import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
import 'package:momo/lib/context_menu_region.dart';
import 'package:momo/models/image_list_resp.dart';
import 'package:momo/models/image_resp.dart';
import 'package:momo/provider/rerender.dart';
import 'package:momo/request/http_client.dart';

/// A builder that includes an Offset to draw the context menu at.
// typedef ContextMenuBuilder = Widget Function(
//     BuildContext context, Offset offset);

class Gallery extends ConsumerWidget {
  const Gallery({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    UniqueKey key = ref.watch(uniqueIdProvider);
    return Container(
      color: Colors.white,
      child: ImageGrid(
        key: key,
      ),
    );
  }
}

class ImageGrid extends StatefulWidget {
  const ImageGrid({Key? key}) : super(key: key);

  @override
  State<ImageGrid> createState() => _ImageGridState();
}

class _ImageGridState extends State<ImageGrid> {
  int pageSize = 10;

  final PagingController<int, ImageResp> _pagingController =
      PagingController(firstPageKey: 1);

  Future<void> _fetchPage(int pageKey) async {
    try {
      final resp = await dio.get("/image/history",
          queryParameters: {"page": pageKey, "size": pageSize});
      ImageListResp imageListResp = ImageListResp.fromJson(resp.data);
      final newItems = imageListResp.list;
      final isLastPage = !imageListResp.hasNext;
      if (isLastPage) {
        _pagingController.appendLastPage(newItems);
      } else {
        final nextPageKey = pageKey + 1;
        _pagingController.appendPage(newItems, nextPageKey);
      }
    } catch (error) {
      _pagingController.error = error;
    }
  }

  @override
  void initState() {
    // TODO: implement initState
    _pagingController.addPageRequestListener((pageKey) {
      _fetchPage(pageKey);
    });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return RefreshIndicator(
        child: PagedGridView(
          pagingController: _pagingController,
          builderDelegate: PagedChildBuilderDelegate<ImageResp>(
              itemBuilder: (context, item, index) => ImageItem(image: item)),
          gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
              crossAxisCount: MediaQuery.of(context).size.width > 640 ? 5 : 3),
        ),
        onRefresh: () => Future.sync(() => _pagingController.refresh()));
  }
}

class ImageItem extends ConsumerStatefulWidget {
  const ImageItem({Key? key, required this.image}) : super(key: key);
  final ImageResp image;

  @override
  ConsumerState<ImageItem> createState() => _ImageItemState();
}

class _ImageItemState extends ConsumerState<ImageItem> {
  // final ContextMenuController _contextMenuController = ContextMenuController();

  @override
  void dispose() {
    // TODO: implement dispose
    // if (_contextMenuController.isShown) {
    //   _contextMenuController.remove();
    // }
    super.dispose();
  }

  // void _showContextMenu(Offset position) {
  //   _contextMenuController.show(
  //     context: context,
  //     contextMenuBuilder: (BuildContext context) {
  //       return AdaptiveTextSelectionToolbar.buttonItems(
  //         anchors: TextSelectionToolbarAnchors(
  //           primaryAnchor: position,
  //         ),
  //         buttonItems: <ContextMenuButtonItem>[
  //           ContextMenuButtonItem(
  //             onPressed: () {
  //               ContextMenuController.removeAny();
  //               showDialog(
  //                   context: context,
  //                   builder: (BuildContext context) =>
  //                       AlertDialog(
  //                         title: const Text('删除图片'),
  //                         content: const Text("确认删除图片"),
  //                         actions: [
  //                           TextButton(
  //                             onPressed: () => Navigator.pop(context, 'Cancel'),
  //                             child: const Text('Cancel'),
  //                           ),
  //                           TextButton(
  //                             onPressed: () {
  //                               Navigator.pop(context, 'OK');
  //                               dio
  //                                   .delete("/image/delete/${widget.image.id}")
  //                                   .then((resp) {
  //                                 ref
  //                                     .read(uniqueIdProvider.notifier)
  //                                     .updateId();
  //                                 // context.go("/");
  //                               });
  //                             },
  //                             child: const Text('OK'),
  //                           ),
  //                         ],
  //                       ));
  //               // _showDialog(context);
  //             },
  //             label: '删除',
  //           ),
  //           ContextMenuButtonItem(
  //             onPressed: () {
  //               ContextMenuController.removeAny();
  //               // _showDialog(context);
  //               Clipboard.setData(ClipboardData(
  //                   text:
  //                   "${dio.options.baseUrl}/image/${widget.image.file_path}"));
  //               ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
  //                 content: Row(
  //                   crossAxisAlignment: CrossAxisAlignment.center,
  //                   children: [
  //                     Icon(
  //                       Icons.check_circle,
  //                       color: Colors.white,
  //                     ),
  //                     SizedBox(
  //                       width: 10,
  //                     ),
  //                     Text("已拷贝到剪贴板")
  //                   ],
  //                 ),
  //                 backgroundColor: Colors.lightGreen,
  //               ));
  //             },
  //             label: '复制链接',
  //           ),
  //           ContextMenuButtonItem(
  //             onPressed: () {
  //               ContextMenuController.removeAny();
  //               // _showDialog(context);
  //             },
  //             label: '查看详情',
  //           ),
  //         ],
  //       );
  //     },
  //   );
  // }

  @override
  Widget build(BuildContext context) {
    return ContextMenuRegion(
        contextMenuBuilder: (BuildContext context, Offset offset) {
          return AdaptiveTextSelectionToolbar.buttonItems(
            anchors: TextSelectionToolbarAnchors(
              primaryAnchor: offset,
            ),
            buttonItems: <ContextMenuButtonItem>[
              ContextMenuButtonItem(
                onPressed: () {
                  ContextMenuController.removeAny();
                  Clipboard.setData(ClipboardData(
                      text:
                          "https://raichi.hodokencho.com/api/image/${widget.image.file_path}"));
                  ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
                    content: Row(
                      crossAxisAlignment: CrossAxisAlignment.center,
                      children: [
                        Icon(
                          Icons.check_circle,
                          color: Colors.white,
                        ),
                        SizedBox(
                          width: 10,
                        ),
                        Text("已拷贝到剪贴板")
                      ],
                    ),
                    backgroundColor: Colors.lightGreen,
                  ));
                },
                label: '复制链接',
              ),
            ],
          );
        },
        child: GestureDetector(
          onTap: () {
            context.go(Uri(
                path: "/detail",
                queryParameters: {"id": "${widget.image.id}"}).toString());
          },
          child: Image.network(
            kIsWeb
                ? "/images-api/?url=${dio.options.baseUrl}/image/${widget.image.file_path}&w=512"
                : 'https://raichi.hodokencho.com/images-api/?url=${dio.options.baseUrl}/image/${widget.image.file_path}&w=512',
            fit: BoxFit.cover,
            errorBuilder: (BuildContext context, o, err) {
              return const Icon(Icons.error_outline);
            },
          ),
        ));
  }
}