import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:logging/logging.dart';
import 'package:result_monad/result_monad.dart';

import '../../globals.dart';
import '../../models/auth/profile.dart';
import '../../models/exec_error.dart';
import '../../models/timeline_entry.dart';
import '../../riverpod_controllers/account_services.dart';
import '../../riverpod_controllers/feature_checker_services.dart';
import '../../riverpod_controllers/fediverse_server_validator_services.dart';
import '../../riverpod_controllers/timeline_entry_services.dart';
import '../../utils/dateutils.dart';
import '../../utils/interaction_availability_util.dart';
import '../../utils/snackbar_builder.dart';

class InteractionsBarControl extends ConsumerStatefulWidget {
  final TimelineEntry entry;
  final bool showOpenControl;
  final bool isMine;

  const InteractionsBarControl({
    super.key,
    required this.entry,
    required this.isMine,
    required this.showOpenControl,
  });

  @override
  ConsumerState<InteractionsBarControl> createState() =>
      _InteractionsBarControlState();
}

class _InteractionsBarControlState
    extends ConsumerState<InteractionsBarControl> {
  static final _logger = Logger('$InteractionsBarControl');

  var isProcessing = false;

  bool get isPost => widget.entry.parentId.isEmpty;

  bool get isFavorited => widget.entry.isFavorited;

  bool get youReshared => widget.entry.youReshared;

  int get reshares => widget.entry.engagementSummary.rebloggedCount;

  int get comments => widget.entry.engagementSummary.repliesCount;

  int get likes => widget.entry.engagementSummary.favoritesCount;

  Future<void> toggleFavorited(Profile profile) async {
    setState(() {
      isProcessing = true;
    });
    final newState = !isFavorited;
    _logger.fine('Trying to toggle favorite from $isFavorited to $newState');
    final result = await ref
        .read(timelineEntryManagerProvider(profile, widget.entry.id).notifier)
        .toggleFavorited(newState);
    result.match(onSuccess: (update) {
      setState(() {
        _logger.fine('Success toggling! $isFavorited -> ${update.isFavorited}');
      });
    }, onError: (error) {
      buildSnackbar(context, 'Error toggling like status: $error');
    });
    setState(() {
      isProcessing = false;
    });
  }

  Future<void> resharePost(Profile profile) async {
    setState(() {
      isProcessing = true;
    });

    // TODO Add can reshare check
    if (!ref.read(
        featureCheckProvider(profile, RelaticaFeatures.diasporaReshare))) {
      final serverTypeEstimate = await ref
          .read(serverDataProvider(widget.entry.externalLink).future)
          .fold(onSuccess: (d) => d.softwareName, onError: (_) => '');
      if (serverTypeEstimate == softwareTypeDiaspora) {
        if (mounted) {
          final error = ref.read(
              versionErrorStringProvider(RelaticaFeatures.diasporaReshare));
          await showConfirmDialog(context, error);
        }
        setState(() {
          isProcessing = false;
        });
      }
    }

    final id = widget.entry.id;
    _logger.fine('Trying to reshare $id');
    final result = await ref
        .read(timelineEntryManagerProvider(profile, widget.entry.id).notifier)
        .resharePost();

    result.match(onSuccess: (update) {
      setState(() {
        _logger.fine('Success resharing post by ${widget.entry.author}');
      });
    }, onError: (error) {
      buildSnackbar(context, 'Error resharing post by ${widget.entry.author}');
      logError(error, _logger);
    });
    setState(() {
      isProcessing = false;
    });
  }

  Future<void> addComment() async {
    if (mounted) {
      final elapsed = ElapsedDateUtils.elapsedTimeFromEpochSeconds(
          widget.entry.creationTimestamp);

      if (elapsed > const Duration(days: 30)) {
        final label = ElapsedDateUtils.elapsedTimeStringFromEpochSeconds(
            widget.entry.creationTimestamp);
        final confirm = await showYesNoDialog(
          context,
          'Entry is from $label. Are you sure you want to add a comment on it?',
        );
        if (confirm != true) {
          return;
        }
      }
    }

    if (mounted) {
      context.push('/comment/new?parent_id=${widget.entry.id}');
    }
  }

  Future<void> unResharePost(Profile profile) async {
    setState(() {
      isProcessing = true;
    });
    final id = widget.entry.id;
    _logger.fine('Trying to un-reshare $id');
    final result = await ref
        .read(timelineEntryManagerProvider(profile, widget.entry.id).notifier)
        .unResharePost();
    result.match(onSuccess: (update) {
      setState(() {
        _logger.fine('Success un-resharing post by ${widget.entry.author}');
      });
    }, onError: (error) {
      buildSnackbar(
          context, 'Error un-resharing post by ${widget.entry.author}');
      logError(error, _logger);
    });
    setState(() {
      isProcessing = false;
    });
  }

  Widget buildButton(
    IconData icon,
    int count,
    bool isEnabled,
    String tooltip,
    Future Function()? onPressed,
  ) {
    return Row(
      children: [
        IconButton(
          onPressed: isEnabled && !isProcessing ? onPressed : null,
          icon: Icon(icon),
          tooltip: tooltip,
        ),
        Text('$count'),
      ],
    );
  }

  Widget buildLikeButton(Profile profile) {
    final canReact = widget.entry.getCanReact(ref);
    final tooltip =
        canReact.canDo ? 'Press to toggle like/unlike' : canReact.reason;
    return buildButton(
      isFavorited ? Icons.thumb_up : Icons.thumb_up_outlined,
      likes,
      true,
      tooltip,
      canReact.canDo ? () async => await toggleFavorited(profile) : null,
    );
  }

  Widget buildCommentButton() {
    final canComment = widget.entry.getCanComment(ref);
    final tooltip =
        canComment.canDo ? 'Press to add a comment' : canComment.reason;
    return buildButton(
      Icons.comment,
      comments,
      true,
      tooltip,
      canComment.canDo ? () async => await addComment() : null,
    );
  }

  Widget buildReshareButton(Profile profile) {
    final reshareable =
        widget.entry.getIsReshareable(ref, profile, widget.isMine);
    final canReshare = reshareable.canDo;
    late final String tooltip;
    if (canReshare) {
      tooltip = youReshared ? 'Press to undo reshare' : 'Press to reshare';
    } else {
      tooltip = reshareable.reason;
    }
    return buildButton(
      youReshared ? Icons.repeat_on_outlined : Icons.repeat,
      reshares,
      true,
      tooltip,
      canReshare && !isProcessing
          ? () async => youReshared
              ? await unResharePost(profile)
              : await resharePost(profile)
          : null,
    );
  }

  @override
  Widget build(BuildContext context) {
    _logger.finest('Building: ${widget.entry.toShortString()}');
    final profile = ref.watch(activeProfileProvider);
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: [
        buildLikeButton(profile),
        buildCommentButton(),
        if (widget.entry.parentId.isEmpty) buildReshareButton(profile),
      ],
    );
  }
}