import { useState } from 'react';
import { Camera, Upload, Loader2, X } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { Textarea } from '@/components/ui/textarea';
import { Card, CardContent } from '@/components/ui/card';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogHeader,
  DialogTitle,
  DialogTrigger,
} from '@/components/ui/dialog';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { useNostrPublish } from '@/hooks/useNostrPublish';
import { useUploadFile } from '@/hooks/useUploadFile';
import { useToast } from '@/hooks/useToast';
import { useQueryClient } from '@tanstack/react-query';
import { PHOTO_CONTRIBUTION_KIND } from '@/hooks/useSpotContributions';
import { SKATE_SPOT_KIND } from '@/lib/types';
import { LoginArea } from '@/components/auth/LoginArea';

interface AddPhotoToSpotProps {
  spotPubkey: string;
  spotIdentifier: string;
  spotTitle: string;
}

export function AddPhotoToSpot({ spotPubkey, spotIdentifier, spotTitle }: AddPhotoToSpotProps) {
  const { user } = useCurrentUser();
  const { mutateAsync: publishEvent, isPending: isPublishing } = useNostrPublish();
  const { mutateAsync: uploadFile, isPending: isUploading } = useUploadFile();
  const { toast } = useToast();
  const queryClient = useQueryClient();
  
  const [open, setOpen] = useState(false);
  const [caption, setCaption] = useState('');
  const [uploadedImage, setUploadedImage] = useState<{ url: string; mimeType?: string } | null>(null);
  
  const spotRef = `${SKATE_SPOT_KIND}:${spotPubkey}:${spotIdentifier}`;
  
  const handleImageUpload = async (e: React.ChangeEvent<HTMLInputElement>) => {
    const files = e.target.files;
    if (!files || files.length === 0) return;
    
    try {
      const file = files[0];
      const tags = await uploadFile(file);
      const url = tags.find(([name]) => name === 'url')?.[1];
      const mimeType = tags.find(([name]) => name === 'm')?.[1];
      
      if (url) {
        setUploadedImage({ url, mimeType });
        toast({
          title: 'Photo uploaded',
          description: 'Add a caption and submit to contribute!',
        });
      }
    } catch (error) {
      toast({
        title: 'Upload failed',
        description: error instanceof Error ? error.message : 'Failed to upload photo',
        variant: 'destructive',
      });
    }
    
    e.target.value = '';
  };
  
  const handleSubmit = async () => {
    if (!uploadedImage) {
      toast({
        title: 'No photo',
        description: 'Please upload a photo first.',
        variant: 'destructive',
      });
      return;
    }
    
    try {
      // Create kind 1063 file metadata event
      const eventTags: string[][] = [
        ['url', uploadedImage.url],
        ['a', spotRef],
        ['alt', `Community photo for ${spotTitle}`],
      ];
      
      if (uploadedImage.mimeType) {
        eventTags.push(['m', uploadedImage.mimeType]);
      }
      
      await publishEvent({
        kind: PHOTO_CONTRIBUTION_KIND,
        content: caption.trim(),
        tags: eventTags,
      });
      
      toast({
        title: 'Photo contributed!',
        description: 'Your photo has been added to this spot.',
      });
      
      // Reset and close
      setCaption('');
      setUploadedImage(null);
      setOpen(false);
      
      // Invalidate the photos query
      queryClient.invalidateQueries({ queryKey: ['spot-photos', spotPubkey, spotIdentifier] });
    } catch (error) {
      toast({
        title: 'Failed to contribute',
        description: error instanceof Error ? error.message : 'Something went wrong',
        variant: 'destructive',
      });
    }
  };
  
  const handleClose = () => {
    setOpen(false);
    setCaption('');
    setUploadedImage(null);
  };
  
  return (
    <Dialog open={open} onOpenChange={setOpen}>
      <DialogTrigger asChild>
        <Button variant="outline" size="sm" className="gap-2">
          <Camera className="h-4 w-4" />
          Add Photo
        </Button>
      </DialogTrigger>
      <DialogContent className="sm:max-w-md">
        <DialogHeader>
          <DialogTitle className="flex items-center gap-2">
            <Camera className="h-5 w-5 text-[#ff0040]" />
            Add Photo to Spot
          </DialogTitle>
          <DialogDescription>
            Contribute a photo to help others discover this spot.
          </DialogDescription>
        </DialogHeader>
        
        {!user ? (
          <div className="py-6 text-center">
            <p className="text-muted-foreground mb-4">Log in to contribute photos</p>
            <LoginArea className="justify-center" />
          </div>
        ) : (
          <div className="space-y-4">
            {/* Photo upload area */}
            {uploadedImage ? (
              <div className="relative">
                <img
                  src={uploadedImage.url}
                  alt="Uploaded"
                  className="w-full aspect-video object-cover rounded-lg"
                />
                <Button
                  variant="destructive"
                  size="icon"
                  className="absolute top-2 right-2 h-8 w-8"
                  onClick={() => setUploadedImage(null)}
                >
                  <X className="h-4 w-4" />
                </Button>
              </div>
            ) : (
              <Card className="border-dashed">
                <CardContent className="py-8">
                  <label className="flex flex-col items-center cursor-pointer">
                    <input
                      type="file"
                      accept="image/*"
                      className="hidden"
                      onChange={handleImageUpload}
                      disabled={isUploading}
                    />
                    {isUploading ? (
                      <>
                        <Loader2 className="h-10 w-10 animate-spin text-muted-foreground mb-2" />
                        <span className="text-sm text-muted-foreground">Uploading...</span>
                      </>
                    ) : (
                      <>
                        <Upload className="h-10 w-10 text-muted-foreground mb-2" />
                        <span className="text-sm text-muted-foreground">Click to upload a photo</span>
                        <span className="text-xs text-muted-foreground mt-1">JPG, PNG, WebP</span>
                      </>
                    )}
                  </label>
                </CardContent>
              </Card>
            )}
            
            {/* Caption */}
            <div className="space-y-2">
              <Textarea
                placeholder="Add a caption (optional) - describe what's in the photo, when it was taken, etc."
                value={caption}
                onChange={(e) => setCaption(e.target.value)}
                rows={3}
              />
            </div>
            
            {/* Actions */}
            <div className="flex gap-2 justify-end">
              <Button variant="outline" onClick={handleClose}>
                Cancel
              </Button>
              <Button
                onClick={handleSubmit}
                disabled={!uploadedImage || isPublishing}
                className="bg-[#ff0040] hover:bg-[#ff0040]/90"
              >
                {isPublishing ? (
                  <>
                    <Loader2 className="h-4 w-4 mr-2 animate-spin" />
                    Contributing...
                  </>
                ) : (
                  <>
                    <Camera className="h-4 w-4 mr-2" />
                    Contribute Photo
                  </>
                )}
              </Button>
            </div>
          </div>
        )}
      </DialogContent>
    </Dialog>
  );
}