// app/ThemeRegistry.tsx
"use client";
import createCache from "@emotion/cache";
import { prefixer } from "stylis";
import rtlPlugin from "stylis-plugin-rtl";
import { useServerInsertedHTML } from "next/navigation";
import { CacheProvider, ThemeProvider } from "@emotion/react";
import React from "react";
import theme from "../theme/theme";

// This implementation is from emotion-js
// https://github.com/emotion-js/emotion/issues/2928#issuecomment-1319747902
export default function ThemeRegistry({ children }) {
  const options = {
    key: "muirtl",
    stylisPlugins: [prefixer, rtlPlugin],
  };
  const [{ cache, flush }] = React.useState(() => {
    const cache = createCache(options);
    cache.compat = true;
    const prevInsert = cache.insert;
    let inserted = [];
    cache.insert = (...args) => {
      const serialized = args[1];
      if (cache.inserted[serialized.name] === undefined) {
        inserted.push(serialized.name);
      }
      return prevInsert(...args);
    };
    const flush = () => {
      const prevInserted = inserted;
      inserted = [];
      return prevInserted;
    };
    return { cache, flush };
  });

  useServerInsertedHTML(() => {
    const names = flush();
    if (names.length === 0) {
      return null;
    }
    let styles = "";
    for (const name of names) {
      styles += cache.inserted[name];
    }
    return (
      <style
        key={cache.key}
        data-emotion={`${cache.key} ${names.join(" ")}`}
        dangerouslySetInnerHTML={{
          __html: styles,
        }}
      />
    );
  });

  return (
    <CacheProvider value={cache}>
      <ThemeProvider theme={theme}>{children}</ThemeProvider>
    </CacheProvider>
  );
}