'use client';

import { useState } from 'react';
import { AlertTriangle, ImageIcon, Loader2 } from 'lucide-react';
import Image from 'next/image';

import { Dialog, DialogContent, DialogTitle } from '@/components/ui/dialog';
import { useProtectedMediaObjectUrl } from '@/hooks/useProtectedMedia';
import type { BoundingBoxOverlayItem, DetectionResultItem } from '@/types';

import BoundingBoxOverlay from '@/components/annotation/boundingBoxOverlay';

interface AnnotatedDetectionImageProps {
  detection?: DetectionResultItem;
  videoWidth: number;
  videoHeight: number;
  aspectRatio?: string;
  enableLightbox?: boolean;
}

export default function AnnotatedDetectionImage({
  detection,
  videoWidth,
  videoHeight,
  aspectRatio: aspectRatioOverride,
  enableLightbox = false,
}: AnnotatedDetectionImageProps) {
  const [isPreviewOpen, setIsPreviewOpen] = useState(false);
  const { objectUrl, isLoading, isError } = useProtectedMediaObjectUrl(
    detection?.detection.context_image_url,
  );
  const overlayDetections: BoundingBoxOverlayItem[] = detection
    ? [
        {
          id: detection.id,
          class_name: detection.detection.class_name,
          display_name: detection.detection.display_name,
          confidence: detection.detection.confidence,
          bounding_box: detection.detection.bounding_box,
        },
      ]
    : [];

  const aspectRatio =
    aspectRatioOverride ??
    (videoWidth > 0 && videoHeight > 0
      ? `${videoWidth} / ${videoHeight}`
      : '16 / 9');

  const annotatedMedia = objectUrl ? (
    <>
      <Image
        src={objectUrl}
        alt={`${detection?.detection.display_name ?? 'Road defect'} detection`}
        fill
        unoptimized
        sizes="(min-width: 1280px) 18rem, (min-width: 640px) 50vw, 100vw"
        className="object-contain"
      />
      <BoundingBoxOverlay
        detections={overlayDetections}
        videoWidth={videoWidth}
        videoHeight={videoHeight}
      />
    </>
  ) : null;

  if (detection && objectUrl && enableLightbox) {
    return (
      <>
        <button
          type="button"
          onClick={() => setIsPreviewOpen(true)}
          aria-label={`Open ${detection.detection.display_name} detection image`}
          className="group relative flex w-full cursor-zoom-in items-center justify-center overflow-hidden rounded-lg border bg-black focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2"
          style={{ aspectRatio }}
        >
          <Image
            src={objectUrl}
            alt={`${detection.detection.display_name} detection`}
            fill
            unoptimized
            sizes="(min-width: 1280px) 18rem, (min-width: 640px) 50vw, 100vw"
            className="object-contain"
          />
          <span className="pointer-events-none absolute inset-x-0 bottom-0 z-[3] bg-gradient-to-t from-black/70 to-transparent px-3 pb-2 pt-8 text-center text-xs font-medium text-white opacity-0 transition-opacity group-hover:opacity-100 group-focus-visible:opacity-100">
            Click to view annotated image
          </span>
        </button>

        <Dialog open={isPreviewOpen} onOpenChange={setIsPreviewOpen}>
          <DialogContent className="h-[calc(100vh-2rem)] bg-black/95 p-4 text-white sm:max-w-[calc(100vw-2rem)]">
            <DialogTitle className="sr-only">
              {detection.detection.display_name} annotated detection image
            </DialogTitle>
            <div className="relative min-h-0 w-full flex-1 overflow-hidden rounded-lg bg-black">
              {annotatedMedia}
            </div>
          </DialogContent>
        </Dialog>
      </>
    );
  }

  return (
    <div
      className="relative flex w-full items-center justify-center overflow-hidden rounded-lg border bg-black"
      style={{ aspectRatio }}
    >
      {!detection ? (
        <div className="flex flex-col items-center gap-2 text-muted-foreground">
          <ImageIcon className="size-7" />
          <p>Select a detection to view its image.</p>
        </div>
      ) : isLoading ? (
        <div className="flex flex-col items-center gap-2 text-muted-foreground">
          <Loader2 className="size-7 animate-spin text-primary" />
          <p>Loading detection image...</p>
        </div>
      ) : isError || !objectUrl ? (
        <div className="flex flex-col items-center gap-2 text-destructive">
          <AlertTriangle className="size-7" />
          <p>Failed to load the detection image.</p>
        </div>
      ) : (
        annotatedMedia
      )}
    </div>
  );
}