {
        if (!ValidateInputs()) return;
        
        string username = UsernameInput.text;
        string password = PasswordInput.text;
        UserRole role = RoleDropdown.value == 0 ? UserRole.User : UserRole.Admin;
        
        // 显示确认对话框
        ConfirmDialog.ShowSaveConfirm(
            $"确定要添加用户 '{username}' 吗？\n角色: {(role == UserRole.Admin ? "管理员" : "普通用户")}",
            () => AddUser(username, password, role),
            () => Debug.Log("取消添加用户")
        );
    }
    
    private void AddUser(string username, string password, UserRole role)
    {
        if (_authService == null)
        {
            SetStatus("认证服务不可用", false);
            return;
        }
        
        bool success = _authService.AddUser(username, password, role);
        
        if (success)
        {
            SetStatus("用户添加成功！", true);
            Debug.Log($"成功添加用户: {username} ({role})");
            
            // 延迟关闭面板
            StartCoroutine(CloseAfterDelay(1.5f));
        }
        else
        {
            SetStatus("添加用户失败", false);
        }
    }
    
    private System.Collections.IEnumerator CloseAfterDelay(float delay)
    {
        yield return new WaitForSeconds(delay);
        ClosePanel();
    }
    
    private void OnCancelButtonClicked()
    {
        if (HasUnsavedChanges())
        {
            ConfirmDialog.Show("确认取消", "确定要取消添加用户吗？已输入的信息将丢失。",
                () => UIManager.Instance.HidePanel<AddUserPanel>(), null, "确认", "继续编辑", true);
        }
        else
        {
            ClosePanel();
        }
    }
    
    private void OnBackButtonClicked()
    {
        OnCancelButtonClicked(); // 和取消按钮相同逻辑
    }
    
    private bool HasUnsavedChanges()
    {
        return !string.IsNullOrEmpty(UsernameInput?.text) || 
               !string.IsNullOrEmpty(PasswordInput?.text) || 
               !string.IsNullOrEmpty(ConfirmPasswordInput?.text);
    }
    
    private void ClearInputs()
    {
        if (UsernameInput != null) UsernameInput.text = "";
        if (PasswordInput != null) PasswordInput.text = "";
        if (ConfirmPasswordInput != null) ConfirmPasswordInput.text = "";
        if (RoleDropdown != null) RoleDropdown.value = 0;
        
        SetStatus("请填写用户信息", true);
    }
    
    // public void ClosePanel()
    // {
    //     UIManager.Instance.HidePanel<AddUserPanel>();
    // }
    
    void OnDestroy()
    {
        // 清理事件监听器
        if (UsernameInput != null)
            UsernameInput.onValueChanged.RemoveListener(OnInputChanged);
        if (PasswordInput != null)
            PasswordInput.onValueChanged.RemoveListener(OnInputChanged);
        if (ConfirmPasswordInput != null)
            ConfirmPasswordInput.onValueChanged.RemoveListener(OnInputChanged);
        // 关闭自定义键盘（如果正在显示）
        if (CustomKeyboardManager.Instance != null && CustomKeyboardManager.Instance.IsKeyboardShowing())
        {
            CustomKeyboardManager.Instance.HideKeyboard();
        }
    }
}