#!/usr/bin/env node
/**
 * Quick manual verification for plate normalization.
 *
 * Usage:  node scripts/verify-plate-normalization.mjs
 *
 * Demonstrates that:
 *   339ه‍77  (ه + U+200D)  ->  339ه77  ->  letter ه -> code 15
 *   339ي77   (Arabic ي)    ->  339ی77  ->  letter ی -> code 16
 */

// ---------- paste the pure function here so no build needed ----------
function normalizePlateText(text) {
  if (!text) return text;
  let result = String(text);
  result = result.normalize("NFKC");
  result = result.replace(/[\u200C\u200D\u200E\u200F\uFEFF]/g, "");
  result = result.replace(/\u064A/g, "\u06CC"); // Arabic ي → Persian ی
  result = result.trim();
  return result;
}

// ---------- the canonical plate-letter → code mapping ----------
const PLATE_LETTER_MAP = {
  الف: 1, ب: 2, پ: 3, ج: 4, د: 5,
  س: 6, ص: 7, ط: 8, ع: 9, ق: 10,
  ل: 11, م: 12, ن: 13, و: 14, ه: 15,
  ی: 16, ک: 17, ژ: 18, ت: 19, ث: 20,
  ز: 21, ش: 22, ف: 23, گ: 24,
};

function extractAndMap(plateString) {
  const normalized = normalizePlateText(plateString);

  // Simple parser: digits | letter | digits  (left+right digits, 1 letter)
  const match = normalized.match(/^(\d+)([^\d]+)(\d+)$/);
  if (!match) return { input: plateString, normalized, error: "no match" };

  const [, leftDigits, letterRaw, rightDigits] = match;
  const letter = normalizePlateText(letterRaw);
  const code = PLATE_LETTER_MAP[letter];

  return {
    input: plateString,
    normalized,
    leftDigits,
    letter,
    rightDigits,
    code,
    ok: code !== undefined,
  };
}

// ---------- test cases ----------
const cases = [
  { desc: "ه + ZWJ (the original bug)", plate: "339ه\u200D77" },
  { desc: "Arabic ي → Persian ی",        plate: "339ي77" },
  { desc: "ه + ZWNJ",                    plate: "339ه\u200C77" },
  { desc: "RTL mark around letter",      plate: "339\u200Fه\u200E77" },
  { desc: "BOM + ZWJ combined",          plate: "\uFEFF339ه\u200D77" },
  { desc: "clean letter (no junk)",       plate: "339ه77" },
  { desc: "full plate: الف",             plate: "11الف22" },
  { desc: "full plate: ی",               plate: "55ی99" },
];

console.log("Plate Normalization Verification\n");
console.log("=".repeat(72));

let allPassed = true;
for (const { desc, plate } of cases) {
  const r = extractAndMap(plate);
  const status = r.ok ? "PASS" : "FAIL";
  if (!r.ok) allPassed = false;

  console.log(`\n[${status}] ${desc}`);
  console.log(`  Input:     ${JSON.stringify(plate)}`);
  console.log(`  Normalized: ${JSON.stringify(r.normalized)}`);
  if (r.letter) {
    console.log(`  Letter:    ${r.letter}  (U+${r.letter.charCodeAt(0).toString(16).toUpperCase().padStart(4, "0")})`);
  }
  console.log(`  Code:      ${r.code ?? "undefined"}`);
}

console.log("\n" + "=".repeat(72));
console.log(allPassed ? "\n  All tests PASSED ✓" : "\n  Some tests FAILED ✗");
process.exit(allPassed ? 0 : 1);