import 'package:flutter/material.dart';
import 'package:qhd_prevention/customWidget/custom_alert_dialog.dart';
import 'package:qhd_prevention/customWidget/custom_button.dart';

class MultiTextFieldWithTitle extends StatefulWidget {
  final String label;
  final List<String> texts;
  final bool isEditable;
  final String hintText;
  final double fontSize;
  final bool isRequired;
  final ValueChanged<List<String>> onTextsChanged;

  const MultiTextFieldWithTitle({
    super.key,
    required this.label,
    required this.isEditable,
    required this.hintText,
    required this.onTextsChanged,
    this.fontSize = 15,
     this.texts = const [],
    this.isRequired = true,
  });

  @override
  State<MultiTextFieldWithTitle> createState() =>
      _MultiTextFieldWithTitleState();
}

class _MultiTextFieldWithTitleState extends State<MultiTextFieldWithTitle> {
  final List<TextEditingController> _controllers = [];
  final List<FocusNode> _focusNodes = [];

  @override
  void initState() {
    super.initState();
    // 延迟初始化，避免构建过程中调用 setState
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (mounted) {
        _addTextField();
      }
    });
  }

  @override
  void dispose() {
    for (var controller in _controllers) {
      controller.dispose();
    }
    for (var node in _focusNodes) {
      node.dispose();
    }
    super.dispose();
  }

  void _addTextField() {
    setState(() {
      final newController = TextEditingController();
      final newFocusNode = FocusNode();

      newController.addListener(() {
        widget.onTextsChanged(_getAllTexts());
      });

      _controllers.add(newController);
      _focusNodes.add(newFocusNode);
      widget.onTextsChanged(_getAllTexts());
    });
  }

  void _removeTextField(int index) async {
    if (_controllers.length <= 1) return;
    await showDialog<String>(
      context: context,
      builder:
          (_) => CustomAlertDialog(
            title: '提示',
            mode: DialogMode.text,
            content: '确定删除检查情况吗？',
            cancelText: '取消',
            confirmText: '确定',
            onConfirm: () {
              setState(() {
                _controllers[index].dispose();
                _focusNodes[index].dispose();

                _controllers.removeAt(index);
                _focusNodes.removeAt(index);
                widget.onTextsChanged(_getAllTexts());
              });
            },
          ),
    );
  }

  List<String> _getAllTexts() {
    return _controllers.map((c) => c.text).toList();
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(vertical: 5, horizontal: 12),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // 标题行
          InkWell(
            child: Row(
              children: [
                Flexible(
                  fit: FlexFit.loose,
                  child: Row(
                    children: [
                      if (widget.isRequired && widget.isEditable)
                        Text('* ', style: TextStyle(color: Colors.red)),
                      Flexible(
                        child: Text(
                          widget.label,
                          style: TextStyle(
                            fontSize: widget.fontSize,
                            fontWeight: FontWeight.bold,
                          ),
                          maxLines: 1,
                          overflow: TextOverflow.ellipsis,
                        ),
                      ),
                    ],
                  ),
                ),
                const SizedBox(width: 8),
                if (widget.isEditable)
                  CustomButton(
                    text: "   添加   ",
                    height: 30,
                    padding: const EdgeInsets.symmetric(
                      vertical: 2,
                      horizontal: 5,
                    ),
                    backgroundColor: Colors.blue,
                    onPressed: _addTextField,
                  ),
              ],
            ),
          ),
          const SizedBox(height: 8),

          // 输入框区域 - 高度自适应
          Column(
            children: [
              // 可编辑状态
              if (widget.isEditable)
                ..._controllers.asMap().entries.map((entry) {
                  final index = entry.key;
                  return _buildTextFieldWithDelete(index);
                }).toList(),

              // 不可编辑状态
              if (!widget.isEditable)
                ...widget.texts.map((c) {
                  return Padding(
                    padding: const EdgeInsets.only(bottom: 8.0),
                    child: Container(
                      padding: const EdgeInsets.all(12),
                      width: double.maxFinite,
                      decoration: BoxDecoration(
                        border: Border.all(color: Colors.grey),
                        borderRadius: BorderRadius.circular(4),
                      ),
                      child: Text(
                        c,
                        style: TextStyle(
                          fontSize: widget.fontSize,
                          color: Colors.grey[600],
                        ),
                      ),
                    ),
                  );
                }).toList(),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildTextFieldWithDelete(int index) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 8.0),
      child: Stack(
        children: [
          // 输入框
          Padding(
            padding: EdgeInsets.symmetric(horizontal: 7, vertical: 7),
            child: Container(
              decoration: BoxDecoration(
                border: BoxBorder.all(color: Colors.grey.shade300, width: 1),
                borderRadius: BorderRadius.circular(4),
              ),
              padding: EdgeInsets.symmetric(vertical: 10),
              child: TextField(
                controller: _controllers[index],
                decoration: InputDecoration(hintText: widget.hintText),
                focusNode: _focusNodes[index],
                keyboardType: TextInputType.multiline,
                maxLines: 3,
                minLines: 3,
                style: TextStyle(fontSize: widget.fontSize),
              ),
            ),
          ),

          // 删除按钮（叠加在左上角）
          if (index > 0)
            Positioned(
              top: 0,
              left: 0,
              child: GestureDetector(
                onTap: () => _removeTextField(index),
                child: Container(
                  decoration: BoxDecoration(
                    color: Colors.red,
                    borderRadius: BorderRadius.circular(12),
                  ),
                  padding: const EdgeInsets.all(4),
                  child: const Icon(Icons.close, size: 10, color: Colors.white),
                ),
              ),
            ),
        ],
      ),
    );
  }
}