/* Server-side mapping from the editable Strapi phase component to page copy. */

import type { CmsLegacyStage } from "./cms-types";
import { list, toImage } from "./cms.server";
import type { LegacyGalleryImage, LegacyStageCopy } from "./copy";

const textOr = (value: string | null | undefined, fallback: string): string =>
  value?.trim() ? value : fallback;

export function resolveLegacyStage(
  source: CmsLegacyStage | null | undefined,
  fallback: LegacyStageCopy,
): LegacyStageCopy {
  const metrics = list(source?.metrics)
    .filter((metric) => metric.value.trim() !== "" && metric.label.trim() !== "")
    .map(({ value, label }) => ({ value, label }));
  const focusAreas = list(source?.focusAreas)
    .map((area) => area.name.trim())
    .filter(Boolean);
  const images: LegacyGalleryImage[] = list(source?.images)
    .slice(0, 5)
    .flatMap((media) => {
      const image = toImage(media, "large");
      return image
        ? [{
            src: image.src,
            alt: image.alt,
            ...(media.caption ? { caption: media.caption } : {}),
          }]
        : [];
    });

  return {
    ...fallback,
    name: textOr(source?.name, fallback.name),
    years: textOr(source?.years, fallback.years),
    summary: textOr(source?.summary, fallback.summary),
    description: textOr(source?.description, fallback.description),
    metrics: metrics.length > 0 ? metrics : fallback.metrics,
    focusHeading: textOr(source?.focusHeading, fallback.focusHeading),
    focusAreas: focusAreas.length > 0 ? focusAreas : fallback.focusAreas,
    imageHeading: textOr(source?.galleryHeading, fallback.imageHeading),
    images,
  };
}