import 'package:file_picker/file_picker.dart';
import 'package:flisp_app/models/flisp.dart';
import 'package:flisp_app/provider/flisp_provider.dart';
import 'package:flisp_app/utils/minio_utils.dart';
import 'package:flisp_app/widgets/flisp_widget.dart';
import 'package:flutter/material.dart';
import 'package:flutter_form_builder/flutter_form_builder.dart';
import 'package:provider/provider.dart';

class FlispForm extends StatefulWidget {
  final GlobalKey<FormBuilderState> formKey;
  final bool isEditing;
  final Flisp? initialFlisp;
  final VoidCallback onOk;

  const FlispForm({
    super.key,
    required this.formKey,
    required this.isEditing,
    required this.onOk,
    this.initialFlisp,
  });

  @override
  State<FlispForm> createState() => _FlispFormState();
}

class _FlispFormState extends State<FlispForm> {
  bool _showTagOptions = false;

  @override
  void initState() {
    super.initState();
  }

  void _toggleTagOptions() {
    setState(() {
      _showTagOptions = !_showTagOptions;
    });
  }

  void _selectTag(FlispTag tag) {
    final provider = Provider.of<FlispProvider>(context, listen: false);
    setState(() {
      provider.formItem.tag = tag;
      _showTagOptions = false;
    });
  }

  void _selectImage(String fileName) {
    final provider = Provider.of<FlispProvider>(context, listen: false);
    setState(() {
      provider.formItem.imageUrl =
          '${MinIOHelper().rustfsFileUrl}/${MinIOHelper().bucketName}/$fileName';
    });
  }

  void _deleteImage() {
    final provider = Provider.of<FlispProvider>(context, listen: false);
    setState(() {
      provider.formItem.imageUrl = '';
    });
  }

  @override
  Widget build(BuildContext context) {
    final int maxContentCount = 100;
    final provider = Provider.of<FlispProvider>(context);
    final colors = Theme.of(context).colorScheme;

    Widget buildContentField() {
      return FormBuilderTextField(
        name: 'content',
        initialValue: provider.formItem.content,
        onChanged: (value) {
          setState(() {
            provider.formItem.content = value ?? '';
          });
        },
        decoration: InputDecoration(
          hintText: '记录你的灵感瞬间...',
          hintStyle: TextStyle(color: Colors.grey),
          counterText: '',
          suffixText: '${provider.formItem.content.length}/$maxContentCount',
          border: OutlineInputBorder(
            borderRadius: BorderRadius.circular(12),
            borderSide: BorderSide(color: Colors.grey.shade200),
          ),
          enabledBorder: OutlineInputBorder(
            borderRadius: BorderRadius.circular(12),
            borderSide: BorderSide(color: Colors.grey.shade200),
          ),
          focusedBorder: OutlineInputBorder(
            borderRadius: BorderRadius.circular(12),
            borderSide: BorderSide(color: colors.primary),
          ),
          filled: true,
          fillColor: colors.surface,
          contentPadding: EdgeInsets.symmetric(horizontal: 16, vertical: 14),
        ),
        minLines: 4,
        maxLines: 8,
        maxLength: maxContentCount,
        validator: (value) {
          if (value != null && value.isEmpty) {
            return '请输入内容';
          }

          if (value != null && value.length > maxContentCount) {
            return '内容不能超过$maxContentCount个字符';
          }
          return null;
        },
      );
    }

    Widget buildFormBody() {
      return Expanded(
        child: SingleChildScrollView(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              buildContentField(),
              SizedBox(height: 8),
              buildFlispTag(provider.formItem),
              SizedBox(height: 12),
              if (provider.formItem.imageUrl.isNotEmpty)
                buildFlispImage(
                  flisp: provider.formItem,
                  showDelete: true,
                  onDelete: _deleteImage,
                ),
            ],
          ),
        ),
      );
    }

    void selectImage() async {
      FilePickerResult? result = await FilePicker.platform.pickFiles(
        type: FileType.custom,
        allowedExtensions: ['jpg', 'jpeg', 'png'],
        allowMultiple: false,
      );

      if (result != null) {
        PlatformFile file = result.files.first;
        final fileName = await MinIOHelper().uploadFile(file: file);
        _selectImage(fileName);
      }
    }

    Widget buildSelectImageButton() {
      return GestureDetector(
        onTap: () => selectImage(),
        child: Container(
          width: 36,
          height: 36,
          decoration: BoxDecoration(
            color: Colors.blue.withAlpha(50),
            borderRadius: BorderRadius.circular(8),
            border: Border.all(color: Colors.blue.withAlpha(80), width: 1),
          ),
          child: Icon(
            Icons.photo_library_rounded,
            size: 20,
            color: Colors.blue,
          ),
        ),
      );
    }

    Widget buildSelectTagButton() {
      return GestureDetector(
        onTap: _toggleTagOptions,
        child: Container(
          width: 36,
          height: 36,
          decoration: BoxDecoration(
            color: Colors.orange.withAlpha(50),
            borderRadius: BorderRadius.circular(8),
            border: Border.all(color: Colors.orange.withAlpha(80), width: 1),
          ),
          child: Icon(
            Icons.local_offer_rounded,
            size: 20,
            color: Colors.orange,
          ),
        ),
      );
    }

    Widget buildConfirmButton() {
      return Container(
        width: 48,
        height: 48,
        decoration: BoxDecoration(
          color: colors.primary,
          borderRadius: BorderRadius.circular(24),
        ),
        child: IconButton(
          icon: Icon(Icons.arrow_forward_rounded, size: 24),
          color: Colors.white,
          onPressed: () => widget.onOk(),
        ),
      );
    }

    Widget buildShowTagOptions() {
      // 计算弹窗位置（基于标签按钮位置）
      return Positioned(
        bottom: 50, // 调整垂直位置
        left: 60, // 调整水平位置
        child: Container(
          width: 90,
          padding: EdgeInsets.all(8),
          decoration: BoxDecoration(
            color: Colors.white,
            borderRadius: BorderRadius.circular(8),
            boxShadow: [
              BoxShadow(
                color: Colors.black26,
                blurRadius: 8,
                offset: Offset(0, 2),
              ),
            ],
          ),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children:
                FlispTag.values.map((tag) {
                  return GestureDetector(
                    onTap: () => _selectTag(tag),
                    child: Container(
                      width: double.infinity,
                      padding: EdgeInsets.symmetric(vertical: 8, horizontal: 8),
                      child: Row(
                        children: [
                          Container(
                            width: 20,
                            height: 20,
                            decoration: BoxDecoration(
                              color: tag.color,
                              shape: BoxShape.circle,
                            ),
                            child: Icon(
                              tag.icon,
                              size: 12,
                              color: Colors.white,
                            ),
                          ),
                          SizedBox(width: 8),
                          Text(tag.label, style: TextStyle(fontSize: 12)),
                        ],
                      ),
                    ),
                  );
                }).toList(),
          ),
        ),
      );
    }

    Widget buildBottomButton() {
      return Container(
        padding: EdgeInsets.only(top: 16),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Row(
              children: [
                buildSelectImageButton(),
                SizedBox(width: 12),
                buildSelectTagButton(),
              ],
            ),
            buildConfirmButton(),
          ],
        ),
      );
    }

    // 整体使用Stack布局分离事件层级
    return Stack(
      children: [
        // 外层点击区域（用于关闭弹窗）
        GestureDetector(
          onTap: () {
            if (_showTagOptions) {
              setState(() => _showTagOptions = false);
            }
          },
          // 弹窗显示时才拦截事件，隐藏时不影响其他点击
          behavior:
              _showTagOptions
                  ? HitTestBehavior.opaque
                  : HitTestBehavior.translucent,
        ),

        // 主表单内容
        FormBuilder(
          key: widget.formKey,
          child: Column(children: [buildFormBody(), buildBottomButton()]),
        ),

        // 标签弹窗（放在最上层，确保事件优先响应）
        if (_showTagOptions) buildShowTagOptions(),
      ],
    );
  }
}