import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:logging/logging.dart';
import 'package:result_monad/result_monad.dart';
import 'package:riverpod_annotation/riverpod_annotation.dart';
import 'package:stack_trace/stack_trace.dart';

import '../data/interfaces/circles_repo_intf.dart';
import '../data/memory/memory_circles_repo.dart';
import '../models/auth/profile.dart';
import '../models/connection.dart';
import '../models/exec_error.dart';
import '../models/networking/paging_data.dart';
import '../models/timeline_grouping_list_data.dart';
import 'connection_manager_services.dart';
import 'networking/friendica_timeline_grouping_client_services.dart';

part 'circles_repo_services.g.dart';

final _crLogger = Logger('CirclesRepoProvider');

@Riverpod(keepAlive: true)
class _CirclesRepo extends _$CirclesRepo {
  @override
  ICirclesRepo build(Profile profile) {
    _crLogger.info('Creating for $profile');
    return MemoryCirclesRepo();
  }

  Future<Result<List<TimelineGroupingListData>, ExecError>>
      refreshCircleData() async {
    _crLogger.info('Refreshing member circle data ');
    return await ref
        .read(timelineGroupingListDataClientProvider(profile).future)
        .andThen((circles) {
      state.clearMyCircles();
      state.addAllCircles(circles);
      ref.notifyListeners();
      return Result.ok(state.getMyCircles());
    }).withError(
      (error) {
        _crLogger.severe('Error getting list data: $error', Trace.current());
      },
    ).execErrorCastAsync();
  }
}

final _cpLogger = Logger('CirclesProvider');

@Riverpod(keepAlive: true)
class Circles extends _$Circles {
  @override
  List<TimelineGroupingListData> build(Profile profile) {
    _cpLogger.info('Creating for $profile');
    profile = profile;
    final circles = ref.watch(_circlesRepoProvider(profile)).getMyCircles();
    if (circles.isEmpty) {
      Future.delayed(const Duration(milliseconds: 1), refresh);
    }
    return circles;
  }

  Future<void> refresh() async {
    _cpLogger.info('Refreshing circles provider');
    await ref
        .read(_circlesRepoProvider(profile).notifier)
        .refreshCircleData()
        .withResult((circles) => state = circles);
  }

  void upsertCircle(TimelineGroupingListData circle) {
    ref.read(_circlesRepoProvider(profile)).upsertCircle(circle);
    state = ref.read(_circlesRepoProvider(profile)).getMyCircles();
  }

  FutureResult<TimelineGroupingListData, ExecError> createCircle(
      String newName) async {
    final result = await ref
        .read(createCircleProvider(profile, newName).future)
        .withResult((newCircle) {
      ref.read(_circlesRepoProvider(profile)).upsertCircle(newCircle);
      state = ref.read(_circlesRepoProvider(profile)).getMyCircles();
    });
    return result.execErrorCast();
  }

  FutureResult<bool, ExecError> deleteCircle(
      TimelineGroupingListData circleData) async {
    final result = await ref
        .read(deleteCircleProvider(profile, circleData).future)
        .withResult((_) {
      ref.read(_circlesRepoProvider(profile)).deleteCircle(circleData);
      state = ref.read(_circlesRepoProvider(profile)).getMyCircles();
    });
    return result.execErrorCast();
  }

  void clear() {
    ref.read(_circlesRepoProvider(profile)).clear();
    state = ref.read(_circlesRepoProvider(profile)).getMyCircles();
  }

  void addAllCircles(List<TimelineGroupingListData> circles) {
    ref.read(_circlesRepoProvider(profile)).addAllCircles(circles);
    state = ref.read(_circlesRepoProvider(profile)).getMyCircles();
  }

  Result<List<TimelineGroupingListData>, ExecError> getCirclesForUser(
      String id) {
    final result =
        ref.read(_circlesRepoProvider(profile)).getCirclesForUser(id);
    if (result.isSuccess) {
      _cpLogger.finer("Circles for user $id: $result");
      return result;
    }

    if (result.isFailure && result.error.type != ErrorType.notFound) {
      return result;
    }

    refreshConnectionCircleData(id, true);
    return Result.ok([]);
  }

  bool updateConnectionCircleData(
          String id, List<TimelineGroupingListData> currentCircles) =>
      ref
          .read(_circlesRepoProvider(profile))
          .updateConnectionCircleData(id, currentCircles);

  FutureResult<TimelineGroupingListData, ExecError> renameCircle(
      String id, String newName) async {
    // TODO retire old members provider?
    final result = await ref
        .read(renameCircleProvider(profile, id, newName).future)
        .withResult((renamedCircle) {
      ref.read(_circlesRepoProvider(profile)).upsertCircle(renamedCircle);
      state = ref.read(_circlesRepoProvider(profile)).getMyCircles();
    });
    return result.execErrorCast();
  }

  Future<void> refreshConnectionCircleData(
      String id, bool withNotification) async {
    _cpLogger.finest('Refreshing member list data for Connection $id');
    await ref
        .read(memberCirclesForConnectionProvider(profile, id).future)
        .match(
      onSuccess: (circles) {
        updateConnectionCircleData(id, circles);
        if (withNotification) {
          state = ref.read(_circlesRepoProvider(profile)).getMyCircles();
        }
      },
      onError: (error) {
        _cpLogger.severe(
          'Error getting list data for $id: $error',
          Trace.current(),
        );
      },
    );
  }
}

@Riverpod(keepAlive: true)
class CircleMembers extends _$CircleMembers {
  @override
  List<Connection> build(Profile profile, TimelineGroupingListData circle) {
    return ref
        .read(_circlesRepoProvider(profile))
        .getCircleMembers(circle)
        .getValueOrElse(() => []);
  }

  FutureResult<bool, ExecError> addConnectionToCircle(
    Connection connection,
  ) async {
    _cpLogger.finest('Adding ${connection.name} to circle: ${circle.name}');
    return await ref
        .read(addConnectionToCircleProvider(profile, circle, connection).future)
        .withResult((_) {
      ref
          .read(_circlesRepoProvider(profile))
          .addConnectionToCircle(circle, connection);
      _setState(ref
          .read(_circlesRepoProvider(profile))
          .getCircleMembers(circle)
          .getValueOrElse(() => []));
    }).mapError((error) {
      _cpLogger.severe(
        'Error adding ${connection.name} from circle: ${circle.name}',
        Trace.current(),
      );
      return error;
    });
  }

  FutureResult<bool, ExecError> removeConnectionFromCircle(
      Connection connection) async {
    return ref
        .read(removeConnectionFromCircleProvider(profile, circle, connection)
            .future)
        .withResult((_) => ref
            .read(_circlesRepoProvider(profile))
            .removeConnectionFromCircle(circle, connection))
        .withResult((_) => _setState(ref
            .read(_circlesRepoProvider(profile))
            .getCircleMembers(circle)
            .getValueOrElse(() => [])))
        .mapError(
      (error) {
        _cpLogger.severe(
          'Error removing ${connection.name} from circle: ${circle.name}',
          Trace.current(),
        );
        return error;
      },
    );
  }

  Future<void> refreshCircleMemberships() async {
    _cpLogger.info('Refreshing Circle Memberships for ${circle.name}');
    var page = const PagingData(limit: 50);
    final allResults = <Connection>{};
    var moreResults = true;
    while (moreResults) {
      await ref
          .read(circleMembersNetworkProvider(profile, circle, page).future)
          .match(onSuccess: (results) {
        _cpLogger
            .info('Received next set of memberships for Circle ${circle.name}');
        moreResults = results.data.isNotEmpty && results.next != null;
        page = results.next ?? page;
        allResults.addAll(results.data);
      }, onError: (error) {
        _cpLogger.severe(
          'Error getting circle listing data: $error',
          Trace.current(),
        );
        moreResults = false;
      });
    }

    ref.read(_circlesRepoProvider(profile)).deleteCircle(circle);
    ref.read(_circlesRepoProvider(profile)).upsertCircle(circle);
    _cpLogger.info(
        'Adding ${allResults.length} Updated Memberships for ${circle.name}');
    for (final c in allResults) {
      await ref
          .read(connectionModifierProvider(profile, c).notifier)
          .upsertConnection(c);
      ref.read(_circlesRepoProvider(profile)).addConnectionToCircle(circle, c);
    }
    _setState(allResults.toList());
    _cpLogger.info(
        'Completed ${allResults.length} updating memberships for ${circle.name}');
  }

  void _setState(List<Connection> newState) {
    newState.sort((c1, c2) => c1.name.compareTo(c2.name));
    state = newState;
  }
}

final _tglLogger = Logger('TimelineGroupingListProvider');

@riverpod
Result<TimelineGroupingListData, ExecError> circleData(
    Ref ref, Profile profile, String id) {
  final circles = ref.watch(circlesProvider(profile)).where((c) => c.id == id);
  if (circles.isEmpty) {
    return buildErrorResult(
      type: ErrorType.notFound,
      message: 'Circle not found: $id',
    );
  }

  return Result.ok(circles.first);
}

@riverpod
List<TimelineGroupingListData> timelineGroupingList(
    Ref ref, Profile profile, GroupingType type) {
  _tglLogger.info('Creating for $type for $profile');
  final circles = ref.watch(circlesProvider(profile));
  final result = circles.where((e) => e.groupingType == type).toList();
  result.sort((g1, g2) => g1.name.compareTo(g2.name));
  return result;
}