web/src/components/LoadingScreen.js

import React from 'react';
import { useTranslation } from 'react-i18next';

const LoadingScreen = () => {
  const { t, i18n } = useTranslation();

  const handleLanguageChange = (e) => {
    i18n.changeLanguage(e.target.value);
  };

  return (
    <div style={{
      position: 'fixed',
      top: 0,
      left: 0,
      width: '100vw',
      height: '100vh',
      background: 'linear-gradient(135deg, #1B5E20 0%, #2E7D32 50%, #4CAF50 100%)',
      display: 'flex',
      flexDirection: 'column',
      justifyContent: 'center',
      alignItems: 'center',
      zIndex: 9999,
      padding: '20px'
    }}>
      {/* Language Selector */}
      <div style={{
        position: 'absolute',
        top: '20px',
        right: '20px',
        background: 'rgba(255, 255, 255, 0.1)',
        padding: '8px',
        borderRadius: '8px'
      }}>
        <select 
          id="language-select-loading"
          onChange={handleLanguageChange} 
          value={i18n.language} 
          style={{
            background: 'transparent',
            color: 'white',
            border: '1px solid white',
            borderRadius: '5px',
            padding: '5px 10px',
            cursor: 'pointer',
            fontSize: '1rem'
          }}
        >
          <option value="vi" style={{color: 'black'}}>Tiếng Việt</option>
          <option value="en" style={{color: 'black'}}>English</option>
        </select>
      </div>

      {/* Logo */}
      <div style={{
        textAlign: 'center',
        marginBottom: '40px'
      }}>
        <div style={{
          fontSize: '6rem',
          marginBottom: '20px',
          animation: 'pulse 2s ease-in-out infinite'
        }}>
          🌱
        </div>
        <h1 style={{
          fontSize: '4rem',
          color: 'white',
          margin: 0,
          fontWeight: 'bold',
          textShadow: '2px 2px 4px rgba(0,0,0,0.3)',
          animation: 'fadeInUp 1s ease-out'
        }}>
            {t('loadingScreen.title')}
        </h1>
        <p style={{
          fontSize: '1.5rem',
          color: '#E8F5E9',
          margin: '10px 0 0 0',
          fontWeight: '300',
          animation: 'fadeInUp 1s ease-out 0.3s both'
        }}>
          {t('loadingScreen.subtitle')}
        </p>
      </div>

      {/* Loading Animation */}
      <div style={{
        display: 'flex',
        gap: '8px',
        marginTop: '20px'
      }}>
        <div style={{
          width: '12px',
          height: '12px',
          borderRadius: '50%',
          background: 'white',
          animation: 'bounce 1.4s ease-in-out infinite both',
          animationDelay: '0s'
        }}></div>
        <div style={{
          width: '12px',
          height: '12px',
          borderRadius: '50%',
          background: 'white',
          animation: 'bounce 1.4s ease-in-out infinite both',
          animationDelay: '0.16s'
        }}></div>
        <div style={{
          width: '12px',
          height: '12px',
          borderRadius: '50%',
          background: 'white',
          animation: 'bounce 1.4s ease-in-out infinite both',
          animationDelay: '0.32s'
        }}></div>
      </div>

      {/* Loading Text */}
      <p style={{
        color: 'white',
        fontSize: '1.1rem',
        marginTop: '30px',
        opacity: 0.9,
        animation: 'fadeIn 2s ease-in-out'
      }}>
        {t('loadingScreen.loadingText')}
      </p>

      <style jsx>{`
        @keyframes pulse {
          0%, 100% {
            transform: scale(1);
          }
          50% {
            transform: scale(1.1);
          }
        }

        @keyframes fadeInUp {
          from {
            opacity: 0;
            transform: translateY(30px);
          }
          to {
            opacity: 1;
            transform: translateY(0);
          }
        }

        @keyframes fadeIn {
          from {
            opacity: 0;
          }
          to {
            opacity: 1;
          }
        }

        @keyframes bounce {
          0%, 80%, 100% {
            transform: scale(0);
          }
          40% {
            transform: scale(1);
          }
        }
      `}</style>
    </div>
  );
};

export default LoadingScreen;