using TMPro;
using UnityEngine;
using UnityEngine.UI;

/// <summary>
/// 适配器：让 CustomKeyboard 可以直接操作 TMP_InputField
/// 实现类似 InputDialog 的接口但实际修改 InputField
/// </summary>
public class KeyboardInputAdapter : MonoBehaviour
{
    private TMP_InputField _inputField;
    private object _manager; // CustomKeyboardManager，使用 object 避免循环引用
    public Button ConfirmButton; // 虚拟确认按钮
    private bool _shouldClearOnFirstInput = false; // 是否在首次输入时清空
    private bool _hasInputOccurred = false; // 是否已经发生过输入

    public void SetTarget(TMP_InputField inputField, object manager, bool clearOnFirstInput = false)
    {
        _inputField = inputField;
        _manager = manager;
        _shouldClearOnFirstInput = clearOnFirstInput;
        _hasInputOccurred = false;

        // 创建虚拟确认按钮（CustomKeyboard 需要）
        var btnGO = new GameObject("VirtualConfirmButton", typeof(Button));
        btnGO.transform.SetParent(this.transform, false);
        ConfirmButton = btnGO.GetComponent<Button>();
        
        // 使用反射调用 manager 的 ConfirmInput 方法
        ConfirmButton.onClick.AddListener(() => {
            if (_manager != null)
            {
                var method = _manager.GetType().GetMethod("ConfirmInput");
                method?.Invoke(_manager, null);
            }
        });
        
        btnGO.SetActive(false); // 隐藏，只用于事件
    }

    public void OnKeyPressed(string key)
    {
        if (_inputField != null)
        {
            // 如果设置了首次清空且还未输入过，先清空
            if (_shouldClearOnFirstInput && !_hasInputOccurred)
            {
                _inputField.text = "";
                _hasInputOccurred = true;
            }
            
            _inputField.text += key;
        }
    }

    public void OnBackspacePressed()
    {
        if (_inputField != null && _inputField.text.Length > 0)
        {
            _inputField.text = _inputField.text.Substring(0, _inputField.text.Length - 1);
        }
    }

    public void OnClearPressed()
    {
        if (_inputField != null)
        {
            _inputField.text = "";
        }
    }
}