"use client";

import moment from "moment-jalaali";

moment.loadPersian({ dialect: "persian-modern", usePersianDigits: false });

const WEEKDAYS = ["شنبه", "۱ شنبه", "۲ شنبه", "۳ شنبه", "۴ شنبه", "۵ شنبه", "جمعه"];
const MONTHS = [
  "فروردین",
  "اردیبهشت",
  "خرداد",
  "تیر",
  "مرداد",
  "شهریور",
  "مهر",
  "آبان",
  "آذر",
  "دی",
  "بهمن",
  "اسفند",
];

function buildDays(displayDate) {
  const year = displayDate.jYear();
  const month = displayDate.jMonth();
  const daysInMonth = moment.jDaysInMonth(year, month);
  const firstDayOfMonth = moment(`${year}/${month + 1}/1`, "jYYYY/jM/jD").day();
  const startOffset = (firstDayOfMonth + 1) % 7;

  const days = [];
  for (let i = 0; i < startOffset; i++) days.push(null);
  for (let day = 1; day <= daysInMonth; day++) days.push(day);
  return days;
}

function InlineJalaliMonth({
  displayDate,
  selectedDate,
  onSelectDay,
  isDisabled,
  onPrev,
  onNext,
  showPrev = true,
  showNext = true,
}) {
  const days = buildDays(displayDate);

  return (
    <div className="w-full">
      <div className="flex items-center justify-between mb-[16px] px-1">
        <button
          type="button"
          onClick={onNext}
          className={`p-1 text-[#525252] ${showNext ? "" : "invisible"}`}
          aria-label="ماه بعد"
        >
          ‹
        </button>
        <p className="text-[#3B3B3B] text-[14px] md:text-[16px] font-bold">
          {MONTHS[displayDate.jMonth()]} {displayDate.jYear()}
        </p>
        <button
          type="button"
          onClick={onPrev}
          className={`p-1 text-[#525252] ${showPrev ? "" : "invisible"}`}
          aria-label="ماه قبل"
        >
          ›
        </button>
      </div>

      <div className="grid grid-cols-7 gap-y-[12px] mb-[8px]">
        {WEEKDAYS.map((label, idx) => (
          <span
            key={idx}
            className="text-center text-[#9B9B9B] text-[11px] md:text-[12px] font-normal"
          >
            {label}
          </span>
        ))}
      </div>

      <div className="grid grid-cols-7 gap-y-[12px]">
        {days.map((day, index) => {
          if (!day) return <span key={index} />;

          const dayDate = moment(displayDate).jDate(day);
          const isFriday = dayDate.day() === 5;
          const disabled = isDisabled(dayDate);
          const selected =
            selectedDate &&
            dayDate.jYear() === selectedDate.jYear() &&
            dayDate.jMonth() === selectedDate.jMonth() &&
            dayDate.jDate() === selectedDate.jDate();

          return (
            <button
              type="button"
              key={index}
              disabled={disabled}
              onClick={() => onSelectDay(dayDate)}
              className={`
                mx-auto flex items-center justify-center w-[34px] h-[34px] rounded-full
                text-[14px] md:text-[16px] font-normal transition-colors
                ${selected ? "!bg-[#F17732] !text-[#FFF]" : ""}
                ${disabled ? "text-[#D7D7D7] cursor-not-allowed" : isFriday ? "text-[#E0383B]" : "text-[#525252] hover:bg-[#F5F5F5]"}
              `}
            >
              {day}
            </button>
          );
        })}
      </div>
    </div>
  );
}

export default InlineJalaliMonth;