import { useState, useEffect } from 'react';
import { supabase } from '@/lib/supabaseClient';
import { Button } from '@/components/ui/button';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog';
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from '@/components/ui/alert-dialog';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import { Textarea } from '@/components/ui/textarea';
import { useToast } from '@/hooks/use-toast';
import { Trash2, Pencil } from 'lucide-react';
import { Card, CardContent } from '@/components/ui/card';
import { getErrorMessage } from '@/lib/errorHandler';

interface Photo {
  id: string;
  cloudflare_image_id: string;
  cloudflare_image_url: string;
  title: string | null;
  caption: string | null;
  order_index: number;
  is_featured: boolean;
}

interface PhotoManagementDialogProps {
  entityId: string;
  entityType: string;
  open: boolean;
  onOpenChange: (open: boolean) => void;
  onUpdate?: () => void;
}

export function PhotoManagementDialog({
  entityId,
  entityType,
  open,
  onOpenChange,
  onUpdate,
}: PhotoManagementDialogProps) {
  const [photos, setPhotos] = useState<Photo[]>([]);
  const [loading, setLoading] = useState(false);
  const [editingPhoto, setEditingPhoto] = useState<Photo | null>(null);
  const [deleteDialogOpen, setDeleteDialogOpen] = useState(false);
  const [photoToDelete, setPhotoToDelete] = useState<Photo | null>(null);
  const [deleteReason, setDeleteReason] = useState('');
  const { toast } = useToast();

  useEffect(() => {
    if (open) {
      fetchPhotos();
    }
  }, [open, entityId, entityType]);

  const fetchPhotos = async () => {
    setLoading(true);
    try {
      const { data, error } = await supabase
        .from('photos')
        .select('id, cloudflare_image_id, cloudflare_image_url, title, caption, order_index, is_featured')
        .eq('entity_type', entityType)
        .eq('entity_id', entityId)
        .order('order_index', { ascending: true });

      if (error) throw error;
      setPhotos((data || []).map(p => ({
        ...p,
        order_index: p.order_index ?? 0,
        is_featured: p.is_featured ?? false
      })) as Photo[]);
    } catch (error: unknown) {
      toast({
        title: 'Error',
        description: getErrorMessage(error),
        variant: 'destructive',
      });
    } finally {
      setLoading(false);
    }
  };



  const handleDeleteClick = (photo: Photo) => {
    setPhotoToDelete(photo);
    setDeleteReason('');
    setDeleteDialogOpen(true);
  };

  const requestPhotoDelete = async () => {
    if (!photoToDelete || !deleteReason.trim()) return;

    try {
      // Get current user
      const { data: { user } } = await supabase.auth.getUser();
      if (!user) throw new Error('Not authenticated');

      // Fetch entity name from database based on entity type
      let entityName = 'Unknown';
      
      try {
        if (entityType === 'park') {
          const { data } = await supabase.from('parks').select('name').eq('id', entityId).single();
          if (data?.name) entityName = data.name;
        } else if (entityType === 'ride') {
          const { data } = await supabase.from('rides').select('name').eq('id', entityId).single();
          if (data?.name) entityName = data.name;
        } else if (entityType === 'ride_model') {
          const { data } = await supabase.from('ride_models').select('name').eq('id', entityId).single();
          if (data?.name) entityName = data.name;
        } else if (['manufacturer', 'operator', 'designer', 'property_owner'].includes(entityType)) {
          const { data } = await supabase.from('companies').select('name').eq('id', entityId).single();
          if (data?.name) entityName = data.name;
        }
      } catch {
        // Failed to fetch entity name - use default
      }

      // Create content submission
      const { data: submission, error: submissionError } = await supabase
        .from('content_submissions')
        .insert([{
          user_id: user.id,
          submission_type: 'photo_delete',
          content: {
            action: 'delete',
            photo_id: photoToDelete.id
          }
        }])
        .select()
        .single();

      if (submissionError) throw submissionError;

      // Create submission item with all necessary data
      const { error: itemError } = await supabase
        .from('submission_items')
        .insert({
          submission_id: submission.id,
          item_type: 'photo_delete',
          item_data: {
            photo_id: photoToDelete.id,
            cloudflare_image_id: photoToDelete.cloudflare_image_id,
            entity_type: entityType,
            entity_id: entityId,
            entity_name: entityName,
            cloudflare_image_url: photoToDelete.cloudflare_image_url,
            title: photoToDelete.title,
            caption: photoToDelete.caption,
            deletion_reason: deleteReason
          },
          status: 'pending'
        });

      if (itemError) throw itemError;

      toast({
        title: 'Delete request submitted',
        description: 'Your photo deletion request has been submitted for moderation',
      });
      setDeleteDialogOpen(false);
      setPhotoToDelete(null);
      setDeleteReason('');
      onOpenChange(false);
    } catch (error: unknown) {
      toast({
        title: 'Error',
        description: getErrorMessage(error),
        variant: 'destructive',
      });
    }
  };

  const requestPhotoEdit = async () => {
    if (!editingPhoto) return;

    try {
      // Get current user
      const { data: { user } } = await supabase.auth.getUser();
      if (!user) throw new Error('Not authenticated');

      // Get original photo data
      const originalPhoto = photos.find(p => p.id === editingPhoto.id);
      if (!originalPhoto) throw new Error('Original photo not found');

      // Create content submission
      const { data: submission, error: submissionError } = await supabase
        .from('content_submissions')
        .insert([{
          user_id: user.id,
          submission_type: 'photo_edit',
          content: {
            action: 'edit',
            photo_id: editingPhoto.id
          }
        }])
        .select()
        .single();

      if (submissionError) throw submissionError;

      // Create submission item
      const { error: itemError } = await supabase
        .from('submission_items')
        .insert({
          submission_id: submission.id,
          item_type: 'photo_edit',
          item_data: {
            photo_id: editingPhoto.id,
            entity_type: entityType,
            entity_id: entityId,
            new_caption: editingPhoto.caption,
            cloudflare_image_url: editingPhoto.cloudflare_image_url,
          },
          original_data: {
            caption: originalPhoto.caption,
          },
          status: 'pending'
        });

      if (itemError) throw itemError;

      setEditingPhoto(null);
      toast({
        title: 'Edit request submitted',
        description: 'Your photo edit has been submitted for moderation',
      });
      onOpenChange(false);
    } catch (error: unknown) {
      toast({
        title: 'Error',
        description: getErrorMessage(error),
        variant: 'destructive',
      });
    }
  };

  if (editingPhoto) {
    return (
      <Dialog open={open} onOpenChange={onOpenChange}>
        <DialogContent className="max-w-[95vw] sm:max-w-2xl">
          <DialogHeader>
            <DialogTitle>Edit Photo</DialogTitle>
            <DialogDescription>Update photo caption</DialogDescription>
          </DialogHeader>

          <div className="space-y-4">
            <div className="aspect-video w-full overflow-hidden rounded-lg">
              <img
                src={editingPhoto.cloudflare_image_url}
                alt={editingPhoto.caption || 'Photo'}
                className="w-full h-full object-cover"
              />
            </div>

            <div className="space-y-2">
              <Label htmlFor="caption">Caption</Label>
              <Textarea
                id="caption"
                value={editingPhoto.caption || ''}
                onChange={(e) =>
                  setEditingPhoto({ ...editingPhoto, caption: e.target.value })
                }
                placeholder="Photo caption"
                rows={3}
              />
            </div>
          </div>

          <DialogFooter>
            <Button variant="outline" onClick={() => setEditingPhoto(null)}>
              Cancel
            </Button>
            <Button onClick={requestPhotoEdit}>Submit for Review</Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    );
  }

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="max-w-[95vw] sm:max-w-2xl lg:max-w-4xl max-h-[80vh] overflow-y-auto p-3 sm:p-6">
        <DialogHeader>
          <DialogTitle>Manage Photos</DialogTitle>
          <DialogDescription>
            Edit or delete photos for this entity
          </DialogDescription>
        </DialogHeader>

        {loading ? (
          <div className="flex items-center justify-center py-8">
            <div className="animate-pulse">Loading photos...</div>
          </div>
        ) : photos.length === 0 ? (
          <div className="text-center py-8 text-muted-foreground">
            No photos to manage
          </div>
        ) : (
          <div className="space-y-4">
            {photos.map((photo, index) => (
              <Card key={photo.id}>
                <CardContent className="p-3 sm:p-4">
                  <div className="flex flex-col sm:flex-row gap-3 sm:gap-4">
                    <div className="w-full aspect-video sm:w-32 sm:h-32 flex-shrink-0 overflow-hidden rounded-lg">
                      <img
                        src={photo.cloudflare_image_url}
                        alt={photo.caption || 'Photo'}
                        className="w-full h-full object-cover"
                      />
                    </div>

                    <div className="flex-1 space-y-2">
                      <div>
                        <p className="text-sm sm:text-base text-foreground">
                          {photo.caption || (
                            <span className="text-muted-foreground italic">No caption</span>
                          )}
                        </p>
                      </div>

                      <div className="flex flex-wrap gap-2">
                        <Button
                          size="sm"
                          variant="outline"
                          onClick={() => setEditingPhoto(photo)}
                          className="flex-1 sm:flex-initial"
                        >
                          <Pencil className="w-4 h-4 mr-2" />
                          Request Edit
                        </Button>
                        <Button
                          size="sm"
                          variant="destructive"
                          onClick={() => handleDeleteClick(photo)}
                          className="flex-1 sm:flex-initial"
                        >
                          <Trash2 className="w-4 h-4 mr-2" />
                          Request Delete
                        </Button>
                      </div>
                    </div>
                  </div>
                </CardContent>
              </Card>
            ))}
          </div>
        )}

        <DialogFooter>
          <Button variant="outline" onClick={() => onOpenChange(false)}>
            Close
          </Button>
        </DialogFooter>
      </DialogContent>

      <AlertDialog open={deleteDialogOpen} onOpenChange={setDeleteDialogOpen}>
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle>Request Photo Deletion</AlertDialogTitle>
            <AlertDialogDescription>
              Please provide a reason for deleting this photo. This request will be reviewed by moderators.
            </AlertDialogDescription>
          </AlertDialogHeader>
          
          <div className="space-y-2">
            <Label htmlFor="delete-reason">Reason for deletion</Label>
            <Textarea
              id="delete-reason"
              value={deleteReason}
              onChange={(e) => setDeleteReason(e.target.value)}
              placeholder="Please explain why this photo should be deleted..."
              rows={3}
            />
          </div>

          <AlertDialogFooter>
            <AlertDialogCancel onClick={() => {
              setDeleteDialogOpen(false);
              setPhotoToDelete(null);
              setDeleteReason('');
            }}>
              Cancel
            </AlertDialogCancel>
            <AlertDialogAction
              onClick={requestPhotoDelete}
              disabled={!deleteReason.trim()}
            >
              Submit Request
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>
    </Dialog>
  );
}
