import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter_common/flutter_common.dart';
import 'package:get/get.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      title: 'flutter_common Demo',
      debugShowCheckedModeBanner: false,
      builder: EasyLoading.init(),
      theme: ThemeData(
        scaffoldBackgroundColor: const Color(0xFFF5F7FB),
        colorScheme: ColorScheme.fromSeed(seedColor: const Color(0xFF4D6FD5)),
        cardTheme: const CardThemeData(
          color: Colors.white,
          margin: EdgeInsets.zero,
          elevation: 0,
        ),
      ),
      home: const MyHomePage(),
    );
  }
}

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

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  static const String _ossAccessKeyId = 'LTAI5tRJh3W4TrfQC3mDK9Vp';
  static const String _ossHost =
      'https://jingheyijia-cop.oss-cn-chengdu.aliyuncs.com';
  static const String _bindHost = 'https://static.cop.jingheyijia.com';
  static const String _policy =
      'eyJleHBpcmF0aW9uIjoiMjAyNi0wNi0zMFQyMTo0OTozNVoiLCJjb25kaXRpb25zIjpbWyJzdGFydHMtd2l0aCIsIiRrZXkiLCJ3eGFwcC1tYXAyL3VwbG9hZC8iXV19';
  static const String _signature = 're2VV8BiN5oS2altXSmiTG/Y0wc=';
  static const String _ossDirectory = 'wxapp-map2/upload/';
  static const String _callback =
      'eyJjYWxsYmFja1VybCI6Imh0dHBzOi8vdGVzdGluZy52aWN0b3JtZW4uY29tL2FwaS9haXN0b3JlL29zcy9jYWxsYmFjayIsImNhbGxiYWNrQm9keSI6ImZpbGVuYW1lPSR7b2JqZWN0fVx1MDAyNnNpemU9JHtzaXplfVx1MDAyNm1pbWVUeXBlPSR7bWltZVR5cGV9XHUwMDI2aGVpZ2h0PSR7aW1hZ2VJbmZvLmhlaWdodH1cdTAwMjZ3aWR0aD0ke2ltYWdlSW5mby53aWR0aH0iLCJjYWxsYmFja0JvZHlUeXBlIjoiYXBwbGljYXRpb24veC13d3ctZm9ybS11cmxlbmNvZGVkIn0=';
  static const String _seedImageUrl =
      '$_bindHost/wxapp-map2/upload/moment/2025625/app-yctgxYDwcPkh.jpg';

  String _singleDateText = '未选择';
  String _rangeDateText = '未选择';
  String _imageStatus = '已预置 1 张示例图，点击缩略图预览，长按大图保存到相册';
  late List<String> _imageUrls;

  @override
  void initState() {
    super.initState();
    _imageUrls = [_seedImageUrl];
  }

  Future<void> _uploadImages() async {
    await UploadImagesTool.uploadImagesTool(
      context: context,
      max: 9,
      isShowLoading: true,
      oSSAccessKeyId: _ossAccessKeyId,
      policy: _policy,
      callback: _callback,
      signature: _signature,
      ossDirectory: _ossDirectory,
      ossHost: _ossHost,
      chooseImagesTap: (list) {
        final uploadedUrls = List<String>.from(list as List)
            .where((item) => item.isNotEmpty)
            .toList();
        if (uploadedUrls.isEmpty) {
          return;
        }
        setState(() {
          _imageUrls = [..._imageUrls, ...uploadedUrls];
          _imageStatus =
              '已上传 ${uploadedUrls.length} 张图片，当前共 ${_imageUrls.length} 张';
        });
      },
    );
  }

  void _openPreview(int index) {
    if (_imageUrls.isEmpty) {
      return;
    }

    LookImagesTool.lookImages(
      listData: _imageUrls,
      currentPage: index,
      isShowEdit: true,
      oSSAccessKeyId: _ossAccessKeyId,
      policy: _policy,
      callback: _callback,
      signature: _signature,
      ossDirectory: _ossDirectory,
      ossHost: _ossHost,
      onEditCallBack: (imageUrl, currentIndex) {
        setState(() {
          _imageUrls[currentIndex] = imageUrl;
          _imageStatus = '第 ${currentIndex + 1} 张图片已重新编辑并上传';
        });
      },
    );
  }

  void _removeImage(int index) {
    setState(() {
      _imageUrls.removeAt(index);
      _imageStatus = _imageUrls.isEmpty
          ? '暂无图片，请先上传后再体验预览和下载'
          : '已删除 1 张图片，当前剩余 ${_imageUrls.length} 张';
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('flutter_common 示例首页'),
        centerTitle: true,
      ),
      body: SafeArea(
        child: ListView(
          padding: const EdgeInsets.all(16),
          children: [
            _buildIntroCard(),
            const SizedBox(height: 16),
            _buildImageDemoCard(),
            const SizedBox(height: 16),
            _buildDemoCard(
              title: '单日选择组件',
              description: '使用 `CalendarChooseWidget` 的单选模式，适合筛选某一天的数据。',
              child: CalendarChooseWidget(
                chooseIndex: 1,
                selectedDate: DateTime.now(),
                dateTimeUtilsType: DateTimeUtilsType.yearMonthDayWord,
                fontSize: 18,
                fontWeight: FontWeight.w600,
                tapAction: (value) {
                  final startTime = value['startTime'] as DateTime?;
                  setState(() {
                    _singleDateText = _formatDateWithWeekday(startTime);
                  });
                },
              ),
              resultText: _singleDateText,
            ),
            const SizedBox(height: 16),
            _buildDemoCard(
              title: '区间选择组件',
              description: '默认展示开始和结束日期，适合做报表、订单或运营时间筛选。',
              child: CalendarChooseWidget(
                selectedDate: DateTime.now(),
                dateTimeUtilsType: DateTimeUtilsType.yearMonthDay,
                fontSize: 18,
                fontWeight: FontWeight.w600,
                tapAction: (value) {
                  final startTime = value['startTime'] as DateTime?;
                  final endTime = value['endTime'] as DateTime?;
                  setState(() {
                    _rangeDateText =
                        '${_formatDate(startTime)} 至 ${_formatDate(endTime)}';
                  });
                },
              ),
              resultText: _rangeDateText,
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildIntroCard() {
    return Card(
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
      child: Padding(
        padding: const EdgeInsets.all(20),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: const [
            Text(
              '项目结构速览',
              style: TextStyle(
                fontSize: 20,
                fontWeight: FontWeight.w700,
                color: Color(0xFF1A1A1A),
              ),
            ),
            SizedBox(height: 12),
            Text(
              'lib/calendarcalendar 提供日期筛选能力，'
              'lib/upload_image 包含 OSS 上传、图片预览、编辑和下载到相册的能力，'
              'lib/utils 则放了日期、弹窗等通用工具。',
              style: TextStyle(
                fontSize: 15,
                height: 1.6,
                color: Color(0xFF4F5B67),
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildImageDemoCard() {
    return Card(
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
      child: Padding(
        padding: const EdgeInsets.all(20),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            const Text(
              'LookImagesTool 图片预览',
              style: TextStyle(
                fontSize: 18,
                fontWeight: FontWeight.w700,
                color: Color(0xFF1A1A1A),
              ),
            ),
            const SizedBox(height: 8),
            const Text(
              '这个示例使用你提供的 OSS 配置上传图片，点击缩略图进入 `LookImagesTool` 预览，支持编辑后重新上传，也支持长按大图保存到手机相册。',
              style: TextStyle(
                fontSize: 14,
                height: 1.6,
                color: Color(0xFF5C6670),
              ),
            ),
            const SizedBox(height: 14),
            Wrap(
              spacing: 8,
              runSpacing: 8,
              children: [
                const _InfoChip(
                  label: 'Host',
                  value: 'jingheyijia-cop.oss-cn-chengdu.aliyuncs.com',
                ),
                _InfoChip(label: 'Bind', value: _bindHost),
                const _InfoChip(label: '目录', value: _ossDirectory),
              ],
            ),
            const SizedBox(height: 16),
            FilledButton.icon(
              onPressed: _uploadImages,
              icon: const Icon(Icons.cloud_upload_outlined),
              label: const Text('上传图片到 OSS'),
            ),
            const SizedBox(height: 16),
            Wrap(
              spacing: 12,
              runSpacing: 12,
              children: [
                for (int index = 0; index < _imageUrls.length; index++)
                  _buildImageTile(
                    imageUrl: _imageUrls[index],
                    index: index,
                  ),
              ],
            ),
            const SizedBox(height: 14),
            Text(
              _imageStatus,
              style: const TextStyle(
                fontSize: 14,
                fontWeight: FontWeight.w500,
                color: Color(0xFF4D6FD5),
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildImageTile({
    required String imageUrl,
    required int index,
  }) {
    return SizedBox(
      width: 104,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          ClipRRect(
            borderRadius: BorderRadius.circular(16),
            child: Material(
              color: Colors.white,
              child: InkWell(
                onTap: () => _openPreview(index),
                child: Stack(
                  children: [
                    SizedBox(
                      width: 104,
                      height: 104,
                      child: Image.network(
                        imageUrl,
                        fit: BoxFit.cover,
                        errorBuilder: (_, __, ___) {
                          return Container(
                            color: const Color(0xFFF1F4FA),
                            alignment: Alignment.center,
                            child: const Icon(
                              Icons.broken_image_outlined,
                              color: Color(0xFF7A8694),
                            ),
                          );
                        },
                      ),
                    ),
                    Positioned(
                      left: 8,
                      top: 8,
                      child: Container(
                        padding: const EdgeInsets.symmetric(
                          horizontal: 8,
                          vertical: 4,
                        ),
                        decoration: BoxDecoration(
                          color: Colors.black.withValues(alpha: 0.5),
                          borderRadius: BorderRadius.circular(12),
                        ),
                        child: Text(
                          '${index + 1}',
                          style: const TextStyle(
                            color: Colors.white,
                            fontSize: 12,
                            fontWeight: FontWeight.w600,
                          ),
                        ),
                      ),
                    ),
                    Positioned(
                      right: 6,
                      top: 6,
                      child: GestureDetector(
                        onTap: () => _removeImage(index),
                        child: Container(
                          width: 24,
                          height: 24,
                          decoration: BoxDecoration(
                            color: Colors.black.withValues(alpha: 0.45),
                            shape: BoxShape.circle,
                          ),
                          child: const Icon(
                            Icons.close,
                            size: 14,
                            color: Colors.white,
                          ),
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),
          const SizedBox(height: 8),
          Text(
            '点击预览',
            style: const TextStyle(
              fontSize: 12,
              color: Color(0xFF5C6670),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildDemoCard({
    required String title,
    required String description,
    required Widget child,
    required String resultText,
  }) {
    return Card(
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
      child: Padding(
        padding: const EdgeInsets.all(20),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(
              title,
              style: const TextStyle(
                fontSize: 18,
                fontWeight: FontWeight.w700,
                color: Color(0xFF1A1A1A),
              ),
            ),
            const SizedBox(height: 8),
            Text(
              description,
              style: const TextStyle(
                fontSize: 14,
                height: 1.6,
                color: Color(0xFF5C6670),
              ),
            ),
            const SizedBox(height: 16),
            Container(
              width: double.infinity,
              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 18),
              decoration: BoxDecoration(
                color: const Color(0xFFF7F9FC),
                borderRadius: BorderRadius.circular(16),
                border: Border.all(color: const Color(0xFFD9E1F2)),
              ),
              child: child,
            ),
            const SizedBox(height: 14),
            Text(
              '当前结果：$resultText',
              style: const TextStyle(
                fontSize: 14,
                fontWeight: FontWeight.w500,
                color: Color(0xFF4D6FD5),
              ),
            ),
          ],
        ),
      ),
    );
  }

  String _formatDate(DateTime? date) {
    if (date == null) {
      return '未选择';
    }
    return DateTimeUtils.dateTimeUtilsTool(
      dateTime: date.toIso8601String(),
      dateTimeUtilsType: DateTimeUtilsType.yearMonthDay,
    );
  }

  String _formatDateWithWeekday(DateTime? date) {
    if (date == null) {
      return '未选择';
    }
    return '${DateTimeUtils.dateTimeUtilsTool(
      dateTime: date.toIso8601String(),
      dateTimeUtilsType: DateTimeUtilsType.yearMonthDayWord,
    )} ${DateTimeUtils.getWeekDay(date)}';
  }
}

class _InfoChip extends StatelessWidget {
  final String label;
  final String value;

  const _InfoChip({
    required this.label,
    required this.value,
  });

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 8),
      decoration: BoxDecoration(
        color: const Color(0xFFF1F4FA),
        borderRadius: BorderRadius.circular(999),
      ),
      child: RichText(
        text: TextSpan(
          style: const TextStyle(
            fontSize: 12,
            color: Color(0xFF5C6670),
          ),
          children: [
            TextSpan(
              text: '$label: ',
              style: const TextStyle(fontWeight: FontWeight.w700),
            ),
            TextSpan(text: value),
          ],
        ),
      ),
    );
  }
}