import React, { Component } from 'react';
import {
  Box,
  Typography,
  TextField,
  Button,
  Paper,
  Alert,
  CircularProgress,
  Rating
} from '@mui/material';
import StarIcon from '@mui/icons-material/Star';
import { withI18n } from '../i18n/withTranslation.js';
import PhotoUpload from './PhotoUpload.js';

class ArticleRatingForm extends Component {
  constructor(props) {
    super(props);
    this.state = {
      name: '',
      email: '',
      rating: 0,
      review: '',
      photos: [],
      loading: false,
      success: false,
      error: null
    };
    this.photoUploadRef = React.createRef();
  }

  handleInputChange = (field) => (event) => {
    this.setState({ [field]: event.target.value });
  };

  handleRatingChange = (event, newValue) => {
    this.setState({ rating: newValue });
  };

  handlePhotosChange = (files) => {
    this.setState({ photos: files });
  };

  convertPhotosToBase64 = (photos) => {
    return Promise.all(
      photos.map(photo => {
        return new Promise((resolve, _reject) => {
          const reader = new FileReader();
          reader.onload = (e) => {
            resolve({
              name: photo.name,
              type: photo.type,
              size: photo.size,
              data: e.target.result // base64 string
            });
          };
          reader.readAsDataURL(photo);
        });
      })
    );
  };

  handleSubmit = async (event) => {
    event.preventDefault();
    
    this.setState({ loading: true });

    try {
      // Convert photos to base64
      const photosBase64 = await this.convertPhotosToBase64(this.state.photos);
      
      // Prepare data for API emission
      const ratingData = {
        type: 'article_rating',
        productId: this.props.productId,
        productName: this.props.productName,
        name: this.state.name,
        email: this.state.email,
        rating: this.state.rating,
        review: this.state.review,
        photos: photosBase64,
        timestamp: new Date().toISOString()
      };

      // Emit data via socket
      console.log('Article Rating Data to emit:', ratingData);
      
      if (this.props.socket) {
        this.props.socket.emit('article_rating_submit', ratingData);
        
        // Set up response handler
        this.props.socket.once('article_rating_response', (response) => {
          if (response.success) {
            this.setState({ 
              loading: false,
              success: true,
              name: '',
              email: '',
              rating: 0,
              review: '',
              photos: []
            });
            // Reset the photo upload component
            if (this.photoUploadRef.current) {
              this.photoUploadRef.current.reset();
            }
          } else {
            this.setState({ 
              loading: false,
              error: response.error || 'Ein Fehler ist aufgetreten'
            });
          }
          
          // Clear messages after 3 seconds
          setTimeout(() => {
            this.setState({ success: false, error: null });
          }, 3000);
        });
      }
    } catch {
      this.setState({ 
        loading: false,
        error: 'Fehler beim Verarbeiten der Fotos'
      });
    }
    
            // Fallback timeout in case backend doesn't respond
        setTimeout(() => {
          if (this.state.loading) {
            this.setState({ 
              loading: false,
              success: true,
              name: '',
              email: '',
              rating: 0,
              review: '',
              photos: []
            });
            // Reset the photo upload component
            if (this.photoUploadRef.current) {
              this.photoUploadRef.current.reset();
            }
            
            // Clear success message after 3 seconds
            setTimeout(() => {
              this.setState({ success: false });
            }, 3000);
          }
        }, 5000);
  };

  render() {
    const { name, email, rating, review, loading, success, error } = this.state;

    return (
      <Paper sx={{ p: 3, mt: 4, borderRadius: 2, boxShadow: "0 2px 8px rgba(0,0,0,0.08)" }}>
        <Typography variant="h5" gutterBottom sx={{ fontWeight: 600, color: '#333' }}>
          Artikel Bewerten
        </Typography>
        
        <Typography variant="body2" color="text.secondary" sx={{ mb: 3 }}>
          Teilen Sie Ihre Erfahrungen mit diesem Artikel und helfen Sie anderen Kunden bei der Entscheidung.
        </Typography>

        {success && (
          <Alert severity="success" sx={{ mb: 3 }}>
            Vielen Dank für Ihre Bewertung! Sie wird nach Prüfung veröffentlicht.
          </Alert>
        )}

        {error && (
          <Alert severity="error" sx={{ mb: 3 }}>
            {error}
          </Alert>
        )}

        <Box component="form" onSubmit={this.handleSubmit} sx={{ display: 'flex', flexDirection: 'column', gap: 2 }}>
          <TextField
            label="Name"
            value={name}
            onChange={this.handleInputChange('name')}
            required
            fullWidth
            disabled={loading}
            placeholder="Ihr Name"
          />
          
          <TextField
            label="E-Mail"
            type="email"
            value={email}
            onChange={this.handleInputChange('email')}
            required
            fullWidth
            disabled={loading}
            placeholder="ihre.email@example.com"
            helperText="Ihre E-Mail wird nicht veröffentlicht"
          />
          
          <Box sx={{ display: 'flex', flexDirection: 'column', gap: 1 }}>
            <Typography variant="body2" sx={{ fontWeight: 500 }}>
              Bewertung *
            </Typography>
            <Box sx={{ display: 'flex', alignItems: 'center', gap: 1 }}>
              <Rating
                name="article-rating"
                value={rating}
                onChange={this.handleRatingChange}
                size="large"
                disabled={loading}
                emptyIcon={<StarIcon style={{ opacity: 0.55 }} fontSize="inherit" />}
              />
              <Typography variant="body2" color="text.secondary">
                {rating > 0 ? `${rating} von 5 Sternen` : 'Bitte bewerten'}
              </Typography>
            </Box>
          </Box>
          
          <TextField
            label="Ihre Bewertung (optional)"
            value={review}
            onChange={this.handleInputChange('review')}
            fullWidth
            multiline
            rows={4}
            disabled={loading}
            placeholder="Beschreiben Sie Ihre Erfahrungen mit diesem Artikel..."
          />

          <PhotoUpload
            ref={this.photoUploadRef}
            onChange={this.handlePhotosChange}
            disabled={loading}
            maxFiles={5}
            label="Fotos zur Bewertung anhängen (optional)"
          />
          
          <Button
            type="submit"
            variant="contained"
            disabled={loading || !name || !email || rating === 0}
            sx={{ 
              mt: 2,
              py: 1.5,
              fontSize: '1rem',
              fontWeight: 600
            }}
          >
            {loading ? (
              <>
                <CircularProgress size={20} sx={{ mr: 1 }} />
                Wird gesendet...
              </>
            ) : (
              'Bewertung abgeben'
            )}
          </Button>
        </Box>
      </Paper>
    );
  }
}

export default withI18n()(ArticleRatingForm);