import type { CanvasAgentViewportLike } from "@/lib/canvas/agent-view-operations";

export function normalizeCanvasAgentViewAnimationDuration(
  durationMs?: unknown,
  fallbackMs = 280
) {
  const duration = Number(durationMs);
  const fallback = Number(fallbackMs);
  const normalizedFallback = Number.isFinite(fallback)
    ? Math.max(0, Math.min(900, fallback))
    : 280;
  if (!Number.isFinite(duration)) return normalizedFallback;
  return Math.max(0, Math.min(900, Math.round(duration)));
}

export function easeOutCanvasAgentViewProgress(progress: number) {
  const clamped = Math.max(0, Math.min(1, Number(progress) || 0));
  return 1 - (1 - clamped) ** 3;
}

export function interpolateCanvasAgentViewport(
  from: CanvasAgentViewportLike,
  to: CanvasAgentViewportLike,
  progress: number
): CanvasAgentViewportLike {
  const easedProgress = easeOutCanvasAgentViewProgress(progress);
  const interpolate = (start: number, end: number) =>
    start + (end - start) * easedProgress;

  return {
    x: interpolate(Number(from.x || 0), Number(to.x || 0)),
    y: interpolate(Number(from.y || 0), Number(to.y || 0)),
    zoom: interpolate(Number(from.zoom || 1), Number(to.zoom || 1)),
  };
}