import 'dart:io';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:logging/logging.dart';
import 'package:media_extension/media_extension.dart';
import 'package:path/path.dart' as file_path;
import 'package:photo_manager/photo_manager.dart';
import 'package:photos/core/event_bus.dart';
import 'package:photos/db/files_db.dart';
import 'package:photos/events/local_photos_updated_event.dart';
import "package:photos/generated/l10n.dart";
import 'package:photos/models/file/file.dart';
import 'package:photos/models/file/file_type.dart';
import 'package:photos/models/ignored_file.dart';
import "package:photos/models/metadata/common_keys.dart";
import 'package:photos/models/selected_files.dart';
import 'package:photos/models/file/trash_file.dart';
import 'package:photos/services/collections_service.dart';
import 'package:photos/services/hidden_service.dart';
import 'package:photos/services/ignored_files_service.dart';
import 'package:photos/services/local_sync_service.dart';
import 'package:photos/ui/collections/collection_action_sheet.dart';
import 'package:photos/ui/viewer/file/custom_app_bar.dart';
import "package:photos/ui/viewer/file_details/favorite_widget.dart";
import "package:photos/ui/viewer/file_details/upload_icon_widget.dart";
import 'package:photos/utils/dialog_util.dart';
import 'package:photos/utils/file_util.dart';
import "package:photos/utils/magic_util.dart";
import 'package:photos/utils/toast_util.dart';

class FileAppBar extends StatefulWidget {
  final EnteFile file;
  final Function(EnteFile) onFileRemoved;
  final double height;
  final bool shouldShowActions;
  final int? userID;
  final ValueNotifier<bool> enableFullScreenNotifier;

  const FileAppBar(
    this.file,
    this.onFileRemoved,
    this.userID,
    this.height,
    this.shouldShowActions, {
    required this.enableFullScreenNotifier,
    Key? key,
  }) : super(key: key);

  @override
  FileAppBarState createState() => FileAppBarState();
}

class FileAppBarState extends State<FileAppBar> {
  final _logger = Logger("FadingAppBar");

  @override
  Widget build(BuildContext context) {
    return CustomAppBar(
      ValueListenableBuilder(
        valueListenable: widget.enableFullScreenNotifier,
        builder: (context, bool isFullScreen, _) {
          return IgnorePointer(
            ignoring: isFullScreen,
            child: AnimatedOpacity(
              opacity: isFullScreen ? 0 : 1,
              duration: const Duration(milliseconds: 150),
              child: Container(
                decoration: BoxDecoration(
                  gradient: LinearGradient(
                    begin: Alignment.topCenter,
                    end: Alignment.bottomCenter,
                    colors: [
                      Colors.black.withOpacity(0.72),
                      Colors.black.withOpacity(0.6),
                      Colors.transparent,
                    ],
                    stops: const [0, 0.2, 1],
                  ),
                ),
                child: _buildAppBar(),
              ),
            ),
          );
        },
      ),
      Size.fromHeight(Platform.isAndroid ? 80 : 96),
    );
  }

  AppBar _buildAppBar() {
    debugPrint("building app bar");

    final List<Widget> actions = [];
    final isTrashedFile = widget.file is TrashFile;
    final shouldShowActions = widget.shouldShowActions && !isTrashedFile;
    final bool isOwnedByUser =
        widget.file.ownerID == null || widget.file.ownerID == widget.userID;
    final bool isFileUploaded = widget.file.isUploaded;
    bool isFileHidden = false;
    if (isOwnedByUser && isFileUploaded) {
      isFileHidden = CollectionsService.instance
              .getCollectionByID(widget.file.collectionID!)
              ?.isHidden() ??
          false;
    }
    // only show fav option for files owned by the user
    if (isOwnedByUser && !isFileHidden && isFileUploaded) {
      actions.add(FavoriteWidget(widget.file));
    }
    if (!isFileUploaded) {
      actions.add(
        UploadIconWidget(
          file: widget.file,
          key: ValueKey(widget.file.tag),
        ),
      );
    }
    actions.add(
      PopupMenuButton(
        itemBuilder: (context) {
          final List<PopupMenuItem> items = [];
          if (widget.file.isRemoteFile) {
            items.add(
              PopupMenuItem(
                value: 1,
                child: Row(
                  children: [
                    Icon(
                      Platform.isAndroid
                          ? Icons.download
                          : CupertinoIcons.cloud_download,
                      color: Theme.of(context).iconTheme.color,
                    ),
                    const Padding(
                      padding: EdgeInsets.all(8),
                    ),
                    Text(S.of(context).download),
                  ],
                ),
              ),
            );
          }
          // options for files owned by the user
          if (isOwnedByUser && !isFileHidden) {
            final bool isArchived =
                widget.file.magicMetadata.visibility == archiveVisibility;
            items.add(
              PopupMenuItem(
                value: 2,
                child: Row(
                  children: [
                    Icon(
                      isArchived ? Icons.unarchive : Icons.archive_outlined,
                      color: Theme.of(context).iconTheme.color,
                    ),
                    const Padding(
                      padding: EdgeInsets.all(8),
                    ),
                    Text(
                      isArchived
                          ? S.of(context).unarchive
                          : S.of(context).archive,
                    ),
                  ],
                ),
              ),
            );
          }
          if ((widget.file.fileType == FileType.image ||
                  widget.file.fileType == FileType.livePhoto) &&
              Platform.isAndroid) {
            items.add(
              PopupMenuItem(
                value: 3,
                child: Row(
                  children: [
                    Icon(
                      Icons.wallpaper_outlined,
                      color: Theme.of(context).iconTheme.color,
                    ),
                    const Padding(
                      padding: EdgeInsets.all(8),
                    ),
                    Text(S.of(context).setAs),
                  ],
                ),
              ),
            );
          }
          if (isOwnedByUser && widget.file.isUploaded) {
            if (!isFileHidden) {
              items.add(
                PopupMenuItem(
                  value: 4,
                  child: Row(
                    children: [
                      Icon(
                        Icons.visibility_off,
                        color: Theme.of(context).iconTheme.color,
                      ),
                      const Padding(
                        padding: EdgeInsets.all(8),
                      ),
                      Text(S.of(context).hide),
                    ],
                  ),
                ),
              );
            } else {
              items.add(
                PopupMenuItem(
                  value: 5,
                  child: Row(
                    children: [
                      Icon(
                        Icons.visibility,
                        color: Theme.of(context).iconTheme.color,
                      ),
                      const Padding(
                        padding: EdgeInsets.all(8),
                      ),
                      Text(S.of(context).unhide),
                    ],
                  ),
                ),
              );
            }
          }
          return items;
        },
        onSelected: (dynamic value) async {
          if (value == 1) {
            _download(widget.file);
          } else if (value == 2) {
            await _toggleFileArchiveStatus(widget.file);
          } else if (value == 3) {
            _setAs(widget.file);
          } else if (value == 4) {
            _handleHideRequest(context);
          } else if (value == 5) {
            _handleUnHideRequest(context);
          }
        },
      ),
    );
    return AppBar(
      iconTheme:
          const IconThemeData(color: Colors.white), //same for both themes
      actions: shouldShowActions ? actions : [],
      elevation: 0,
      backgroundColor: const Color(0x00000000),
    );
  }

  Future<void> _handleHideRequest(BuildContext context) async {
    try {
      final hideResult =
          await CollectionsService.instance.hideFiles(context, [widget.file]);
      if (hideResult) {
        widget.onFileRemoved(widget.file);
      }
    } catch (e, s) {
      _logger.severe("failed to update file visibility", e, s);
      await showGenericErrorDialog(context: context);
    }
  }

  Future<void> _handleUnHideRequest(BuildContext context) async {
    final selectedFiles = SelectedFiles();
    selectedFiles.files.add(widget.file);
    showCollectionActionSheet(
      context,
      selectedFiles: selectedFiles,
      actionType: CollectionActionType.unHide,
    );
  }

  Future<void> _toggleFileArchiveStatus(EnteFile file) async {
    final bool isArchived =
        widget.file.magicMetadata.visibility == archiveVisibility;
    await changeVisibility(
      context,
      [widget.file],
      isArchived ? visibleVisibility : archiveVisibility,
    );
    if (mounted) {
      setState(() {});
    }
  }

  Future<void> _download(EnteFile file) async {
    final dialog = createProgressDialog(context, "Downloading...");
    await dialog.show();
    try {
      final FileType type = file.fileType;
      final bool downloadLivePhotoOnDroid =
          type == FileType.livePhoto && Platform.isAndroid;
      AssetEntity? savedAsset;
      final File? fileToSave = await getFile(file);
      //Disabling notifications for assets changing to insert the file into
      //files db before triggering a sync.
      PhotoManager.stopChangeNotify();
      if (type == FileType.image) {
        savedAsset = await PhotoManager.editor
            .saveImageWithPath(fileToSave!.path, title: file.title!);
      } else if (type == FileType.video) {
        savedAsset = await PhotoManager.editor
            .saveVideo(fileToSave!, title: file.title!);
      } else if (type == FileType.livePhoto) {
        final File? liveVideoFile =
            await getFileFromServer(file, liveVideo: true);
        if (liveVideoFile == null) {
          throw AssertionError("Live video can not be null");
        }
        if (downloadLivePhotoOnDroid) {
          await _saveLivePhotoOnDroid(fileToSave!, liveVideoFile, file);
        } else {
          savedAsset = await PhotoManager.editor.darwin.saveLivePhoto(
            imageFile: fileToSave!,
            videoFile: liveVideoFile,
            title: file.title!,
          );
        }
      }

      if (savedAsset != null) {
        file.localID = savedAsset.id;
        await FilesDB.instance.insert(file);
        Bus.instance.fire(
          LocalPhotosUpdatedEvent(
            [file],
            source: "download",
          ),
        );
      } else if (!downloadLivePhotoOnDroid && savedAsset == null) {
        _logger.severe('Failed to save assert of type $type');
      }
      showToast(context, S.of(context).fileSavedToGallery);
      await dialog.hide();
    } catch (e) {
      _logger.warning("Failed to save file", e);
      await dialog.hide();
      showGenericErrorDialog(context: context);
    } finally {
      PhotoManager.startChangeNotify();
      LocalSyncService.instance.checkAndSync().ignore();
    }
  }

  Future<void> _saveLivePhotoOnDroid(
    File image,
    File video,
    EnteFile enteFile,
  ) async {
    debugPrint("Downloading LivePhoto on Droid");
    AssetEntity? savedAsset = await (PhotoManager.editor
        .saveImageWithPath(image.path, title: enteFile.title!));
    if (savedAsset == null) {
      throw Exception("Failed to save image of live photo");
    }
    IgnoredFile ignoreVideoFile = IgnoredFile(
      savedAsset.id,
      savedAsset.title ?? '',
      savedAsset.relativePath ?? 'remoteDownload',
      "remoteDownload",
    );
    await IgnoredFilesService.instance.cacheAndInsert([ignoreVideoFile]);
    final videoTitle = file_path.basenameWithoutExtension(enteFile.title!) +
        file_path.extension(video.path);
    savedAsset = (await (PhotoManager.editor.saveVideo(
      video,
      title: videoTitle,
    )));
    if (savedAsset == null) {
      throw Exception("Failed to save video of live photo");
    }

    ignoreVideoFile = IgnoredFile(
      savedAsset.id,
      savedAsset.title ?? videoTitle,
      savedAsset.relativePath ?? 'remoteDownload',
      "remoteDownload",
    );
    await IgnoredFilesService.instance.cacheAndInsert([ignoreVideoFile]);
  }

  Future<void> _setAs(EnteFile file) async {
    final dialog = createProgressDialog(context, S.of(context).pleaseWait);
    await dialog.show();
    try {
      final File? fileToSave = await (getFile(file));
      if (fileToSave == null) {
        throw Exception("Fail to get file for setAs operation");
      }
      final m = MediaExtension();
      final bool result = await m.setAs("file://${fileToSave.path}", "image/*");
      if (result == false) {
        showShortToast(context, S.of(context).somethingWentWrong);
      }
      dialog.hide();
    } catch (e) {
      dialog.hide();
      _logger.severe("Failed to use as", e);
      showGenericErrorDialog(context: context);
    }
  }
}