import { useState } from 'react';
import { View, Text, FlatList, TextInput, TouchableOpacity, ActivityIndicator, RefreshControl } from 'react-native';
import { useQuery } from '@tanstack/react-query';
import { router } from 'expo-router';
import { api } from '../../../services/api';

const PRIORITY_COLOR: Record<string, string> = { HIGH: '#DC2626', MEDIUM: '#D97706', LOW: '#6B7280' };

export default function TicketsScreen() {
  const [search, setSearch] = useState('');
  const { data, isLoading, refetch, isRefetching } = useQuery({
    queryKey: ['tickets'],
    queryFn: () => api.get('/api/v1/tickets?limit=50').then(r => r.data?.data ?? r.data),
  });

  const tickets = (data ?? []).filter((t: any) =>
    `${t.subject} ${t.client?.firstName} ${t.client?.lastName}`.toLowerCase().includes(search.toLowerCase())
  );

  return (
    <View className="flex-1 bg-gray-50">
      <View className="px-4 pt-14 pb-4 bg-primary">
        <Text className="text-white text-xl font-bold">Helpdesk Tickets</Text>
      </View>
      <View className="px-4 py-3">
        <TextInput
          className="bg-white border border-gray-200 rounded-xl px-4 py-3"
          placeholder="Search tickets..."
          value={search}
          onChangeText={setSearch}
        />
      </View>
      {isLoading ? (
        <View className="flex-1 items-center justify-center"><ActivityIndicator color="#2563EB" /></View>
      ) : (
        <FlatList
          data={tickets}
          keyExtractor={(item) => item.id}
          refreshControl={<RefreshControl refreshing={isRefetching} onRefresh={refetch} />}
          contentContainerStyle={{ paddingHorizontal: 16, paddingBottom: 24 }}
          renderItem={({ item }) => (
            <TouchableOpacity
              className="bg-white rounded-xl p-4 mb-2 border border-gray-100"
              onPress={() => router.push(`/(app)/tickets/${item.id}`)}
            >
              <View className="flex-row justify-between items-start">
                <Text className="font-semibold text-gray-900 flex-1 mr-2">{item.subject}</Text>
                <View className="rounded-full px-2 py-0.5" style={{ backgroundColor: `${PRIORITY_COLOR[item.priority] ?? '#6B7280'}20` }}>
                  <Text className="text-xs font-medium" style={{ color: PRIORITY_COLOR[item.priority] ?? '#6B7280' }}>{item.priority}</Text>
                </View>
              </View>
              <Text className="text-gray-500 text-sm mt-1">{item.client?.firstName} {item.client?.lastName} · {item.status}</Text>
            </TouchableOpacity>
          )}
          ListEmptyComponent={<View className="items-center py-16"><Text className="text-gray-400">No tickets found</Text></View>}
        />
      )}
    </View>
  );
}
