import fs from "node:fs/promises";
import { sync as exists } from "@polymech/fs/exists"
import { posix as path } from "node:path";
import { fsCachePath } from "../../utils/runtimeChecks.js";

let copied = [];
let assetsDirExists;

export async function saveAndCopyAsset(
  hash,
  image,
  buffer,
  outDir,
  assetsDir,
  assetPath,
  isSsrBuild
) {
  const src = fsCachePath + hash;

  const dest = path.join(outDir, isSsrBuild ? "/client" : "", assetPath);
  assetsDir = path.join(outDir, isSsrBuild ? "/client" : "/", assetsDir);
  copied = copied.filter(exists);
  if (copied.includes(assetPath)) return;
  if (!assetsDirExists) {
    await fs.mkdir(assetsDir, {
      recursive: true,
    });

    assetsDirExists = true;
  }

  await fs.copyFile(src, dest).catch(async (error) => {
    if (error.code === "ENOENT") {
      const imageBuffer = buffer || (await image.toBuffer());

      await Promise.all(
        [src, dest].map(async (dir) => {
          await fs.writeFile(dir, imageBuffer);
        })
      );
    } else throw error;
  });

  copied.push(assetPath);
}