immich/mobile/lib/presentation/widgets/asset_viewer/top_app_bar.widget.dart

import 'package:auto_route/auto_route.dart';
import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:immich_mobile/constants/enums.dart';
import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
import 'package:immich_mobile/domain/utils/event_stream.dart';
import 'package:immich_mobile/extensions/build_context_extensions.dart';
import 'package:immich_mobile/presentation/widgets/action_buttons/favorite_action_button.widget.dart';
import 'package:immich_mobile/presentation/widgets/action_buttons/unfavorite_action_button.widget.dart';
import 'package:immich_mobile/presentation/widgets/asset_viewer/asset_viewer.state.dart';
import 'package:immich_mobile/providers/infrastructure/asset_viewer/current_asset.provider.dart';
import 'package:immich_mobile/providers/user.provider.dart';

class ViewerTopAppBar extends ConsumerWidget implements PreferredSizeWidget {
  const ViewerTopAppBar({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final asset = ref.watch(currentAssetNotifier);
    if (asset == null) {
      return const SizedBox.shrink();
    }

    final user = ref.watch(currentUserProvider);
    final isOwner = asset is RemoteAsset && asset.ownerId == user?.id;

    final isShowingSheet = ref
        .watch(assetViewerProvider.select((state) => state.showingBottomSheet));
    int opacity = ref.watch(
      assetViewerProvider.select((state) => state.backgroundOpacity),
    );
    final showControls =
        ref.watch(assetViewerProvider.select((s) => s.showingControls));

    if (!showControls) {
      opacity = 0;
    }

    final actions = <Widget>[
      if (asset.hasRemote && isOwner && !asset.isFavorite)
        const FavoriteActionButton(source: ActionSource.viewer, menuItem: true),
      if (asset.hasRemote && isOwner && asset.isFavorite)
        const UnFavoriteActionButton(
          source: ActionSource.viewer,
          menuItem: true,
        ),
      const _KebabMenu(),
    ];

    return IgnorePointer(
      ignoring: opacity < 255,
      child: AnimatedOpacity(
        opacity: opacity / 255,
        duration: Durations.short2,
        child: AppBar(
          backgroundColor:
              isShowingSheet ? Colors.transparent : Colors.black.withAlpha(125),
          leading: const _AppBarBackButton(),
          iconTheme: const IconThemeData(size: 22, color: Colors.white),
          actionsIconTheme: const IconThemeData(size: 22, color: Colors.white),
          shape: const Border(),
          actions: isShowingSheet ? null : actions,
        ),
      ),
    );
  }

  @override
  Size get preferredSize => const Size.fromHeight(60.0);
}

class _KebabMenu extends ConsumerWidget {
  const _KebabMenu();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    return IconButton(
      onPressed: () {
        EventStream.shared.emit(const ViewerOpenBottomSheetEvent());
      },
      icon: const Icon(Icons.more_vert_rounded),
    );
  }
}

class _AppBarBackButton extends ConsumerWidget {
  const _AppBarBackButton();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final isShowingSheet = ref
        .watch(assetViewerProvider.select((state) => state.showingBottomSheet));
    final backgroundColor =
        isShowingSheet && !context.isDarkTheme ? Colors.white : Colors.black;
    final foregroundColor =
        isShowingSheet && !context.isDarkTheme ? Colors.black : Colors.white;

    return Padding(
      padding: const EdgeInsets.only(left: 12.0),
      child: ElevatedButton(
        style: ElevatedButton.styleFrom(
          backgroundColor: backgroundColor,
          shape: const CircleBorder(),
          iconSize: 22,
          iconColor: foregroundColor,
          padding: EdgeInsets.zero,
          elevation: isShowingSheet ? 4 : 0,
        ),
        onPressed: context.maybePop,
        child: const Icon(Icons.arrow_back_rounded),
      ),
    );
  }
}