import 'package:flutter_riverpod/flutter_riverpod.dart';

import 'announcements_provider.dart';
import 'attendance_provider.dart';
import 'chat_provider.dart';
import 'it_service_request_provider.dart';
import 'leave_provider.dart';
import 'notifications_provider.dart';
import 'pass_slip_provider.dart';
import 'profile_provider.dart';
import 'tasks_provider.dart';
import 'tickets_provider.dart';
import 'user_offices_provider.dart';

/// Total count of items waiting to sync across all modules.
/// Used by the offline banner and reconnect overlay for dynamic messaging.
final pendingSyncCountProvider = Provider<int>((ref) {
  // Tasks
  final tasks = ref.watch(offlinePendingTasksProvider).length;
  final taskUpdates = ref.watch(offlinePendingTaskUpdatesProvider).length;
  final messages = ref.watch(offlinePendingMessagesProvider)
      .values
      .fold<int>(0, (sum, list) => sum + list.length);
  final assignments = ref.watch(offlinePendingAssignmentsProvider).length;
  final activityLogs =
      ref.watch(offlinePendingActivityLogItemsProvider).length;

  // Leave
  final leaves = ref.watch(offlinePendingLeavesProvider).length;
  final leaveUpdates = ref.watch(offlinePendingLeaveUpdatesProvider).length;

  // Pass slips
  final passSlips = ref.watch(offlinePendingPassSlipsProvider).length;
  final passSlipUpdates =
      ref.watch(offlinePendingPassSlipUpdatesProvider).length;

  // Announcements
  final announcements = ref.watch(offlinePendingAnnouncementsProvider).length;
  final announcementUpdates =
      ref.watch(offlinePendingAnnouncementUpdatesProvider).length;
  final announcementComments =
      ref.watch(offlinePendingAnnouncementCommentsProvider).length;

  // IT Service Requests
  final itRequests =
      ref.watch(offlinePendingItServiceRequestsProvider).length;
  final itRequestUpdates =
      ref.watch(offlinePendingItServiceRequestUpdatesProvider).length;
  final isrActions = ref.watch(offlinePendingIsrActionsProvider).length;

  // Attendance
  final checkIns = ref.watch(offlinePendingCheckInsProvider).length;
  final attendanceUpdates =
      ref.watch(offlinePendingAttendanceUpdatesProvider).length;

  // Notifications
  final notifReads =
      ref.watch(offlinePendingNotificationReadsProvider).length;
  final notifBatchReads =
      ref.watch(offlinePendingBatchNotificationReadsProvider).length;

  // Profile
  final profileUpdates =
      ref.watch(offlinePendingProfileUpdatesProvider).length;

  // Tickets
  final tickets = ref.watch(offlinePendingTicketsProvider).length;
  final ticketUpdates =
      ref.watch(offlinePendingTicketUpdatesProvider).length;

  // Offices
  final offices = ref.watch(offlinePendingOfficesProvider).length;

  // User offices
  final officeOps = ref.watch(offlinePendingUserOfficeOpsProvider).length;

  // Chat
  final chatMessages = ref.watch(offlinePendingChatMessagesProvider)
      .values
      .fold<int>(0, (sum, list) => sum + list.length);

  return tasks +
      taskUpdates +
      messages +
      assignments +
      activityLogs +
      leaves +
      leaveUpdates +
      passSlips +
      passSlipUpdates +
      announcements +
      announcementUpdates +
      announcementComments +
      itRequests +
      itRequestUpdates +
      isrActions +
      checkIns +
      attendanceUpdates +
      notifReads +
      notifBatchReads +
      profileUpdates +
      tickets +
      ticketUpdates +
      offices +
      officeOps +
      chatMessages;
});

/// Per-category breakdown of pending-sync items (only non-zero entries).
/// Keys are stable category identifiers used for icon/label lookup in the UI.
final pendingSyncBreakdownProvider = Provider<Map<String, int>>((ref) {
  final result = <String, int>{};

  final tasks = ref.watch(offlinePendingTasksProvider).length +
      ref.watch(offlinePendingTaskUpdatesProvider).length;
  if (tasks > 0) result['tasks'] = tasks;

  final tickets = ref.watch(offlinePendingTicketsProvider).length +
      ref.watch(offlinePendingTicketUpdatesProvider).length;
  if (tickets > 0) result['tickets'] = tickets;

  final messages = ref
          .watch(offlinePendingMessagesProvider)
          .values
          .fold<int>(0, (s, l) => s + l.length) +
      ref
          .watch(offlinePendingChatMessagesProvider)
          .values
          .fold<int>(0, (s, l) => s + l.length);
  if (messages > 0) result['messages'] = messages;

  final assignments = ref.watch(offlinePendingAssignmentsProvider).length;
  if (assignments > 0) result['assignments'] = assignments;

  final activityLogs =
      ref.watch(offlinePendingActivityLogItemsProvider).length;
  if (activityLogs > 0) result['activity_logs'] = activityLogs;

  final checkIns = ref.watch(offlinePendingCheckInsProvider).length;
  if (checkIns > 0) result['check_ins'] = checkIns;

  final attendanceUpdates =
      ref.watch(offlinePendingAttendanceUpdatesProvider).length;
  if (attendanceUpdates > 0) result['attendance'] = attendanceUpdates;

  final leaves = ref.watch(offlinePendingLeavesProvider).length +
      ref.watch(offlinePendingLeaveUpdatesProvider).length;
  if (leaves > 0) result['leaves'] = leaves;

  final passSlips = ref.watch(offlinePendingPassSlipsProvider).length +
      ref.watch(offlinePendingPassSlipUpdatesProvider).length;
  if (passSlips > 0) result['pass_slips'] = passSlips;

  final announcements = ref.watch(offlinePendingAnnouncementsProvider).length +
      ref.watch(offlinePendingAnnouncementUpdatesProvider).length +
      ref.watch(offlinePendingAnnouncementCommentsProvider).length;
  if (announcements > 0) result['announcements'] = announcements;

  final itRequests = ref.watch(offlinePendingItServiceRequestsProvider).length +
      ref.watch(offlinePendingItServiceRequestUpdatesProvider).length +
      ref.watch(offlinePendingIsrActionsProvider).length;
  if (itRequests > 0) result['it_requests'] = itRequests;

  final notifReads = ref.watch(offlinePendingNotificationReadsProvider).length +
      ref.watch(offlinePendingBatchNotificationReadsProvider).length;
  if (notifReads > 0) result['notification_reads'] = notifReads;

  final profileUpdates =
      ref.watch(offlinePendingProfileUpdatesProvider).length;
  if (profileUpdates > 0) result['profile_updates'] = profileUpdates;

  final officeChanges = ref.watch(offlinePendingOfficesProvider).length +
      ref.watch(offlinePendingUserOfficeOpsProvider).length;
  if (officeChanges > 0) result['office_changes'] = officeChanges;

  return result;
});