import { ImageResponse } from "next/og";
import { API_URL } from "@/config/constants";
import { resolveFacilityAlias } from "@/app/facilityAliases";
import { buildAbsoluteUrl } from "@/app/seo";

export const size = {
  width: 1200,
  height: 630,
};

export const contentType = "image/png";

type OpenGraphImageProps = {
  params: Promise<{ slug: string }>;
};

type OpenGraphFacility = {
  name: string;
  city?: string | null;
  county?: string | null;
  image_url?: string | null;
};

async function getFacility(slug: string) {
  const res = await fetch(`${API_URL}/facilities/${slug}`, { cache: "no-store" });
  if (!res.ok) {
    return null;
  }

  const facility = (await res.json()) as Partial<OpenGraphFacility> | null;
  if (!facility?.name) {
    return null;
  }

  return facility as OpenGraphFacility;
}

async function getFacilityForSlug(slug: string) {
  const facility = await getFacility(slug);
  if (facility) {
    return facility;
  }

  const canonicalSlug = await resolveFacilityAlias(slug);
  if (!canonicalSlug || canonicalSlug === slug) {
    return null;
  }

  return getFacility(canonicalSlug);
}

export default async function OpenGraphImage({ params }: OpenGraphImageProps) {
  const { slug } = await params;
  const facility = await getFacilityForSlug(slug);

  const title = facility?.name || "TeeOff";
  const location = [facility?.city, facility?.county].filter(Boolean).join(" · ") || "Norske golfbaner";
  const imageUrl = facility?.image_url ? buildAbsoluteUrl(facility.image_url) : null;

  return new ImageResponse(
    (
      <div
        style={{
          display: "flex",
          position: "relative",
          width: "100%",
          height: "100%",
          overflow: "hidden",
          background: "linear-gradient(135deg, #1f2b24 0%, #3b4a3f 100%)",
          color: "white",
        }}
      >
        {imageUrl ? (
          <img
            src={imageUrl}
            alt={title}
            width={1200}
            height={630}
            style={{
              position: "absolute",
              inset: 0,
              width: "100%",
              height: "100%",
              objectFit: "cover",
            }}
          />
        ) : null}
        <div
          style={{
            position: "absolute",
            inset: 0,
            background:
              "linear-gradient(180deg, rgba(17,32,21,0.15) 0%, rgba(17,32,21,0.82) 72%, rgba(17,32,21,0.92) 100%)",
          }}
        />
        <div
          style={{
            position: "relative",
            display: "flex",
            flexDirection: "column",
            justifyContent: "space-between",
            width: "100%",
            height: "100%",
            padding: "52px 58px",
          }}
        >
          <div
            style={{
              display: "flex",
              alignSelf: "flex-start",
              borderRadius: 999,
              background: "rgba(139, 195, 74, 0.92)",
              color: "#112015",
              padding: "12px 22px",
              fontSize: 22,
              fontWeight: 800,
              letterSpacing: "0.18em",
              textTransform: "uppercase",
            }}
          >
            TeeOff
          </div>

          <div style={{ display: "flex", flexDirection: "column", gap: 18, maxWidth: 900 }}>
            <div
              style={{
                display: "flex",
                fontSize: 28,
                fontWeight: 700,
                letterSpacing: "0.08em",
                textTransform: "uppercase",
                color: "#9ecb66",
              }}
            >
              Golfbane
            </div>
            <div
              style={{
                display: "flex",
                fontSize: 66,
                lineHeight: 1.02,
                fontWeight: 900,
                letterSpacing: "-0.04em",
              }}
            >
              {title}
            </div>
            <div
              style={{
                display: "flex",
                fontSize: 30,
                fontWeight: 600,
                color: "rgba(255,255,255,0.88)",
              }}
            >
              {location}
            </div>
          </div>
        </div>
      </div>
    ),
    size,
  );
}