/**
 * Copyright (c) 2026 The xterm.js authors. All rights reserved.
 * @license MIT
 */

// @ts-check
import { writeFileSync } from 'fs';
import { fileURLToPath } from 'url';
import { dirname, join } from 'path';

const __dirname = dirname(fileURLToPath(import.meta.url));
const root = join(__dirname, '..');

// Import compiled transition table
const { VT500_TRANSITION_TABLE } = await import(join(root, 'out/common/parser/EscapeSequenceParser.js'));

const table = VT500_TRANSITION_TABLE.table;
let out = '/* Auto-generated by bin/gen_parser_transition_table.mjs - do not edit */\n';
out += `#ifndef PARSER_TRANSITION_TABLE_H\n#define PARSER_TRANSITION_TABLE_H\n\n`;
out += `#include <stdint.h>\n\n`;
out += `#define PARSER_TABLE_SIZE ${table.length}\n\n`;
out += `static const uint16_t PARSER_TRANSITION_TABLE[PARSER_TABLE_SIZE] = {\n`;
for (let i = 0; i < table.length; i++) {
  if (i % 16 === 0) out += '  ';
  out += `0x${table[i].toString(16)}`;
  out += i < table.length - 1 ? ', ' : '';
  if (i % 16 === 15) out += '\n';
}
if (table.length % 16 !== 0) out += '\n';
out += `};\n\n#endif\n`;

const headerPath = join(root, 'src/common/parser/wasm/transition_table.h');
writeFileSync(headerPath, out);
console.info(`Wrote ${headerPath} (${table.length} entries)`);