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

interface DropdownOption {
  id: string;
  label: React.ReactNode;
  value: string;
}

interface DropdownProps {
  options: DropdownOption[];
  value?: string;
  onChange: (value: string) => void;
  placeholder?: string;
  label?: string;
  error?: string;
  className?: string;
  disabled?: boolean;
}

const Dropdown: React.FC<DropdownProps> = ({

  options,

  value,

  onChange,

  placeholder = '请选择',

  label,

  error,

  className = '',

  disabled = false

}) => {
  const [isOpen, setIsOpen] = useState(false);
  const dropdownRef = useRef<HTMLDivElement>(null);
  
  const selectedOption = options.find(option => option.value === value);
  
  // ε€„η†η‚Ήε‡»ε€–ιƒ¨ε…³ι—­δΈ‹ζ‹‰θœε•
  useEffect(() => {
    const handleClickOutside = (event: MouseEvent) => {
      if (dropdownRef.current && !dropdownRef.current.contains(event.target as Node)) {
        setIsOpen(false);
      }
    };
    
    document.addEventListener('mousedown', handleClickOutside);
    return () => {
      document.removeEventListener('mousedown', handleClickOutside);
    };
  }, []);
  
  const toggleDropdown = () => {
    if (!disabled) {
      setIsOpen(!isOpen);
    }
  };
  
  const handleOptionSelect = (optionValue: string) => {
    onChange(optionValue);
    setIsOpen(false);
  };

  return (
    <div className={`mb-4 ${className}`}>

      {label && (

        <label className="block text-sm font-medium mb-1 text-gray-700">

          {label}

        </label>

      )}

      

      <div className="relative" ref={dropdownRef}>

        <button

          type="button"

          onClick={toggleDropdown}

          className={`

            ios-input flex items-center justify-between w-full

            ${disabled ? 'opacity-50 cursor-not-allowed' : 'cursor-pointer'}

            ${error ? 'border-red-500' : ''}

          `}

          disabled={disabled}

        >

          <span className={`${!selectedOption ? 'text-gray-400' : ''}`}>

            {selectedOption ? selectedOption.label : placeholder}

          </span>

          <svg 

            xmlns="http://www.w3.org/2000/svg" 

            className={`h-5 w-5 text-gray-400 transition-transform duration-200 ${isOpen ? 'transform rotate-180' : ''}`} 

            viewBox="0 0 20 20" 

            fill="currentColor"

          >

            <path 

              fillRule="evenodd" 

              d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" 

              clipRule="evenodd" 

            />

          </svg>

        </button>

        

        {isOpen && (

          <div className="absolute z-10 mt-1 w-full bg-white rounded-md shadow-lg max-h-60 overflow-auto">

            <div className="py-1">

              {options.map((option) => (

                <div

                  key={option.id}

                  className={`

                    px-4 py-2 text-sm hover:bg-gray-100 cursor-pointer

                    ${option.value === value ? 'bg-blue-50 text-blue-600' : ''}

                  `}

                  onClick={() => handleOptionSelect(option.value)}

                >

                  {option.label}

                </div>

              ))}

            </div>

          </div>

        )}

      </div>

      

      {error && <p className="mt-1 text-sm text-red-600">{error}</p>}

    </div>
  );
};

export default Dropdown;