/**
 * EvidencePanel Component
 * Displays extracted evidence from image analysis
 */

import React from 'react';
import {
  View,
  Text,
  StyleSheet,
  ScrollView,
  Animated,
} from 'react-native';
import Icon from 'react-native-vector-icons/MaterialIcons';

export default function EvidencePanel({ evidence, confidence }) {
  if (!evidence) return null;

  const fadeAnim = new Animated.Value(0);

  React.useEffect(() => {
    Animated.timing(fadeAnim, {
      toValue: 1,
      duration: 500,
      useNativeDriver: true,
    }).start();
  }, [evidence]);

  const renderEvidenceLayer = (icon, title, items, color) => (
    <View style={[styles.layerCard, { borderLeftColor: color }]}>
      <View style={styles.layerHeader}>
        <Icon name={icon} size={20} color={color} />
        <Text style={[styles.layerTitle, { color }]}>{title}</Text>
        <Text style={styles.layerCount}>{items?.length || 0}</Text>
      </View>
      {items && items.map((item, index) => (
        <Text key={index} style={styles.layerItem}>• {item}</Text>
      ))}
    </View>
  );

  return (
    <Animated.View style={[styles.container, { opacity: fadeAnim }]}>
      <ScrollView style={styles.scrollView}>
        {/* Confidence Header */}
        <View style={styles.confidenceHeader}>
          <Text style={styles.confidenceTitle}>Evidence Analysis</Text>
          <View style={styles.confidenceBadge}>
            <Text style={styles.confidenceText}>
              {(confidence * 100).toFixed(0)}% confidence
            </Text>
          </View>
        </View>

        {/* Evidence Layers */}
        {renderEvidenceLayer('camera-alt', 'Metadata', 
          evidence.metadata ? [
            `GPS: ${evidence.metadata.latitude?.toFixed(6)}, ${evidence.metadata.longitude?.toFixed(6)}`,
            `Accuracy: ±${evidence.metadata.accuracy?.toFixed(0)}m`,
            `Device: ${evidence.metadata.device_model}`,
          ] : [], '#007AFF')}

        {renderEvidenceLayer('visibility', 'Visual Objects',
          evidence.visual_objects?.map(obj => `${obj.label} (${(obj.confidence * 100).toFixed(0)}%)`), '#34C759')}

        {renderEvidenceLayer('category', 'Semantic Objects',
          evidence.semantic_objects?.map(obj => `${obj.label} (${(obj.confidence * 100).toFixed(0)}%)`), '#5856D6')}

        {renderEvidenceLayer('text-fields', 'Text Detections',
          evidence.text_detections?.map(t => t.text), '#FF9500')}

        {renderEvidenceLayer('straighten', 'Geometric Features',
          evidence.geometric_features ? [
            `Horizon: ${evidence.geometric_features.horizon_detected ? 'Yes' : 'No'}`,
            `Vanishing points: ${evidence.geometric_features.vanishing_points || 0}`,
          ] : [], '#AF52DE')}

        {renderEvidenceLayer('wb-sunny', 'Environmental',
          evidence.environmental_signals ? [
            `Time: ${evidence.environmental_signals.time_of_day}`,
            `Lighting: ${evidence.environmental_signals.lighting_quality}`,
            `Weather: ${evidence.environmental_signals.weather || 'Unknown'}`,
          ] : [], '#FF3B30')}

        {renderEvidenceLayer('history', 'Temporal',
          evidence.temporal_signals ? [
            `Season: ${evidence.temporal_signals.season}`,
            `Day: ${evidence.temporal_signals.day_of_week}`,
          ] : [], '#5AC8FA')}
      </ScrollView>
    </Animated.View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#000',
  },
  scrollView: {
    flex: 1,
    padding: 16,
  },
  confidenceHeader: {
    flexDirection: 'row',
    justifyContent: 'space-between',
    alignItems: 'center',
    marginBottom: 16,
  },
  confidenceTitle: {
    fontSize: 20,
    fontWeight: '700',
    color: '#fff',
  },
  confidenceBadge: {
    backgroundColor: 'rgba(0,122,255,0.3)',
    paddingHorizontal: 12,
    paddingVertical: 6,
    borderRadius: 16,
  },
  confidenceText: {
    color: '#007AFF',
    fontSize: 14,
    fontWeight: '600',
  },
  layerCard: {
    backgroundColor: '#1C1C1E',
    borderRadius: 12,
    padding: 16,
    marginBottom: 12,
    borderLeftWidth: 4,
  },
  layerHeader: {
    flexDirection: 'row',
    alignItems: 'center',
    marginBottom: 8,
  },
  layerTitle: {
    fontSize: 16,
    fontWeight: '600',
    marginLeft: 8,
    flex: 1,
  },
  layerCount: {
    fontSize: 14,
    color: '#8E8E93',
    fontWeight: '600',
  },
  layerItem: {
    fontSize: 14,
    color: '#8E8E93',
    marginLeft: 28,
    marginBottom: 4,
  },
});