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import { mkdir, rm, writeFile } from "node:fs/promises";
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import path from "node:path";
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import { createRequire } from "node:module";
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import { fileURLToPath } from "node:url";
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import { emojis as tiptapEmojis, type EmojiItem } from "@tiptap/extension-emoji";
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const require = createRequire(import.meta.url);
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interface EmojibaseItem {
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  emoji?: string;
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  group?: number;
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}
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const APPLE_ASSET_PREFIX = "https://cdn.jsdelivr.net/npm/emoji-datasource-apple/img/apple/64/";
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const VARIATION_SELECTOR_RE = /[\uFE0E\uFE0F]/gu;
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const __dirname = path.dirname(fileURLToPath(import.meta.url));
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const sharedGeneratedDir = path.resolve(__dirname, "../src/shared/emoji/generated");
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const clientGeneratedDir = path.resolve(__dirname, "../src/client/lib/emoji/generated");
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function normalizeEmoji(emoji: string): string {
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  return emoji.replace(VARIATION_SELECTOR_RE, "");
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}
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function getAppleAssetName(item: EmojiItem): string | null {
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  if (!item.fallbackImage?.startsWith(APPLE_ASSET_PREFIX)) {
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    return null;
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  }
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  return item.fallbackImage.slice(APPLE_ASSET_PREFIX.length);
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}
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function renderModule(header: string, value: unknown): string {
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  return `${header}${JSON.stringify(value, null, 2)} as const;\n`;
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}
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async function main() {
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  const emojibaseData = require("emojibase-data/en/data.json") as EmojibaseItem[];
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  const emojibaseMessages = require("emojibase-data/en/messages.json") as {
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    groups: Record<string, { message?: string }>;
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  };
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  const iconData: Record<string, string> = {};
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  const groupOverrides: Record<string, string> = {};
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  const baseEmojiMap = new Map<string, EmojiItem>();
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  for (const item of tiptapEmojis) {
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    if (!item.emoji) continue;
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    const normalizedEmoji = normalizeEmoji(item.emoji);
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    baseEmojiMap.set(normalizedEmoji, item);
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    const asset = getAppleAssetName(item);
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    if (asset) {
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      iconData[normalizedEmoji] = asset;
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    }
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  }
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  for (const emojibaseItem of emojibaseData) {
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    if (!emojibaseItem.emoji) {
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      continue;
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    }
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    const baseEmoji = normalizeEmoji(emojibaseItem.emoji);
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    const baseItem = baseEmojiMap.get(baseEmoji);
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    if (!baseItem) continue;
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    const groupMessage =
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      typeof emojibaseItem.group === "number"
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        ? (emojibaseMessages.groups[String(emojibaseItem.group)]?.message ?? "")
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        : "";
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    if (!baseItem.group && groupMessage) {
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      groupOverrides[baseEmoji] = groupMessage;
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    }
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  }
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  await mkdir(sharedGeneratedDir, { recursive: true });
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  await mkdir(clientGeneratedDir, { recursive: true });
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  await writeFile(
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    path.join(sharedGeneratedDir, "emoji-icon-data.ts"),
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    renderModule(
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      `// This file is generated by scripts/generate-emoji-data.ts\n\nexport const EMOJI_ICON_DATA = `,
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      iconData,
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    ),
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  );
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  await writeFile(
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    path.join(clientGeneratedDir, "emoji-group-overrides.ts"),
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    renderModule(
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      `// This file is generated by scripts/generate-emoji-data.ts\n\nexport const EMOJI_GROUP_OVERRIDES = `,
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      groupOverrides,
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    ),
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  );
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  // Older versions of this script wrote both maps under the client directory.
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  // Clean up the stale icon-data file if a previous checkout still has it so
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  // it does not shadow the shared module via tsconfig path resolution.
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  await rm(path.join(clientGeneratedDir, "emoji-icon-data.ts"), { force: true });
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  await rm(path.join(clientGeneratedDir, "emoji-tone-variants.ts"), { force: true });
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}
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await main();