import 'package:common_utils/common_utils.dart';
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 '../../../data/services/db/sqflite_api.dart';
import '../controllers/meeting_details_controller.dart';
import 'ai_bottom_sheet.dart';
import 'generate_bottom_sheet.dart';
import 'speaker_all_bottom_sheet.dart';

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

  @override
  State<SummaryTab> createState() => _SummaryTabState();
}

class _SummaryTabState extends State<SummaryTab> {
  final _controller = Get.find<MeetingDetailsController>();
  final String _addressPrefix = '地点：';
  String _addressText = '';
  final String _personnelPrefix = '与会人员：';
  String _personnelText = '';
  final TextEditingController _addressController = TextEditingController();
  final TextEditingController _personnelController = TextEditingController();

  @override
  void initState() {
    super.initState();
    _addressController.text = _addressPrefix +
        (_controller.meetingDetails.value.address.isNotEmpty
            ? _controller.meetingDetails.value.address
            : '[输入地点]');
    _personnelController.text = _personnelPrefix +
        (_controller.meetingDetails.value.personnel.isNotEmpty
            ? _controller.meetingDetails.value.personnel
            : '[输入与会人员]');
    _addressController.addListener(_handleAddressChanged);
    _personnelController.addListener(_handlePersonnelChanged);
  }

  void _handleAddressChanged() {
    String currentText = _addressController.text;
    TextSelection currentSelection = _addressController.selection;
    if (!currentText.startsWith(_addressPrefix)) {
      _addressController.value = TextEditingValue(
        text: _addressPrefix + _addressText,
        selection: TextSelection.collapsed(
          offset: _addressPrefix.length + _addressText.length,
        ),
      );
      return;
    } else {
      _addressText = currentText.substring(_addressPrefix.length);
    }

    if (currentSelection.start < _addressPrefix.length ||
        currentSelection.end < _addressPrefix.length) {
      int newStart = currentSelection.start < _addressPrefix.length
          ? _addressPrefix.length
          : currentSelection.start;
      int newEnd = currentSelection.end < _addressPrefix.length
          ? _addressPrefix.length
          : currentSelection.end;
      _addressController.selection = currentSelection.copyWith(
        baseOffset: newStart,
        extentOffset: newEnd,
      );
    }
  }

  void _handlePersonnelChanged() {
    String currentText = _personnelController.text;
    TextSelection currentSelection = _personnelController.selection;
    if (!currentText.startsWith(_personnelPrefix)) {
      _personnelController.value = TextEditingValue(
        text: _personnelPrefix + _personnelText,
        selection: TextSelection.collapsed(
          offset: _personnelPrefix.length + _personnelText.length,
        ),
      );
      return;
    } else {
      _personnelText = currentText.substring(_personnelPrefix.length);
    }

    if (currentSelection.start < _personnelPrefix.length ||
        currentSelection.end < _personnelPrefix.length) {
      int newStart = currentSelection.start < _personnelPrefix.length
          ? _personnelPrefix.length
          : currentSelection.start;
      int newEnd = currentSelection.end < _personnelPrefix.length
          ? _personnelPrefix.length
          : currentSelection.end;
      _personnelController.selection = currentSelection.copyWith(
        baseOffset: newStart,
        extentOffset: newEnd,
      );
    }
  }

  @override
  void dispose() {
    _addressController.dispose();
    _personnelController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final isDarkMode = Theme.of(context).brightness == Brightness.dark;
    final TextStyle textStyle = TextStyle(
      color: isDarkMode ? Colors.grey[400] : Colors.grey[700],
      fontSize: 16.sp,
      letterSpacing: 0,
      height: 1.5,
    );

    return Stack(
      children: [
        SingleChildScrollView(
          padding: EdgeInsets.only(bottom: 80.w),
          child: Obx(
            () => Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Padding(
                  padding: EdgeInsets.symmetric(vertical: 10.w),
                  child: Text(
                    _controller.meetingData.value.title,
                    style: TextStyle(
                      fontSize: 20.sp,
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                ),
                Row(
                  children: [
                    Container(
                      padding:
                          EdgeInsets.symmetric(horizontal: 5.w, vertical: 2.w),
                      margin: EdgeInsets.only(right: 10.w),
                      decoration: BoxDecoration(
                        color: isDarkMode ? Colors.grey[900] : Colors.grey[200],
                        borderRadius: BorderRadius.circular(4.w),
                      ),
                      child: Text(
                        _controller.meetingData.value.type,
                        style: TextStyle(
                          color:
                              isDarkMode ? Colors.grey[400] : Colors.grey[500],
                          fontSize: 10.sp,
                        ),
                      ),
                    ),
                    Icon(
                      Icons.calendar_month,
                      size: 14.w,
                      color: isDarkMode ? Colors.grey[400] : Colors.grey[500],
                    ),
                    2.horizontalSpace,
                    Text(
                      DateUtil.formatDateMs(
                        _controller.meetingData.value.creationtime,
                        format: DateFormats.y_mo_d_h_m,
                      ),
                      style: TextStyle(
                        color: isDarkMode ? Colors.grey[400] : Colors.grey[500],
                        fontSize: 12.sp,
                      ),
                    ),
                    10.horizontalSpace,
                    Icon(
                      Icons.access_time,
                      size: 14.w,
                      color: isDarkMode ? Colors.grey[400] : Colors.grey[500],
                    ),
                    2.horizontalSpace,
                    Text(
                      '${_controller.meetingData.value.seconds}s',
                      style: TextStyle(
                        color: isDarkMode ? Colors.grey[400] : Colors.grey[500],
                        fontSize: 12.sp,
                      ),
                    ),
                  ],
                ),
                Padding(
                  padding: EdgeInsets.symmetric(vertical: 10.w),
                  child: Divider(
                    height: 1,
                    color: isDarkMode ? Colors.grey[900] : Colors.grey[300],
                  ),
                ),
                Container(
                  padding: EdgeInsets.only(left: 20.w),
                  margin: EdgeInsets.symmetric(vertical: 10.w),
                  decoration: BoxDecoration(
                    border: Border(
                      left: BorderSide(
                        width: 2,
                        color: isDarkMode
                            ? Colors.white.withOpacity(0.1)
                            : Colors.grey[300]!,
                      ),
                    ),
                  ),
                  child: Focus(
                    onFocusChange: (bool hasFocus) {
                      if (!hasFocus) {
                        bool isEdit = false;
                        if (_addressText.isNotEmpty &&
                            _addressText !=
                                _controller.meetingDetails.value.address) {
                          _controller.meetingDetails.value.address =
                              _addressText;
                          isEdit = true;
                        }
                        if (_personnelText.isNotEmpty &&
                            _personnelText !=
                                _controller.meetingDetails.value.personnel) {
                          _controller.meetingDetails.value.personnel =
                              _personnelText;
                          isEdit = true;
                        }
                        if (isEdit) {
                          SqfliteApi.editMeeting(
                            _controller.id,
                            {
                              'address':
                                  _controller.meetingDetails.value.address,
                              'personnel':
                                  _controller.meetingDetails.value.personnel,
                            },
                          );
                        }
                      }
                    },
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(
                          '日期和时间：${DateUtil.formatDateMs(
                            _controller.meetingData.value.creationtime,
                            format: DateFormats.y_mo_d_h_m,
                          )}',
                          style: textStyle,
                        ),
                        TextField(
                          controller: _addressController,
                          style: textStyle,
                          minLines: 1,
                          maxLines: 100,
                          decoration: const InputDecoration(
                            isDense: true,
                            fillColor: Colors.transparent,
                            border: InputBorder.none,
                            contentPadding: EdgeInsets.zero,
                          ),
                        ),
                        TextField(
                          controller: _personnelController,
                          style: textStyle,
                          minLines: 1,
                          maxLines: 100,
                          decoration: const InputDecoration(
                            isDense: true,
                            fillColor: Colors.transparent,
                            border: InputBorder.none,
                            contentPadding: EdgeInsets.zero,
                          ),
                        ),
                      ],
                    ),
                  ),
                ),
                Padding(
                  padding: EdgeInsets.only(top: 10.w),
                  child: MarkdownBody(
                    data: _controller.meetingDetails.value.summary,
                  ),
                ),
              ],
            ),
          ),
        ),
        Obx(
          () => Positioned(
            bottom: 20.w,
            left: 0,
            right: 0,
            child: Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                if (_controller.meetingDetails.value.tasktype >= 3)
                  _button(
                    Icons.supervisor_account,
                    '编辑发言者',
                    () {
                      Get.bottomSheet(
                        const SpeakerAllBottomSheet(),
                        isScrollControlled: true,
                        backgroundColor: Colors.grey[100],
                        shape: RoundedRectangleBorder(
                          borderRadius: BorderRadius.vertical(
                            top: Radius.circular(12.r),
                          ),
                        ),
                      );
                    },
                  ),
                if (_controller.meetingDetails.value.tasktype >= 3)
                  _button(
                    Icons.auto_awesome,
                    'Ask AI',
                    () {
                      Get.bottomSheet(
                        const AIBottomSheet(),
                        isScrollControlled: true,
                        backgroundColor: Colors.white,
                        shape: RoundedRectangleBorder(
                          borderRadius: BorderRadius.vertical(
                            top: Radius.circular(12.r),
                          ),
                        ),
                      );
                    },
                  ),
                if (_controller.meetingDetails.value.tasktype == 0)
                  SizedBox(
                    width: 150.w,
                    child: _button(
                      Icons.auto_awesome,
                      '生成',
                      () {
                        Get.bottomSheet(
                          const GenerateBottomSheet(),
                          isScrollControlled: true,
                          backgroundColor: Colors.grey[100],
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.vertical(
                              top: Radius.circular(12.r),
                            ),
                          ),
                        );
                      },
                    ),
                  ),
              ],
            ),
          ),
        ),
      ],
    );
  }

  Widget _button(IconData icon, String title, Function() onTap) {
    return GestureDetector(
      onTap: onTap,
      child: Container(
        height: 42.w,
        padding: EdgeInsets.symmetric(horizontal: 15.w),
        margin: EdgeInsets.symmetric(horizontal: 4.w),
        decoration: BoxDecoration(
          color: Colors.black,
          borderRadius: BorderRadius.circular(42.w),
        ),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Icon(
              icon,
              color: Colors.white,
              size: 20.sp,
            ),
            5.horizontalSpace,
            Text(
              title,
              style: TextStyle(
                color: Colors.white,
                fontSize: 14.sp,
              ),
            ),
          ],
        ),
      ),
    );
  }
}