"use client";

import { useEffect, useRef } from "react";
import type { Camera, CameraProviderFeed } from "@/lib/types";
import { CameraFeed } from "@/components/CameraFeed";
import { SourceCredit, fetchedLabel } from "@/components/SourceCredit";

/**
 * Level 3 of the wall: one camera, large. Esc / Back steps up to the incident.
 *
 * Camera detections (the mockup's boxes + per-class counts) are NOT built:
 * blocked on server-26#199 (NYSDOT's written answer on imagery analytics) and
 * #200 (CISO ruling on retention). The seam is `CameraSignalSink` in c2-core
 * (app/internal/cameras/base.py); this panel only states that plainly.
 */
export function CameraDrill({
  camera, feed, distanceKm, incidentTitle, pinned, onTogglePin, onClose,
}: {
  camera: Camera;
  feed?: CameraProviderFeed;
  distanceKm?: number | null;
  incidentTitle?: string | null;
  pinned: boolean;
  onTogglePin: () => void;
  onClose: () => void;
}) {
  const closeRef = useRef<HTMLButtonElement>(null);
  useEffect(() => { closeRef.current?.focus(); }, [camera.id]);

  return (
    <div className="fixed inset-0 z-[2000] bg-black/70 flex items-center justify-center p-4" role="dialog" aria-modal="true"
      aria-labelledby="drb-drill-title" onClick={onClose}>
      <div className="bg-surface border border-line-strong rounded-xl shadow-2xl w-full max-w-5xl max-h-full overflow-y-auto grid md:grid-cols-[minmax(0,1fr)_300px]"
        onClick={(e) => e.stopPropagation()}>
        <CameraFeed camera={camera} priority="high" credit={feed} className="w-full aspect-video bg-black md:rounded-l-xl" />
        <div className="p-4 space-y-3 text-sm">
          <div className="flex items-start gap-2">
            <h2 id="drb-drill-title" className="flex-1 font-semibold text-ink leading-snug">{camera.name || camera.id}</h2>
            <button ref={closeRef} type="button" onClick={onClose} className="text-xs border border-line rounded px-2 py-1 hover:bg-raised" aria-label="Close camera">Esc</button>
          </div>
          <dl className="grid grid-cols-[auto_1fr] gap-x-3 gap-y-1 text-xs">
            <dt className="text-ink-muted">Source</dt><dd className="text-ink-2">{feed?.name ?? camera.provider}</dd>
            {camera.roadway && (<><dt className="text-ink-muted">Road</dt><dd className="text-ink-2">{camera.roadway}</dd></>)}
            {camera.direction && (<><dt className="text-ink-muted">Direction</dt><dd className="text-ink-2">{camera.direction}{camera.heading_deg != null ? " (approx. view)" : ""}</dd></>)}
            {distanceKm != null && (<><dt className="text-ink-muted">Distance</dt><dd className="text-ink-2">{distanceKm.toFixed(1)} km from {incidentTitle ?? "the incident"}</dd></>)}
            <dt className="text-ink-muted">Feed</dt><dd className="text-ink-2">{camera.video_url ? "Live stream (falls back to still)" : "Still image"}</dd>
          </dl>
          <SourceCredit credit={feed} fallbackName={feed?.name} updated={feed ? `camera list ${fetchedLabel(feed.fetched_at) ?? "—"}` : null} />
          <div className="border border-dashed border-line rounded-md p-2.5 text-xs text-ink-muted space-y-1">
            <p className="font-medium text-ink-2">Camera signals · future</p>
            <p>Object-class counts from camera stills (vehicle, truck, person, smoke) are not built. Blocked on
              server-26#199 (NYSDOT written answer on imagery analytics) and #200 (CISO ruling on retention).
              No plate or face recognition will ever be part of it.</p>
          </div>
          <div className="flex gap-2 flex-wrap">
            <button type="button" onClick={onTogglePin} className="text-xs rounded px-3 py-1.5 bg-accent text-white">{pinned ? "Unpin from wall" : "Pin to wall"}</button>
            <button type="button" onClick={onClose} className="text-xs border border-line rounded px-3 py-1.5 hover:bg-raised">Back</button>
          </div>
        </div>
      </div>
    </div>
  );
}