import { useState } from 'react';

interface TextInputSectionProps {
  text: string;
  onChange: (text: string) => void;
  onNext: () => void;
  isLoading: boolean;
  disabled: boolean;
}

export default function TextInputSection({
  text,
  onChange,
  onNext,
  isLoading,
  disabled
}: TextInputSectionProps) {
  const [showValidation, setShowValidation] = useState(false);

  const handleNext = () => {
    if (text.trim() === '') {
      setShowValidation(true);
      return;
    }
    setShowValidation(false);
    onNext();
  };

  const handleTextChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
    onChange(e.target.value);
    if (e.target.value.trim() !== '') {
      setShowValidation(false);
    }
  };

  const isButtonDisabled = disabled || isLoading || text.trim() === '';

  return (
    <div className="w-full max-w-4xl mx-auto p-6 sm:p-8 glass-effect rounded-3xl shadow-glow card-hover">
      <div className="flex items-center gap-4 mb-6 sm:mb-8">
        <div className="w-14 h-14 bg-gradient-to-br from-purple-500 via-purple-600 to-indigo-600 rounded-2xl flex items-center justify-center shadow-lg shadow-purple-500/50">
          <span className="text-2xl">📝</span>
        </div>
        <div>
          <h2 className="text-2xl sm:text-3xl font-extrabold gradient-text-animated">Enter Your Text</h2>
          <p className="text-gray-600 text-sm mt-1">Paste or type your story below</p>
        </div>
      </div>
      
      <div className="mb-6 relative">
        <textarea
          value={text}
          onChange={handleTextChange}
          placeholder="Enter your text here. Use patterns like 'Name:' or '[Name]' to mark different speakers...

Example:
Sarah: Hello! How are you today?
John: I'm doing great, thanks for asking!"
          className="w-full h-72 sm:h-80 md:h-96 p-5 sm:p-6 border-2 border-purple-300 rounded-2xl focus:border-purple-600 focus:ring-4 focus:ring-purple-300 focus:outline-none resize-y text-sm sm:text-base touch-manipulation shadow-inner bg-gradient-to-br from-white to-purple-50/30 font-mono leading-relaxed"
          disabled={disabled || isLoading}
        />
        <div className="absolute bottom-4 right-4 text-xs text-gray-500 bg-white/80 px-3 py-1 rounded-lg backdrop-blur-sm">
          {text.length} characters
        </div>
      </div>

      {showValidation && text.trim() === '' && (
        <div className="mb-6 p-4 sm:p-5 bg-gradient-to-r from-red-50 to-pink-50 border-2 border-red-400 text-red-700 rounded-2xl shadow-lg text-sm sm:text-base animate-pulse">
          <div className="flex items-center gap-3">
            <span className="text-2xl">⚠️</span>
            <p className="font-bold">Please enter some text before proceeding.</p>
          </div>
        </div>
      )}

      <div className="flex justify-center">
        <button
          onClick={handleNext}
          disabled={isButtonDisabled}
          className={`px-10 py-5 min-h-[56px] rounded-2xl font-bold text-white text-lg transition-all touch-manipulation shadow-2xl relative overflow-hidden ${
            isButtonDisabled
              ? 'bg-gray-400 cursor-not-allowed opacity-60'
              : 'bg-gradient-to-r from-purple-600 via-purple-700 to-indigo-600 hover:from-purple-700 hover:via-purple-800 hover:to-indigo-700 cursor-pointer shadow-purple-500/50'
          }`}
        >
          {isLoading ? (
            <span className="flex items-center justify-center gap-3 relative z-10">
              <div className="relative">
                <div className="animate-spin rounded-full h-6 w-6 border-3 border-white/30"></div>
                <div className="animate-spin rounded-full h-6 w-6 border-3 border-white border-t-transparent absolute top-0 left-0"></div>
              </div>
              Processing...
            </span>
          ) : (
            <span className="flex items-center justify-center gap-3 relative z-10">
              Next: Assign Voices
              <span className="text-xl">→</span>
            </span>
          )}
        </button>
      </div>
    </div>
  );
}