import 'dart:io';

import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:image_picker/image_picker.dart';
import 'package:news_app/constant/color_res.dart';
import 'package:news_app/constant/size_res.dart';
import 'package:news_app/http/http_util.dart';
import 'package:news_app/widget/my_txt.dart';

import '../../widget/auth_gesture_detector.dart';

/// @author: bo.zeng
/// @email: cnhbwds@gmail.com
/// @date: 2025 2025/4/17 12:22
/// @description:

/// 图片上传状态
enum UploadStatus {
  uploading, // 上传中
  success, // 上传成功
  failed, // 上传失败
}

/// 图片数据模型
class ImageItem {
  final String localPath; // 本地路径
  String? remoteUrl; // 远程URL
  UploadStatus status; // 上传状态

  ImageItem({
    required this.localPath,
    this.remoteUrl,
    this.status = UploadStatus.uploading,
  });

  ImageItem copyWith({
    String? localPath,
    String? remoteUrl,
    UploadStatus? status,
  }) {
    return ImageItem(
      localPath: localPath ?? this.localPath,
      remoteUrl: remoteUrl ?? this.remoteUrl,
      status: status ?? this.status,
    );
  }
}

class CommentInputBarWidget extends ConsumerStatefulWidget {
  final FocusNode focusNode;

  final String id;

  final Function(String, List<String>)? onSend; // 改为传递URL列表

  const CommentInputBarWidget(
    this.focusNode,
    this.onSend,
    this.id, {
    super.key,
  });

  @override
  ConsumerState<ConsumerStatefulWidget> createState() =>
      _CommentInputBarState();
}

class _CommentInputBarState extends ConsumerState<CommentInputBarWidget> {
  final TextEditingController _controller = TextEditingController();
  final List<ImageItem> _imageItems = [];
  static const int maxImageCount = 9;

  Future<void> _pickImage() async {
    final List<XFile> pickedFiles = await ImagePicker().pickMultiImage(
      imageQuality: 80,
    );

    if (pickedFiles.isNotEmpty) {
      // 计算还能添加多少张图片
      final remainingSlots = maxImageCount - _imageItems.length;
      if (remainingSlots <= 0) {
        // 已达到最大数量，不添加
        return;
      }
      // 添加新图片，最多添加到9张
      final imagesToAdd = pickedFiles.take(remainingSlots).toList();

      setState(() {
        for (var file in imagesToAdd) {
          _imageItems.add(ImageItem(localPath: file.path));
        }
      });

      // 立即上传图片
      _uploadImages(imagesToAdd.map((e) => e.path).toList());
    }
  }

  /// 上传图片
  Future<void> _uploadImages(List<String> filePaths) async {
    // 批量上传接口
    final urls = await HttpUtil().uploadCommentImages(filePaths);

    setState(() {
      // 更新上传状态
      int urlIndex = 0;
      for (int i = 0; i < _imageItems.length; i++) {
        if (_imageItems[i].status == UploadStatus.uploading &&
            filePaths.contains(_imageItems[i].localPath)) {
          if (urlIndex < urls.length) {
            _imageItems[i] = _imageItems[i].copyWith(
              remoteUrl: urls[urlIndex],
              status: UploadStatus.success,
            );
            urlIndex++;
          } else {
            _imageItems[i] = _imageItems[i].copyWith(
              status: UploadStatus.failed,
            );
          }
        }
      }
    });
  }

  /// 重试上传失败的图片
  Future<void> _retryUpload(int index) async {
    final item = _imageItems[index];
    setState(() {
      _imageItems[index] = item.copyWith(status: UploadStatus.uploading);
    });

    final url = await HttpUtil().uploadCommentImage(item.localPath);

    setState(() {
      if (url != null) {
        _imageItems[index] = item.copyWith(
          remoteUrl: url,
          status: UploadStatus.success,
        );
      } else {
        _imageItems[index] = item.copyWith(status: UploadStatus.failed);
      }
    });
  }

  void _removeImage(int index) {
    setState(() {
      _imageItems.removeAt(index);
    });
  }

  void _clearImages() {
    setState(() {
      _imageItems.clear();
    });
  }

  @override
  Widget build(BuildContext context) {
    double size = MediaQuery.of(context).padding.bottom;
    return Container(
      decoration: BoxDecoration(
        color: Colors.white,
        border: Border(top: BorderSide(color: colorE5E5E5, width: 0.5)),
      ),
      padding: EdgeInsets.only(
        top: horizontalPadding,
        bottom: size > 0 ? size : horizontalPadding,
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.end,
        mainAxisSize: MainAxisSize.min,
        children: [
          // 图片预览区域 - 支持多张图片
          if (_imageItems.isNotEmpty)
            Container(
              height: 60.h,
              margin: EdgeInsets.only(bottom: 10.w),
              child: SingleChildScrollView(
                scrollDirection: Axis.horizontal,
                child: Row(
                  children: List.generate(_imageItems.length, (index) {
                    final item = _imageItems[index];
                    return Container(
                      width: 60.w,
                      height: 60.h,
                      margin: EdgeInsets.only(right: 8.w),
                      child: Stack(
                        alignment: Alignment.topRight,
                        children: [
                          // 显示图片（本地或远程）
                          ClipRRect(
                            borderRadius: BorderRadius.circular(4.r),
                            child: item.status == UploadStatus.success && item.remoteUrl != null
                                ? CachedNetworkImage(
                                    imageUrl: item.remoteUrl!,
                                    width: 60.w,
                                    height: 60.h,
                                    fit: BoxFit.cover,
                                    placeholder: (context, url) => Image.file(
                                      File(item.localPath),
                                      width: 60.w,
                                      height: 60.h,
                                      fit: BoxFit.cover,
                                    ),
                                    errorWidget: (context, url, error) => Image.file(
                                      File(item.localPath),
                                      width: 60.w,
                                      height: 60.h,
                                      fit: BoxFit.cover,
                                    ),
                                  )
                                : Image.file(
                                    File(item.localPath),
                                    width: 60.w,
                                    height: 60.h,
                                    fit: BoxFit.cover,
                                  ),
                          ),
                          // 上传中遮罩
                          if (item.status == UploadStatus.uploading)
                            Container(
                              width: 60.w,
                              height: 60.h,
                              decoration: BoxDecoration(
                                color: Colors.black26,
                                borderRadius: BorderRadius.circular(4.r),
                              ),
                              child: Center(
                                child: SizedBox(
                                  width: 20.w,
                                  height: 20.w,
                                  child: CircularProgressIndicator(
                                    strokeWidth: 2,
                                    valueColor:
                                        AlwaysStoppedAnimation<Color>(Colors.white),
                                  ),
                                ),
                              ),
                            ),
                          // 上传失败标记
                          if (item.status == UploadStatus.failed)
                            Container(
                              width: 60.w,
                              height: 60.h,
                              decoration: BoxDecoration(
                                color: Colors.black26,
                                borderRadius: BorderRadius.circular(4.r),
                              ),
                              child: Center(
                                child: GestureDetector(
                                  onTap: () => _retryUpload(index),
                                  child: Icon(
                                    Icons.refresh,
                                    color: Colors.white,
                                    size: 20.w,
                                  ),
                                ),
                              ),
                            ),
                          // 删除按钮
                          GestureDetector(
                            onTap: () => _removeImage(index),
                            child: Container(
                              margin: EdgeInsets.all(2.w),
                              width: 16.w,
                              height: 16.w,
                              decoration: BoxDecoration(
                                color: Colors.black54,
                                shape: BoxShape.circle,
                              ),
                              child: Icon(
                                Icons.close,
                                color: Colors.white,
                                size: 10.w,
                              ),
                            ),
                          ),
                        ],
                      ),
                    );
                  }),
                ),
              ),
            ),
          Row(
            children: [
              Expanded(
                child: Container(
                  height: 40.h,
                  margin: EdgeInsets.only(right: 10.w),
                  child: TextField(
                    decoration: InputDecoration(
                      fillColor: colorF5F7FA,
                      filled: true,
                      border: OutlineInputBorder(
                        borderRadius: BorderRadius.circular(5.r),
                        borderSide: BorderSide.none,
                      ),
                      contentPadding: EdgeInsets.symmetric(
                        horizontal: 10.w,
                        vertical: 20.h,
                      ),
                      hintText: '快来写下你的评论吧～',
                      hintStyle: TextStyle(color: color7788A0, fontSize: 12.sp),
                    ),
                    focusNode: widget.focusNode,
                    controller: _controller,
                  ),
                ),
              ),
              // 图片上传按钮
              GestureDetector(
                onTap: _pickImage,
                child: Container(
                  width: 40.w,
                  height: 40.h,
                  margin: EdgeInsets.only(right: 8.w),
                  alignment: Alignment.center,
                  child: Icon(
                    Icons.image,
                    color: _imageItems.isNotEmpty ? color188FFF : color7788A0,
                    size: 24.w,
                  ),
                ),
              ),
              AuthGestureDetector(
                onTap: () {
                  // 获取所有上传成功的图片URL
                  final successUrls = _imageItems
                      .where((item) =>
                          item.status == UploadStatus.success && item.remoteUrl != null)
                      .map((item) => item.remoteUrl!)
                      .toList();
                  widget.onSend?.call(_controller.text, successUrls);
                  _controller.clear();
                  _clearImages();
                },
                child: Container(
                  width: 50.w,
                  padding: EdgeInsets.symmetric(vertical: 5.h),
                  alignment: Alignment.center,
                  decoration: BoxDecoration(
                    color: color188FFF,
                    borderRadius: BorderRadius.circular(5.r),
                  ),
                  child: myTxt(text: "发送", color: Colors.white, fontSize: 12.sp),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }
}