/* This file is generated by scripts/generate-noto-jp-loader.ts. */
import unicodeRanges from "@fontsource-variable/noto-sans-jp/unicode.json";
import font0 from "@fontsource-variable/noto-sans-jp/files/noto-sans-jp-0-wght-normal.woff2";
import font1 from "@fontsource-variable/noto-sans-jp/files/noto-sans-jp-1-wght-normal.woff2";
import font2 from "@fontsource-variable/noto-sans-jp/files/noto-sans-jp-2-wght-normal.woff2";
import font3 from "@fontsource-variable/noto-sans-jp/files/noto-sans-jp-3-wght-normal.woff2";
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import font20 from "@fontsource-variable/noto-sans-jp/files/noto-sans-jp-20-wght-normal.woff2";
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import font22 from "@fontsource-variable/noto-sans-jp/files/noto-sans-jp-22-wght-normal.woff2";
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const fontUrls: Record<string, string> = {
  "[0]": font0,
  "[1]": font1,
  "[2]": font2,
  "[3]": font3,
  "[4]": font4,
  "[5]": font5,
  "[6]": font6,
  "[7]": font7,
  "[8]": font8,
  "[9]": font9,
  "[10]": font10,
  "[11]": font11,
  "[12]": font12,
  "[13]": font13,
  "[14]": font14,
  "[15]": font15,
  "[16]": font16,
  "[17]": font17,
  "[18]": font18,
  "[19]": font19,
  "[20]": font20,
  "[21]": font21,
  "[22]": font22,
  "[23]": font23,
  "[24]": font24,
  "[25]": font25,
  "[26]": font26,
  "[27]": font27,
  "[28]": font28,
  "[29]": font29,
  "[30]": font30,
  "[31]": font31,
  "[32]": font32,
  "[33]": font33,
  "[34]": font34,
  "[35]": font35,
  "[36]": font36,
  "[37]": font37,
  "[38]": font38,
  "[39]": font39,
  "[40]": font40,
  "[41]": font41,
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  "[43]": font43,
  "[44]": font44,
  "[45]": font45,
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  "[55]": font55,
  "[56]": font56,
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  "[60]": font60,
  "[61]": font61,
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  "[64]": font64,
  "[65]": font65,
  "[66]": font66,
  "[67]": font67,
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  "[69]": font69,
  "[70]": font70,
  "[71]": font71,
  "[72]": font72,
  "[73]": font73,
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  "[75]": font75,
  "[76]": font76,
  "[77]": font77,
  "[78]": font78,
  "[79]": font79,
  "[80]": font80,
  "[81]": font81,
  "[82]": font82,
  "[83]": font83,
  "[84]": font84,
  "[85]": font85,
  "[86]": font86,
  "[87]": font87,
  "[88]": font88,
  "[89]": font89,
  "[90]": font90,
  "[91]": font91,
  "[92]": font92,
  "[93]": font93,
  "[94]": font94,
  "[95]": font95,
  "[96]": font96,
  "[97]": font97,
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  "[100]": font100,
  "[101]": font101,
  "[102]": font102,
  "[103]": font103,
  "[104]": font104,
  "[105]": font105,
  "[106]": font106,
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  "[109]": font109,
  "[110]": font110,
  "[111]": font111,
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  "[113]": font113,
  "[114]": font114,
  "[115]": font115,
  "[116]": font116,
  "[117]": font117,
  "[118]": font118,
  "[119]": font119,
};
const loads = new Map<string, Promise<void>>();

export async function loadNotoSansJp(text: string): Promise<void> {
  const required = new Set<string>();
  for (const character of text) {
    const codePoint = character.codePointAt(0);
    if (codePoint === undefined) continue;
    for (const [key, range] of Object.entries(unicodeRanges)) {
      if (!fontUrls[key]) continue;
      if (rangeContains(range, codePoint)) {
        required.add(key);
        break;
      }
    }
  }
  await Promise.all([...required].map(loadShard));
}

function loadShard(key: string): Promise<void> {
  const existing = loads.get(key);
  if (existing) return existing;
  const url = fontUrls[key];
  const unicodeRange = (unicodeRanges as Record<string, string>)[key];
  if (!url || !unicodeRange) throw new Error(`Missing Noto Sans JP shard ${key}`);
  const loading = new FontFace(
    "Noto Sans JP Variable",
    `url("${url}") format("woff2-variations")`,
    { style: "normal", weight: "100 900", unicodeRange },
  )
    .load()
    .then((font) => {
      document.fonts.add(font);
    })
    .catch((error: unknown) => {
      loads.delete(key);
      throw error;
    });
  loads.set(key, loading);
  return loading;
}

function rangeContains(range: string, codePoint: number): boolean {
  for (const token of range.split(",")) {
    const [startText, endText = startText] = token.trim().slice(2).split("-");
    const start = Number.parseInt(startText ?? "", 16);
    const end = Number.parseInt(endText ?? "", 16);
    if (Number.isFinite(start) && codePoint >= start && codePoint <= end) return true;
  }
  return false;
}