import "server-only";
import { readFileSync, statSync } from "node:fs";
import { join } from "node:path";
import { getOgImagePath, PROJECT_VIDEO_IDS } from "./project-showcase";

const brandMark = `data:image/png;base64,${readFileSync(
  join(process.cwd(), "public/brand/mark-dark.png"),
).toString("base64")}`;

export const OG_SIZE = { width: 1200, height: 630 } as const;
export const OG_CONTENT_TYPE = "image/png";
export const OG_PHOTO_CONTENT_TYPE = "image/jpeg";

/** Teto de uma imagem de compartilhamento: quem recebe o link baixa a imagem a cada prévia, então ela precisa ser leve. */
export const OG_IMAGE_MAX_BYTES = 150_000;

/**
 * Capa 1200x630 gravada da página do projeto (public/videos/<id>/og.jpg), usada como está na imagem de compartilhamento.
 * `undefined` se não existir ou se pesar o teto ou mais: nesse caso quem chama gera o cartão simples, sem imagem de fundo.
 */
export function readProjectOgImage(id: string): Buffer | undefined {
  if (!PROJECT_VIDEO_IDS.includes(id)) return undefined;
  const path = join(process.cwd(), "public", getOgImagePath(id));
  try {
    if (statSync(path).size >= OG_IMAGE_MAX_BYTES) return undefined;
    return readFileSync(path);
  } catch {
    return undefined;
  }
}

export function OgCard({
  eyebrow,
  title,
  description,
  backgroundImage,
}: {
  eyebrow: string;
  title: string;
  description: string;
  /** Imagem de fundo (data URI), escurecida da esquerda para a direita para o texto continuar legível. */
  backgroundImage?: string;
}) {
  return (
    <div
      style={{
        width: "100%",
        height: "100%",
        display: "flex",
        position: "relative",
        flexDirection: "column",
        justifyContent: "space-between",
        background: "#050505",
        color: "#f4f1e8",
        padding: 72,
        fontFamily: "Arial, sans-serif",
      }}
    >
      {backgroundImage && (
        <>
          {/* biome-ignore lint/performance/noImgElement: o ImageResponse (satori) só desenha <img> */}
          <img
            src={backgroundImage}
            alt=""
            width={OG_SIZE.width}
            height={OG_SIZE.height}
            style={{ position: "absolute", top: 0, left: 0 }}
          />
          <div
            style={{
              position: "absolute",
              top: 0,
              left: 0,
              width: OG_SIZE.width,
              height: OG_SIZE.height,
              display: "flex",
              background:
                "linear-gradient(90deg, rgba(5,5,5,0.97) 0%, rgba(5,5,5,0.9) 48%, rgba(5,5,5,0.58) 100%)",
            }}
          />
        </>
      )}
      {/* biome-ignore lint/performance/noImgElement: o ImageResponse (satori) só desenha <img> */}
      <img
        src={brandMark}
        alt="Evandro.dev.br"
        width={80}
        height={80}
        style={{ position: "absolute", top: 48, right: 72 }}
      />
      <div
        style={{
          display: "flex",
          paddingRight: 112,
          color: "#ccff00",
          fontSize: 24,
          letterSpacing: "0.16em",
          textTransform: "uppercase",
        }}
      >
        {eyebrow}
      </div>
      <div style={{ display: "flex", flexDirection: "column", gap: 28 }}>
        <div
          style={{
            display: "flex",
            fontSize: 64,
            fontWeight: 700,
            lineHeight: 1.08,
          }}
        >
          {title}
        </div>
        <div
          style={{
            display: "flex",
            maxWidth: 980,
            color: "#c7c3ba",
            fontSize: 28,
            lineHeight: 1.35,
          }}
        >
          {description}
        </div>
      </div>
      <div
        style={{
          display: "flex",
          borderTop: "1px solid #343434",
          paddingTop: 24,
          fontSize: 20,
          letterSpacing: "0.12em",
        }}
      >
        EVANDRO.DEV.BR / ENGENHARIA DE SOFTWARE
      </div>
    </div>
  );
}