import React, { useState, useRef, useEffect } from "react";

interface Stock {
  store: string;
  storeName: string;
  quantity: number;
  work: boolean;
  blocked: string;
  breakdown: number;
  transfer: number;
  allowDelivery: number;
}

interface FilialSelectorProps {
  stocks: Stock[];
  value?: string;
  onValueChange?: (value: string) => void;
  placeholder?: string;
  label?: string;
  className?: string;
}

const FilialSelector: React.FC<FilialSelectorProps> = ({
  stocks,
  value,
  onValueChange,
  placeholder = "Selecione a filial retira",
  label = "Filial Retira",
  className,
}) => {
  const [isOpen, setIsOpen] = useState(false);
  const [searchTerm, setSearchTerm] = useState("");
  const [selectedStore, setSelectedStore] = useState<string>(value || "");
  const [displayValue, setDisplayValue] = useState<string>("");
  const containerRef = useRef<HTMLDivElement>(null);
  const inputRef = useRef<HTMLInputElement>(null);
  const tableRef = useRef<HTMLDivElement>(null);

  // Atualizar selectedStore e displayValue quando value mudar externamente
  useEffect(() => {
    if (value !== undefined) {
      setSelectedStore(value);
      const selected = stocks.find((s) => s.store === value);
      if (selected) {
        setDisplayValue(selected.storeName);
        setSearchTerm(selected.storeName);
      } else {
        setDisplayValue("");
        setSearchTerm("");
      }
    }
  }, [value, stocks]);

  // Fechar dropdown ao clicar fora
  useEffect(() => {
    const handleClickOutside = (event: MouseEvent) => {
      if (
        containerRef.current &&
        !containerRef.current.contains(event.target as Node)
      ) {
        setIsOpen(false);
        // Restaurar displayValue quando fechar sem selecionar
        if (selectedStore) {
          const selected = stocks.find((s) => s.store === selectedStore);
          if (selected) {
            setSearchTerm(selected.storeName);
            setDisplayValue(selected.storeName);
          }
        } else {
          setSearchTerm("");
          setDisplayValue("");
        }
      }
    };

    if (isOpen) {
      document.addEventListener("mousedown", handleClickOutside);
      return () => {
        document.removeEventListener("mousedown", handleClickOutside);
      };
    }
  }, [isOpen, selectedStore, stocks]);

  // Filtrar estoques baseado no termo de busca (busca em store e storeName)
  const filteredStocks = stocks.filter((stock) => {
    if (!searchTerm) return true;
    const search = searchTerm.toLowerCase();
    return (
      stock.store.toLowerCase().includes(search) ||
      stock.storeName.toLowerCase().includes(search)
    );
  });

  const handleSelect = (store: string) => {
    setSelectedStore(store);
    const stock = stocks.find((s) => s.store === store);
    if (stock) {
      setDisplayValue(stock.storeName);
      setSearchTerm(stock.storeName);
    }
    onValueChange?.(store);
    setIsOpen(false);
  };

  const handleClear = () => {
    setSearchTerm("");
    setDisplayValue("");
    setSelectedStore("");
    onValueChange?.("");
    if (inputRef.current) {
      inputRef.current.focus();
    }
    setIsOpen(true);
  };

  const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
    const newValue = e.target.value;
    setSearchTerm(newValue);
    setDisplayValue(newValue);
    setIsOpen(true);
    // Se limpar o input, limpar também a seleção
    if (!newValue) {
      setSelectedStore("");
      onValueChange?.("");
    }
  };

  const handleInputFocus = () => {
    setIsOpen(true);
    // Quando focar, mostrar o termo de busca atual
    if (selectedStore) {
      const selected = stocks.find((s) => s.store === selectedStore);
      if (selected) {
        setSearchTerm(selected.storeName);
      }
    }
  };

  const handleToggleDropdown = () => {
    setIsOpen(!isOpen);
    if (!isOpen && inputRef.current) {
      inputRef.current.focus();
    }
  };

  const formatNumber = (num: number): string => {
    return num.toLocaleString("pt-BR", {
      minimumFractionDigits: 3,
      maximumFractionDigits: 3,
    });
  };

  return (
    <div className={className}>
      {label && (
        <label className="block text-xs font-bold text-slate-700 uppercase tracking-wide mb-2">
          {label}
        </label>
      )}
      <div ref={containerRef} className="relative">
        {/* Input */}
        <div className="relative">
          <input
            ref={inputRef}
            type="text"
            value={isOpen ? searchTerm : displayValue}
            onChange={handleInputChange}
            onFocus={handleInputFocus}
            placeholder={placeholder}
            className="w-full px-4 py-3 pr-20 border border-slate-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-orange-500/20 focus:border-orange-500 text-sm font-medium"
          />
          {/* Botões de ação */}
          <div className="absolute right-2 top-1/2 -translate-y-1/2 flex items-center gap-1">
            {(searchTerm || displayValue) && (
              <button
                type="button"
                onClick={handleClear}
                className="p-1.5 hover:bg-slate-100 rounded transition-colors"
                title="Limpar"
              >
                <svg
                  className="w-4 h-4 text-slate-500"
                  fill="none"
                  stroke="currentColor"
                  viewBox="0 0 24 24"
                >
                  <path
                    strokeLinecap="round"
                    strokeLinejoin="round"
                    strokeWidth="2"
                    d="M6 18L18 6M6 6l12 12"
                  />
                </svg>
              </button>
            )}
            <button
              type="button"
              onClick={handleToggleDropdown}
              className="p-1.5 hover:bg-slate-100 rounded transition-colors"
              title={isOpen ? "Fechar" : "Abrir"}
            >
              <svg
                className={`w-4 h-4 text-slate-500 transition-transform ${
                  isOpen ? "rotate-180" : ""
                }`}
                fill="none"
                stroke="currentColor"
                viewBox="0 0 24 24"
              >
                <path
                  strokeLinecap="round"
                  strokeLinejoin="round"
                  strokeWidth="2"
                  d="M19 9l-7 7-7-7"
                />
              </svg>
            </button>
          </div>
        </div>

        {/* Dropdown com Tabela */}
        {isOpen && (
          <div
            ref={tableRef}
            className="absolute z-50 w-full mt-1 bg-white border border-slate-300 rounded-lg shadow-xl max-h-[400px] flex flex-col overflow-hidden"
          >
            {/* Tabela */}
            <div className="overflow-y-auto flex-1">
              <table className="w-full">
                <thead className="bg-slate-50 sticky top-0 z-10">
                  <tr>
                    <th className="px-3 py-2 text-left text-[9px] font-black text-slate-400 uppercase tracking-widest border-b border-slate-200" style={{ width: "50px" }}>
                      Loja
                    </th>
                    <th className="px-3 py-2 text-left text-[9px] font-black text-slate-400 uppercase tracking-widest border-b border-slate-200" style={{ width: "200px" }}>
                      Nome da Loja
                    </th>
                    <th className="px-3 py-2 text-center text-[9px] font-black text-slate-400 uppercase tracking-widest border-b border-slate-200" style={{ width: "60px" }}>
                      Entrega
                    </th>
                    <th className="px-3 py-2 text-right text-[9px] font-black text-slate-400 uppercase tracking-widest border-b border-slate-200" style={{ width: "80px" }}>
                      Estoque
                    </th>
                    <th className="px-3 py-2 text-center text-[9px] font-black text-slate-400 uppercase tracking-widest border-b border-slate-200" style={{ width: "60px" }}>
                      Pertence
                    </th>
                    <th className="px-3 py-2 text-right text-[9px] font-black text-slate-400 uppercase tracking-widest border-b border-slate-200" style={{ width: "70px" }}>
                      Bloq
                    </th>
                    <th className="px-3 py-2 text-right text-[9px] font-black text-slate-400 uppercase tracking-widest border-b border-slate-200" style={{ width: "70px" }}>
                      Transf
                    </th>
                  </tr>
                </thead>
                <tbody className="divide-y divide-slate-100">
                  {filteredStocks.length === 0 ? (
                    <tr>
                      <td
                        colSpan={7}
                        className="px-4 py-8 text-center text-sm text-slate-500"
                      >
                        Nenhuma filial encontrada
                      </td>
                    </tr>
                  ) : (
                    filteredStocks.map((stock) => {
                      const isSelected = stock.store === selectedStore;
                      return (
                        <tr
                          key={stock.store}
                          onClick={() => handleSelect(stock.store)}
                          className={`cursor-pointer transition-colors ${
                            isSelected
                              ? "bg-blue-50 hover:bg-blue-100"
                              : "hover:bg-slate-50"
                          }`}
                        >
                          <td className="px-3 py-2 text-xs text-slate-700 font-medium">
                            {stock.store}
                          </td>
                          <td className="px-3 py-2 text-xs text-slate-700 font-medium">
                            {stock.storeName}
                          </td>
                          <td className="px-3 py-2 text-center">
                            <input
                              type="checkbox"
                              checked={stock.allowDelivery === 1}
                              readOnly
                              className="w-4 h-4 text-orange-500 border-slate-300 rounded focus:ring-orange-500 focus:ring-2 cursor-default pointer-events-none"
                            />
                          </td>
                          <td className="px-3 py-2 text-xs text-slate-700 text-right font-medium">
                            {formatNumber(stock.quantity)}
                          </td>
                          <td className="px-3 py-2 text-center">
                            <input
                              type="checkbox"
                              checked={stock.work}
                              readOnly
                              className="w-4 h-4 text-orange-500 border-slate-300 rounded focus:ring-orange-500 focus:ring-2 cursor-default pointer-events-none"
                            />
                          </td>
                          <td className="px-3 py-2 text-xs text-slate-700 text-right font-medium">
                            {stock.blocked || "0"}
                          </td>
                          <td className="px-3 py-2 text-xs text-slate-700 text-right font-medium">
                            {stock.transfer || 0}
                          </td>
                        </tr>
                      );
                    })
                  )}
                </tbody>
              </table>
            </div>
          </div>
        )}
      </div>
    </div>
  );
};

export default FilialSelector;