import { View, Text, TouchableOpacity, ActivityIndicator, StyleSheet } from 'react-native'
import { Ionicons } from '@expo/vector-icons'
import { Badge } from '@/components/ui/Badge'
import { TERMIN_TYP_LABELS } from '@innungsapp/shared/types'
import { format } from 'date-fns'
import { de } from 'date-fns/locale'

interface TerminCardProps {
  termin: {
    id: string
    titel: string
    datum: Date
    uhrzeit: string | null
    ort: string | null
    typ: string
    isAngemeldet: boolean
    teilnehmerAnzahl: number
  }
  onPress: () => void
  onToggleAnmeldung?: () => void
  isToggling?: boolean
  isPast?: boolean
}

export function TerminCard({
  termin,
  onPress,
  onToggleAnmeldung,
  isToggling = false,
  isPast = false,
}: TerminCardProps) {
  const datum = new Date(termin.datum)

  return (
    <TouchableOpacity
      onPress={onPress}
      style={[styles.card, isPast && styles.cardPast]}
      activeOpacity={0.76}
    >
      {/* Date column */}
      <View style={[styles.dateColumn, isPast && styles.dateColumnPast]}>
        <Text style={[styles.dayNumber, isPast && styles.dayNumberPast]}>
          {format(datum, 'dd')}
        </Text>
        <Text style={[styles.monthLabel, isPast && styles.monthLabelPast]}>
          {format(datum, 'MMM', { locale: de }).toUpperCase()}
        </Text>
        {!isPast && termin.isAngemeldet && <View style={styles.registeredDot} />}
        {isPast && (
          <View style={styles.pastBadge}>
            <Text style={styles.pastBadgeText}>vorbei</Text>
          </View>
        )}
      </View>

      {/* Divider */}
      <View style={[styles.divider, isPast && styles.dividerPast]} />

      {/* Content */}
      <View style={styles.content}>
        <Badge label={TERMIN_TYP_LABELS[termin.typ]} typ={termin.typ} />
        <Text style={[styles.title, isPast && styles.titlePast]} numberOfLines={2}>
          {termin.titel}
        </Text>
        <View style={styles.metaRow}>
          {termin.uhrzeit && (
            <View style={styles.metaItem}>
              <Ionicons name="time-outline" size={12} color={isPast ? '#94A3B8' : '#64748B'} />
              <Text style={[styles.metaText, isPast && styles.metaTextPast]}>
                {termin.uhrzeit} Uhr
              </Text>
            </View>
          )}
          {termin.ort && (
            <View style={styles.metaItem}>
              <Ionicons name="location-outline" size={12} color={isPast ? '#94A3B8' : '#64748B'} />
              <Text style={[styles.metaText, isPast && styles.metaTextPast]} numberOfLines={1}>
                {termin.ort}
              </Text>
            </View>
          )}
        </View>

        {/* Registration status chip — only for upcoming events */}
        {!isPast && termin.isAngemeldet && onToggleAnmeldung && (
          <TouchableOpacity
            onPress={(e) => {
              e.stopPropagation?.()
              onToggleAnmeldung()
            }}
            style={styles.registeredChip}
            disabled={isToggling}
            activeOpacity={0.75}
          >
            {isToggling ? (
              <ActivityIndicator size="small" color="#047857" style={{ marginRight: 4 }} />
            ) : (
              <Ionicons name="checkmark-circle" size={14} color="#059669" />
            )}
            <Text style={styles.registeredChipText}>
              Angemeldet · <Text style={styles.abmeldenText}>Abmelden</Text>
            </Text>
          </TouchableOpacity>
        )}
      </View>

      {/* Chevron */}
      <View style={styles.chevronWrap}>
        <Ionicons name="chevron-forward" size={20} color={isPast ? '#E2E8F0' : '#CBD5E1'} />
      </View>
    </TouchableOpacity>
  )
}

const styles = StyleSheet.create({
  card: {
    backgroundColor: '#FFFFFF',
    borderRadius: 16,
    flexDirection: 'row',
    alignItems: 'center',
    overflow: 'hidden',
    shadowColor: '#1C1917',
    shadowOffset: { width: 0, height: 2 },
    shadowOpacity: 0.08,
    shadowRadius: 12,
    elevation: 3,
  },
  cardPast: {
    shadowOpacity: 0.04,
    elevation: 1,
  },
  dateColumn: {
    width: 64,
    alignItems: 'center',
    justifyContent: 'center',
    paddingVertical: 18,
    backgroundColor: '#EFF6FF',
  },
  dateColumnPast: {
    backgroundColor: '#F4F4F5',
  },
  dayNumber: {
    fontSize: 28,
    fontWeight: '800',
    color: '#003B7E',
    lineHeight: 30,
  },
  dayNumberPast: {
    color: '#94A3B8',
  },
  monthLabel: {
    fontSize: 10,
    fontWeight: '700',
    color: '#003B7E',
    letterSpacing: 1,
    opacity: 0.75,
    marginTop: 1,
  },
  monthLabelPast: {
    color: '#94A3B8',
    opacity: 1,
  },
  registeredDot: {
    width: 6,
    height: 6,
    borderRadius: 3,
    backgroundColor: '#059669',
    marginTop: 6,
  },
  pastBadge: {
    marginTop: 6,
    backgroundColor: '#E2E8F0',
    borderRadius: 99,
    paddingHorizontal: 6,
    paddingVertical: 2,
  },
  pastBadgeText: {
    fontSize: 9,
    fontWeight: '700',
    color: '#94A3B8',
    letterSpacing: 0.5,
    textTransform: 'uppercase',
  },
  divider: {
    width: 1,
    alignSelf: 'stretch',
    marginVertical: 14,
    backgroundColor: '#F0EDED',
  },
  dividerPast: {
    backgroundColor: '#F4F4F5',
  },
  content: {
    flex: 1,
    paddingHorizontal: 14,
    paddingVertical: 14,
    gap: 8,
  },
  title: {
    fontSize: 15,
    fontWeight: '600',
    color: '#0F172A',
    letterSpacing: -0.2,
    lineHeight: 21,
    marginTop: 2,
  },
  titlePast: {
    color: '#94A3B8',
    fontWeight: '500',
  },
  metaRow: {
    flexDirection: 'column',
    gap: 4,
    marginTop: 4,
  },
  metaItem: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 4,
  },
  metaText: {
    fontSize: 12,
    color: '#64748B',
  },
  metaTextPast: {
    color: '#94A3B8',
  },
  registeredChip: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 5,
    marginTop: 4,
    alignSelf: 'flex-start',
    backgroundColor: '#ECFDF5',
    borderRadius: 99,
    paddingHorizontal: 10,
    paddingVertical: 5,
    borderWidth: 1,
    borderColor: '#A7F3D0',
  },
  registeredChipText: {
    fontSize: 12,
    fontWeight: '600',
    color: '#047857',
  },
  abmeldenText: {
    color: '#DC2626',
    fontWeight: '600',
  },
  chevronWrap: {
    paddingRight: 12,
  },
})