import React, { useEffect, useRef, useState } from 'react';
import {
  View,
  Text,
  TouchableOpacity,
  StyleSheet,
  Animated,
} from 'react-native';
import { useLocalSearchParams, useRouter } from 'expo-router';
import { Ionicons } from '@expo/vector-icons';
import { SafeAreaView } from 'react-native-safe-area-context';
import { SvgXml } from 'react-native-svg';
import { colors, typography, spacing, radius } from '@shared/theme';
import { writeNFCTagUseCase, nfcRepository } from '@infrastructure/container';
import { Button } from '@presentation/components/ui/Button';

const NFC_SVG = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
  <g stroke="${colors.textSecondary}" stroke-width="10" fill="none">
    <path d="M 23.49 41.51 A 12 12 0 0 1 23.49 58.49"/>
    <path d="M 34.80 30.20 A 28 28 0 0 1 34.80 69.80"/>
    <path d="M 46.11 18.89 A 44 44 0 0 1 46.11 81.11"/>
    <path d="M 57.43 7.57 A 60 60 0 0 1 57.43 92.43"/>
  </g>
</svg>`;

type Status = 'waiting' | 'writing' | 'success' | 'error';

/**
 * Tela de gravação NFC — acessada a partir do Detalhe do Filamento
 */
export default function WriteNFCScreen(): React.ReactElement {
  const { id } = useLocalSearchParams<{ id: string }>();
  const router = useRouter();
  const [status, setStatus] = useState<Status>('waiting');
  const [errorMessage, setErrorMessage] = useState('');
  const ring1 = useRef(new Animated.Value(0)).current;
  const ring2 = useRef(new Animated.Value(0)).current;
  const ring3 = useRef(new Animated.Value(0)).current;
  const animRef = useRef<Animated.CompositeAnimation[]>([]);

  useEffect(() => {
    startPulse();
    startWriting();
    return () => {
      stopPulse();
      nfcRepository.cancelSession().catch(() => {});
    };
  }, []);

  function startPulse(): void {
    const pulse = (ring: Animated.Value, delay: number) =>
      Animated.loop(
        Animated.sequence([
          Animated.delay(delay),
          Animated.timing(ring, { toValue: 1, duration: 1400, useNativeDriver: true }),
          Animated.timing(ring, { toValue: 0, duration: 0, useNativeDriver: true }),
        ]),
      );
    const a1 = pulse(ring1, 0);
    const a2 = pulse(ring2, 400);
    const a3 = pulse(ring3, 800);
    animRef.current = [a1, a2, a3];
    a1.start(); a2.start(); a3.start();
  }

  function stopPulse(): void {
    animRef.current.forEach((a) => a.stop());
    ring1.setValue(0); ring2.setValue(0); ring3.setValue(0);
  }

  async function startWriting(): Promise<void> {
    setStatus('writing');
    try {
      await writeNFCTagUseCase.execute(id);
      stopPulse();
      setStatus('success');
    } catch (err: unknown) {
      stopPulse();
      setErrorMessage(err instanceof Error ? err.message : 'Erro ao gravar a tag.');
      setStatus('error');
    }
  }

  const ringStyle = (anim: Animated.Value) => ({
    opacity: anim.interpolate({ inputRange: [0, 0.5, 1], outputRange: [0.5, 0.15, 0] }),
    transform: [{ scale: anim.interpolate({ inputRange: [0, 1], outputRange: [1, 2.2] }) }],
  });

  return (
    <SafeAreaView style={styles.safe}>
      {/* Header */}
      <View style={styles.header}>
        <TouchableOpacity onPress={() => {
          nfcRepository.cancelSession().catch(() => {});
          router.back();
        }}>
          <Ionicons name="chevron-back" size={24} color={colors.textPrimary} />
        </TouchableOpacity>
        <Text style={styles.headerTitle}>Gravar NFC</Text>
        <View style={{ width: 24 }} />
      </View>

      {/* Content */}
      <View style={styles.content}>
        {/* Icon with rings */}
        <View style={styles.iconArea}>
          {status === 'writing' && (
            <>
              <Animated.View style={[styles.ring, ringStyle(ring3)]} />
              <Animated.View style={[styles.ring, ringStyle(ring2)]} />
              <Animated.View style={[styles.ring, ringStyle(ring1)]} />
            </>
          )}
          <View style={[
            styles.iconCircle,
            status === 'success' && styles.iconCircleSuccess,
            status === 'error' && styles.iconCircleError,
          ]}>
            {status === 'success'
              ? <Ionicons name="checkmark" size={40} color={colors.stockOk} />
              : status === 'error'
                ? <Ionicons name="close" size={40} color={colors.error} />
                : <SvgXml xml={NFC_SVG} width={40} height={40} />
            }
          </View>
        </View>

        {/* Status text */}
        {status === 'waiting' || status === 'writing' ? (
          <>
            <Text style={styles.title}>Aproxime a tag NTAG215</Text>
            <Text style={styles.subtitle}>
              Encoste a tag NFC ao sensor do dispositivo para gravar os dados do filamento
            </Text>
          </>
        ) : status === 'success' ? (
          <>
            <Text style={styles.title}>Tag gravada!</Text>
            <Text style={styles.subtitle}>
              A tag NFC foi configurada com sucesso para este filamento
            </Text>
          </>
        ) : (
          <>
            <Text style={styles.titleError}>Falha na gravação</Text>
            <Text style={styles.subtitle}>{errorMessage}</Text>
          </>
        )}
      </View>

      {/* Footer actions */}
      <View style={styles.footer}>
        {status === 'success' ? (
          <Button label="Concluir" onPress={() => router.back()} />
        ) : status === 'error' ? (
          <>
            <Button label="Tentar novamente" onPress={startWriting} />
            <TouchableOpacity style={styles.cancelBtn} onPress={() => router.back()}>
              <Text style={styles.cancelText}>Cancelar</Text>
            </TouchableOpacity>
          </>
        ) : (
          <TouchableOpacity
            style={styles.cancelBtn}
            onPress={() => {
              nfcRepository.cancelSession().catch(() => {});
              router.back();
            }}
          >
            <Text style={styles.cancelText}>Cancelar</Text>
          </TouchableOpacity>
        )}
      </View>
    </SafeAreaView>
  );
}

const RING_SIZE = 120;

const styles = StyleSheet.create({
  safe: { flex: 1, backgroundColor: colors.bgBase },
  header: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    paddingHorizontal: spacing[5],
    paddingVertical: spacing[4],
  },
  headerTitle: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.md,
    fontWeight: typography.fontWeight.semibold,
    color: colors.textPrimary,
  },
  content: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
    gap: spacing[4],
    paddingHorizontal: spacing[6],
  },
  iconArea: {
    width: RING_SIZE * 2.2,
    height: RING_SIZE * 2.2,
    alignItems: 'center',
    justifyContent: 'center',
    marginBottom: spacing[2],
  },
  ring: {
    position: 'absolute',
    width: RING_SIZE,
    height: RING_SIZE,
    borderRadius: RING_SIZE / 2,
    borderWidth: 2,
    borderColor: colors.accent,
  },
  iconCircle: {
    width: RING_SIZE,
    height: RING_SIZE,
    borderRadius: RING_SIZE / 2,
    backgroundColor: colors.bgHover,
    borderWidth: 1,
    borderColor: colors.border,
    alignItems: 'center',
    justifyContent: 'center',
  },
  iconCircleSuccess: {
    borderColor: colors.stockOk,
    backgroundColor: `${colors.stockOk}15`,
  },
  iconCircleError: {
    borderColor: colors.error,
    backgroundColor: `${colors.error}15`,
  },
  title: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.xl,
    fontWeight: typography.fontWeight.semibold,
    color: colors.textPrimary,
    textAlign: 'center',
  },
  titleError: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.xl,
    fontWeight: typography.fontWeight.semibold,
    color: colors.error,
    textAlign: 'center',
  },
  subtitle: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.sm,
    color: colors.textSecondary,
    textAlign: 'center',
    lineHeight: 20,
  },
  footer: {
    padding: spacing[5],
    gap: spacing[3],
    borderTopWidth: 1,
    borderTopColor: colors.border,
  },
  cancelBtn: {
    alignItems: 'center',
    paddingVertical: spacing[3],
  },
  cancelText: {
    fontFamily: typography.fontFamily.ui,
    fontSize: typography.fontSize.base,
    color: colors.textSecondary,
  },
});