"use client";

import { useEffect, useRef, useState } from "react";
import { useCart } from "./CartProvider";
import { getContinueUrl } from "@/lib/cart";
import { formatToman } from "@/lib/format";
import { BagIcon, CloseIcon, MinusIcon, PlusIcon, TrashIcon } from "./icons";

export default function MiniCart() {
  const { items, count, total, updateQuantity, removeItem } = useCart();
  const [open, setOpen] = useState(false);
  const rootRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    if (!open) return;
    function onClickAway(e: MouseEvent) {
      if (rootRef.current && !rootRef.current.contains(e.target as Node)) {
        setOpen(false);
      }
    }
    document.addEventListener("mousedown", onClickAway);
    return () => document.removeEventListener("mousedown", onClickAway);
  }, [open]);

  return (
    <div className="relative" ref={rootRef}>
      <button
        type="button"
        onClick={() => setOpen((v) => !v)}
        className="relative flex items-center justify-center size-10 md:size-11 rounded-lg border border-line text-ink hover:border-brand hover:text-brand transition-colors"
        aria-label="سبد خرید"
      >
        <BagIcon className="size-5" />
        {count > 0 && (
          <span className="absolute -top-1.5 -end-1.5 flex items-center justify-center size-4.5 rounded-full bg-gold text-[10px] font-bold text-ink">
            {count > 99 ? "99+" : count}
          </span>
        )}
      </button>

      {open && (
        <div className="absolute end-0 top-full mt-2 w-80 sm:w-96 bg-white border border-line rounded-xl shadow-xl z-50 flex flex-col max-h-[70vh]">
          <div className="flex items-center justify-between px-4 h-12 border-b border-line shrink-0">
            <h3 className="text-sm font-bold text-ink">سبد خرید</h3>
            <button
              type="button"
              onClick={() => setOpen(false)}
              aria-label="بستن"
              className="p-1 text-body hover:text-ink"
            >
              <CloseIcon className="size-4" />
            </button>
          </div>

          {items.length === 0 ? (
            <div className="px-4 py-8 text-center text-sm text-body">سبد خرید شما خالی است</div>
          ) : (
            <div className="flex-1 overflow-y-auto divide-y divide-line">
              {items.map((line) => (
                <div key={line.id} className="flex gap-3 px-4 py-3">
                  <img
                    src={line.image}
                    alt={line.name}
                    className="size-16 shrink-0 rounded-lg object-cover border border-line"
                  />
                  <div className="flex-1 min-w-0 flex flex-col">
                    <p className="text-[13px] text-ink text-right line-clamp-2">{line.name}</p>
                    <div className="mt-auto flex items-center justify-between gap-2">
                      <div className="flex items-center gap-1.5 rounded-full border border-line px-1 h-7">
                        <button
                          type="button"
                          onClick={() => updateQuantity(line.id, line.quantity + 1)}
                          aria-label="افزایش تعداد"
                          className="flex items-center justify-center size-5 text-body hover:text-brand"
                        >
                          <PlusIcon className="size-3.5" />
                        </button>
                        <span className="w-5 text-center text-xs font-bold text-ink">
                          {line.quantity}
                        </span>
                        <button
                          type="button"
                          onClick={() => updateQuantity(line.id, line.quantity - 1)}
                          aria-label="کاهش تعداد"
                          className="flex items-center justify-center size-5 text-body hover:text-brand"
                        >
                          <MinusIcon className="size-3.5" />
                        </button>
                      </div>
                      <span className="text-xs font-bold text-brand whitespace-nowrap">
                        {formatToman(line.price * line.quantity)}
                      </span>
                    </div>
                  </div>
                  <button
                    type="button"
                    onClick={() => removeItem(line.id)}
                    aria-label="حذف از سبد خرید"
                    className="self-start p-1 text-body hover:text-red-600"
                  >
                    <TrashIcon className="size-4" />
                  </button>
                </div>
              ))}
            </div>
          )}

          {items.length > 0 && (
            <div className="px-4 py-3 border-t border-line shrink-0">
              <div className="flex items-center justify-between mb-3">
                <span className="text-sm text-body">جمع کل</span>
                <span className="text-sm font-bold text-ink">{formatToman(total)}</span>
              </div>
              <a
                href={getContinueUrl(items)}
                className="flex items-center justify-center w-full rounded-full bg-brand text-white text-sm font-bold h-11 hover:bg-brand-dark transition-colors"
              >
                ادامه فرآیند خرید
              </a>
            </div>
          )}
        </div>
      )}
    </div>
  );
}