package com.android.dialer.helpdesk.util;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;

/**
 * Standalone off-device test for {@link BusinessHours}. Two modes:
 *  - default: assertion suite (boundaries + known holidays).
 *  - "xcheck": read {@code yyyy-MM-ddTHH:mm} lines from stdin, print "open"/"closed" — the harness
 *    diffs this against the real backend Helpdesk::BusinessHours over a full-year sweep.
 */
public class BusinessHoursTest {
  static int pass = 0, fail = 0;
  static void t(boolean got, boolean want, String d) {
    if (got == want) { pass++; System.out.println("  ok  " + d); }
    else { fail++; System.out.println("  FAIL " + d + "  (got: " + got + ")"); }
  }

  /** Parse yyyy-MM-ddTHH:mm into {year, month, day, hour}. */
  static int[] parse(String s) {
    int y = Integer.parseInt(s.substring(0, 4));
    int mo = Integer.parseInt(s.substring(5, 7));
    int d = Integer.parseInt(s.substring(8, 10));
    int h = Integer.parseInt(s.substring(11, 13));
    return new int[] {y, mo, d, h};
  }
  static boolean open(String s) { int[] p = parse(s); return BusinessHours.isOpen(p[0], p[1], p[2], p[3]); }

  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) {
        if (line.isEmpty()) continue;
        System.out.println(open(line) ? "open" : "closed");
      }
      return;
    }
    // 2026-07-08 is a Wednesday (normal working day)
    t(open("2026-07-08T10:00"), true, "Wed 10:00 open");
    t(open("2026-07-08T07:59"), false, "07:59 closed (before open)");
    t(open("2026-07-08T08:00"), true, "08:00 open (inclusive)");
    t(open("2026-07-08T15:59"), true, "15:59 open");
    t(open("2026-07-08T16:00"), false, "16:00 closed (exclusive)");
    t(open("2026-07-11T10:00"), false, "Saturday closed");
    t(open("2026-07-12T10:00"), false, "Sunday closed");
    t(open("2026-07-06T10:00"), false, "Jul 6 (Jan Hus) holiday closed");
    t(open("2026-01-01T10:00"), false, "New Year holiday closed");
    t(open("2026-12-25T10:00"), false, "Christmas holiday closed");
    // Easter 2026 = Apr 5 -> Good Friday Apr 3, Easter Monday Apr 6
    t(Arrays.equals(BusinessHours.easter(2026), new int[] {4, 5}), true, "Easter 2026 = Apr 5");
    t(open("2026-04-03T10:00"), false, "Good Friday closed");
    t(open("2026-04-06T10:00"), false, "Easter Monday closed");
    // boundary: Easter early enough that Good Friday is in March (2027 Easter = Mar 28 -> GF Mar 26)
    t(Arrays.equals(BusinessHours.easter(2027), new int[] {3, 28}), true, "Easter 2027 = Mar 28 (month rollover check)");
    System.out.println("\n" + pass + " passed, " + fail + " failed");
    System.exit(fail == 0 ? 0 : 1);
  }
}