import { useMutation, useQueryClient } from '@tanstack/react-query';
import { supabase } from '@/lib/supabaseClient';
import { queryKeys } from '@/lib/queryKeys';
import { toast } from 'sonner';
import { breadcrumb } from '@/lib/errorBreadcrumbs';
import type { GroupedAlert } from './useGroupedAlerts';

export function useResolveAlertGroup() {
  const queryClient = useQueryClient();

  return useMutation({
    mutationFn: async ({ 
      alertIds, 
      source 
    }: { 
      alertIds: string[]; 
      source: 'system' | 'rate_limit';
    }) => {
      const table = source === 'system' ? 'system_alerts' : 'rate_limit_alerts';
      
      // Log breadcrumb for debugging
      breadcrumb.userAction(`resolve-alerts`, 'AlertGroupActions', {
        alertIds,
        source,
        count: alertIds.length,
      });
      
      const { data, error } = await supabase
        .from(table)
        .update({ resolved_at: new Date().toISOString() })
        .in('id', alertIds)
        .select();
      
      if (error) {
        // Enhanced error handling with specific messages
        if (error.code === '42501') {
          throw new Error('Permission denied. You do not have access to resolve these alerts.');
        } else if (error.code === 'PGRST116') {
          throw new Error('No alerts found to resolve. They may have already been resolved.');
        } else {
          console.error('Supabase error details:', error);
          throw new Error(`Failed to resolve alerts: ${error.message}`);
        }
      }
      
      return { count: alertIds.length, updatedAlerts: data };
    },
    onMutate: async ({ alertIds }) => {
      // Cancel any outgoing refetches
      await queryClient.cancelQueries({ 
        queryKey: queryKeys.monitoring.groupedAlerts() 
      });

      const previousData = queryClient.getQueryData(
        queryKeys.monitoring.groupedAlerts()
      );

      // Optimistically update to the new value
      queryClient.setQueryData(
        queryKeys.monitoring.groupedAlerts(),
        (old: GroupedAlert[] | undefined) => {
          if (!old) return old;
          return old.map(alert => {
            const hasMatchingIds = alert.alert_ids.some(id => 
              alertIds.includes(id)
            );
            if (hasMatchingIds) {
              return {
                ...alert,
                unresolved_count: 0,
                has_resolved: true,
              };
            }
            return alert;
          });
        }
      );

      return { previousData };
    },
    onSuccess: (data) => {
      toast.success(`Resolved ${data.count} alert${data.count > 1 ? 's' : ''}`);
    },
    onError: (error: Error, variables, context) => {
      // Rollback on error
      if (context?.previousData) {
        queryClient.setQueryData(
          queryKeys.monitoring.groupedAlerts(),
          context.previousData
        );
      }
      
      // Show detailed error message
      toast.error(error.message || 'Failed to resolve alerts', {
        description: 'Please try again or contact support if the issue persists.',
        duration: 5000,
      });
      
      // Log to error tracking system
      breadcrumb.apiCall('resolve-alerts', 'POST', 500);
      console.error('Error resolving alert group:', error, {
        alertIds: variables.alertIds,
        source: variables.source,
      });
    },
    onSettled: () => {
      queryClient.invalidateQueries({ 
        queryKey: queryKeys.monitoring.groupedAlerts() 
      });
      queryClient.invalidateQueries({ 
        queryKey: queryKeys.monitoring.combinedAlerts() 
      });
    },
  });
}

export function useSnoozeAlertGroup() {
  const queryClient = useQueryClient();

  return useMutation({
    mutationFn: async ({ 
      groupKey, 
      duration 
    }: { 
      groupKey: string; 
      duration: number;
    }) => {
      const snoozedAlerts = JSON.parse(
        localStorage.getItem('snoozed_alerts') || '{}'
      );
      snoozedAlerts[groupKey] = Date.now() + duration;
      localStorage.setItem('snoozed_alerts', JSON.stringify(snoozedAlerts));
      return { groupKey, until: snoozedAlerts[groupKey] };
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ 
        queryKey: queryKeys.monitoring.groupedAlerts() 
      });
      toast.success('Alert group snoozed');
    },
  });
}