#!/bin/env -S deno run -A

const promises = [] as Promise<unknown>[];
const target = Deno.cwd() + "/target";
const in_flight = new Set<string>();

function wait(ms: number): Promise<void> {
  return new Promise((res) => setTimeout(() => res(), ms));
}
async function block_while(l: () => boolean) {
  while (l()) await wait(100);
}

await Deno.mkdir("target", { recursive: true });
await Deno.remove("target", { recursive: true });
await Deno.mkdir("target");
await Deno.mkdir("target/pdf");
await Deno.mkdir("target/png");

for (const set of ["club", "diamond", "heart", "spade"]) {
  for (let i = 1; i <= 14; i += 1) {
    const id = `${set}-${i}`;
    await block_while(() => (in_flight.size >= 8));
    promises.push(
      (async () => {
        const tmp_path = `/tmp/models-${
          Date.now() + Math.floor(Math.random() * 100000)
        }`;
        await Deno.mkdir(tmp_path + "/base", { recursive: true });
        const [html, pdf, png] = [
          `${tmp_path}/base/page.html`,
          `${target}/pdf/${id}.pdf`,
          `${target}/png/${id}.png`,
        ];
        await Deno.writeTextFile(
          html,
          Deno.readTextFileSync("./models/base/card.html").split("\n").map((
            l,
          ) =>
            l.startsWith("    <script> const card = ")
              ? `<script> const card = { "num": ${i}, "suite": '${set}' }; </script>`
              : l
          ).join("\n"),
        );
        const script = `
            cp -r ./models/* "${tmp_path}"
            cd "${tmp_path}/base"
            chromium --headless --disable-gpu --run-all-compositor-stages-before-draw --no-pdf-header-footer --print-to-pdf="${pdf}" "${html}"
        `;
        await Deno.run({ cmd: ["sh", "-c", script] }).status();
        await Deno.run({
          cmd: [
            "convert",
            ["-density", "900"],
            [pdf],
            ["-quality", "100"],
            png,
          ].flat(),
        })
          .status();
        console.log(`[gen.ts] completed '${id}'`);
        in_flight.delete(id);
        await Deno.remove(tmp_path, { recursive: true });
      })(),
    );
    in_flight.add(id);
    console.log(`[gen.ts] launched '${id}'`);
  }
}

await Promise.all(promises);
console.log("[gen.ts] done");
if (in_flight.size > 0) {
  console.log(`[gen.ts] failed '${Array.from(in_flight.keys()).join()}'`);
}