import {
  View, Text, ScrollView, TouchableOpacity, Linking, ActivityIndicator, StyleSheet,
} from 'react-native'
import { SafeAreaView } from 'react-native-safe-area-context'
import { useLocalSearchParams, useRouter } from 'expo-router'
import { Ionicons } from '@expo/vector-icons'
import { useMemberDetail } from '@/hooks/useMembers'
import { Avatar } from '@/components/ui/Avatar'
import { trpc } from '@/lib/trpc'

export default function MemberDetailScreen() {
  const { id } = useLocalSearchParams<{ id: string }>()
  const router = useRouter()
  const { data: member, isLoading } = useMemberDetail(id)
  const getOrCreate = trpc.messages.getOrCreate.useMutation({
    onSuccess: ({ conversationId }) => {
      router.push({
        pathname: '/(app)/chat/[id]',
        params: { id: conversationId, name: member?.name ?? '' },
      })
    },
  })

  if (isLoading) {
    return (
      <SafeAreaView style={styles.loadingContainer}>
        <ActivityIndicator size="large" color="#003B7E" />
      </SafeAreaView>
    )
  }
  if (!member) return null

  const fields = [
    member.sparte ? ['SPARTE', member.sparte] : null,
    member.ort    ? ['ORT', member.ort]       : null,
    member.seit   ? ['MITGLIED SEIT', String(member.seit)] : null,
  ].filter(Boolean) as [string, string][]

  return (
    <SafeAreaView style={styles.safeArea} edges={['top']}>
      {/* Nav */}
      <View style={styles.navBar}>
        <TouchableOpacity onPress={() => router.back()} style={styles.backBtn} activeOpacity={0.7}>
          <Ionicons name="chevron-back" size={20} color="#003B7E" />
          <Text style={styles.backText}>Zurück</Text>
        </TouchableOpacity>
      </View>
      <View style={styles.divider} />

      <ScrollView showsVerticalScrollIndicator={false}>
        {/* Hero */}
        <View style={styles.hero}>
          <Avatar name={member.name} imageUrl={member.avatarUrl ?? undefined} size={80} shadow />
          <Text style={styles.heroName}>{member.name}</Text>
          <Text style={styles.heroCompany}>{member.betrieb}</Text>
          {member.istAusbildungsbetrieb && (
            <View style={styles.ausbildungPill}>
              <Ionicons name="school" size={12} color="#15803D" />
              <Text style={styles.ausbildungText}>Ausbildungsbetrieb</Text>
            </View>
          )}
        </View>

        <View style={styles.divider} />

        {/* Details */}
        <View style={styles.card}>
          {fields.map(([label, value], idx) => (
            <View
              key={label}
              style={[styles.fieldRow, idx < fields.length - 1 && styles.fieldRowBorder]}
            >
              <Text style={styles.fieldLabel}>{label}</Text>
              <Text style={styles.fieldValue}>{value}</Text>
            </View>
          ))}
        </View>

        {/* Actions */}
        <View style={styles.actions}>
          {member.telefon && (
            <TouchableOpacity
              onPress={() => Linking.openURL(`tel:${member.telefon}`)}
              style={styles.btnPrimary}
              activeOpacity={0.82}
            >
              <Ionicons name="call" size={18} color="#FFFFFF" />
              <Text style={styles.btnPrimaryText}>Anrufen</Text>
            </TouchableOpacity>
          )}
          <TouchableOpacity
            onPress={() => Linking.openURL(`mailto:${member.email}`)}
            style={styles.btnSecondary}
            activeOpacity={0.8}
          >
            <Ionicons name="mail-outline" size={18} color="#0F172A" />
            <Text style={styles.btnSecondaryText}>E-Mail senden</Text>
          </TouchableOpacity>
          <TouchableOpacity
            onPress={() => getOrCreate.mutate({ otherMemberId: id })}
            style={[styles.btnSecondary, getOrCreate.isPending && { opacity: 0.6 }]}
            activeOpacity={0.8}
            disabled={getOrCreate.isPending}
          >
            <Ionicons name="chatbubble-outline" size={18} color="#0F172A" />
            <Text style={styles.btnSecondaryText}>Nachricht schreiben</Text>
          </TouchableOpacity>
        </View>
      </ScrollView>
    </SafeAreaView>
  )
}

const styles = StyleSheet.create({
  safeArea: {
    flex: 1,
    backgroundColor: '#F8FAFC',
  },
  loadingContainer: {
    flex: 1,
    backgroundColor: '#FFFFFF',
    alignItems: 'center',
    justifyContent: 'center',
  },
  navBar: {
    backgroundColor: '#FFFFFF',
    paddingHorizontal: 16,
    paddingVertical: 12,
  },
  backBtn: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 2,
  },
  backText: {
    fontSize: 14,
    fontWeight: '600',
    color: '#003B7E',
  },
  divider: {
    height: 1,
    backgroundColor: '#E2E8F0',
  },
  hero: {
    backgroundColor: '#FFFFFF',
    alignItems: 'center',
    paddingVertical: 32,
    paddingHorizontal: 24,
  },
  heroName: {
    fontSize: 21,
    fontWeight: '800',
    color: '#0F172A',
    letterSpacing: -0.4,
    marginTop: 14,
    textAlign: 'center',
  },
  heroCompany: {
    fontSize: 14,
    color: '#475569',
    marginTop: 3,
    textAlign: 'center',
  },
  ausbildungPill: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 5,
    backgroundColor: '#F0FDF4',
    paddingHorizontal: 12,
    paddingVertical: 6,
    borderRadius: 99,
    marginTop: 10,
  },
  ausbildungText: {
    fontSize: 12,
    color: '#15803D',
    fontWeight: '600',
  },
  card: {
    backgroundColor: '#FFFFFF',
    marginHorizontal: 16,
    marginTop: 16,
    borderRadius: 16,
    overflow: 'hidden',
    shadowColor: '#1C1917',
    shadowOffset: { width: 0, height: 1 },
    shadowOpacity: 0.05,
    shadowRadius: 8,
    elevation: 1,
  },
  fieldRow: {
    flexDirection: 'row',
    alignItems: 'center',
    paddingHorizontal: 16,
    paddingVertical: 13,
  },
  fieldRowBorder: {
    borderBottomWidth: 1,
    borderBottomColor: '#F9F9F9',
  },
  fieldLabel: {
    fontSize: 10,
    fontWeight: '700',
    color: '#64748B',
    letterSpacing: 0.8,
    width: 110,
  },
  fieldValue: {
    flex: 1,
    fontSize: 14,
    fontWeight: '500',
    color: '#0F172A',
  },
  actions: {
    marginHorizontal: 16,
    marginTop: 16,
    marginBottom: 32,
    gap: 10,
  },
  btnPrimary: {
    backgroundColor: '#003B7E',
    borderRadius: 14,
    paddingVertical: 15,
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'center',
    gap: 8,
    shadowColor: '#003B7E',
    shadowOffset: { width: 0, height: 4 },
    shadowOpacity: 0.24,
    shadowRadius: 10,
    elevation: 5,
  },
  btnPrimaryText: {
    color: '#FFFFFF',
    fontSize: 15,
    fontWeight: '600',
    letterSpacing: 0.2,
  },
  btnSecondary: {
    backgroundColor: '#FFFFFF',
    borderRadius: 14,
    paddingVertical: 15,
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'center',
    gap: 8,
    borderWidth: 1,
    borderColor: '#E2E8F0',
  },
  btnSecondaryText: {
    color: '#0F172A',
    fontSize: 15,
    fontWeight: '600',
  },
})