import 'package:flutter/material.dart';
import 'package:flutter_markdown/flutter_markdown.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:get/get.dart';

import '../controllers/meeting_details_controller.dart';

class AIBottomSheet extends StatefulWidget {
  const AIBottomSheet({super.key});

  @override
  State<AIBottomSheet> createState() => _AIBottomSheetState();
}

class _AIBottomSheetState extends State<AIBottomSheet> {
  final _controller = Get.find<MeetingDetailsController>();

  final TextEditingController _texController = TextEditingController();

  List _dataList = [];

  final List _cruxList = [
    '添加代办事项',
    '提取结论',
    '生成关键指标',
  ];

  bool _isLoading = false;

  @override
  void dispose() {
    _texController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: EdgeInsets.symmetric(horizontal: 12.w),
      constraints: BoxConstraints(
        maxHeight: 1.sh - 50.h - MediaQuery.of(context).viewInsets.bottom,
      ),
      child: Column(
        children: [
          Container(
            padding: EdgeInsets.symmetric(vertical: 10.w),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                26.horizontalSpace,
                Text(
                  'Ask AI',
                  style: TextStyle(
                    fontSize: 16.sp,
                    color: Colors.black87,
                    fontWeight: FontWeight.bold,
                  ),
                ),
                GestureDetector(
                  onTap: () => Get.back(),
                  child: Container(
                    width: 26.w,
                    height: 26.w,
                    decoration: BoxDecoration(
                      color: Colors.grey[100],
                      borderRadius: BorderRadius.circular(26.r),
                    ),
                    child: Icon(
                      Icons.close,
                      size: 18.w,
                      color: Colors.grey[400],
                    ),
                  ),
                ),
              ],
            ),
          ),
          Expanded(
            child: _dataList.isNotEmpty
                ? Align(
                    alignment: Alignment.topCenter,
                    child: ListView.builder(
                      itemCount: _dataList.length,
                      shrinkWrap: true,
                      reverse: true,
                      itemBuilder: (BuildContext context, int index) {
                        Map data = _dataList[index];
                        return _item(data, index == 0);
                      },
                    ),
                  )
                : _empty(),
          ),
          _inputBox(),
        ],
      ),
    );
  }

  Widget _item(Map data, bool isBorder) {
    return Container(
      padding: EdgeInsets.symmetric(vertical: 20.w),
      decoration: BoxDecoration(
        border: isBorder
            ? null
            : Border(
                bottom: BorderSide(
                  width: 1,
                  color: Colors.grey[400]!,
                ),
              ),
      ),
      child: Column(
        children: [
          Align(
            alignment: Alignment.centerRight,
            child: Container(
              padding: EdgeInsets.all(10.w),
              decoration: BoxDecoration(
                color: Colors.grey[200],
                borderRadius: BorderRadius.circular(12.r),
              ),
              child: Text(
                data['user'],
                style: TextStyle(
                  fontSize: 14.sp,
                ),
              ),
            ),
          ),
          if (data['assistant'].isNotEmpty)
            Container(
              padding: EdgeInsets.symmetric(vertical: 20.w),
              alignment: Alignment.centerLeft,
              child: MarkdownBody(
                data: data['assistant'],
              ),
            ),
        ],
      ),
    );
  }

  Widget _empty() {
    return Padding(
      padding: EdgeInsets.symmetric(vertical: 10.w),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            '今天我能帮您做点什么呢？',
            style: TextStyle(
              fontSize: 18.sp,
              fontWeight: FontWeight.bold,
            ),
          ),
          Padding(
            padding: EdgeInsets.only(top: 10.w, bottom: 30.w),
            child: Row(
              children: [
                Icon(
                  Icons.audio_file_outlined,
                  size: 14.w,
                  color: Colors.grey[500],
                ),
                2.horizontalSpace,
                Text(
                  _controller.meetingData.value.title,
                  style: TextStyle(
                    color: Colors.grey[500],
                    fontSize: 12.sp,
                  ),
                ),
              ],
            ),
          ),
          ...List.generate(
            _cruxList.length,
            (int index) => GestureDetector(
              onTap: () {
                _sendMessage(_cruxList[index]);
              },
              child: Container(
                width: double.infinity,
                padding: EdgeInsets.symmetric(horizontal: 15.w, vertical: 8.w),
                margin: EdgeInsets.symmetric(vertical: 5.w),
                decoration: BoxDecoration(
                  color: Colors.grey[100],
                  borderRadius: BorderRadius.circular(20.r),
                  border: Border.all(
                    color: Colors.grey[300]!,
                  ),
                ),
                child: Text(
                  _cruxList[index],
                  style: TextStyle(fontSize: 12.sp),
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }

  Widget _inputBox() {
    return Container(
      height: 42.w,
      padding: EdgeInsets.symmetric(horizontal: 10.w),
      margin: EdgeInsets.only(bottom: 10.w),
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(42.r),
        gradient: LinearGradient(
          begin: Alignment.centerLeft,
          end: Alignment.centerRight,
          colors: [
            const Color(0xFFab47bc).withOpacity(0.1), // 薰衣草紫
            const Color(0xFFec407a).withOpacity(0.2), // 品红
          ],
        ),
      ),
      child: Row(
        children: [
          5.horizontalSpace,
          Expanded(
            child: TextField(
              controller: _texController,
              style: TextStyle(
                fontSize: 16.sp,
                color: Colors.black87,
                letterSpacing: 0,
                height: 1.4,
              ),
              decoration: InputDecoration(
                hintText: '问 AI ...',
                hintStyle: TextStyle(
                  fontSize: 16.sp,
                  color: Colors.grey[400],
                  letterSpacing: 0,
                  height: 1.4,
                ),
                isDense: true,
                fillColor: Colors.transparent,
                border: InputBorder.none,
                contentPadding: EdgeInsets.zero,
              ),
              onSubmitted: _sendMessage,
            ),
          ),
          10.horizontalSpace,
          GestureDetector(
            onTap: () {
              _sendMessage(_texController.text);
            },
            child: Container(
              width: 26.w,
              height: 26.w,
              decoration: BoxDecoration(
                color: Colors.grey,
                borderRadius: BorderRadius.circular(26.r),
              ),
              child: Icon(
                Icons.arrow_upward,
                size: 18.w,
                color: Colors.white,
              ),
            ),
          ),
        ],
      ),
    );
  }

  void _sendMessage(String value) {
    if (_isLoading || value.isEmpty) return;
    setState(() {
      _isLoading = true;
    });
    _dataList.insert(0, {
      'user': value,
      'assistant': '''
# 角色
你是一名卓越的会议记录专家，拥有超强的信息归纳与细分能力。不仅能高效处理各类通用场景会议，精准提炼会议核心内容，为后续思维导图生成奠定坚实基础，还能将整理好的会议记录巧妙转化为清晰直观的思维导图。

## 技能
### 技能 1: 通用会议内容深度细分
1. 深入全面剖析给定的通用场景会议内容，精准区分不同主题板块，如会议目标、讨论事项、决策结果、行动安排、问题与挑战等。
2. 对每个主题板块进行细致分解，形成具体要点与细节。若涉及人员，人员名称保留[]，清晰明确其角色与贡献；涉及流程，梳理出关键步骤与节点。
3. 以层次分明、逻辑紧密的方式整理细分内容，使其契合思维导图的结构特点。
===回复示例===
- **会议目标**：
    - 目标 1：[详细且全面阐述目标 1]
    - 目标 2：[如有多个目标，依次详细罗列]
- **讨论事项**：
    - 事项 1：
        - 观点 1：[详细说明提出观点 1 的人员及具体内容]
        - 观点 2：[详细阐述不同观点及相关人员]
    - 事项 2：[按此格式详细罗列其他讨论事项]
- **决策结果**：
    - 决策 1：[具体且完整表述决策内容]
    - 决策 2：[详细列出其他决策]
- **行动安排**：
    - 任务 1：
        - 负责人：[具体姓名]
        - 时间节点：[精确到具体时间]
        - 任务内容：[详细描述任务具体内容]
    - 任务 2：[依此格式详细罗列其他任务]
- **问题与挑战**：
    - 问题 1：[具体清晰描述问题]
    - 挑战 1：[详细说明面临的挑战及相关说明]
===示例结束===
''',
    });
    _texController.clear();
    setState(() {
      _isLoading = false;
    });
  }
}