"use client";

import { useCallback, useEffect, useMemo, useRef, useState } from "react";
import { createPortal } from "react-dom";
import { CURRENCIES, type CurrencyItem } from "@/data/currencies";
import { useI18n } from "@/translations/provider";
import { useSheetScrollLock } from "./use-sheet-scroll-lock";

const EXIT_ANIMATION_MS = 200;

export type CurrencySheetProps = {
  isOpen: boolean;
  onClose: () => void;
  selectedCurrency: string;
  onSelectCurrency: (code: string) => void;
  title?: string;
};

export function CurrencySheet({
  isOpen,
  onClose,
  selectedCurrency,
  onSelectCurrency,
  title,
}: CurrencySheetProps) {
  const { dictionary: t, locale } = useI18n();
  const [isClosing, setIsClosing] = useState(false);
  const [searchQuery, setSearchQuery] = useState("");
  const listRef = useRef<HTMLDivElement>(null);
  const sheetRef = useRef<HTMLElement>(null);

  const isRtl = locale === "fa" || locale === "ar" || locale === "ur";
  const defaultTitle = isRtl ? "انتخاب ارز" : "Select Currency";
  const sheetTitle = title || defaultTitle;

  const closeSheet = useCallback(() => {
    setIsClosing(true);
    window.setTimeout(() => {
      onClose();
      setIsClosing(false);
      setSearchQuery("");
    }, EXIT_ANIMATION_MS);
  }, [onClose]);

  useSheetScrollLock(isOpen && !isClosing, { onBack: closeSheet });

  // Escape key handler
  useEffect(() => {
    if (!isOpen) return;
    const handleKeyDown = (e: KeyboardEvent) => {
      if (e.key === "Escape") {
        closeSheet();
      }
    };
    window.addEventListener("keydown", handleKeyDown);
    return () => window.removeEventListener("keydown", handleKeyDown);
  }, [isOpen, closeSheet]);

  const filteredCurrencies = useMemo(() => {
    const q = searchQuery.toLowerCase().trim();
    if (!q) return CURRENCIES;
    return CURRENCIES.filter(
      (c) =>
        c.code.toLowerCase().includes(q) ||
        c.nameEn.toLowerCase().includes(q) ||
        c.nameFa.toLowerCase().includes(q) ||
        (c.symbol && c.symbol.toLowerCase().includes(q)),
    );
  }, [searchQuery]);

  const handleSelect = (code: string) => {
    onSelectCurrency(code);
    closeSheet();
  };

  const searchPlaceholder =
    locale === "fa"
      ? "جستجوی ارز یا کشور..."
      : locale === "ar"
        ? "بحث عن العملة..."
        : "Search currency or country...";

  const noResultsText =
    locale === "fa"
      ? "ارزی یافت نشد"
      : locale === "ar"
        ? "لم يتم العثور على عملات"
        : "No currencies found";

  if (!isOpen && !isClosing) return null;

  return createPortal(
    <div
      className={[
        "fixed inset-0 z-50 flex items-end justify-center",
        isClosing ? "flutter-scrim-exit" : "flutter-scrim",
      ].join(" ")}
      role="dialog"
      aria-label={sheetTitle}
      onKeyDown={(e) => {
        if (e.key === "Escape") closeSheet();
      }}
      onClick={(event) => {
        if (event.target === event.currentTarget) closeSheet();
      }}
    >
      <section
        ref={sheetRef}
        className={[
          "flex w-full flex-col overflow-hidden rounded-t-[22px] bg-white pb-[env(safe-area-inset-bottom)] shadow-[0_-10px_32px_rgba(0,0,0,0.16)] sm:max-w-[420px] h-[82svh] min-h-[82svh] max-h-[82svh]",
          isClosing ? "flutter-sheet-surface-exit" : "flutter-sheet-surface",
        ].join(" ")}
      >
        {/* Header */}
        <div className="flex items-center justify-between px-5 pt-3 pb-3 border-b border-[#F2F4F7]">
          <h3 className="text-[17px] font-bold text-[#181818] truncate pr-2">
            {sheetTitle}
          </h3>
          <button
            type="button"
            onClick={closeSheet}
            className="flex size-8 shrink-0 items-center justify-center rounded-full text-[#667085] hover:bg-[#F2F4F7] hover:text-[#181818] transition-colors cursor-pointer"
            aria-label="Close"
          >
            <svg
              aria-hidden="true"
              width="18"
              height="18"
              viewBox="0 0 24 24"
              fill="none"
              stroke="currentColor"
              strokeWidth="2.2"
              strokeLinecap="round"
              strokeLinejoin="round"
            >
              <line x1="18" y1="6" x2="6" y2="18" />
              <line x1="6" y1="6" x2="18" y2="18" />
            </svg>
          </button>
        </div>

        {/* Search Bar */}
        <div className="px-5 pt-3.5 pb-2">
          <div className="flex h-[46px] w-full items-center gap-2.5 rounded-[14px] bg-[#F2F4F7] px-3.5 transition-colors focus-within:bg-[#EAECF0]">
            <svg
              aria-hidden="true"
              width="18"
              height="18"
              viewBox="0 0 18 18"
              fill="none"
              className="shrink-0 text-[#667085]"
            >
              <path
                d="M8.25 14.25C11.5637 14.25 14.25 11.5637 14.25 8.25C14.25 4.93629 11.5637 2.25 8.25 2.25C4.93629 2.25 2.25 4.93629 2.25 8.25C2.25 11.5637 4.93629 14.25 8.25 14.25Z"
                stroke="#667085"
                strokeWidth="1.75"
                strokeLinecap="round"
                strokeLinejoin="round"
              />
              <path
                d="M15.75 15.75L12.5 12.5"
                stroke="#667085"
                strokeWidth="1.75"
                strokeLinecap="round"
                strokeLinejoin="round"
              />
            </svg>
            <input
              type="text"
              name="currency_sheet_search"
              autoComplete="off"
              autoCorrect="off"
              autoCapitalize="none"
              spellCheck="false"
              value={searchQuery}
              onChange={(e) => setSearchQuery(e.target.value)}
              placeholder={searchPlaceholder}
              className="flex-1 bg-transparent text-[14px] font-medium text-[#181818] outline-none placeholder:text-[#98A2B3]"
            />
            {searchQuery ? (
              <button
                type="button"
                onClick={() => setSearchQuery("")}
                className="text-[#667085] hover:text-[#181818] text-xs font-semibold p-1 cursor-pointer"
              >
                ✕
              </button>
            ) : null}
          </div>
        </div>

        {/* Currencies List */}
        <div
          ref={listRef}
          onTouchStart={(event) => event.stopPropagation()}
          onTouchMove={(event) => event.stopPropagation()}
          onTouchEnd={(event) => event.stopPropagation()}
          className="flex min-h-0 flex-1 flex-col gap-2 overflow-y-auto overscroll-contain px-5 py-3"
        >
          {filteredCurrencies.length > 0 ? (
            filteredCurrencies.map((item: CurrencyItem) => {
              const isSelected = item.code === selectedCurrency;
              const displayName =
                locale === "fa" || locale === "fa-ir"
                  ? item.nameFa
                  : item.nameEn;

              return (
                <button
                  key={item.code}
                  type="button"
                  onClick={() => handleSelect(item.code)}
                  className={[
                    "flex min-h-[52px] w-full items-center justify-between gap-3 rounded-[14px] border px-3.5 py-2.5 text-start transition-all cursor-pointer",
                    isSelected
                      ? "bg-[#FFF4F5] border-[#F0445B]/40 text-[#181818] shadow-xs"
                      : "bg-white hover:bg-[#F8F9FA] border-[#EAECF0] text-[#181818]",
                  ].join(" ")}
                >
                  <div className="flex items-center gap-3 min-w-0">
                    {/* Radio selection circle */}
                    <div
                      className={[
                        "size-[22px] shrink-0 rounded-full transition-all duration-150 flex items-center justify-center",
                        isSelected
                          ? "border-[6px] border-[#F0445B] bg-white"
                          : "border-[2px] border-[#98A2B3] bg-white",
                      ].join(" ")}
                    />

                    {/* Currency name */}
                    <span
                      className={[
                        "text-[15px] leading-tight truncate min-w-0",
                        isSelected
                          ? "font-bold text-[#181818]"
                          : "font-medium text-[#344054]",
                      ].join(" ")}
                    >
                      {displayName}
                    </span>
                  </div>

                  {/* Currency code badge */}
                  <span
                    className={[
                      "shrink-0 px-2.5 py-1 rounded-[8px] text-[13px] font-bold tracking-wider uppercase font-mono",
                      isSelected
                        ? "bg-[#F0445B] text-white"
                        : "bg-[#F2F4F7] text-[#475467]",
                    ].join(" ")}
                  >
                    {item.code}
                  </span>
                </button>
              );
            })
          ) : (
            <div className="py-12 text-center text-[14px] text-[#667085]">
              {noResultsText}
            </div>
          )}
        </div>
      </section>
    </div>,
    document.body,
  );
}

export default CurrencySheet;