package com.android.dialer.helpdesk.util;

import java.io.BufferedReader;
import java.io.InputStreamReader;

/**
 * Standalone off-device test for {@link CzE164}. Two modes:
 *  - default: assertion suite.
 *  - "xcheck": read raw numbers from stdin, print normalized output per line — used by the harness
 *    to diff against the real backend Helpdesk::Phone.e164.
 */
public class CzE164Test {
  static int pass = 0, fail = 0;
  static void eq(String got, String want, String d) {
    if (got == null ? want == null : got.equals(want)) { pass++; System.out.println("  ok  " + d); }
    else { fail++; System.out.println("  FAIL " + d + "  (got: " + got + ", want: " + want + ")"); }
  }

  public static void main(String[] args) throws Exception {
    if (args.length > 0 && args[0].equals("xcheck")) {
      BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
      String line;
      while ((line = r.readLine()) != null) {
        String out = CzE164.normalize(line);
        System.out.println(out == null ? "<nil>" : out);
      }
      return;
    }
    eq(CzE164.normalize("601 234 567"), "+420601234567", "bare CZ national -> +420");
    eq(CzE164.normalize("00420601234567"), "+420601234567", "00420 -> +420");
    eq(CzE164.normalize("+420601234567"), "+420601234567", "already E.164 passthrough");
    eq(CzE164.normalize("+420 601-234-567"), "+420601234567", "strips spaces/dashes");
    eq(CzE164.normalize("(602) 000 000"), "+420602000000", "strips parens");
    eq(CzE164.normalize("hidden"), null, "non-numeric -> nil");
    eq(CzE164.normalize(""), null, "empty -> nil");
    eq(CzE164.normalize(null), null, "null -> nil");
    eq(CzE164.normalize("12345"), null, "too short -> nil");
    eq(CzE164.normalize("+441632960000"), "+441632960000", "foreign E.164 passthrough");
    System.out.println("\n" + pass + " passed, " + fail + " failed");
    System.exit(fail == 0 ? 0 : 1);
  }
}